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
?therm ? 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
?therm?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
