Product Information

LIP 481V
LIP 481 U
Exposed Linear Encoders forHigh and Ultrahigh Vacuum
Technology05/2019

LIP 481V; LIP 481 U
Incremental linear encoders with very high accuracy• Special vacuum-compatible design for high and ultrahigh vacuum• For measuring steps of less than 3 nm
• Measuring standard is fastened with fixing clamps

Shown without
scanning head

Shown without
fixing clamps





F
*LksrmndÀ

= Machine guideway= Maximum change during operation= Scale length= Adhesive dries at room temperature in 24 h
= Beginning of measuring length (ML)
= Reference mark position= Mounting surface for scanning head= Quantity of fixing clamp pairs= Distance between fixing clamps=	Direction of motion of scanning unit for ascending
position values

Product Information LIP 481V, LIP 481 U   05/2019

Specifications

LIP 481V

Areas of application

High vacuum, up to 1 · 10

Measuring standard*
Coefficient of linear expansion

SUPRADUR phase grating on glass or Zerodur glass ceramic
Glass: Þtherm  8 · 10–6 K–1; Zerodur glass ceramic: Þtherm  (0 ± 0.1) · 10–6 K–1

Accuracy grade*±1 µm, ±0.5 µm

Baseline error

 ±0.175 µm/5 mm

Measuring length ML* in mm

70	 120	 170	 220	 270	  320	 370	 420

Reference marks

One at midpoint of measuring length

Output signals» 1 VPP

Signal period

2 µm

Cutoff frequency

LIP 481 U–7–3 dBmbar

Ultrahigh vacuum, up to 1 · 10–11 mbar

 300 kHz

Traversing speed

36 m/minInterpolation error
Position noise RMS±7 nm
2 nm (450 kHz)

Supply voltage
Current consumption

DC 5 V ±5%< 190 mA

Electrical connection

15-pin D-sub connector (male); interface electronics integrated in connector

Housing feed-through*(see page 4)

None (interface electronics in a vacuum)

D-sub connector (not included in delivery;
interface electronics not in a vacuum)

Cable length of scanning headto APE*

0.5 m or 1 m

0.5 m or 1 m to the housing feed-through and
0.5 m to the APE

Other cable lengths on request, but  3 m between scanning head and APE
Cable length after APE

 20 m (with HEIDENHAIN cable)

Vibration 55 Hz to 2000 Hz
Shock 11 ms

 200 m/s2 (EN 60068-2-6)
 500 m/s2 (EN 60068-2-27)Operating temperature

0 °C to 40 °C

Baking temperature

100 °C

Materials

PCB:
Ceramic
Adhesives: UHV-compatible, temperature resistant

MassScanning headConnector
ScaleConnecting cable

50 g (without cable)
32 g; with integrated interface electronics: 140 g
5.6 g + 0.2 g/mm measuring length
38 g/m* Please select when ordering
Product Information LIP 481V, LIP 481 U   05/2019

120 °CElectrical connection

LIP 481V
The scanning head cable has a 15-pin
D-sub connector that contains the interface
electronics. A vacuum feed-through (15-pin
D-sub connector on DN63CF flange) andan extension cable are available asaccessories.

LIP 481 U
The encoder must contain no electronic
components during use in ultrahighvacuum. For this reason, the necessaryinterface electronics are outside of theUHV area.

VacuumThe LIP 481 U is equipped with a cable anda UHV-compatible D-sub connector. An
adapter cable with the interface electronics
integrated in its D-sub connector isincluded in delivery. A vacuum feedthrough (15-pin D-sub connector on
DN63CF flange) and an extension cable areavailable as accessories.

Air

LIP 481V high-vacuumsystems

LIP 481 U ultrahighvacuum systems

15-pin D-sub connector
with integrated
interface electronics

Power supply

Incremental signals

Other signals

412210193111471386UPSensor
5V0V

Sensor
0V

A+

A–

B+

B–

R+R–

Vacant//Brown/
GreenBlue

White/
GreenWhite

Brown

Green

Gray

Pink

Red

Black

VioletGreen/Black

Yellow/
Black

Shield on housing; UP = Power supply voltage
Sensor: The sense line is connected internally with the corresponding power line.

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1037419 · 01 · A · 02 · 05/2019 · PDF

This Product Information document supersedes all previous editions, which thereby
become invalid.
The basis for ordering from HEIDENHAIN is always the Product Information document
edition valid when the order is made.
Further information:
Comply with the requirements described in the following documents to ensure thecorrect and intended operation of the encoder:• Brochure: Exposed Linear Encoders
208960-xx• Technical Information: Linear Encoders for Vacuum Technology
627568-xx