Photoelectric Rotary Encoder A42M
Photoelectric Rotary Encoder A42M is of incremental type and provides up to 25.000 output pulses per revolution.
The absence of bearings and lubricants makes the encoder suitable for use in vacuum environment or situations when zero starting torque is required.
- ELECTRICAL DATA:
A42M-A 11 µApp | A42M-AV 1 Vpp | A42M-F TTL; HTL | |
Supply voltage | +5 V ± 5% | +5 V ± 5% | +5 V ± 5%; +(10 to 30) V |
Max. supply current (without load) | 80 mA | 120 mA | 120 mA |
Light source | LED | LED | LED |
Incremental signals | Two sinusoidal I1 and I2 Amplitude at 1 kΩ load: – I1 = 7-16 µA
– I2 = 7-16 µA |
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 V at UP=+5 V – low (logic ”0”) < 1.5 V at UP=10 to 30 V – high (logic ”1”) > 2.4 V at UP=+5 V – high (logic ”1”) > (UP-2) V at UP=10 to 30 V |
Reference signal | One quasi-triangular I0 peak per revolution. Signal magnitude at 1 kW load:
– I0 = 2-8 µA (usable component) |
One quasi-triangular +R and its complementary -R per revolution. Signals magnitude at 120W load
– R = 0.2-0.8 V (usable component) |
One differential square-wave U0/U0 per rev[1]olution. Signal levels at 20 mA load current:
– low (logic “0”) < 0.5 V at UP=+5 V – low (logic “0”) < 1.5 V at UP=10 to 30 V – high (logic “1”) > 2.4 V at UP=+5 V – high (logic “1”) > (UP-2) V at UP=10 to 30 V |
Maximum operating frequency | (-3 dB) > 160 kHz | (-3 dB) > 160 kHz | (160 x k) kHz, k-interpolation factor |
Direction of signals | I 2 lags I1 for clockwise rotation (viewed from shaft side) | +B lags +A for clockwise rotation (viewed from shaft side) | U2 lags U1 with clockwise rotation (viewed from shaft side) |
Maximum rise and fall time | – | – | < 0.5 µs |
Standard cable length | 1 m, without connector | 1 m, without connector | 1 m, without connector |
Maximum cable length | 5 m | 25 m | 25 m |
- MECHANICAL DATA:
Line number on disc (z) | 1000, 2500 (others on request) |
Number of output pulses per revolution for A42M-F | Z x k, where k=1,2, 3, 4, 5, 8, 10 |
Max. permissible mechanical rotation speed | 20000 rpm |
Accuracy (T1-period of lines on disc in arc. sec.) | ±0.1T1 arc. sec |
Permissible axial shaft run out | 0.05 mm |
Hub inside diameter | 10, 8, 6 mm |
Rotor moment of inertia | < 22 gcm2 |
Protection (IEC 529) | IP00 |
Max. weight:
– rotor assembly – scanning unit |
0.022 kg 0.04 kg |
Operating temperature | -10…+70 OC |
Storage temperature | -30…+85 OC |
Maximum humidity (non-condensing) | 98 % |
Permissible vibration (55 to 2000 Hz) | < 100 m/s2 |
Permissible shock (6 ms) | < 1000 m/s2 |