A28

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Photoelectric Rotary Encoder

Photoelectric rotary encoder A28 is a small 28mm diameter incremental encoder that can have up to 25.000 output pulses per revolution.

Small size is its primary feature which is a benefit for use in small spaces

 

Technical Data

MECHANICAL DATA
Line number on disc (z)60; 100; 200; 250; 360; 500; 1000; 1024; 1500; 2000; 2500
Number of output pulses per revolutionZ x k, where k=1,2,3,4,5,8,10
Maximum shaft speed6000 rpm
Maximum shaft load:
- axial
- radial (at shaft end)

5N
10N
Accuracy
(T1-period of lines on disc in arc. sec)
±0.1T arc.sec 1
Starting torque at 20°C≤ 0.015 Nm
Rotor moment of inertia< 2 gcm²
Protection (IEC 529)
- for axial cable outlet
- for radial cable outlet

IP54
IP64
Maximum weight without cable0.045 kg
Operating temperature-10 ... +70°C
Storage temperature-30 ... +80 °C
Maximum humidity
(non-condensing)
98%
Permissible vibration (55 to 2000 Hz)< 100 m/s²
Permissible shock (11 ms)< 300 m/s²
ELECTRICAL DATA
Supply voltage+5 V ± 5%
Max. supply current (without load)120 mA
Light sourceLED
Incremental signalsDifferential square - wave U1/U1 and U2/U2.
Signal levels at 20 mA load current:
- low (logic "0") < 0.5 V
- high (logic &guot;1") > 2.4 V
Reference signalOne 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(160 x k) kHz , k-interpolation factor
Direction of signalsU2 lags U1 for clockwise rotation
(Viewed from shaft side)
Maximum rise and fall time<0.5μs
Standard cable length0.5m; without connector
Maximum cable length25m
For other data, please see the attached data sheet