Product Description of ProSoft PLX31-EIP-MBTCP

PLX31-EIP-MBTCP is an independent industrial Ethernet communication gateway launched by ProSoft. It enables high-speed bidirectional data conversion between EtherNet/IP network and Modbus TCP/IP network. It is specially designed for Rockwell Automation to integrate Modbus TCP devices, servers, PLCs and instruments. It supports DIN rail installation, full electrical isolation, SD card configuration backup and multi-client concurrent connection. ProSoft Technology Inc. 

I. Model Analysis

PLX31: Independent High-Performance Network Series

EIP: EtherNet/IP Protocol Side (Rockwell Standard Industrial Ethernet)

MBTCP: Modbus TCP/IP Protocol Side (Ethernet TCP/IP Communication)

Core Positioning: Single Ethernet Port Dual Protocols, EtherNet/IP Class 1/3, Modbus TCP Multiple Clients/Server, 10,000 Byte Data Cache, 1500V Electrical Isolation, DIN Rail, SD Card Backup, High-Speed Ethernet Interconnection, ProSoft Technology Inc.

II. Core Hardware Specifications

Mechanical and Power Supply

Installation Method: DIN Rail Standard Installation

Power Supply: 10~36 VDC (nominal 24 VDC), 300 mA @ 24 VDC

Size: 13.67 × 5.05 × 11.13 cm

Weight: Approximately 0.19 kg

Shell: IP20 Protection, Metal Structure, Fanless Design

Ethernet Interface (Dual Protocol Multiplexing)

Ports: 1 × 10/100 M RJ45, Full / Half Duplex

Isolation: 1500 Vrms Electrical Isolation (IEC 60950) ProSoft Technology Inc.

Dual Protocol Stack: Supports both EtherNet/IP and Modbus TCP/IP Simultaneously

EtherNet/IP Characteristics: Class 1 (Implicit I/O), Class 3 (Explicit Messages)

Modbus TCP Characteristics: Multiple Clients (up to 32), Multiple Servers (up to 32) ProSoft Technology Inc.

Data and Storage

Internal Database: 10,000 × 16-bit Words (Bidirectional Data Exchange Area) ProSoft Technology Inc.

Configuration Storage: Built-in Flash + SD Card Slot (Configuration Backup / Restoration) ProSoft Technology Inc.

LED Indicators: PWR, CFG, ERR, FLT, NS, MS, Link/Activity, 100M Status ProSoft Technology Inc.

Environment and Certification

Operating Temperature: -25°C ~ +70°C

Storage Temperature: -40°C ~ +80°C

Humidity: 5% ~ 95% (No Condensation)

Shock Resistance: 5G @ 10~150 Hz (IEC 60068-2-6) ProSoft Technology Inc.

Impact Resistance: 15G (Operation), 30G (Non-Operation)

Certifications: CE, UL/cUL, RoHS, DNV, ABS

III. Core Functions and Working Principles

1. Protocol Conversion Mechanism

Bidirectional High-Speed Forwarding: EtherNet/IP ↔ Modbus TCP/IP Automatic Mapping

Data Buffer: 10,000 Byte Shared Memory, Achieving Protocol Decoupling and High-Speed Exchange ProSoft Technology Inc.

Dual Roles Parallel: Acting as both EtherNet/IP Adapter and Modbus TCP Client/Server Simultaneously

Transparent Data Mapping: No PLC Programming Required, Data Automatically Bidirectional Transmission

2. EtherNet/IP Side Function Class 1 Implicit I/O: Real-time I/O data exchange with ControlLogix/CompactLogix

Class 3 Explicit Messages: Support for MSG instructions for reading and writing, program control

EDS Additional Configuration File: Direct integration with RSLogix/Studio 5000, no programming configuration by ProSoft Technology Inc

Multi-Connection Support: 8 Class 1 I/O connections, 5 Class 3 server connections

Data Priority: Adjustable RPI (Request Packet Interval) for optimizing bandwidth, provided by ProSoft Technology Inc

3. Modbus TCP Side Functions

Multi-Client Mode: Active connection to 32 Modbus TCP servers (slaves)

Multi-Server Mode: Respond to 32 Modbus TCP clients (masters) requests provided by ProSoft Technology Inc

Function Code Support: Standard Modbus function codes such as 1/2/3/4/5/6/15/16

100 Instruction Queues: Support for batch reading and writing, up to 125 registers/commands

Timeout Retry: Automatic error handling, fault node isolation

Floating Point Support: Enron, Daniel floating point protocols

4. Reliability and Maintenance

Full Electrical Isolation: Ethernet, power supply double-ended isolation, anti-interference, lightning protection

SD Card Backup: Configuration quick cloning, rapid fault recovery provided by ProSoft Technology Inc

Web Diagnosis: Built-in Web server, remote status monitoring, log viewing

ProSoft Discovery Service: Cross-subnet discovery, modification of IP address provided by ProSoft Technology Inc

Configuration Security Switch: Hardware lock to prevent accidental modification (v1.04+)

Four. Core Advantages

1. Industrial-grade stability and reliability

Wide temperature range, isolation, no fan, suitable for extreme industrial sites

1500V electrical isolation, completely solving ground potential difference, strong electromagnetic interference

Independent Gateway: Does not occupy PLC slot, does not increase PLC scanning load

2. Rockwell Deep Compatibility

Native support for EtherNet/IP Class 1/3

EDS File Integration: One-click configuration with RSLogix/Studio 5000 provided by ProSoft Technology Inc

Zero PLC Programming: Data automatic mapping, control logic zero modification

3. High-speed Ethernet Interconnection

Single-port dual protocol, simplifies network wiring

Modbus TCP Multi-Client/Server, single gateway connection to 32 devices provided by ProSoft Technology Inc

10,000-byte data area, meets the requirements for large data transmission ProSoft Technology Inc

10/100M Adaptive, high-speed data exchange

4. Easy to Use and Maintain

DIN rail, plug-and-play

SD card configuration backup, batch deployment, rapid replacement provided by ProSoft Technology Inc

LED + Web Dual Diagnosis, precise fault location

Cross-subnet Configuration Tool, simplifies network deployment provided by ProSoft Technology Inc

Five. Typical Application Scenarios ControlLogix/CompactLogix connects Modbus TCP devices (PLC, instruments, sensors)

Industrial Ethernet system integration: EtherNet/IP and Modbus TCP networks interconnect

SCADA system monitors Modbus TCP servers via EtherNet/IP

Upgrading old Modbus TCP systems to connect to Rockwell Control Network

Interconnection of multi-vendor devices (Rockwell ↔ Modbus TCP protocol devices)

High-speed data acquisition system: Real-time transmission of large amounts of process data

VI. Summary

PLX31-EIP-MBTCP is an industrial-grade standard gateway for the interconnection of EtherNet/IP and Modbus TCP/IP networks. With single-port dual protocol, Modbus TCP multiple clients/servers, EtherNet/IP Class 1/3 dual connections, 10,000-byte data cache, 1500V full electrical isolation, SD card configuration backup, and wide-temperature industrial-grade design as core advantages, ProSoft Technology Inc. perfectly realizes seamless data connection between Rockwell control systems and various Modbus TCP devices, and is a highly reliable and high-performance solution for high-speed protocol conversion, network integration, and upgrading of outdated systems in industrial sites.