Introduction

2 channel SSI encoder interface

The EJ5002 SSI interface EtherCAT module is used for the direct connection of two SSI absolute encoders. The interface circuit generates a pulse for reading the encoder, and makes the incoming data stream available to the controller as a data word in the process image. Different operation modes, SSI clock rates, codings and data lengths can be set and evaluated. An additional bit can also be displayed directly in the process image.

The 24 V supply of the encoder can be made directly via the supply on the signal distribution board. The EJ9505 power supply module can be used for an optional 5 V supply voltage.

The EJ5002 supports distributed clocks: Cyclic reading of the SSI encoder can thus be started with high precision, enabling detailed dynamic analysis of the axes in the control system.