ProSoft MVI56E-MNET/MNETXT Modbus TCP/IP Enhanced Communication Module

I. Product Overview

The MVI56E-MNET/MNETXT is a high-performance three-in-one Modbus communication gateway specially designed by ProSoft Technology for the Rockwell ControlLogix platform. Its core function is to provide a 1 Ethernet (Modbus TCP) + 2 Serial (Modbus RTU/ASCII) fully isolated interface for the ControlLogix controller. Each interface can be independently configured as a client (master station) or a server (slave station), enabling seamless and high-speed interconnection between Rockwell systems and various Modbus devices. MNET is the standard version, while MNETXT is the wide-temperature enhanced version. 

II. Model Code Interpretation

MVI56E: Enhanced inRAx series, ControlLogix 1756 single-slot enhanced module

MNET: Modbus TCP/IP Network Communications, Modbus TCP/IP network communication

XT: Extreme Environment, wide temperature / enhanced version

III. Core Technical Parameters

(1) Hardware Specifications

Compatible platforms: Rockwell ControlLogix 1756 series chassis (local / remote chassis)

Slot occupancy: Single slot (1756 standard size)

Backplane power consumption: 800mA @ 5VDC; 3mA @ 24VDCProSoft Technology Inc

Ethernet Port (ETH):

1 10/100 Mbps adaptive RJ45 port, supporting Auto-MDIX

Optical isolation: 2500Vrms

Support Modbus TCP Client/Server, CIPconnect, Web Server

Serial Port (SER):

2 Fully independent, 2500Vrms optical isolation serial ports

Interface: RS-232/422/485 software configurable

Baud rate: 300 ~ 115.2 kbps

Support Modbus RTU/ASCII Master/Slave

Data buffer: 10,000 bytes (16 bits) shared register area, supporting floating point / long integer data mapping

Status indicator:

OK, APP, ERR three-color LED status lights ProSoft Technology Inc

4-character scrolling alphanumeric LED display screen ProSoft Technology Inc

Environmental indicators:

Operating temperature: 0°C ~ +60°C (MNET); -25°C ~ +70°C (MNETXT) ProSoft Technology Inc

Storage temperature: -40°C ~ +85°C ProSoft Technology Inc

Vibration: 5g @ 10~150Hz; Shock: 30g (running) / 50g (non-running) ProSoft Technology Inc

Humidity: 5% ~ 95% (no condensation) ProSoft Technology Inc

Protection (MNETXT): Full board coating, anti-corrosion, dustproof, moisture-proof

Certifications: CE, UL, cURus, RoHS, ATEX (MNETXT)

(II) Communication and Protocol Parameters

Supported protocols: Modbus TCP, Modbus RTU, Modbus ASCII

Working mode: Three-port independent configuration (ETH/SER1/SER2) as Client (Master) or Server (Slave)

Client (Client) performance:

Each port supports up to 100 command queues

Support event triggering, periodic polling, command priority, failure retry

Server (Server) performance:

Support up to 20 concurrent connection sessions

Support standard Modbus function codes: 1, 2, 3, 4, 5, 6, 8, 15, 16

Data exchange: Modbus register ↔ ControlLogix tag automatic bidirectional mapping

(III) Software and Management

Configuration software: ProSoft Configuration Builder (PCB) ProSoft Technology Inc

Network discovery: ProSoft Discovery Service (PDS), automatic search of modules ProSoft Technology Inc

Remote management: CIPconnect technology, remote diagnosis, configuration, and upgrade across ControlNet/EtherNet/IP ProSoft Technology Inc

Web management: Built-in Web server, browser access to monitor status, configuration parameters PLC Integration: Add-On Instruction (AOI), Ladder Diagram Examples, RSLogix 5000 / Studio 5000 compatible with ProSoft Technology Inc.

Backward Compatibility: Fully compatible with the old version MVI56-MNET, direct replacement without modifying the program.

Four. Core Product Features

Three-port fully isolated, one machine three networks

1 network port + 2 serial ports, fully optically isolated, supporting Modbus TCP, RTU, ASCII. A single module can connect three physical networks: Ethernet, RS-485, RS-232, significantly reducing the number of modules and lowering wiring costs by 40%.

Strong concurrent processing capability

100 client commands + 20 server sessions concurrent architecture, combined with a 10,000-byte data buffer, data refresh cycle < 10ms, easily handling high-throughput scenarios such as large-scale distributed I/O, SCADA systems, and centralized collection of multiple instruments.

CIPconnect + Web dual remote management

CIPconnect realizes cross-network remote penetration access; built-in Web server supports direct browser monitoring. Engineers do not need to be on-site to complete configuration, diagnosis, firmware upgrade, and improve operational efficiency by 90% ProSoft Technology Inc.

Industrial-grade stability and extreme environment adaptation

Full port electrical isolation completely blocks ground loop. MNETXT version provides **-25°C to +70°C wide temperature range and anti-corrosion coating**, and passes ATEX Zone 2 certification, specially designed for harsh environments such as metallurgy, mining, oil and gas, and offshore platforms.

Seamless integration, plug-and-play

Standard 1756 single slot, hot-swappable design. Provide pre-fabricated AOI, Modbus data automatically mapped to PLC tags. Fully compatible with the old version MVI56-MNET, 2 minutes to complete non-disruptive replacement.

All-round diagnosis, rapid troubleshooting

4-character LED display screen + LED status lights + PCB diagnostic tool + Web interface, providing full-dimensional real-time monitoring of modules, ports, commands, and error codes, fault location precise, and troubleshooting efficient ProSoft Technology Inc.

Five. Typical Application Scenarios

Industrial Automation: ControlLogix ↔ Modbus TCP frequency converter, servo, HMI, PLC

Process Control: SCADA system, DCS, flowmeter, analyzer, temperature controller data acquisition

Energy Management: Smart electricity meter, relay protection device, photovoltaic inverter communication

Intelligent Manufacturing: Robots, vision system, barcode equipment, packaging machinery networking

Upgrade of old systems: Modbus RTU instrument → Modbus TCP network protocol conversion

Distributed systems: Remote I/O, slave PLC, field instrument centralized control

Six. Version Comparison (MNET vs MNETXT) Table

Parameters: MVI56E-MNET (Standard Edition) MVI56E-MNETXT (Enhanced Edition)

Operating Temperature: 0°C ~ +60°C -25°C ~ +70°C

Coating: None Full-panel laminated coating

Safety Certification: Standard industrial certification ATEX / IECEx Zone 2

Applicable Environments: General industrial control cabinets Extreme temperature, high humidity, dust, corrosive environment

VII. Summary of Product Advantages

MVI56E-MNET/MNETXT is the most comprehensive and powerful three-in-one Modbus communication gateway on the ControlLogix platform. Its core value lies in the three-port full isolation, high concurrent processing, dual remote management, extreme environment adaptation, and seamless backward compatibility. It completely solves the complex interconnection problems between Rockwell controllers and various Modbus devices, and is the ultimate solution for Modbus network integration in industrial automation, process control, energy management, and intelligent manufacturing fields.