Ø79mm absolute encoder


This is a high-resolution, singleturn absolute encoder kit with a 22 Bit BiSS-C interface. The encoder consists of several optical reflectance sensors arranged at an angle of 180 degrees to each other. This allows to eliminate mechanical errors in the application, such as the runout of the measured shaft, by using subsequent electronics.

Mechanical data

Maximum shaft speed 2000 rpm
Permissible axial motion of measured shaft 0.03 mm
Permissible radial runout of measured shaft 0.03 mm
Rotor moment of inertia < 30 x 10-6 gcm²
Protection (IEC 529) IP00
Maximum weight without cable 0.05 kg
Operating temperature  -40…+100°C
Storage temperature  -40…+100°C
Maximum humidity (non-condensing) 98%

Electrical data

Resolution 22 bit
Output code Binary
Data interface Serial BiSS C
Periods number of signals 1Vpp 512
Accuracy* ≤ ± 100 arc.sec.
Supply voltage 5 V ± 5 %
Supply current 80 – 220 mA
Cutoff frequency < 240 kHz
Start up time 13 ms
Scan ratio of T 40 – 60%
Time lag 80 ns
Monoflop time timeout + T/2 us
Rise and fall time 4 – 15 ns
Analog signals ~ 1Vpp (512 PPR)
Amplitude output voltage 0.6 – 1.2 VDC
Output current 22 mA

*Expected at optimum installation, additional deviations due to mounting and
inaccuracy of the measured shaft are not taken into account.

Note: Maximum working rotation speed (with proper encoder counting) is
limited by maximum operating frequency and maximum mechanical rotation


Order code

AR79 – X1 – X2 – X3

Adjustment (X1) Adjustment (X2) Adjustment (X3)
This is just an example of a specific tailor-made encoder kit, but there can be numerous variations with different interfaces, mechanical, electrical adjustments, etc. The client would have to cover the non-recurring engineering (NRE) cost for designing and manufacturing the encoder kit depending on the complexity of adjustments needed for the application.

Note: Please consult beforehand to confirm specific adjustments and capabilities.

Order form

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