AC500-eCo/S500-eCo System Structure

AC500-eCo/S500-eCo serie is fully compatible with AC500/S500. Customers can flexibly select S500-eCo I/O modules and S500 I/O modules to realize economical and upgradeable solutions.

The AC500-eCo Processor Module can run independently but also carry out centralized I/O expansion, decentralized I/O expansion and network extension.

Centralized I/O Expansion

Centralized I/O expansion means that the Processor Module is connected with the I/O Module via I/O bus on the side to increase control points and functions.

I/O Modules (S500-eCo) directly connected to a AC500-eCo Processor Module

Decentralized I/O Expansion

Usually, for distributed expansion of an AC500-eCo PLC is realized with CS31 module. As the master station, the Processor Module communicates with CS31 slave station module (such as DC551) via the serial port COM1 connected to the bus.

I/O Modules (S500-eCo) connected to a AC500-eCo Processor Module via CS31 bus