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ERA 8000 series

Request

Scanning head

AK ERA 8480

Interface

1 VPP

Cutoff frequency –3 dB

≥ 350 kHz

Electrical connection

Cable 1 m, with M23 coupling (12-pin)

Cable length

≤ 150 m (with HEIDENHAIN cable)

Voltage supply

5 V DC ± 0.25 V

Current requirement

< 100 mA (without load)

Vibration 55 to 2 000 Hz

Shock 6 ms

≤ 200 m/s2 (EN 60 068-2-6)

≤ 1 000 m/s2 (EN 60 068-2-27)

Operating temperature

-10 °C to 80 °C

Weight (approx.)

20 g (without cable)

Scale tape

MSB ERA 8400 C full-circle version

MSB ERA 8401 C segment version with tensioning elements

MSB ERA 8402 C segment version without tensioning elements

Measuring standard

Grating period

Expansion factor

Steel scale-tape with METALLUR graduation

40 µm

αtherm ≈ 10.5 · 10-6 K-1

Signal periods1)

36 000

45 000

90 000

Accuracy of the graduation2)

± 4.7”

± 3.9”

± 1.9”

Position error per signal period2)

± 0.4”

± 0.3”

± 0.1”

Accuracy of the scale tape

± 3 µm/m of tape length

Reference marks

Distance-coded

Scale-slot diameter*

Full circle

458.11 mm

572.72 mm

1145.73 mm

Segment

≥ 400 mm

Mech. permissible speed

≤ 50 min-1

≤ 50 min-1

≤ 45 min-1

Perm. axial movement

≤ 0.5 mm (scale tape relative to scanning head)

Permissible expansion coefficient of shaft

αtherm ≈ 9 · 10-6 K-1 to 12 · 10-6 K-1

Protection EN 60 529

IP 00

Weight (approx.)

30 g/m

* Please select when ordering

1) Applies to full-circle version; for segment versions depends on mating diameter and tape length

2) The accuracy of the graduation and the position error within one signal period result together in the encoder-specific error; for additional error through mounting and the bearing of the measured shaft, see Measuring accuracy

Other diameters and higher speeds available on request