A75M Incremental Rotary Encoder
A75M Rotary Encoder Drawing

Ø75mm incremental encoder

A75M

Optical modular rotary encoder A75M is a wider diameter incremental encoder than its predecessor A42M, as it is the main difference between these two open-type encoders.

Mechanical data

Number of output pulses per revolution 512-20480
Line number on disc (z) 512: 2048 (others on request)
Max. permissible mechanical rotation speed 16000 RPM
Accuracy (T1-period lines on disc in arc. sec) ± 0.1T1 arc. sec
Permissible axial shaft runout 0.05 mm
Rotor moment of inertia with shaft ∅ 20 mm: 26×10-6 kgm2
with shaft ∅ 30 mm: 35 x10-6 kgm2
Protection (IEC 529) IP00
Maximum weight 0.2 kg
Operating temperature 0…+85°C
Storage temperature -30…+85°C
Maximum humidity (non-condensing) 98%
Permissible vibration (55 to 2000 Hz) ≤ 100 m/s²
Permissible shock (6 ms) ≤ 1000 m/s²

Electrical data

Version A75-AV ∫ 1 Vpp A75-F Π TTL
Supply voltage  + 5 V ± 5 %  + 5 V ± 5 %
Max. supply current (without load) 80 mA 120 mA
Light source LED LED
Incremental signals Differential sine +A / -A and +B / -B
Amplitude at 120 kΩ load:
– I1 = 0.6 – 1.2 V
– I2 = 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 =± 5V
– high (logic “1”) ≥ 2.4 V at Up =±5V
Reference signal One quasi-triangular +R and its complementary -R per revolution. Signals magnitude at 120 W load:
– I0 = 0.2 – 0.8 V (usable component		 One differential square-wave U0 / U0 per revolution. Signal levels at 20 mA load current:
– low (logic “0”) < 0.5 V at Up =± 5V
– low (logic “0”) < 1.5 V at Up = 10 to 30 V
– high (logic “1”) > 2.4 V at Up =±5V
– high (logic “1”) > (Up – 2)V at Up = 10 to 30 V
Maximum operating frequency (-3 dB) ≥ 160 kHz (160 x k) kHz, k – interpolation factor
Direction of signals + B lags + A in clockwise rotation (viewed from shaft side) U2 lags with U1 in clockwise rotation (viewed from shaft side)
Maximum rise and fall time – < 0.5 μs
Maximum cable length 25 m 25 m

Accessories

Downloads

Product Catalog
Encoder Selection Guide 2021
A75M Rotary Encoder Datasheet
A75M Incremental Rotary Encoder 2D Drawing
A75M Incremental Rotary Encoder 3D Drawing

Order code

A75M- X1 – X2/X3 – X4 – X5/X6

Output Signal Version (X1) Pulse Number per Revolution (X2) Hub Inside Diameter (X3) Adapter Cable (X4) Connector Type for Adapter Cable (X5)
AV
F		 512
…
5000*
*only F signal version for >5000 pulses		 06 – ⌀6mm
10 – ⌀10 mm
20 – ⌀20 mm
24 – ⌀24 mm
30 – ⌀30 mm		 W – without cable
AC01 – 1m
AC02 – 2m
AC03 – 3m
…		 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. A75M-F-4096-06-W-W
  2. A75M-AV-512-10-AC01/B12

Order form

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