Basic Information

Compatibility: ABB AC500 full series CPU (same platform as CM574-RS, different sub-models)

Structure: Standard DIN rail installation, backplane power supply, industrial-grade dustproof and shockproof

Positioning: Dual serial port expansion card with RCOM protocol, focusing on high-speed serial port interconnection between PLCs + peripheral communication

Core parameters

Ports: 2× Independent configurable serial ports (RS232/RS422/RS485 software switch)

Protocols: Supports Modbus RTU/ASCII, free protocol, RCOM (ABB's dedicated PLC interconnection)

Baud rate: Up to 115.2 kbps, supports long-distance transmission (RS485 up to 1200m)

Status: Panel LED indicators (power, operation, communication, fault)

Functions: Online configuration, hot swapping, redundant compatibility

Difference from CM574-RS (1SAP170400R0001)

CM574-RCOM (1SAP170401R0001): With RCOM, mainly for high-speed interconnection between PLCs and PLCs/ABB devices, also includes conventional serial ports for peripherals

CM574-RS (1SAP170400R0001): Without RCOM, pure general serial ports (RS232/485), for instruments, frequency converters, HMI, etc. Typical application

ABB AC500 Multi-PLC Networking (RCOM High-Speed Interconnection)

Connecting serial port instruments, frequency converters, barcode scanners, HMI

Renovation of serial ports for old equipment, data collection, remote monitoring

Packaging, water treatment, HVAC, general assembly lines, etc.