HEIDENHAIN LS 487 Sealed Linear Encoder

Specifications

LS 487

LS 477

Measuring standard

Coefficient of linear expansion

Glass scale with DIADUR grating, grating period 20 µm

?therm  8 x 10–6 K–1 (mounting type I/II); with mounting spar: ?therm  9 x 10–6 K–1 (mounting type III)

Accuracy grade*

±5 µm; ±3 µm

Measuring length ML* in mm

Mounting spar* up to ML 1240 optional, necessary as of ML 1340

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

Reference marks* LS 4x7

LS 4x7 C

• Selectable with magnets every 50 mm• One reference mark at midpoint of measuring length• Two reference marks, each 35 mm (for ML ? 1 020 mm) or 45 mm (for ML ? 1 140 mm) from the beginning and end of the measuring length

Distance-coded

Interface

  1 VPP

? TTL

Integrated interpolation*

Signal period

–

20 µm

5-fold

–

10-fold

–

20-fold

–

Diagnostics interface

Analog

–

Cutoff frequency –3 dB

? 160 kHz

–

–

–

Scanning frequency*

Edge separation a

–

100 kHz

? 0.5 µs

50 kHz

? 1 µs

100 kHz

? 0.25 µs

50 kHz

? 0.5 µs

25 kHz

? 1 µs

50 kHz

? 0.25 µs

25 kHz

? 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) connectible to mounting block

Cable length2)

? 150 m

? 100 m

Voltage supply
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

? 60 m/min

? 120 m/min

? 60 m/min

? 30 m/min

? 60 m/min

? 30 m/min

Required moving force

? 5 N

Vibration 55 Hz to 2000 Hz

Shock 11 ms

Acceleration

Without mounting spar: ? 100 m/s2 (EN 60 068-2-6)
With mounting spar, cable outlet at right: ? 200 m/s2, links: 100 m/s2 (EN 60 068-2-6)

? 300 m/s2 (EN 60 068-2-27)

? 100 m/s2 in measuring direction

Operating temperature

0 °C to 50 °C

Protection EN 60 529

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

Mass

0.4 kg + 0.5 kg/m measuring length

* Please select when ordering

1) After 4-fold evaluation in the subsequent electronics

2) With HEIDENHAIN cable