Photoelectric Rotary Encoder A75M
Photoelectric Rotary Encoder A75M is a wider diameter incremental encoder than A42M, as it is the main difference between these two open-type encoders.
- ELECTRICAL DATA:
VERSION | A75M-AV 1Vpp | A75M-F TTL |
Power supply | +5 V ± 5%/ < 120 mA | +5 V ± 5%/ < 120 mA |
Light source | LED | LED |
Incremental signals | Differential sine +A/-A and +B/-B Amplitude at 120 Ω load:
– A = 0.6-1.2 V – B = 0.6-1.2 V |
Differential square-wave U1/U1 and U2/U2. Signal levels at 20 mA load current:
– low (logic ”0” ) < 0.5 – high (logic ”1”) > 2.4 V |
Reference signal | One quasi-triangular +R and its complimentary -R per revolution. Signal magnitude at 120 Ω load:
– R = 0.2…0.8 V (usable) |
One differential square-wave U0/U0 per revolution. Signal levels at 20 mA load current:
– low (logic ”0”) < 0.5 V – high (logic ”1”) > 2.4 V |
Maximum operating frequency | -3 dB) > 180 kHz | (160 x k) kHz, k – interpolation factor |
Direction of signals | +B lags +A for clockwise rotation (viewed from shaft side) | U2 lags U1 for clockwise rotation (viewed from shaft side) |
Maximum rise and fall time | – | < 0.5 µs |
Recommended max. cable length to subsequent electronics |
25M |
25 |
- MECHANICAL DATA:
Line number on disc (z) | 512; 2048; 5000 (others on request) |
Number of output pulses per revolution for A75M-F | Z x k, where k= 1, 2, 3, 4, 5, 8, 10 |
Max. permissible mechanical rotation speed | 16000 rpm |
Accuracy (T1-period of lines on disc in arc. sec.) | ±0.1T1 arc. sec. |
Permissible axial shaft run out | ±0.05 mm |
Rotor moment of inertia:
– with shaft Ø 20 mm – with shaft Ø 30 mm |
26×10-6 kgm2 35×10-6 kgm2 |
Protection (IEC 529) | IP00 |
Max. weight | 0.2 kg |
Operating temperature | 0…+85 OC |
Storage temperature | -30…+85 OC |
Maximum humidity (non-condensing) | 98 % |
Permissible vibration (55 to 2000 Hz) | < 100 m/s |
Permissible shock (6 ms) | < 1000 m/s |