Products Description
ProSoft MVI56-MCM Modbus Communication Module
The ProSoft MVI56-MCM is a Modbus master/slave communication module designed for Allen‑Bradley ControlLogix PLC chassis. It acts as an independent communication gateway to exchange data between ControlLogix backplane and Modbus RTU/ASCII field devices, supporting multi-point data collection and control command transmission.


This hot-swappable rack plug-in module supports multiple Modbus connections and internal data register mapping. It is widely used as spare parts for retrofitting and maintenance of industrial automation cabinets in petrochemical, power and water treatment industries.
Main Specifications
- Brand: ProSoft Technology; Model: MVI56-MCM; Type: Modbus Communication Module
- Applicable System: Allen‑Bradley ControlLogix PLC platform
- Core Tasks: Modbus master/slave communication, data mapping, protocol conversion, communication fault diagnosis
- Signal Interface: RS485/RS232 serial ports, ControlLogix backplane connector
- Installation: Plug-in slot mounting on standard ControlLogix chassis rack, supports hot swap
- Supported Protocol: Modbus RTU, Modbus ASCII
- Operating Environment: 0℃ ~ +60℃, 5%‑95% RH non‑condensing, industrial anti‑vibration grade
- Certifications: CE, complies with industrial automation EMC requirements
Core Functions
- Support Modbus master and slave modes to communicate with instruments, drives and remote I/O devices on the serial bus.
- Realize bidirectional data exchange between Modbus network and ControlLogix controller through built-in register mapping area.
- Built-in communication diagnostic function records error codes and status information for quick troubleshooting of serial communication failures.
- Support hot swapping without shutting down the whole rack, minimizing production downtime during module replacement.
- Chassis plug-in design facilitates installation, configuration and maintenance in standard industrial control cabinets.
- Industrial anti-interference hardware design ensures stable data transmission in complex electromagnetic field environments.
Application Scenarios
- Spare-part replacement for ControlLogix automation cabinets in petrochemical, power, water treatment and manufacturing sites.
- Protocol conversion gateway hardware connecting ControlLogix PLC with Modbus field instruments and variable frequency drives.
- Maintenance backup inventory for renovation and after-sales maintenance projects of ProSoft communication accessories.
- Matching communication module cooperating with ControlLogix CPU, power supply and analog/digital I/O modules.
- Retrofit replacement for aged modules with serial communication interruption and data mapping abnormal faults.
Global aftermarket spare supply for automation maintenance teams maintaining industrial control equipment worldwide.

Tags: ProSoft MVI56-MCM Modbus Communication Module
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