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The GE IC695CMM004 is a serial communications module for the PACSystems RX3i series of Programmable Logic Controllers (PLCs), now part of Emerson Automation. It is used to establish communication between the PLC and other devices that use serial protocols.
Key Features and Specifications
- Dual-Port Design: The module provides two independent, isolated serial ports. This allows the PLC to communicate with two different serial devices simultaneously.
- Protocol Support: Both ports are individually configurable to support various serial communication protocols, including RS-232, RS-485, and RS-422. RS-422 is similar to RS-485 but is primarily used for point-to-point communication over longer distances.
- Electrical Isolation: The ports are electrically isolated from each other and from the backplane. This protects the PLC and connected devices from ground loops, electrical noise, and voltage surges.
- Modbus Master/Slave: The module supports the popular Modbus RTU protocol in both master and slave modes. This allows the PLC to either poll data from other devices (master mode) or respond to requests from a higher-level controller (slave mode).
- Software Configuration: All communication settings, such as baud rate, parity, and protocol, are configured using the Proficy Machine Edition software.
- Hot Swap Capability: The module supports hot insertion and extraction, which means it can be replaced while the system is powered on, minimizing downtime.
Applications
The IC695CMM004 is a fundamental component for integrating an RX3i PLC into a larger control system. It is used in applications that require:
- Device Integration: Communicating with smart devices like barcode readers, variable frequency drives (VFDs), and human-machine interfaces (HMIs).
- Network Connectivity: Connecting the PLC to a SCADA or MES network.
- Legacy System Interfacing: Interacting with older equipment that only supports serial communication.
- Remote I/O: The module can be used to set up a serial network for controlling remote I/O devices.
