Photoelectric absolute singleturn and multiturn rotary encoder series AK58 is constituted of 7 different models - AK58M, AK58B, AK58C, AK58C2, AK58C3, AK58D and AK58 EtherCAT. Encoders use SSI, BiSS or EtherCAT serial interfaces and output up to 21 bit singleturn and 24 bit multiturn resolutions through binary or Gray codes.

Mechanical Data

Maximum shaft speed 12000 rpm
Maximum shaft load - axial: 10 N
- radial: 20 N
Starting torque at 20°C < 0.01 Nm
Rotor moment of inertia < 15 gcm²
Protection (IEC 529) IP65
Maximum weight without cable 0.3 kg

Operating temperature
- singleturn version
- multiturn version


Storage temperature
- singleturn version
- multiturn version
Maximum humidity (non-condensing) 98%
Permissible vibration (55 to 2000 Hz) ≤ 100 m/s²
Permissible shock (11 ms) ≤ 1000 m/s²

Electrical Data

Resolution per revolution for singleturn version

with interface BiSS C -  9...21 bit
with interface SSI -   9...21 bit

Resolution per revolution for multiturn version

singleturn resolution with BiSS C -   9...21 bit
multiturn resolution with BiSS C -   12/16/20/24 bit
singleturn resolution with SSI -   9...21 bit
multiturn resolution with SSI -   12/16/20/24 bit

Output code Gray, Binary
Data interface Serial SSI, Serial BiSS C
Light source LED
Accuracy ± 1 LSB
Supply Voltage 5 V ± 5 %
Maximum supply current 50 mA
Maximum operating frequency - with interface BiSS C: 10 MHz
- with interface SSI: 4 MHz
Cable length (standard) 1 m
Maximum cable length 25 m

AK58 EtherCAT

The EtherCAT encoders support the CANopen communication profile according to “CanOpen Over EtherCAT” (COE) mode of data transfer with “Device profile for encoders”, Class 1. For more details please refer to “CiA Draft Standard 406” at www.can-cia.org.


Electrical Data


Resolution per revolution (position number)

220 (1048576)

Output code Gray, Binary
Protocol EtherCAT
Accuracy ± 30 arc sec
Supply Voltage 10...30V DC
Maximum consumed current 110 mA
Connection 3 x M12 connectors
Operating temperature
Storage temperature -30...+90°C

Encoder supports the following operating modes:

- FreeRun - asynchronous mode

- Distributed clock synchronization mode. Minimum cycle time 62,5 us. Three status LEDs are located in the rear side of the absolute encoder.


Electrical Connection

















Typical Applications


Order Form

Contact us:


Make an enquiry by filling the form on the left!

Send us a quick e-mail for pricing or any questions regarding the product: sales@precizika.com

Some of your questions may already have been answered in our Frequently Asked Questions section, please take a look!

You can also contact us via phone: +370 (5) 236 3608