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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.

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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

 

 

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