ERA 7000 series

Scanning head

AK ERA 7480

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

DC 5 V ±0.5 V

Current consumption

< 100 mA (without load)

Vibration 55 to 2000 Hz

Shock 6 ms

≤ 200 m/s2 (EN 60 068-2-6)

≤ 1000 m/s2 (EN 60 068-2-27)

Operating temperature

–10 °C to 80 °C

Mass

≈ 20 g (without cable)

Scale Tape

MSB ERA 7400 C full circle version

MSB ERA 7401 C segment version

Measuring standard

Grating period

Coefficient of expansion

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 graduation2)

±3.9”

±3.2”

±1.6”

Interpolation 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

458.62 mm

573.20 mm

1146.10 mm

Segment

≥ 400 mm

Mech. permissible speed

≤ 250 rpm

≤ 250 rpm

≤ 220 rpm

Permissible 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

Complete encoder in mounted condition: IP00

Mass

≈ 30 g/m

* Please select when ordering, additional diameters up to max. 3 m upon request

1) Validity for full circle version; for segment versions depending on the mating diameter and the tape length

2) Accuracy of the graduation and interpolation error within one signal period result in the encoder-specific error; for additional error from mounting and bearing of the measured shaft, see Measuring accuracy