Ø28mm incremental encoder

A28

Optical 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

Downloads

Order code

A28 – F – X1 – X2/X3

Pulse number Per revolution (X1): Cable length and outlet (X2) Connector type (X3)
60

2500
R01 – 1m (R-radial outlet)
R02 – 2m
A01 – 1m (A-axial outlet)
A02 – 2m
W – without connector
B12 – round, 12 pins
C12 – round, 12 pins
D9 – flat, 9 pins
D15 – flat, 15 pins
RS10 – round, 10 pins
ONC – round, 10 pins

 

ORDER EXAMPLES: 

  1. A28-F-2500-R01/W
  2. A28-F-60-R02/D15

Order form

    Check the "Order code" tab in the product page to see how to know your order code.