Product Details

The ProSoft MVI56-MNETR is a single-slot 1756 ControlLogix backplane communication module, built as a Modbus TCP client and server interface with reduced I/O data block, specially optimized for remote rack and redundant ControlLogix processor systems. It enables Rockwell ControlLogix PACs to exchange data with Modbus TCP compatible equipment including Modicon PLCs, flow transmitters, pressure gauges, power meters, variable frequency drives and third-party process instruments. The reduced data block design lowers backplane data load, which is perfect for remote chassis deployed on ControlNet or EtherNet/IP networks, avoiding backplane bandwidth overload and improving communication stability for redundant control systems. It supports simultaneous client and server operation, multiple Modbus TCP connections, and covers standard Modbus function codes for reading and writing coils, discrete inputs, holding registers and input registers. The module carries one 10/100Mbps auto-MDIX Ethernet port for Modbus TCP network connection, and it supports local and remote configuration, diagnostics and firmware update over the Ethernet port. Equipped with CIPconnect technology, it allows engineers to access and configure the module through Rockwell CIP networks conveniently. It integrates sample add-on instructions and UDT data types for RSLogix 5000, which greatly cuts down programming work and shortens commissioning time. It supports flexible register mapping, floating-point data conversion and user-defined polling command sequences. Built-in diagnostic counters track connection status, message error count and timeout events, helping technicians troubleshoot Modbus network faults quickly. The module communicates with the ControlLogix CPU over the 1756 backplane independently, and its data exchange process will not interrupt the main control logic or occupy processor resources. It is backward compatible and can be replaced by the upgraded MVI56E-MNETR without modifying existing ladder logic. A conformal coated version is optional for humid, dusty and corrosive industrial environments. This legacy module is widely deployed in chemical, water treatment, oil and gas, power distribution and factory process automation retrofit projects.

This module fits standard 1756 ControlLogix chassis backplane, consumes power from the ControlLogix rack power supply. LED indicators display module run status, backplane activity, Ethernet link and Modbus communication status for on-site inspection. The operating temperature range is 0°C to 60°C, storage temperature ranges from -40°C to 85°C, relative humidity 5% to 95% non-condensing. It meets industrial shock and vibration standards and has UL and CE certifications. It supports configuration file backup and fast recovery for module replacement during maintenance.

This reduced data block Modbus TCP communication module is widely applied in redundant ControlLogix systems, remote I/O rack projects, water treatment process control, oil and gas skid monitoring and power plant auxiliary measurement systems. It establishes stable data interconnection between Rockwell ControlLogix and Modbus TCP field devices while reducing backplane transmission pressure. As a reliable legacy Modbus communication spare part, the MVI56-MNETR retains original field wiring and instruments and effectively reduces the renovation cost of cross-protocol automation integration.