RKC Instrument Z-COM-A-55 122D PLC Communications

RKC Instrument Z-COM-A-55 122D SRZ PLC Communication Extension Module is a 24 VDC-powered add-on that enables an SRZ controller to exchange data with external PLCs using RKC’s Z-COM host communication protocol. Designed to extend a PLC port, it supports connecting up to four Z-COM modules to a single PLC port, enabling scalable multi-device integration within an automation network. The module facilitates PLC register mapping between RKC SRZ data and external PLC addresses across supported brands, including Mitsubishi MELSEC series (A-compatible frames), Omron SYSMAC, and Yokogawa FA-M3R families, as documented in RKC’s Z-COM manuals. For configuration, Zeal2 (MAPMAN-ready) software provides PLC register mapping and editing to simplify integration, including a programless flow to connect SRZ devices to Mitsubishi PLCs via MAPMAN. Typical applications include industrial temperature control systems where SRZ controllers share setpoints, readings, and status with a PLC for centralized automation, HMI visualization, and data logging. The A-55/122D variant denotes a specific Z-COM-A configuration optimized for SRZ units, delivering reliable, protocol-based data exchange while preserving SRZ control performance. This module uses standard 24‑VDC industrial power and communicates with the PLC through the dedicated Z-COM port, making it suitable for OEMs and integrators building modular control architectures.