Product Information

LIF 481 Dplus
Incremental Exposed
Linear Encoder plus
Perpendicular Added Track02/2022

LIF 481 Dplus

Incremental exposed linear encoder• Additional Y track for measurement of errors lateral to the direction of measurement• Glass ceramic scale, fastened with PRECIMET or fixing clamps

Scale, clamped

Scale, adhesively bonded

Mounting surface for scanning heads

F = Machine guideway* = Maximum change during operation
L = Overall length
ML = Measuring lengths = Beginning of measuring length (ML)r = Reference mark positione =	Epoxy bond fixed point, shown at the reference marks(possible alternative at ML/2, for example)
1 = Direction of scanning unit motion for output signals in accordance with interface description

2

Product Information LIF 481 Dplus   02/2022

Scale

LIF 401 Dplus

Measuring standard
Coefficient of linear expansion
Grating period

SUPRADUR phase grating on Zerodur glass ceramicÞtherm  (0 ±0.1) · 10–6 K–1
8 µm

Accuracy grade*

X direction: ±3 µm; Y direction: ±20 µm

Measuring length (ML)*in mm  70	 120	 170	 220	 270	 320	 370	 420	 470	 520	 570	 620	 670	 720770	 820	 870	 920	 970 1020 1140 1240 1340 1440 1540 1640 1740 1840
1940 2040 2140 2240 2340 2440 2540 2640 2740 2840 2940 3040

Measuring range of Y track±1 mm

Reference marks

One reference mark at beginning of measuring length

Mass

247 g/mScanning head

LIF 48

LIF 47

Interface» 1 VPP TTLIntegrated interpolation*
Signal period
Measuring step1)

–
4 µm
–

5-fold
0.8 µm
0.2 µmCutoff frequency

 1 MHz–Scanning frequency*–

Edge separation a10-fold
0.4 µm
0.1 µm20-fold
0.2 µm0.05 µm50-fold
0.08 µm
0.02 µm

100-fold
0.04 µm
0.01 µm

 500 kHz 250 kHz 125 kHz 250 kHz 125 kHz 62.5 kHz

 250 kHz 125 kHz 62.5 kHz

 100 kHz 50 kHz 25 kHz 50 kHz 25 kHz 12.5 kHz– 0.080 µs
 0.175 µs
 0.370 µs

 0.080 µs
 0.175 µs
 0.370 µs

 0.040 µs
 0.080 µs
 0.175 µs

 0.040 µs
 0.080 µs
 0.175 µs

 0.040 µs
 0.080 µs
 0.175 µs

Traversing speed2)

 240 m/min

 120 m/min
 60 m/min
 30 m/min

 60 m/min
 30 m/min
 15 m/min

 60 m/min
 30 m/min
 15 m/min

 24 m/min
 12 m/min
 6 m/min 12 m/min
 6 m/min
 3 m/minInterpolation error
RMS position noise–±12 nm3)
0.6 nm (1 MHz )Electrical connection*Cable (0.5 m/1 m/3 m) with 15-pin D-sub connector (male); interface electronics in the connector

Cable length

See interface description; however,incremental:  30 m; homing, limit:  10 m; (with HEIDENHAIN cable)

Supply voltage

DC 5 V ±0.25 V

Current consumption< 150 mAVibration 55 Hz to 2000 Hz
Shock 11 ms

 400 m/s2 (EN 60068-2-6)
 500 m/s2 (EN 60068-2-27)

Operating temperature

0 °C to 50 °C

Mass–3 dB

Scanning head*CableConnector< 165 mA (without load)

For scale made of Zerodur glass ceramic: 25 g
38 g/m75 g* Please select when ordering
1)
After 4-fold evaluation
2)
With TTL: maximum traversing speed during referencing: 9.6 m/min (40 kHz)
3)
–3 dB cutoff frequency of the downstream electronics
Product Information LIF 481 Dplus   02/2022

3Electrical connection

Connecting cables
PUR connecting cable [6(2 x 0.09 mm2) + (4 x 0.16 mm2)] AP = 0.16 mm2
PUR connecting cable [6(2 x 0.16 mm2) + (4 x 0.5 mm2)] AP = 0.5 mm2¬ 8 mm¬ 6 mm1)

With one 15-pin D-sub connector (female)

354411-xx

355398-xx

Complete with 15-pin D-sub connector(female) and 15-pin D-sub connector (male)

354379-xx

355397-xx

1)Max. total cable length: 9 m
AP: Cross section of power supply lines

Pin layout
15-pin D-sub connectorPower supply« TTL» 1 VPP2)

Incremental signals

Other signals

4122

101

93

111471386UPSensor
5V0VSensor
0V

Ua1¢

Ua2£

Ua0

¥H3)

L3)

A+A–

B+B–

R+R–Assigned

GrayPinkRedBlack

Violet Green/ Yellow/ Yellow
BlackBlackBrown/ Blue
GreenWhite/ White Brown Green
GreenShield on housing; UP = Power supply voltage
Sensor: The sense line is connected in the encoder withthe corresponding power line.
Vacant pins or wires must not be used!

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155PWT1) Vacant
As- Vacantsigned/1)

TTL/11 µAPP conversion for the PWTColor assignment of the connecting cable3)
Valid only for the LIP 6000/LIF 4002)

This Product Information document supersedes all previous editions, which thereby
become invalid. The basis for ordering from HEIDENHAIN is always the Product
Information document valid when the contract is made.

Further information:
To ensure proper and intended use, comply with the specifications in the following
documents:• Brochure: Interfaces of HEIDENHAIN Encoders1078628-xx• Brochure: Exposed Linear Encoders
208960-xx• Brochure: MULTI-DOF Measurement Technology
for Multiple Degrees of Freedom
1349070-xx