ProSoft MVI56E‑MCM Modbus Master/Slave Communication Module

The MVI56E‑MCM is a Modbus communication interface module designed for Rockwell ControlLogix 1756 PAC rack. It supports both Modbus Master and Modbus Slave modes, bridging data exchange between ControlLogix controller and Modbus‑compatible field devices including drives, meters and remote I/O units.

This module features two independent RS‑485 serial ports and an Ethernet configuration port. It uses backplane data mapping for seamless tag‑based data transfer, widely deployed in oil‑gas, water‑treatment and general‑industry automation control cabinets.

Main Specifications

• Brand: ProSoft Technology; Model: MVI56E‑MCM; Type: Modbus Master/Slave Communication Module
• Applicable Platform: Rockwell ControlLogix 1756 series rack‑based PAC system
• Supported Protocol: Modbus RTU Master / Modbus RTU Slave
• Serial Interfaces: 2 × Isolated RS‑485 serial communication ports
• Configuration Port: RJ45 Ethernet port for module setup, firmware ｕｐｄａｔｅ and web‑diagnostics
• Data Mapping: Bidirectional data mapping between Modbus registers and ControlLogix controller tags
• Installation: Standard 1756 backplane rack‑mount installation
• Power Supply: 5VDC power supplied via ControlLogix rack backplane
• Operating Environment: ‑20℃ ~ +60℃, 5%‑95% RH non‑condensing, industrial grade
• Diagnostic: LED status indicators, built‑in web server for real‑time status viewing
• Certifications: CE, UL, meets general industrial automation EMC standards

Core Functions

• Operate as Modbus master to poll data from Modbus‑RTU slave devices such as transmitters, inverters and power meters.
• Work as Modbus slave to accept read‑write requests from external Modbus host systems for upper‑level data acquisition.
• Dual independent serial ports allow separate communication links to improve field‑network layout flexibility.
• Transparent register‑to‑tag mapping eliminates complex programming for data exchange with ControlLogix CPU.
• Ethernet configuration port supports remote parameter setting, firmware upgrade and online communication fault diagnosis.
• Industrial isolated serial interfaces resist field‑site electromagnetic interference for stable long‑term operation.

Application Scenarios

• Spare‑part replacement for ControlLogix automation cabinets in oil‑gas, water‑treatment, mining and manufacturing plants.
• Protocol gateway for connecting Rockwell PAC with Modbus RTU drives, instruments and third‑party remote I/O devices.
• Maintenance backup inventory for renovation and after‑sales maintenance projects of legacy Modbus‑based automation systems.
• Matching communication module cooperating with ControlLogix CPU, HMI and field‑site Modbus‑RTU equipment.
• Retrofit replacement for old communication modules with data loss, serial port damage and communication timeout faults.
• Global aftermarket spare supply for automation maintenance teams maintaining ProSoft and Rockwell automation equipment worldwide.