ABB HENF209650R1 P3LC Drive Board

The synchronized I/O bus is the I/O data bus for the I/O modules connected with the processor modules or communication interface modules. Through this bus, I/O and diagnosis data are transferred.

With its fast data transmission, the I/O bus obtains very low reaction times.

Up to 10 I/O terminal units (for one I/O module each) can be added to one terminal base or to one AC500-eCo processor module. The I/O terminal units and the AC500-eCo I/O modules, have a bus input at the left side and a bus output at the right side. Thus the length of the I/O bus increases with the number of attached I/O modules.

I/O bus connection

The connection of the I/O bus is performed automatically by telescoping the modules on the DIN rail. The I/O bus provides the following signals:

● Supply voltage of 3.3 V DC for feeding the electronic interface components 

● 3 data lines for the synchronized serial data exchange

● several control signals