Linear Encoders
For Numerically Controlled
Machine Tools

08/2023

Table of contents

Overview
Linear encoders

4

Selection guide6Technical features and mounting information
Measuring principles

Specifications
Linear encoder

Brochures regarding:• Exposed linear encoders• Angle encoders with integral bearing• Angle encoder modules• Modular angle encoders with scale drumor scale tape
• Rotary encoders• HEIDENHAIN controls• Encoders for machine tool inspection
and acceptance testing• Interfaces of HEIDENHAIN encoders
Technical information regarding:• Accuracy of feed axes
• Safety-related position measuringsystems• EnDat 2.2: bidirectional interface forposition encoders• Encoders for feed axes with direct drives28Absolute measuring method

8

Incremental measuring method

9Photoelectric scanning principle

10

Measuring accuracy

12

Mechanical design types and mounting guidelines

14

General information

18

Functional safety

20

Series or model
LC 400 series22

LC 100 series

26

For absolute position measurement
over large measuring lengths

LC 200 series with single-section housing

30

LC 200 series with multi-section housing32

For incremental linear measurementwith very high repeatability

LF 48534

LF 18536

For incremental linear measurement

LS 400 series38

LS 100 series40

LB 383C, single-section42

LB 383C, multi-section

44

Diagnostics, and inspection and testing devices

46

Related documents

47

For absolute position measurement

Further information is available on theInternet at www.heidenhain.com as well as
upon request.

Measuring standard

For incremental linear measurement
over large measuring lengths
Further information

This brochure supersedes all previous
editions, which thereby become invalid.
The basis for ordering from HEIDENHAIN
is always the brochure edition valid when
the order is placed.
Standards (ISO, EN, etc.) apply only
where explicitly stated in the brochure.

Further information:
For comprehensive descriptions of allavailable interfaces, as well as generalelectrical information, please refer to theInterfaces of HEIDENHAIN Encoders
brochure.

Linear encoders for numerically controlled machine tools

Linear encoders from HEIDENHAIN fornumerically controlled machine tools canbe used nearly everywhere. They are ideal
for machines and other equipment whose
feed axes are in a closed loop, such as
milling machines, machining centers,
boring mills, lathes, and grinding machines.
The beneficial dynamic behavior of linear
encoders, their high permissible traversing
speed, and their acceleration in the
direction of measurement predestine themfor use on highly-dynamic conventionalaxes as well as on direct drives.
HEIDENHAIN also supplies linear encoders
for other applications, such as:• Manual machine tools• Presses and bending machines• Automation and production equipment

Advantages of linear encoders
If a linear encoder is used for measurementof the slide position, the position control
loop includes the complete feed mechanics.
This is referred to as Closed Loop operation.
Transfer errors from the mechanics canbe detected by the linear encoder on thefeed axis, and corrected by the control
electronics. This makes it possible toeliminate a number of potential error
sources:• Positioning error due to thermal changes
in the recirculating ball screw• Reversal error• Kinematic error through the ball-screw
pitch error
Linear encoders are therefore indispensable
for machine tools on which high positioning
accuracy and a high machining rate are
essential.

Mechanical design
Linear encoders for numerically controlledmachine tools are sealed measuring
devices: an aluminum housing protects thescale, the scanning carriage, and its guidefrom chips, dust, and splashing water.
Downward-oriented elastic lips seal the
housing.
The scanning carriage travels along thescale on a low-friction guide. A coupling
connects the scanning carriage with themounting block and compensates themisalignment between the scale and themachine slide.
Depending on the encoder model, lateraland axial offsets of ±0.2 mm to ±0.3 mm
between the scale and mounting block arepermissible.

Thermal characteristics
Increasingly faster machining times withfully encapsulated machines cause everhigher temperatures in the machine’s
working space. Therefore, the thermal
behavior of the linear encoders usedbecomes increasingly important, since it
is an essential criterion for the working
accuracy of the machine.

Dynamic behavior
Efficiency and performance improvements
in machine tools require ever higher feed
rates and accelerations. Of course, theymust not compromise machining accuracy.
In order to transfer rapid and yet exact feed
motions, very high demands are placed on
rigid machine design as well as on thelinear encoders used.

As a general rule, the thermal behavior of
the linear encoder should match that of theworkpiece or measured object. During
temperature changes, the linear encoder
must expand or contract in a defined,
reproducible manner. Linear encoders from
HEIDENHAIN are designed for this.

Linear encoders from HEIDENHAIN are
characterized by their high rigidity in themeasuring direction. This is a very important
prerequisite for high-quality contouring
accuracy of a machine tool. In addition, thelow mass of moving components contributes
to their excellent dynamic behavior.

The graduation carriers of HEIDENHAIN
linear encoders have defined coefficients oflinear thermal expansion (see Specifications).
This makes it possible to select the linear
encoder whose thermal behavior is best
suited to the application.

Availability
The feed axes of machine tools travel quite
large distances—a typical value is 10 000 km
in three years. This is why sturdy encoders
with good long-term stability are especially
important: they ensure the constantavailability of the machine.
Due to the details of their design, linear
encoders from HEIDENHAIN function
properly even after years of operation. A
long service life is ensured by the contactfree photoelectric scanning of the measuring
standard and by the ball-bearing guidanceof the scanning carriage in the scale
housing. Thanks to their enclosure, special
scanning principles, and—if required—asealing air connection, the linear encoders
are particularly tolerant to contamination.
The complete shielding design ensures ahigh degree of electrical noise immunity.

Further information:
Please request further documentation
or inform yourself on the Internet atwww.heidenhain.com.

Scanning carriage

DIADUR
linear scaleLightsourceElectronic
scanning
Sealing lips

Mounting block

Schematic design of the LC 115 sealed linear encoder

4

5

Selection guideLinear encoders with slimline
scale housing
The linear encoders with slimline scale
housing are designed for limited
installation space. Larger measuring
lengths and higher acceleration loads are
possible through the use of a mounting
spar or clamping elements.

Linear encoders with full-size
scale housing
Linear encoders with full-size scale
housing are characterized by their sturdy
design, high resistance to vibration, andlarge measuring lengths. As a connection
between the scanning carriage and themounting block, they have an “oblique web,”which permits vertical and horizontal
mounting with the same degree ofprotection.

Cross
sectionAbsolute position
measurement• Glass scale

Accuracy
grade

Max.
Measuring lengthinterpolation (ML)error

Signal period

Interface

Model

±5 µm
±3 µm

±0.1 µm–

EnDat 2.2

LC 41520 µm

EnDat 2.2 with » 1 VPP

LC 485–

DRIVE-CLiQ

LC 495 S

Fanuc ÞiLC 495 F

Mitsubishi

LC 495 M

Panasonic

LC 495 P

70 mm to 1240 mm
With mounting sparor clamping elements:
70 mm to 2040 mm

Page

2)

22

24

Incremental linear
measurement with very
high repeatability• Steel scale• Small signal period

±5 µm
±3 µm

± 0.04 µm

50 mm to1220 mm

4 µm» 1 VPPLF 48534

Incremental linear
measurement• Glass scale

±5 µm
±3 µm

±0.2 µm

70 mm to 1240 mm
With mounting spar:
70 mm to 2040 mm

20 µm» 1 VPPLS 487

38

–

 TTL

LS 477

Absolute position
measurement• Glass scale

±5 µm
±3 µm

140 mm to4240 mm–

EnDat 2.2

LC 1152)

20 µm

EnDat 2.2 with » 1 VPP

LC 185–

DRIVE-CLiQ

LC 195 S

Fanuc ÞiLC 195 F

Mitsubishi

LC 195 M

Panasonic

LC 195 P–

EnDat 2.2

LC 211

40 µm

EnDat 2.2 with » 1 VPP

LC 281–

Fanuc ÞiLC 291 F

Mitsubishi

LC 291 M

Absolute position
measurement
For large measuring
lengths• Steel scale tape

±5 µm

1)

±0.1 µm±0.4 µm

440 mm to
28 040 mm

LC 41526

LF 485LS 487

LC 11528

30
LF 185

Incremental linear
measurement with very
high repeatability• Steel scale• Small signal period

±3 µm
±2 µm

± 0.04 µm

140 mm to3040 mm

4 µm» 1 VPPLF 18536

Incremental linear
measurement• Glass scale

±5 µm
±3 µm

± 0.2 µm

140 mm to3040 mm

20 µm» 1 VPPLS 18740

Incremental linear
measurement for large
measuring lengths• Steel scale tape

±5 µm

LC 211–

 TTL

LS 17740 µm» 1 VPPLB 383 C

Further information:
For further information about linear
encoders with optimized scanning,please see the LC 116/LC 196/LC 416/
LC 496 Product Information document
or go to www.heidenhain.com.

61)±0.8 µm

440 mm to
30 040 mm
Up to 72 040 mm
upon request

For measuring lengths > 3040 mm: ±0.4 µm at the butt joint (at approx. 3100 mm)

2)42Connectable to Yaskawa interface via EIB 3391Y

7

Measuring principles
Measuring standard

HEIDENHAIN encoders with optical scanningincorporate measuring standards of periodic
structures known as graduations. These
graduations are applied to a carrier substrate
made of glass or steel. For encoders withlong measuring lengths, steel tape is usedas the scale substrate.
HEIDENHAIN manufactures its precision
graduations in the following speciallydeveloped, photolithographic processes:• METALLUR: contamination-tolerant
graduation consisting of metal lines ongold; typical grating period: 40 μm• DIADUR: extremely robust chromiumlines on glass (typical grating period:
20 μm), or three-dimensional chromium
structures (typical grating period: 8 μm)
on glass• SUPRADUR phase grating: opticallythree-dimensional, planar structure;
particularly tolerant to contamination;
typical grating period: 8 μm and finer• OPTODUR phase grating: opticallythree-dimensional, planar structure withparticularly high reflectance; typicalgrating period: 2 μm and finer

Absolute measuring method

Incremental measuring method

In the absolute measuring method, theposition value is available immediately
upon encoder switch-on and can berequested by the downstream electronics
at any time. There is no need to move theaxes to find the reference position. The
absolute position information is read fromthe scale graduation, which is designed
as a serial absolute code structure. A
separate incremental track is interpolated
for the position value and is simultaneously
used to generate an optional incremental
signal.

In the incremental measuring method,
the graduation is a periodic grating
structure. The position information is
obtained through counting the individual
increments (measuring steps) starting at afreely selectable point of origin. Since theascertainment of positions requires anabsolute reference, the scales or scaletapes feature an additional track bearing areference mark. The absolute position on
the scale, established by the referencemark, is gated with exactly one signal
period.
Thus, before an absolute reference can beestablished or the most recently selectedreference point can be refound, thisreference mark must first be traversed.

In the most unfavorable case, machine
movements over sizeable sections of themeasuring range may be necessary. To
speed up and simplify such “reference
runs,” many HEIDENHAIN encoders
feature distance-coded referencemarks—multiple reference marks that are
individually spaced in accordance with amathematical algorithm. The downstream
electronics find the absolute reference
after traversing two successive referencemarks—thus after a traverse path of only
a few millimeters (see table below).
Encoders with distance-coded referencemarks are identified with a “C” following
the model designation (e.g., LS 487 C).
With distance-coded reference marks,
the absolute reference is calculated bycounting the increments between two
reference marks and by applying thefollowing formula:
P1 = (abs R–sgn R–1) · N + (sgn R–sgn D) · abs MRR22
and
R = 2 · MRR–N

Along with the very fine grating periods,
these processes enable high edge
resolution and excellent homogeneity of
the graduation. In combination with thephotoelectric scanning method, thesecharacteristics are critical for attaining
high-quality output signals.

Definitions:
P1 =	Position of the first traversed
reference mark in signal periods

The master graduations are manufactured
by HEIDENHAIN on custom-built, highprecision dividing engines.

sgn =	Algebraic sign function(“+1” or “–1”)

abs = Absolute value

MRR =	Number of signal periods between
the traversed reference marks

Graduations of absolute linear encoders

Schematic representation of an absolute code structure with an additional
incremental track (LC 485 as example)

8

N=	Nominal increment between two
fixed reference marks in signal
periods (see table below)

D=	Direction of travel (+1 or –1).
Traverse of scanning unit to theright (when properly installed)equals +1

Graduations of incremental linear encoders

Signal period

Nominalincrement N insignal periods

Maximum
traverse

LF

4 µm

5000

20 mm

LS

20 µm

1000

20 mm

LB

40 µm

2000

80 mm

Schematic representation of an incremental graduation with distancecoded reference marks (LS as example)

9

Photoelectric scanning

Most HEIDENHAIN encoders utilize thephotoelectric scanning principle. Photoelec­
tric scanning is touchless and therefore
does not induce wear. This method detects
even extremely fine graduation lines down
to a width of only a few micrometers andgenerates output signals with very small
signal periods.
The finer the grating period of a measuring
standard is, the greater the effect ofdiffraction on photoelectric scanning.
HEIDENHAIN linear encoders employ twoscanning principles:• The imaging scanning principle forgrating periods of 20 µm and 40 µm• The interferential scanning principle
for very fine graduations with grating
periods of, for example, 8 µm.

Imaging scanning principle
Put simply, the imaging scanning principle
uses projected-light signal generation:
two gratings with equal or similar grating
periods—the scale and the scanning
reticle—are moved relative to each other.
The carrier material of the scanning reticle
is transparent, whereas the graduation of
the measuring standard may be applied toa transparent material or to a reflective
material.

Interferential scanning principle
The interferential scanning principle uses
the diffraction and interference of light onfinely divided gratings in order to produce
the signals from which motion ismeasured.
A step grating is used as the measuring
standard: reflective lines with a height of
0.2 µm are applied to a flat, reflective
surface. In front of this is the scanning
reticle—a transparent phase grating withthe same grating period as the scale.

When parallel light passes through a
grating structure, light and dark fields areprojected at a certain distance. At thislocation there is an index grating. When thetwo gratings move relative to each other,
the incident light is modulated: If the gaps
are aligned, light passes through. If thelines of one grating coincide with the gapsof the other, no light passes through. A
photocell array converts these variations inlight intensity into electrical signals. The
specially structured grating of the scanning
reticle filters the light to generate nearlysinusoidal output signals.

When a light wave passes through thescanning reticle, it is diffracted into threepartial waves of the orders +1, 0, and –1,
with nearly equal luminous intensity. The
waves are diffracted by the scale such thatmost of the luminous intensity is found in
the reflected diffraction orders +1 and –1.
These partial waves meet again at thephase grating of the scanning reticle, where
they are diffracted again and interfere. This
produces essentially three waves that leave
the scanning reticle at different angles.
Photocells convert these alternating lightintensities into electrical signals.

The smaller the grating period of thegrating structure is, the closer and more
tightly toleranced the gap must be
between the scanning reticle and thescale.

When there is relative motion between thescale and the scanning reticle, the diffracted
wavefronts undergo a phase shift:
movement by the amount of one grating
period shifts the positive first-orderdiffraction wavefront by one wavelength in
the positive direction, while the negative
first-order diffraction wavefront is displacedby one wavelength in the negative direction.
Since the two waves interfere with eachother upon exiting the phase grating, thesewaves are shifted relative to each other by
two wavelengths. This results in two signal
periods when there is relative motion ofjust one grating period.
Interferential encoders use grating periodsof, for example, 8 µm, 4 µm, or finer.
Their scanning signals are largely free of
harmonics and can be highly interpolated.
These encoders are therefore especiallywell suited for small measuring steps andhigh accuracy.
Sealed linear encoders that use theinterferential scanning principle are given
the designation LF.

The LC, LS, and LB linear encoders use
the imaging scanning principle.

Interferential scanning principle (optical diagram)
C Grating periody Phase shift of the light wave when passing through the scanning reticle
 Phase shift of the light wave due to motion X of the scale

Imaging scanning principle

LED light source
Photocells

Condenser

LED light
sourceCondenser

Scanning reticle
Measuring standard

Scanning reticle

Photocell array

Measuring standard

10

11

Measurement accuracy
Calibration chart

These factors can be subdivided into
encoder-specific position errors andapplication-dependent factors. For
assessment of the attainable overall
accuracy, all of these individual factors
must be taken into account:

Encoder-specific position error
Encoder-specific position error includes• The accuracy of the measuring standard• The interpolation accuracy• The position noise• The quality of the encoder’s mechanicaldesignAccuracy of the measuring standard
The accuracy of the measuring standard isprimarily dictated by the homogeneity of
the graduation.

It is stated as the maximum value of thebaseline error. The distance between themeasuring points is equivalent to theinteger multiple of the signal period. As aresult, interpolation errors have no effect.
The sealed linear encoders are separated
into accuracy grades for easier differentiation.
The accuracy grade a defines the upper
limit of the baseline error within any
section of up to one meter in length. The
baseline error F is ascertained during final
inspection and is indicated on the quality
inspection document.
Interpolation accuracy
The interpolation error already has an effectat very low traversing speeds and during
repeated measurements. This error leads
to fluctuations in the traversing speed,
particularly within the speed control loop.
Within the application, the interpolation
error affects the machining quality, such as
the surface quality.
The interpolation accuracy is primarily
influenced by• The fineness of the signal period• The homogeneity and period resolutionof the graduation• The quality of the scanning filter
structures• The characteristics of the sensors• The quality of the signal processing

Position error 

Accuracy of the measuring standard+uBaseline error

The interpolation accuracy is stated in
the form of a maximum value u of theinterpolation error. Encoders with an analog
interface are tested with an electronic unit
from HEIDENHAIN (e.g., EIB 741).
Position noise
Position noise causes small, random
deviations from the expected value.
Position noise also depends on the qualityof the signal processing. Typically, theposition noise is less than 1  of the signal
period.

Application-dependent
position error
Mounting
Guided linear encoders from HEIDENHAIN
compensate for movements between
the scale and scanning unit that are not in
the direction of movement. This makes
it possible to realize very wide mounting
tolerances with minimal effect on theoverall accuracy.
Influence of temperature
Linear encoders from HEIDENHAIN provide
a defined and repeatable thermal behavior
upon changes in temperature. The coefficientof linear thermal expansion is listed in theencoder specifications.

All HEIDENHAIN linear encoders
are inspected for accuracy and proper
functioning prior to shipping.
The position error is determined fromthe average value of one forward and one
reverse measurement during final
inspection.
The Quality Inspection Document
confirms the stated graduation accuracyof each encoder. The calibration standards
ensure the traceability, as required by
EN ISO 9001, to recognized national orinternational standards.
For the LC 100, LC 400, LF and LS series,
as well as single-section scale tapes, theQuality Inspection Document also docu­
ments the position error ascertained for theentire measuring length. This is stated as thebaseline error F. The measuring parameters
and the measurement uncertainty are also
provided.
Temperature range
The linear encoders are calibrated at areference temperature of 20 °C. The
position error documented in the calibration
chart is valid at this temperature.
The operating temperature range states
the limits of ambient temperature within
which the linear encoder will function
properly.
The storage temperature range of –20 °C
to +70 °C applies when the unit remains in
its packaging. Starting from a measuring
length of 3240 mm, the permissible storage
temperature range for the LC 1x5 encoders
is limited to –10 °C to +50 °C.

Interpolation
error within one
signal period–uPosition 

Position error in µm 

The accuracy of the linear measurement
is mainly determined by• The quality of the graduation• The quality of the graduation carrier• The quality of the scanning process• The quality of the signal processing
electronics• The quality of the encoder mechanics• How the encoder is installed within themachine0,15

Example

0,10
0,05
0
-0,05
-0,10
-0,15
0

Position error Interpolation accuracy
+a

100

200

300
400
500
Position in mm 

Signal period

LC 415 interpolation error:
The diagram above shows the measured interpolation error of an
LC 415 over a measuring range of 500 nm. The area marked red
indicates the maximum interpolation error u.

Interpolation
error–aPosition 

1213

Mechanical design types and mounting guidelines
Linear encoders with small cross section

The LC, LF, and LS slimline linear encoders
should be mounted on a machined surface
over the entire length—particularly for highdynamic requirements. Larger measuring
lengths and a higher vibration load capacity
can be achieved by using a mounting sparor clamping elements (only the LC 400
series).
The slimline linear encoders feature
identical mounting dimensions. This makes
it possible, for example, to exchange anincremental LS or LF for an absolute LC ona specific machine design (please note thatthe measuring length of the LF is smaller
by 20 mm than that of the LC or LS). In
addition, the same mounting spars canalso be used, regardless of the encoder
version (LC, LF, or LS).

LC 415

Accessory:
Mounting and test gauges for slimline
linear encoders
The mounting gauge is used to set the
gap between the scale unit and thescanning unit if the shipping brace needs
to be removed before mounting. The test
gauges are used to quickly and easily
check the gap of the mounted linear
encoder.

LS 487

Along with the standard procedure of using
two M8 screws to mount the scale unit
on a plane surface, there are also othermounting possibilities:

LF 485

Installation with mounting spar
Mounting the encoder with a mounting spar
can be especially beneficial. The mounting
spar can be fastened as part of the machineassembly process. The encoder is thensimply clamped on during final mounting.
Easy exchange also facilitates servicing.
HEIDENHAIN recommends mounting withthe mounting spar when measuring lengths
are greater than 620 mm and dynamic
requirements are high. The mounting spar
is always required for measuring lengths
greater than 1240 mm.

The encoder is mounted such that thesealing lips are directed downward or awayfrom splashing water (also see General
information on page 18).
Thermal characteristics
Because they are rigidly fastened using
two M8 screws, the linear encoders largely
adapt themselves to the mounting surface.
When fastened over the mounting spar,
the encoder is fixed at its midpoint to themounting surface. The flexible fastening
elements ensure reproducible thermal
behavior.
The LF 485 with its graduation carrier ofsteel has the same coefficient of thermal
expansion as a mounting surface of graycast iron or steel.
Mounting
It is surprisingly simple to mount thesealed linear encoders from HEIDENHAIN:
you need only align the scale unit at several
points along the machine guideway. Stopsurfaces or stop pins can also be used forthis. The shipping brace already sets theproper gap between the scale unit andthe scanning unit, as well as the lateral
tolerance. If the shipping brace needs to be
removed before mounting due to a lack ofspace, then the mounting gauge is used to
set the gap between the scale unit and thescanning unit easily and exactly. Lateral
tolerances must also be maintained.

.1

// 0

ID
Mounting gauge
1.0 mm (gray)

737748-01

1211268-01

1211239-01

Test gaugemax. 1.3 mm (red)737748-02

1211268-02

1211239-02

Test gaugemin. 0.7 mm (blue)

737748-03

1211268-03

1211239-03

Mounting spar

For the MSL 41 mounting spar, thecomponents required for clamping arealready preassembled. This mounting spar
is designed for linear encoders with normal
or short end blocks. The LC 400, LF 4x5
and LS 4x7 series can be mounted byeither side to enable a cable outlet at either
end. The MSL 41 mounting spar must beordered separately.

F

Shipping brace

The mounting aid is locked onto themounted spar and therefore simulates anoptimally mounted scanning unit. The
customer’s fastening for the scanning unit
can be easily aligned to it. Then the mounting
aid is replaced by the linear encoder.
Accessory:
MSL 41 mounting spar
ID 770902-xx

Mounting aid fastened to a mounting spar

Mounting aid for scanning unit
ID 753853-01
Mounting with clamping elements
If the cable outlet is to the right, the scanning
unit of the LC 400 series, which is fastenedby its end blocks, can additionally be fixedby clamping elements. This eliminates theneed of a mounting spar for measuring
lengths greater than 620 mm.
Accessory:
Clamping elements
With pin and M5x10 screw
ID 556975-01 (10 per package)

14

15

Linear encoders with large cross section

Mounting the multi-section LC 2x1
and LB 383
The LC 2x1 and LB 383 with measuring
lengths over 3240 mm are mounted on themachine in individual sections:• Mount and align the individual housing
sections• Pull in the scale tape over the entire
length and tension it• Lubricate the sealing lips and pull them in• Insert the scanning unit

The LB, LC, LF, and LS full-size linear
encoders are fastened over their entire
length onto a machined surface. This gives
them a high vibration rating. The obliquearrangement of the sealing lips permits
universal mounting with vertical or
horizontal scale housing with equally highprotection rating.
The LC 1x5 features an optimized sealing
system with two successive pairs ofsealing lips. When cleaned compressed air
is introduced into the scale housing, it
effectively seals the two pairs of sealing
lips against ambient air. This optimallyprotects the interior of the encoder fromcontamination.

Sealing system of the LC 1x5

Adjustment of the scale tape tension
enables linear machine error compensationof up to ±100 µm/m.
Accessory:
Mounting aids
For LC 1x3, LS 1x7
For LC 100 		
For LC 2x1, LB 383

The flow rate is set through a connecting
piece with integrated throttle (see separate
accessories under Protection, page 18).
Thermal characteristics
The thermal behavior of the LB, LC, LF, andLS 100 full-size linear encoders has been
optimized:

The mounting aid is locked onto the scaleunit, simulating an optimally adjusted
scanning unit. The customer’s fastening forthe scanning unit can be easily aligned toit. The mounting aid is then removed andthe scanning unit is attached to themounting bracket.

On the LF, the steel scale is cemented to asteel carrier that is fastened directly to themachine element.
For the multi-section LC 200 and LB, thesteel scale tape is clamped directly onto
the machine element. In this way, theencoders are subject to the same thermalchanges in length as the bearing surface.

Accessory:
Mounting and test gauges for full-size
linear encoders

The LC and LS are fixed to the mounting
surface at their midpoint. The flexible
fastening elements permit reproducible
thermal behavior.
Mounting
It is surprisingly simple to mount thesealed linear encoders from HEIDENHAIN:
you need only align the scale unit at several
points along the machine guideway. Stopsurfaces or stop pins can also be used forthis. The shipping brace already sets theproper gap between the scale unit and thescanning unit. The lateral gap is to be set
during mounting. If the shipping braceneeds to be removed before mounting due
to a lack of space, then the mounting
gauge is used to set the gap between thescale unit and the scanning unit easily andexactly. Lateral tolerances must also be
maintained.

16

ID 547793-02
ID 1067589-02
ID 824039-01

The mounting gauge is used to set the
gap between the scale unit and thescanning unit if the shipping brace needs
to be removed before mounting. The test
gauges are used to quickly and easily
check the gap of the mounted linear
encoder.
Shipping brace

ExampleLC 1xx, LS 1xx

LB 383/LC 2x1

x

ID

x

ID

Mounting gauge (gray)

1.5 mm

575832-11

1.0 mm772141-11

Test gauge max. (red)1.8 mm

575832-12

1.3 mm772141-12

Test gauge min. (blue)

1.2 mm

575832-13

0.7 mm772141-13

Accessory:
Lubricating device
For LC 2x1, LB 383 sealing lips
ID 1104590-05

17

General information

Protection
Sealed linear encoders fulfill the require­ments for IP53 protection according to
EN 60529 or IEC 60529 provided that they
are mounted with the sealing lips facing
away from splash water. If necessary,
provide a separate protective cover. If theencoder is exposed to particularly heavy
concentrations of dust or coolant mist,
sealing air can be used to provide IP64
protection to more effectively prevent the
ingress of contamination. To apply thecompressed air for sealing the housing, the
LB, LC, LF, and LS sealed linear encoders
are therefore equipped with inlets at bothend blocks and on the mounting block of
the scanning unit.
The compressed air introduced directly
into the encoders must be cleaned by amicrofilter and must comply with thefollowing quality classes as per ISO 8573-1(2010 edition):• Solid contaminants:
Class 1
Particle size:
Number ofparticles per m3
0.1 µm to 0.5 µm
 20 000
0.5 µm to 1.0 µm
 400
1.0 µm to 5.0 µm
 10• Max. pressure dew point: Class 4(pressure dew point at 3 °C)• Total oil content:
Class 1
(max. oil concentration 0.01 mg/m3)

For an optimal supply of sealing air to thesealed linear encoders, the required air
flow is 7 l/min to 10 l/min per encoder.
Ideally, the air flow is regulated by the
HEIDENHAIN connecting pieces withintegrated throttle. The throttles ensure
the prescribed flow quantities at an input
pressure of approx. 1 · 105 Pa (1 bar).
On some encoders the throttle is alreadyintegrated in the connection (see theinformation in the technical drawings).
Accessories:
Connecting piece with throttlefor 6 mm x 1 mm pressure tubing:
For connection to thelinear encoder end block
ID 226270-02
For connection to thescanning unit
ID 275239-01
Also suitable:
Swiveling screw fitting 90°
With seal
On full-size linear encoders it can beconnected only to the encoder housing.
ID 207834-02

Accessory:
DA 400 compressed air unit
ID 894602-01
DA 400HEIDENHAIN offers the DA 400
compressed-air filter system for purifying
the compressed air. It is designed
specifically for conducting compressed air
into encoders.
The DA 400 consists of three filter stages(prefilter, microfilter, and activated carbon
filter) and a pressure regulator with amanometer. The sealing air function can beeffectively monitored using a manometerand pressure switch (available as anaccessory).
The compressed air introduced into the
DA 400 must fulfill the requirements of thefollowing purity classes as per ISO 8573-1(2010 edition):• Solid contaminants:
Particle size:

Class 5
Number ofparticles per m3
0.1 µm to 0.5 µm
Not specified
0.5 µm to 1.0 µm
Not specified
1.0 µm to 5.0 µm
 100 000
• Max. pressure dew point: Class 6(pressure dew point at 10 °C)• Total oil content:
Class 4(max. oil concentration 5 mg/m3)

Mounting
To simplify cable routing, the mounting
block of the scanning unit is usuallyscrewed onto a stationary machine part,and the scale housing on the moving part.
The mounting location for the linear
encoders should be carefully considered inorder to ensure both optimum accuracy
and the longest possible service life.
• The encoder should be mounted as
closely as possible to the working plane
to keep the Abbe error small.
• To function properly, linear encoders
must not be continuously subjected tostrong vibration; the more solid partsof the machine tool provide the best
mounting surface in this respect.
Encoders should not be mounted onhollow parts or with adapters. A mounting
spar is recommended for sealed linear
encoders with small cross section.
• In order to avoid temperature effects, thelinear encoders should not be mounted
in close proximity to heat sources.
• During cable routing, the minimum bend
radius for fixed installation or for frequentflexing must be observed (see table).
• Both the scanning unit and the scale
housing are to be connected with low
resistance (< 1 ) to functional earth.
Cable assembly
Accessory:1/4” socket wrench
The socket wrench makes it possible tomount the encoder connector to theadapter cable when space is limited.
ID 618965-02

Required moving force
The required moving force stated is the
maximum force required to move the scale
unit relative to the scanning unit.
Acceleration
Linear encoders are subject to various
types of acceleration during operation andmounting.
• The abovementioned extreme values
for the vibration tolerance apply tofrequencies of 55 Hz to 2000 Hz(EN 60068-2-6), except when mechanicalresonances occur. Comprehensive
testing of the entire system istherefore required.
• The maximum permissible acceleration
values (semi-sinusoidal shock) forshock and impact are valid for 11 ms(EN 60068-2-27). Under no circumstances
should a hammer or similar implement
be used to adjust or position theencoder.
RoHS
HEIDENHAIN has tested its products toensure the use of non-hazardous materials
in accordance with the European Directives
2002/95/EC (RoHS) and 2002/96/EC (WEEE).
For a Manufacturer’s Declaration on RoHS,
please consult your sales agency.
Parts subject to wear
Encoders from HEIDENHAIN are designed
for a long service life. Preventive maintenanceis not required. However, they do containcomponents that are subject to wear,
depending on the application and how they
are deployed. This especially applies tocables that are subjected to frequent flexing.
Other parts subject to wear are thebearings in encoders with integral bearing,
the radial shaft seal rings in rotary encoders
and angle encoders, and the sealing lips onsealed linear encoders.

Mounting
The steps and dimensions that must
be complied with during mounting are
specified solely in the mounting
instructions supplied with the device.
All mounting-related information in thisbrochure is therefore provisional andnon-binding; it does not become part ofa contract.

Further information:
Please also comply with the following
documents for planning and mounting:• Brochure: Cables and Connectors• Brochure: Interfaces of HEIDENHAIN
Encoders• Mounting instructions for therespective encoder• Mounting instructions for encoder
cables and adapter cables¬ 3.7 mm

¬ 4.5 mm

¬ 6.0 mm
¬ 6.8 mm

¬ 6.6 mm
¬ 10 mm¬ 8.0 mm

 8 mm 10 mm

 20 mm

 35 mm

R1  40 mm

 40 mm

 50 mm

 75 mm

 75 mm

R2  100 mm

Further information:
For further information, ask for our
DA 400 Product Information document.

System tests
Encoders from HEIDENHAIN are usually
integrated as components into complete
systems. Applications of this typerequire full-system, comprehensive
testing, regardless of the encoder’sspecifications.
The specifications shown in thisbrochure apply to the specific encoder,
not to the complete system. Any
operation of the encoder outside of thespecified range or outside of its properand intended use is at the user’s own
risk.

T  -40 °C

T  –10 °C

DA 40018

Minimum bend radii for rigid configuration or for frequent flexing

19

Functional safety

Safe axes
Driven axes on machine tools usually
represent a significant hazard for humans.
It must be ensured that the machine does
not make any uncontrolled movements,
especially when a person is interactingwith the machine (e.g., workpiece setup).
This requires position information about theaxes for proper implementation of safetyfunction. As an evaluating safety module,
the control has the task of detecting faulty
position information and reacting to it
accordingly.
Various safety strategies can be pursued,
depending on the topology of the axis andthe evaluation capabilities of the control. Ina single-encoder system, for example, only
one encoder per axis is evaluated for thesafety function. However, on axes with two
encoders, such as a linear axis with a rotary
and a linear encoder, the two redundant
position values can be compared with eachother in the control.
Safe fault detection can be ensured only
if the two components—control andencoder—are properly adapted to one
another. It must be noted that the safety

designs of control manufacturers differ
from one another. As a result, the require­ments to be fulfilled by the connectedencoders may also differ to an extent.
Type-examined encoders
Sealed linear encoders from HEIDENHAIN
are used successfully on a variety of controls
in widely differing safety designs. This applies
particularly to the type-examined encoders
LC 1x5/LC 4x5 with EnDat and DRIVE-CLiQ
interfaces. The encoders can be operated
as single-encoder systems in conjunction
with a suitable control in applications withthe control category SIL 2 (according to
EN 61508) or performance level “d” (ofEN ISO 13849). Unlike incremental encoders,the absolute LC 1x5/LC 4x5 linear encoders
always provide a safe absolute position
value—including immediately after switch-on
or a power failure. Reliable position trans­mission is based on two independently
generated absolute position values and on
error bits provided to the safe control. The
purely serial data transmission also provides
other benefits, including greater reliability,
improved accuracy, diagnostic capabilities,
and reduced costs through simpler
connection technology.

Standard encoders
In addition to those encoders explicitly
qualified for safety applications, standard
encoders (e.g., with Fanuc interface or
1 VPP signals) can also be used in safe
axes. In such cases, the characteristics ofthe encoders must be matched to therequirements of the respective control.
For this purpose, HEIDENHAIN can provide
additional data about the individual
encoders (failure rate, fault model as per
EN 61800-5-2).

Fault exclusion for the loosening of themechanical connection
Irrespective of the interface, many safety
designs require the safe mechanicalconnection of the encoder. The standard
for electric motors, EN 61800-5-2, requiresthat the loosening of the mechanicalconnection between the encoder and the
motor be considered as a fault. Since itcannot be guaranteed that the control willdetect such errors, fault exclusion is requiredin many cases. The requirements on fault
exclusion can result in additional constraints
in the permissible limit values in the specifi­
cations. In addition, fault exclusions forthe loosening of the mechanical coupling
usually require additional measures during
installation of the encoder or in the eventof servicing (e.g., anti-rotation lock forscrews). These factors must be considered
for the selection of a suitable encoder or
mounting mode.

Service life
Unless otherwise specified, HEIDENHAIN
encoders are designed for a service life of
20 years (as per ISO 13849).
Mounting

Further information:
The safety-related characteristic values
are listed in the encoder specifications.
These characteristic values are explainedin the Technical Information document
Safety-Related Position Encoders.
Upon request, HEIDENHAIN can likewise
provide additional data about the individual
products (failure rate, fault model as per
EN 61800-5-2) for the use of standard
encoders in safety-related applications.

2)

Fault exclusion for LC 1x5 andLC 4x5 series
There are various mounting options for the
LC 1x5/LC 4x5 encoders that offer fault
exclusion for the loosening of the mechanicalconnection. The fault exclusion applies for
all LC 4x5 and LC 1x5 encoders, regardlessof the interface.

Fastening

Safe position for themechanical connection1)

Limitation of
specifications

M6 ISO 4762 8.8/A70

±0 µm

No

Mounting options I and II

M6 ISO 4762 8.8/A70

±0 µm

No

Mounting option I
12A end blocks for M8

M8 ISO 4762 8.8/A70
M8 DIN 6912 8.8

±0 µm

No

Mounting option III
MSL 41 mounting spar
ID 770902-xx

M6 ISO 4762 8.8/A70±0 µm

For acceleration inmeasuring directionof up to 60 m/s2

All mounting options

M6 ISO 4762 8.8/A70

±0 µm

No

LC 1x5
Housing
Scanning unit
LC 4x5
Housing

Electrical connection

Scanning unit

Mechanical connection

All of the information provided on screw connections assumes a mounting temperature of 15 °C to 35 °C.
1)Fault exclusions are given only for the explicitly mentioned mounting options
2)
A suitable anti-rotation lock must be used for the screw connections (in the case of mounting/servicing)

Encoder

Further information:
Safe control

Adhere to the information in the following documents to ensure the correct and intended
operation of the encoder:• Operating Instructions LC 115		
1382648
LC 195 S		
1382643
LC 415
		

Encoder with mechanical connection and electrical interface(14A end block)(12A end block)13826311382647

LC 495 S (14A end block)		(12A end block)13826401382650• Technical Information: Safety-Related Position Measuring Systems

596632For implementation in a control:• Specifications for Safe Control				

533095

DRIVE-CLiQ is a registered trademark of SIEMENS AG.

20

21

LC 400 series
Absolute linear encoders with slimline scale housing• For limited installation space• LC 416/LC 496 with optimized scanning (see Product Information document 1327049)

Specifications

LC 415

LC 415

Measuring standard
Coefficient of linear expansion

DIADUR glass scale with absolute track and incremental track; grating period: 20 µm
–6 –1
–6 –1
Þtherm  8 · 10 K (mounting type Ô/Õ); with mounting spar: Þtherm  9 · 10 K (mounting type )Accuracy grade*±3 µm, ±5 µm

Measuring length (ML)*in mm

Mounting spar* or clamping elements* up to ML 1240 optional; necessary for ML 1340 or greater
70
120170	 220	 270	 320	 370	 420	 470	 520	 570	 620	 670	 720
770
820
920
1020 1140 1240 1340 1440 1540 1640 1740 1840 2040

Functional safety
for applications with up to• SIL 2, as per EN 61508 (further basis for testing:
IEC 61800-5-3)• Category 3, PL “d” as per EN ISO 13849-1:2015

PFH (per axis)

 15 · 10(up to 2000 m above sea level)–

Safe position1)

Encoder: ±550 μm (safety-related measuring step
SM = 220 μm)––9

LC 485–

Mechanical connection: fault exclusions for the loosening of the housing and scanning unit (page 21)
Interface

EnDat 2.2

Ordering designation

EnDat22

EnDat02

Measuring
step		

0.001 µm
0.010 µm

0.005 µm
0.010 µm

 16 MHz ( 5 µs)

 2 MHz ( 5 µs)

At ±3 µm
At ±5 µm

Clock frequency(calculation time tcal)

Measurement of direct-drive With EIB 5211 or EIB 5181
2)
motor temperatureWith EIB 5281 or
EIB 5181

Incremental signals–» 1 VPP (20 µm)

Cutoff frequency –3 dB–

 150 kHzElectrical connection

Separate adapter cable (1 m/3 m/6 m/9 m) connectable on mounting block

Cable length 100 m3)

Supply voltage

DC 3.6 V to 14 V

 150 m3)

Power consumption (maximum) 3.6 V:  1.1 W; 14 V:  1.3 W

ML

70

120

170

220

270

320

370

420

470

520

570

620

670

720

770

820

920 1020 1140 1240 1340 1440 1540 1640 1740 1840 2040

L

37.5

55

75

100

115

140

175

200

225

250

275

300

325

350

375

400

450

500

555

610

655

710

760

810

855

 = 12A end block; for mounting with and without mounting spar
 =1
 4A end block; for mounting with mounting spar
(if directly attached with M4 screws, then specifications are subject to constraints)
 = MSL 41 mounting spar
F = Machine guideway
P = Measuring points for alignmentⓀ = Required mating dimensionsⒹ = Compressed air inletⓈ = Beginning of measuring length ML (= 20 mm absolute)ð = Direction of motion of the scanning unit for ascending position values

22

910 1010

2

Traversing speed

 180 m/min (max. acceleration in measuring direction  100 m/s )Required moving force

5N

Vibration 55 Hz to 2000 Hz
acting on
Shock 11 ms

Scanning unit:  200 m/s (EN 60068-2-6)
Housing without mounting spar:  100 m/s2 (EN 60068-2-6)
Housing with mounting spar and cable outlet on the right:  150 m/s2, or left:  100 m/s2 (EN 60068-2-6)
 300 m/s2 (EN 60068-2-27)

Operating temperature

0 °C to 50 °C

4)

2

Protection EN 60529

IP53 when installed in conformity with instructions in the brochure; IP64 with sealing air from DA 400

Mass

Encoder: 0.2 kg + 0.55 kg/m of measuring length; mounting spar: 0.9 kg/m

1)
* Please select when ordering; Further tolerances may arise in the downstream electronics after position value comparison (contact mfr.
2)
of downstream electronics); Depending on the serial number index of the encoder; please consult HEIDENHAIN; 3) With HEIDENHAIN
cable (see the Interfaces of HEIDENHAIN Encoders brochure); 4) In the application, protect the LC from the ingress of particles and liquids23

LC 400 series
Absolute linear encoders with slimline scale housing• For limited installation space• LC 416/LC 496 with optimized scanning (see Product Information document 1327049)

Specifications

LC 495 S

Measuring standard
Coefficient of linear expansion

DIADUR glass scale with absolute track and incremental track; grating period: 20 µm–6 –1Þtherm  8 · 10 K (mounting mode Ô/Õ);with mounting spar: Þtherm  9 · 10–6 K–1 (mounting mode )

Accuracy grade*±3 µm, ±5 µm

Measuring length (ML)* in mm

Mounting spar* or clamping elements* optional up to ML 1240, required as of ML 1340
70
120
170
220
270
320
370
420
470
520
570
620
670

Functional safety
for applications with up to• SIL 2 as per EN 61508• Category 3, PL “d” as per
EN ISO 13849-1:2015

PFH (per axis)

25 · 10(up to 1000 m above sea level NN)–

Safe position1)

Encoder: ±550 μm (safety-related measuring
step SM = 220 μm)––9LC 495 S

LC 495 F

720

770

LC 495 M

820

920

1020

1140

1240

1340

LC 495 P

1440

1540

1640

1740

1840

2040

–

Mechanical connection: fault exclusions for the loosening of the housing and scanning unit (page 21)
Interface

DRIVE-CLiQ

Fanuc Serial Interface/Þi interface

Mitsubishi high speed interface

Panasonic Serial Interface

Ordering designation

DQ01

Fanuc05

Mit03-04

Pana010.001 µm
0.010 µm

Þi interface/Þ interface
0.00125 µm/0.010 µm
0.0125 µm/0.050 µm

0.001 µm
0.010 µm

With EIB 5211–

 30 mMeasuring step
				
				

At ±3 µm
At ±5 µm

Clock frequency (calculation time tcal)–

Measurement of direct-drive2)
motor temperature–

Electrical connection

Separate adapter cable (1 m/3 m/6 m/9 m) connectable on mounting block

Cable length 30 m 50 mSupply voltage

DC 10 V to 28.8 V

DC 3.6 V to 14 V

Power consumption (maximum)

10 V:  1.5 W; 28.8 V:  1.7 W

3.6 V:  1.1 W; 14 V:  1.3 W

Traversing speed

 180 m/min (max. acceleration in measuring direction  100 m/s2)

Required moving force

5N

Vibration 55 Hz to 2000 Hz
acting on
Shock 11 ms

Scanning unit:  200 m/s (EN 60068-2-6)
Housing without mounting spar:  100 m/s2 (EN 60068-2-6)
Housing with mounting spar and cable outlet on the right:  150 m/s2,
or left:  100 m/s2 (EN 60068-2-6)
 300 m/s2 (EN 60068-2-27)

Operating temperature

0 °C to 50 °C

3)

4)

2

Protection EN 60529

IP53 when installed in conformity with instructions in the brochure;
IP64 with sealing air from DA 400

Mass

Encoder: 0.2 kg + 0.55 kg/m of measuring length; mounting spar: 0.9 kg/m

* Please select when ordering
1)
Further tolerances may arise in the downstream electronics after position value comparison (contact mfr. of the downstream electronics)
2)
Depending on the serial number index of the encoder; please consult HEIDENHAIN
3)Greater cable lengths upon request
4)
In the application, the LC must be protected from the ingress of particles and liquids24

 50 m25

LC 100 series
Absolute linear encoders with full-size scale housing• High vibration tolerance• Flat-lying installation possible• High reliability through double sealing lips
• LC 116/LC 196 with optimized scanning (see Product Information document 1327049)

Specifications

LC 115

LC 115

LC 185

Measuring standard
Coefficient of linear expansion

DIADUR glass scale with absolute track and incremental track; grating period: 20 µm–6 –1Þtherm  8 · 10 K

Accuracy grade*±3 µm up to a measuring length of 3040 mm; ±5 µm

Measuring length (ML)*in mm

140	 240	 340	 440	 540	 640	 740	 840	 940 1040 1140 1240 1340 1440
1540 1640 1740 1840 2040 2240 2440 2640 2840 3040 3240 3440 3640 3840
4040 4240

Functional safety
for applications with up to• SIL 2, as per EN 61508 (further basis for testing:
IEC 61800-5-3)• Category 3, PL “d” as per EN ISO 13849-1:2015–

PFH (per axis)–9
15 · 10 ;ML > 3040 mm: 25 · 10–9 (up to 2000 m above sea level)–

Safe position1)

Encoder: ±550 μm;
ML > 3040 mm: ±2050 µm (safety-related measuring
step SM = 220 μm)–

Mechanical connection: fault exclusions for the loosening of the housing and scanning unit (page 21)
Interface

EnDat 2.2

Ordering designation

EnDat22

EnDat02

Measuring
step		

0.001 µm
0.010 µm

0.005 µm
0.010 µm

At ±3 µm
At ±5 µm

Clock frequency (calc. time tcal)  16 MHz ( 5 µs)

 2 MHz ( 5 µs)

Measurement of direct-drive With EIB 5211 or EIB 5181
2)
motor temperatureWith EIB 5281 or
EIB 5181

Incremental signals–» 1 VPP (20 µm)

Cutoff frequency –3 dB–

 150 kHzElectrical connection

Separate adapter cable (1 m/3 m/6 m/9 m), connectable at either end of mounting block

Cable length 100 m3)

Supply voltage

DC 3.6 V to 14 V

 150 m3)

Power consumption (maximum) 3.6 V:  1.1 W; 14 V:  1.3 W  = Mounting options
F = Machine guideway
P = Measuring points for alignmentⓀ = Required mating dimensionsⒶ = Alternative mating dimensionsⒷ = Cable connection usable at either endⒹ = Compressed-air inlet usable at either endⓉ = Mechanical fixed point (to be preferred)Ⓗ = Mechanical fixed point (compatible with predecessor model)Ⓖ = Mechanical fixed point (repeated at an interval of 100 mm)Ⓢ = Beginning of measuring length ML (= 20 mm absolute)Ⓦ = Mating surfaces
ð = Direction of motion of the scanning unit for ascending position values

26

2

Traversing speed

 180 m/min (max. acceleration in measuring direction  100 m/s )Required moving force

4N

Vibration 55 Hz to 2000 Hz
acting on
Shock 11 ms

Housing:  200 m/s (EN 60068-2-6)
Scanning unit:  200 m/s2 (EN 60068-2-6)
 300 m/s2 (EN 60068-2-27)

Operating temperature

0 °C to 50 °C

4)

2

Protection EN 60529

IP53 when installed in conformity with instructions in the brochure; IP64 with sealing air from DA 400

Mass

0.55 kg + 2.9 kg/m of measuring length1)* Please select when ordering; Further tolerances may arise in the downstream electronics after position value comparison (contact mfr.
2)
of downstream electronics); Depending on the serial number index of the encoder; please consult HEIDENHAIN; 3) With HEIDENHAIN
cable (see the Interfaces of HEIDENHAIN Encoders brochure); 4) In the application, protect the LC from the ingress of particles and liquids27

LC 100 series
Absolute linear encoders with full-size scale housing• High vibration tolerance• Flat-lying installation possible• High reliability through double sealing lips
• LC 116/LC 196 with optimized scanning (see Product Information document 1327049)

Specifications

LC 195 S

Measuring standard
Coefficient of linear expansion

DIADUR glass scale with absolute track and incremental track; grating period: 20 µm–6 –1Þtherm  8 · 10 K

Accuracy grade*±3 µm up to a measuring length of 3040 mm; ±5 µm

Measuring length ML* in mm

140

Functional safety
for applications with up to• SIL 2 as per EN 61508• Category 3, PL “d” as per
EN ISO 13849-1:2015–

PFH (per axis)–9–925 · 10 ; ML > 3040 mm: 40 · 10
(up to 1000 m above sea level)–

Safe position1)

Encoder: ±550 μm; ML > 3040 mm: ±2050 µm(safety-related measuring step SM = 220 μm)–

240

LC 195 S

340

440

540

640

740

840

LC 195 F

940

1040

1140

1240

1340

1440

1540

1640

1740

1840

LC 195 M

LC 195 P±3 µm up to a measuring length of2040 mm; ±5 µm±3 µm up to a measuring length of3040 mm; ±5 µm

2040 2240 2440 2640 2840 3040 3240 3440 3640 3840 4040 4240

Mechanical connection: fault exclusions for the loosening of the housing and scanning unit (page 21)
Interface

DRIVE-CLiQ

Fanuc Serial Interface/Þi interface

Mitsubishi high speed interface

Panasonic Serial Interface

Ordering designation

DQ01

Fanuc05

Mit03-04

Pana010.001 µm
0.010 µm

Þi interface/Þ interface
0.00125 µm/0.010 µm
0.0125 µm/0.050 µm

0.001 µm
0.010 µm

With EIB 5211–

 30 mMeasuring step
				
				

At ±3 µm
At ±5 µm

Clock frequency (calculation time tcal)–

Measurement of direct-drive2)
motor temperature–

Electrical connection

Separate adapter cable (1 m/3 m/6 m/9 m), connectable at either end of mounting block

Cable length 30 m 50 mSupply voltage

DC 10 V to 28.8 V

DC 3.6 V to 14 V

Power consumption (maximum)

10 V:  1.5 W; 28.8 V:  1.7 W

3.6 V:  1.1 W; 14 V:  1.3 W

Traversing speed

 180 m/min (max. acceleration  100 m/s2)

Required moving force

4N

Vibration 55 Hz to 2000 Hz
acting on
Shock 11 ms

Housing:  200 m/s (EN 60068-2-6)
Scanning unit:  200 m/s2 (EN 60068-2-6)
 300 m/s2 (EN 60068-2-27)

Operating temperature

0 °C to 50 °C

3)4)

 50 m2

Protection EN 60529

IP53 when installed in conformity with instructions in the brochure;
IP64 with sealing air from DA 400

Mass

0.55 kg + 2.9 kg/m of measuring length* Please select when ordering
1)
Further tolerances may arise in the downstream electronics after position value comparison (contact mfr. of downstream electronics)
2)
Depending on the serial number index of the encoder; please consult HEIDENHAIN
3)Greater cable lengths upon request
4)
In the application, protect the LC from the ingress of particles and liquids28

29

LC 200 series up to 4240 mm (single-section housing)Absolute linear encoders with full-size scale housing• Measuring length up to 4240 mm• Flat-lying installation possible• Also available in mirrored version (mating dimensions upon request)• Thermal behavior varies depending on the mounting option being used, ,
 = Mounting options
F = Machine guidewayⓀ = Required mating dimensionsⒷ = Cable connection usable at either endⒹ = Compressed-air inlet with integrated throttle usable at either endⒺ = Fixed stop
Ⓖ = Clamping screw for scale tape
Ⓢ = Beginning of measuring length ML (= 100 mm absolute)Ⓦ = Mating surfaces
ð = Direction of motion of the scanning unit for ascending position values

30

Specifications

LC 211

LC 281

Measuring standard
Coefficient of linear expansion

METALLUR steel scale tape with absolute track and incremental track, grating period: 40 µm–6 –1Þtherm  10 · 10 K

Accuracy grade±5 µm

Measuring length ML* in mm

440	 640	 840 1040 1240 1440 1640
3240 3440 3640 3840 4040 4240

1840

Interface

EnDat 2.2

Fanuc Serial Interface
Þi interface

Mitsubishi high speed
interface

Ordering designation

EnDat22

Fanuc05

Mit03-04

Measuring step

0.010 µm

Þi interface/Þ interface
0.0125 µm/0.050 µm

0.010 µm

Diagnostics interface

DigitalClock frequency
Calculation time tcal

 16 MHz 5 µs

 2 MHz 5 µs––Measurement of direct-drive
motor temperature–With EIB 5281 or
EIB 5181–

Incremental signals–» 1 VPP–

Signal period

–

40 µm

–

Cutoff frequency –3 dB–

 250 kHz–Electrical connection

Separate adapter cable (1 m/3 m/6 m/9 m), connectable at either end of mounting block

Cable length1)

 100 m (at clock
frequency  8 MHz)

Supply voltage

DC 3.6 V to 14 V

Power consumption (max.)

At 14 V:  1.3 W
At 3.6 V:  1.1 W

Current consumption (typical)

At 5 V: 225 mA (without load)

Traversing speed

 180 m/min (max. acceleration in measuring direction  100 m/s2)

Required moving force 15 N

Vibration 55 Hz to 2000 Hz
acting on
Shock 11 ms

Housing: 200 m/s (EN 60068-2-6)
Scanning unit: 300 m/s2 (EN 60068-2-6)
 300 m/s2 (EN 60068-2-27)

Operating temperature

0 °C to 50 °C

Protection EN 60529

IP53 when installed according to mounting instructions, IP64 with sealing air from DA 400

Mass

1.3 kg + 3.6 kg/m of measuring length

EnDat02

 150 mLC 291 F

LC 291 M

2040 2240 2440 2640 2840 3040

 50 m 30 m2* Please select when orderingWith HEIDENHAIN cable1)

31

LC 200 series up to 28 040 mm (multi-section housing)Absolute linear encoders with full-size scale housing• Measuring lengths up to 28 m
• Simplified mounting (upright or flat)• Also available in mirrored version (mating dimensions upon request)

Specifications

LC 211

LC 281

LC 291 F

LC 291 M

Measuring standard
Coefficient of linear expansion

METALLUR steel scale tape with absolute track and incremental track, grating period: 40 µm
Same as machine main casting

Accuracy grade

±5 µm
2)

Measuring length ML* in mm 3240 mm to 28 040 mm in steps of 200 mm
Kit with single-section METALLUR steel scale tape and housing sections, , = Mounting options
F = Machine guideway
L = Housing section lengthsⓀ = Required mating dimensionsⒷ = Cable connection usable at either endⒹ = Compressed-air inlet usable at either endⓈ = Beginning of measuring length ML (= 100 mm absolute)Ⓦ = Mating surfaces
ð = Direction of motion of the scanning unit for ascending position values

32

Interface

EnDat 2.2

Ordering designation

EnDat22

Measuring step

0.010 µm

Diagnostics interface

DigitalClock frequency
Calculation time tcal

 16 MHz 5 µs

 2 MHz 5 µs––Measurement of direct-drive
motor temperature–With EIB 5281 or
EIB 5181–

Incremental signals–» 1 VPP–

Signal period

–

40 µm

–

Cutoff frequency –3 dB–

 250 kHz–Electrical connection

Separate adapter cable (1 m/3 m/6 m/9 m), connectable at either end of mounting block

Cable length1)

 100 m (at clock
frequency  8 MHz)

Supply voltage

DC 3.6 V to 14 V

Power consumption (max.)

At 14 V:  1.3 W
At 3.6 V:  1.1 W

Current consumption (typical)

At 5 V: 225 mA (without load)

Traversing speed

 180 m/min (max. acceleration in measuring direction  100 m/s2)

Required moving force 15 N

Vibration 55 Hz to 2000 Hz
acting on
Shock 11 ms

Housing: 200 m/s (EN 60068-2-6)
Scanning unit: 300 m/s2 (EN 60068-2-6)
 300 m/s2 (EN 60068-2-27)

Operating temperature

0 °C to 50 °C

Protection EN 60529

IP53 when installed according to mounting instructions, IP64 with sealing air from DA 400

Mass

1.3 kg + 3.6 kg/m of measuring length

EnDat02

 150 mFanuc Serial Interface
Þi interface

Mitsubishi high speed
interface

Fanuc05

Mit03-04

Þi interface/Þ interface
0.0125 µm/0.050 µm

0.010 µm

 50 m 30 m2* Please select when orderingWith HEIDENHAIN cable2)
LC 291 M up to 20 040 mm
1)

33

LF 485

LF 485 without mounting spar

Incremental linear encoder with slimline scale housing• Very high repeatability• Thermal behavior similar to steel or gray cast iron
• For limited installation space

LF 485 with mounting spar

Specifications

LF 485

Measuring standard
Coefficient of linear expansion

SUPRADUR phase grating on steel, grating period: 8 µm
–6 –1Þtherm  10 · 10 K

Accuracy grade*±5 µm; ±3 µm

Measuring length ML* in mm Mounting spar* optional
50
100
150	 
200	 
250	 
300 350750
800
9001000 1120 1220
Interface» 1 VPP

Signal period

4 µm

Reference marks*

LF 485
LF 485 C

Diagnostics interface
Cutoff frequency

400

450

500

550

600

650

700

• One reference mark at midpoint of measuring length• Two reference marks, each 25 mm (for ML  1000 mm) or 35 mm (for ML  1120 mm) from the
beginning and end of the measuring length
Distance-coded
Analog–3 dB

 250 kHzElectrical connection

Separate adapter cable (1 m/3 m/6 m/9 m) connectable on mounting block

Cable length 150 m (with HEIDENHAIN cable)

Supply voltage without load

DC 5 V ±0.25 V/< 150 mA

Traversing speed 60 m/min (max. acceleration in measuring direction  100 m/s2)

Required moving force

4N

Vibration 55 Hz to 2000 Hz
acting on
Shock 11 ms

Housing with mounting spar:  150 m/s (EN 60068-2-6)
Scanning unit:  200 m/s2 (EN 60068-2-6)
 300 m/s2 (EN 60068-2-27)

Operating temperature

0 °C to 50 °C

Protection class EN 60529

IP53 when installed according to instructions in the brochure
IP64 with sealing air from DA 400

Mass

0.4 kg + 0.6 kg/m of measuring length2* Please select when ordering = 12A end block; for mounting with andwithout mounting spar
 = 11A end block;for mounting withmounting spar
 = Mounting spar MSL 41
F = Machine guideway
P = Measuring points for alignmentⓀ = Required mating dimensions

34Ⓡ = Reference mark position on LF 485
Two reference marks for measuring lengths
50 ... 1000

1120 ... 1220

z = 25 mm
zi = ML – 50 mm

z = 35 mm
zi = ML – 70 mmⒸ = Reference mark position on LF 485 CⒹ = Compressed air inletⓈ = Beginning of measuring length (ML)
ð = Direction of motion of the scanning unit forascending position values35

LF 185
Incremental linear encoder with full-size scale housing• Very high repeatability• Thermal behavior similar to steel or gray cast iron
• Flat-lying installation possible

Specifications

LF 185

Measuring standard
Coefficient of linear expansion

SUPRADUR phase grating on steel, grating period: 8 µm
–6 –1Þtherm  10 · 10 K

Accuracy grade*±3 µm; ±2 µm

Measuring length (ML)*in mm

140	 240	 340	 440	 540	 640	 740	 840	 940 1040 1140
1540 1640 1740 1840 2040 2240 2440 2640 2840 3040

Interface» 1 VPP

Signal period

4 µm

Reference marks*

LF 185
LF 185 C

Diagnostics interface
Cutoff frequency



1240

1340

1440

One reference mark at midpoint; other reference mark positions upon request
Distance-coded
Analog–3 dB

 250 kHzElectrical connection

Separate adapter cable (1 m/3 m/6 m/9 m) connectable on mounting block

Cable length 150 m (with HEIDENHAIN cable)

Supply voltage without load

DC 5 V ±0.25 V/< 150 mA

Traversing speed 60 m/min (max. acceleration in measuring direction  100 m/s2)

Required moving force

4N

Vibration 55 Hz to 2000 Hz
acting on
Shock 11 ms

Housing:  150 m/s (EN 60068-2-6)
Scanning unit:  200 m/s2 (EN 60068-2-6)
 300 m/s2 (EN 60068-2-27)

Operating temperature

0 °C to 50 °C

Protection class EN 60529

IP53 when installed according to instructions in the brochure
IP64 with sealing air from DA 400

Mass

0.8 kg + 4.6 kg/m of measuring length2* Please select when orderingÔ, Õ, = Mounting options
F = Machine guideway
P = Measuring points for alignment
ML = Measuring lengthⓀ = Required mating dimensionsⒶ = Alternative mating dimensionsⒷ = Cable connection usable at either endⒹ = Compressed-air inlet usable at either endⓈ = Beginning of measuring length (ML)Ⓡ = Reference mark position on LF 185Ⓒ = Reference mark position on LF 185 CⓌ = Mating surfaces① = Not an alternative mating dimension, as opposed to LS/LC 100
ð = Direction of motion of the scanning unit for ascending position values

3637

LS 400 series

LS 4x7 without mounting spar

Incremental linear encoders with slimline scale housing• For limited installation space

LS 4x7 with mounting spar

Specifications

LS 487

Measuring standard
Coefficient of linear expansion

Glass scale with DIADUR grating, grating period: 20 µm
–6 –1
–6 –1
Þtherm  8 · 10 K (mounting type Ô/Õ); with mounting spar: Þtherm  9 · 10 K (mounting type )Accuracy grade*±5 µm; ±3 µm

Measuring length (ML)*in mm

Mounting spar* optional up to ML 1240, required as of ML 1340
70
120170	 220	 270	 320	 370	 420	 470	 520	 570	 620	 670	 720
770
820
920
1020 1140 1240 1340 1440 1540 1640 1740 1840 2040

Reference marks*• Selectable with magnets every 50 mm• One reference mark at midpoint of measuring length• Two reference marks, each 35 mm (for ML  1020 mm) or 45 mm (for ML  1140 mm) from the
beginning and end of the measuring length
Distance-coded

LS 4x7LS 4x7 C

For mounting options,see mounting instructions(www.heidenhain.com).

 = 09A end block; for mounting with andwithout mounting spar
 = 10A end block; for mounting withmounting spar
 = MSL 41 mounting spar
F = Machine guideway
P = Measuring points for alignmentⓀ = Required mating dimensions

38Ⓡ = Reference mark position on LS 4x7
Two reference marks for measuring lengths
70 ... 1020

1140 ... 2040

z = 35 mm
zi = ML – 70 mm

z = 45 mm
zi = ML – 90 mm

LS 477

Interface» 1 VPP TTLIntegrated interpolation*
Signal period

–
20 µm

5-fold–Diagnostics interface

Analog– 160 kHz–Scanning frequency*
Edge separation a–

100 kHz 0.5 µs

Measuring step

Depends on interpolation

1 µm1)

Electrical connection

Separate adapter cable (1 m/3 m/6 m/9 m) connectable on mounting block

Cable length2)

 150 m 100 mSupply voltage without load

DC 5 V ±0.25 V/< 120 mA

DC 5 V ±0.25 V/< 140 mA

Traversing speed

 120 m/min

 120
m/min

Required moving force

5N

Vibration 55 Hz to 2000 Hz
Shock 11 ms
Acceleration

Without mounting spar:  100 m/s (EN 60068-2-6)
With mounting spar, cable outlet at right:  200 m/s2, left: 100 m/s2 (EN 60068-2-6)
 300 m/s2 (EN 60068-2-27)
 100 m/s2 in measuring direction

Operating temperature

0 °C to 50 °C

Protection EN 60529

IP53 when installed according to mounting information and instructions
IP64 with compressed air from DA 400

Mass

0.4 kg + 0.5 kg/m of measuring length

Cutoff frequency–3 dB

50 kHz 1 µs10-fold–

20-fold–––

100 kHz 50 kHz
 0.25 µs  0.5 µs

25 kHz 1 µs

0.5 µm1)

 60
m/min

 120
m/min

50 kHz
25 kHz 0.25 µs  0.5 µs
0.25 µm1)

 60
m/min

 30
m/min

 60
m/min

 30
m/min

2

* Please select when ordering
1)
After 4-fold evaluation in the downstream electronics
2)
With HEIDENHAIN cableⒸ = Reference mark position on LS 4x7 CⒹ = Compressed air inletⓈ = Beginning of measuring length (ML)ð= D
 irection of motion of the scanning unit forascending position values39LS 100 series
Incremental linear encoders with full-size scale housing• High vibration rating• Flat-lying installation possible

Specifications

LS 187

Measuring standard
Coefficient of linear expansion

Glass scale with DIADUR grating, grating period: 20 µm–6 –1Þtherm  8 · 10 K

Accuracy grade*±5 µm; ±3 µm

Measuring length (ML)*in mm

140	 240	 340	 440	 540	 640	 740	 840	 940 1040 1140
1540 1640 1740 1840 2040 2240 2440 2640 2840 3040

Reference marks*

Selectable with magnets every 50 mm; standard setting: one reference mark in the center
Distance-coded

LS 1x7LS 1x7 C

Interface» 1 VPP TTLIntegrated interpolation*
Signal period

–
20 µm

5-fold–Diagnostics interface

Analog– 160 kHzScanning frequency*
Edge separation a

40

1240

1340

1440

10-fold–

20-fold
–

–

–

–

–

100 kHz 50 kHz
 0.5 µs  1 µs

100 kHz 50 kHz 25 kHz 0.25 µs  0.5 µs  1 µs

50 kHz
25 kHz 0.25 µs  0.5 µs

Measuring step

Depends on interpolation

1 µm1)

0.5 µm1)

0.25 µm1)

Electrical connection

Separate adapter cable (1 m/3 m/6 m/9 m) connectable on mounting block

Cable length2)

 150 m 100 mSupply voltage without load

DC 5 V ±0.25 V/< 120 mA

DC 5 V ±0.25 V/< 140 mA

Traversing speed

 120 m/min

 120
m/min

Required moving force

4N

Vibration 55 Hz to 2000 Hz
Shock 11 ms
Acceleration

 200 m/s (EN 60068-2-6)
 400 m/s2 (EN 60068-2-27)
 60 m/s2 in measuring direction

Operating temperature

0 °C to 50 °C

Protection class EN 60529

IP53 when mounted according to the mounting information and instructions
IP64 with compressed air from DA 400

Mass

0.4 kg + 2.3 kg/m of measuring length

Cutoff frequencyÔ, Õ, = Mounting options
F = Machine guideway
P = Measuring points for alignmentⓀ = Required mating dimensionsⒶ = Alternative mating dimensionsⒷ = Cable connection usable at either endⒹ = Compressed-air inlet usable at either endⓉ = Mechanical fixed point (preferred)Ⓖ = Mechanical fixed point (repeated at an interval of 100 mm)Ⓡ = Reference mark position on LS 1x7Ⓒ = Reference mark position on LS 1x7 CⓈ = Beginning of measuring length (ML)Ⓦ = Mating surfaces
ð = Direction of motion of the scanning unit for ascending position values

LS 177

–3 dB

 60
m/min

 120
m/min

 60
m/min

 30
m/min

 60
m/min

 30
m/min

2

* Please select when ordering
1)
After 4-fold evaluation in the downstream electronics
2)
With HEIDENHAIN cable41

LB 383 C up to 3040 mm (single-section housing)
Incremental linear encoder with full-size scale housing• Flat-lying installation possible• Also available in mirrored version (mating dimensions upon request)

50

ML+23690M5

1576 ± 0.2 

7

15

SW3 

(n x 200) ± 0.15 

25
17

18.4

63.2
58.3

Y

(163)

85

113
80 ± 0.15 

ML



Y

M5

80



ISO 7092-6(ISO 7090-5)
ISO 4762-M6(ISO 4762-M5)

6

7.7



A-A

1.2x45°X

1±0.3 ISO 4762-M6

79 ± 0.3 

62 ± 0.3  6

9.3

62 ± 0.3  6



160

40.08

0

40.04

 10.2

4:1

5

65

107

40
26





8.7

25 40 ± 0.2

ML/2

48 ± 2

ISO 4032-M6
10 ± 0.3 

0.1 A

0.1 A
45 ± 0.3 
ISO 4762-M6

 
 = Montage-Möglichkeiten

10 ± 0.3 

15 ± 0.3 

Measuring standard
Coefficient of linear expansion

METALLUR steel scale tape, 40 µm grating period–6 –1Þtherm  10 · 10 K

Accuracy grade±5 µm

Measuring length (ML)*in mm

Single-section housing
440
640
840
1040

Reference marks

Distance-coded

LB 383 C

Interface 1 VPP

Signal period

40 µm

Diagnostics interface

AnalogCutoff frequency



8.5



LB 383 C up to ML 3040 mm

28

50

SW5

Specifications

10

ISO 4762-M5

35

–3 dB

1240

1440

1640

1840

2040 2240 2440 2640 2840 3040

 250 kHzElectrical connection

Separate adapter cable (1 m/3 m/6 m/9 m), connectable at either end of mounting block

Cable length1)

 150 mSupply voltage without load

DC 5 V ±0.25 V/< 150 mA

Traversing speed

 180 m/min (max. acceleration in measuring direction  100 m/s )Required moving force 15 N

Vibration 55 Hz to 2000 Hz
acting on
Shock 11 ms

Housing: 200 m/s (EN 60068-2-6)
Scanning unit: 300 m/s2 (EN 60068-2-6)
 300 m/s2 (EN 60068-2-27)

Operating temperature

0 °C to 50 °C

Protection class EN 60529

IP53 when mounted according to the mounting information and instructions
IP64 with compressed air from DA 400

Mass

1.3 kg + 3.6 kg/m of measuring length22* Please select when ordering
1)
With HEIDENHAIN cable

25 ± 0.2 

 2,5
 R1

 40


F = Maschinenführung = Kundenseitige Anschlussmaße ==Mounting
Kabelanschluss
optionsbeidseitig verwendbar
Spannschraube
MaßbandF ==Machineguideway ==Required
Druckluftanschlussmating dimensions
 ==Cable
Referenzmarken-Lage
LBat3x2connection, usable
either end
 ==Tensioning
Referenzmarken-Lage
LB tape3x2 Cscrew for scale ==CBeginn
der MesslängeML
ompressed
air inlet withintegrated throttle, usable at either end
Startwert bei
Ausführung
Referenzmarken zwischen 0 mm und 71600 mm
 = Referencemarkposition onmit
LBabstandscodierten
3x3 ==Reference
Anlageflächen

mark position on LB 3x3 C
 ==BBewegungsrichtung
derlength
Abtasteinheit
für Ausgangsignale gemäß Schnittstellen-Beschreibung

eginning of measuring
ML;
ML =starting
Messlänge
value for version with distance-coded reference marks between 0 mm and 71600 mm
 = Mating surfaces
ð = Direction of motion of the scanning unit for ascending position values
ML = Measuring length42

43

LB 383 C up to 30 040 mm (multi-section housing)
Incremental linear encoder with full-size scale housing• Measuring lengths of up to 30 m (up to 72 m upon request)• Flat-lying installation possible• Also available in mirrored version (mating dimensions upon request)

ML + 256
15

398



50

L
0.1 F

7

2 ± 0.3

0.3 F
0.05

90
76 ± 0.2



M5



SW3

28

50

SW5

(n x 200) ± 1 
80 ± 0.15 

90 ± 0.15 

m x 200 ± 0.15 Specifications

LB 383 C starting from ML 3240 mm

Measuring standard
Coefficient of linear expansion

METALLUR steel scale tape, 40 µm grating period
Same as machine main casting

Accuracy grade±5 µm

Measuring length ML*

Kit with single-section METALLUR scale tape and housing sections
Measuring lengths from 3240 mm to 30 040 mm in 200 mm steps (up to 72 040 mm upon request)

Reference marks* LB 383 C

Distance-coded

Interface 1 VPP

Signal period

40 µm

Diagnostics interface

Analog

15

468

0.3 F

Y

Cutoff frequency

 20 + (k x 50) (k = 0,1,2...)

0.1 F





Y

4:1

6



M5

 10.2160



ISO 7092-6(ISO 7090-5)
ISO 4762-M6(ISO 4762-M5)

7.7



1.2x45°4026



1±0.3 ISO 4762-M6

ISO 4032-M6
10 ± 0.3 

0.1 A

Separate adapter cable (1 m/3 m/6 m/9 m), connectable at either end of mounting block

Cable length1)

 150 mSupply voltage without load

DC 5 V ±0.25 V/< 150 mA

Traversing speed

 180 m/min (max. acceleration in measuring direction  100 m/s )Required moving force 15 N

Vibration 55 Hz to 2000 Hz
Shock 11 ms

 300 m/s (EN 60068-2-6)
 300 m/s2 (EN 60068-2-27)

Operating temperature

0 °C to 50 °C

Protection class EN 60529

IP53 when mounted according to the mounting information and instructions
IP64 with compressed air from DA 400

Mass

1.3 kg + 3.6 kg/m of measuring length

2

2

X

79 ± 0.3 

62 ± 0.3  680

62 ± 0.3  6

0

9.3



40.08

5 40.04

25 40 ± 0.2

 250 kHzElectrical connection

8.5

48 ± 0.2–3 dB

45 ± 0.3 

0.1 A
ISO 4762-M6

10 ± 0.3 

15 ± 0.3 

10

ISO 4762-M5

35* Please select when ordering
1)
With HEIDENHAIN cable

25 ± 0.2 

X

 2,5

 R1


 40

 
 = Mounting options
F = Machine guideway
 = Required mating dimensions
 = Cable connection, usable at either end = Compressed air inlet with integrated throttle, usable at either end
 = Reference mark position on LB 3x3
 = Reference mark position on LB 3x3 C
 = Beginning of measuring length ML;
starting value for version with distance-coded reference marks between 0 mm and 71600 mm
 = Mating surfaces
ð = Direction of motion of the scanning unit for ascending position values
ML = Measuring length
L = Housing section lengths

44

45

Testing and inspection devices, and diagnostics

Related documents

HEIDENHAIN encoders provide all of theinformation needed for initial setup,monitoring, and diagnostics. The type of
information available depends on whether
the encoder is incremental or absoluteand on which interface is being used.

Further HEIDENHAIN products

Incremental encoders have 1 VPP, TTL or
HTL interfaces. TTL and HTL encoders
monitor their signal amplitudes internallyand generate a simple fault detection signal.
With 1 VPP signals, an analysis of theoutput signals is possible only with external
testing devices or through the use ofcomputation resources in the downstream
electronics (analog diagnostic interface).
Absolute encoders use serial data trans­mission. Depending on the interface,
additional 1 VPP incremental signals can be
output. The signals are extensively monitored
within the encoder. The monitoring results(particularly valuation numbers) can betransmitted to the downstream electronics
along with the position values via the serialinterface (digital diagnostic interface).
The following information is available:• Error message: position value is notreliable• Warning: an internal functional limit of
the encoder has been reached• Valuation numbers:– Detailed information about theencoder’s function reserve– Identical scaling for all HEIDENHAIN
encoders– Cyclic reading capability
This enables the downstream electronics toevaluate the current status of the encoderwith little effort, even in closed-loop mode.
For the analysis of these encoders,
HEIDENHAIN offers the appropriate
PWM inspection devices and PWT testing
devices. Based on how these devices areintegrated, a distinction is made between
two types of diagnostics:• Encoder diagnostics: the encoder isconnected directly to the testing or
inspection device, thereby enabling adetailed analysis of encoder functions.
• Monitoring mode: the PWM inspection
device is inserted within the closed
control loop (via suitable testing adapters
as needed). This enables real-time
diagnosis of the machine or equipment
during operation. The available functions
depend on the interface.

Kabel undSteckverbinder

Contents:
Technical characteristics, cable overviews,
and cable lists

Schnittstellenvon HEIDENHAINMessgeräten

Contents:
Information on serial interfaces,
sinusoidal signals, square-wave signals,
and commutation signals

04/2021

02/2021

Diagnostics with the PWM 21 and ATS software
TNC 640
Die Bahnsteuerung fürBearbeitungszentren und
Fräs-Dreh-Maschinen

09/2021

Brochures
TNC 128 Straight-Cut Control
TNC 320 Contouring Control
TNC 620 Contouring Control
TNC 640 Contouring Control
TNC7 Contouring Control
Contents:
Information for end users

iTNC 530 HSCIDie vielseitige Bahnsteuerung
für Fräsmaschinen, Bohrwerke
und Bearbeitungszentren
Informationen für den
Maschinenhersteller

Januar 2017

MANUALplus 620
Die Steuerung für Zyklenund CNC-DrehmaschinenContents:
Information for end users

OEM brochures
TNC 128 Straight-Cut Control
TNC 320 Contouring Control
TNC 620 Contouring Control
TNC 640 Contouring Control
TNC7 Contouring Control
Contents:
Information for machine manufacturers
OEM brochures
MANUALplus 620 Contouring Control
CNC PILOT 640 Contouring Control

Brochures
MANUALplus 620 Contouring Control
CNC PILOT 640 Contouring Control
MANUALplus 620
Die Bahnsteuerung für Zyklenund CNC-Drehmaschinen
für Antriebsgeneration Gen 3
Informationen für den
Maschinenhersteller

Contents:
Information for machine manufacturers

07/202106/2021

Brochure
Angle Encoders with Integral Bearing

Brochure
Encoders for Servo Drives

Messgeräte fürelektrische Antriebe

Initial setup with the PWM 21 and ATS software

Contents:
Rotary encoders
Angle encoders
Linear encoders

11/2017

Produktinformation

LC 116
LC 196 F/LC 196 M
LC 416
LC 496 F/LC 496 M

Winkelmessgeräte
mit Eigenlagerung

08/2019

Product Information
LC 116, LC 196 F/LC 196 M,
LC 416, LC 496 F/LC 496 M
Absolute linear encoders with optimized
scanning

11/2022

ModulareWinkelmessgeräte
mit Teilungstrommel
oder Maßband

für Werkzeugmaschinen

Further information:
07/2021

Contents:
Incremental angle encoders
ECA, ERA, ECM, ERM

09/2022

Brochure
Measuring Devices For Machine Tool
Inspection and Acceptance Testing

Brochure
Touch Probes

Tastsysteme

Contents:
Absolute angle encoders
RCN, ECN
Incremental angle encoders
RON, RPN, ROD
Brochure
Modular Angle Encoders
with Scale Drum or Scale Tape

Absolute Längenmessgeräte
mit optimierter AbtastungFor detailed descriptions regarding
diagnostics, inspection devices andtesting devices, please refer to theInterfaces of HEIDENHAIN Encoders
brochure.

46

BrochureInterfaces of HEIDENHAIN Encoders

Brochure
Cables and Connectors

Contents:
Tool touch probes
TT
Workpiece touch probes
TS

Messgeräte
zur Abnahme und Kontrolle
von WerkzeugmaschinenContents:
Incremental linear encoders
KGM, VM

05/202147

Mastering nanometer accuracy

DR. JOHANNES HEIDENHAIN GmbH
Dr.-Johannes-Heidenhain-Straße 583301 Traunreut, Germany +49 8669 31-0
 +49 8669 32-5061
info@heidenhain.dewww.heidenhain.com
571470-2K · 1 · 08/2023 · CD · Printed in Germany

HEIDENHAIN
worldwide