A28

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 that enables the customer to fit it in tight places without any hassle.



Mechanical Data

Number of output pulses per revolution 60-25,000 ppr
Line number on disc (z) 60; 100; 200; 250; 360: 500; 1000; 1500; 2000; 2500
Maximum shaft speed 6000 rpm
Maximum shaft load - axial: 5 N
- radial: 10 N
Accuracy (T1-period lines on disc in arc. sec) ± 0.1T1 arc. sec
Starting torque at 20°C ≤ 0.015 Nm
Rotor moment of inertia < 2 cm²
Protection (IEC 529) - for axial cable outlet: IP54
- for axial cable outlet through gland and for radial cable outlet: IP67
Maximum weight without cable 0.045 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

Version A28-F Π TTL    
Supply voltage + 5 V ± 5 %    
Max. supply current (without load) 120 mA    
Light source LED    
Incremental signals

Differential square - wave U1 / U1 and U2 / U2. Signal levels at 20 mA loadcurrent:
- low (logic "0") ≤ 0.5 V
- high (logic "1") ≥ 2.4 V

   
Reference signal

One differential square-wave U0 / U0 per revolution. Signal level at 20 mA loadcurrent:
- low (logic "0") ≤ 0.5 V
- high (logic "1") ≥ 2.4 V

   
Maximum operating frequency 160 x k kHz, k - interpolation factor    
Direction of signals U2 lags U1 for clockwise rotation (viewed from shaft side)    
Maximum rise and fall time < 0.5 µs    
Standard cable length 0.5 m; without connector    
Maximum cable length 25 m    

Accessories

Drawings

Typical Applications

           
           
         

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