ABB AC500 PLC - 1.3.3 CM574-RS with 2 Serial Interfaces; 1.3.3.1 Purpose; 1.3.3.2 Electrical Connection; 1.3.3.2.1 Serial Interfaces

1.3.3 CM574-RS with 2 Serial Interfaces
1 5 LEDs for state display
2 2 rotary switches for address setting
3 Label
4 2 serial communication interfaces
1.3.3.1 Purpose
Communication module CM574-RS is equipped with 2 serial interfaces (COM1 and COM2)
which can be used as programming interface or for communication e.g. for communication via
Modbus or ASCII.
The CM574-RS can be a CS31 Master at COM1 and COM2.
Depending on the electrical connection, the physical interface of COM1 and COM2 is either
RS-232 or RS-485.
1.3.3.2 Electrical Connection
1.3.3.2.1 Serial Interfaces
The serial interface connectors (COM1/COM2) have the following pin assignment:
Device Specifications
Communication Modules (AC500 Standard) > CM574-RS with 2 Serial Interfaces
2019/04/173ADR010121, 13, en_US100