TIC CV21 3RQ Modbus Interface Module

The TIC Support CV21 3RQ Modbus Interface Module enables Modbus communication between controllers, PLCs, HMIs, and field devices in industrial automation, delivering reliable data exchange to support system integration. This control-panel mounted module is designed for OEM machinery and manufacturing equipment requiring Modbus serial connectivity, making it ideal for PLC–HMI–SCADA ecosystems and process control networks. The CV21 3RQ (CV213RQ) is a dedicated Modbus interface that facilitates PLC, HMI, and field device communication across Modbus‑compatible devices. Maintenance teams, OEM machine builders, and system integrators use this interface module for communication upgrades, replacement of failed interface modules, and restoration of industrial network connectivity. It is compatible with PLCs, HMIs, SCADA systems, and other Modbus devices, and is intended as an OEM part for robust industrial environments and automation networks. Common replacements include TIC Support CV21 3RS and CV21 3RT, as well as CV213RQ Rev. B.