Description
ProSoft PLX31-EIP-MBS4 Product Introduction
- Model: PLX31-EIP-MBS4
- Brand: ProSoft (ProSoft Technology Inc.)
- Series: ProSoft PLX31 Protocol Conversion Gateway Series
- Core Function: EtherNet/IP to Modbus serial communication
- Type: Communication Module (Protocol Conversion Gateway)
- Key Specs: EtherNet/IP, 4 serial ports, Modbus RTU/ASCII
- Supply Status: in stock
- Stock: 16
- Warranty: 2 years
- Ship From: United States

ProSoft PLX31-EIP-MBS4
Applicable System
This module is a dedicated protocol conversion gateway for ProSoft PLX31 Series, a key component for connecting EtherNet/IP PACs or devices with Modbus serial devices. Honestly, it’s way more flexible than the 3150-MCM and MVI56E-MCM we talked about before—it’s not tied to a single PLC platform, and it has more serial ports, making it perfect for scenarios where modern Ethernet technology needs to integrate with traditional Modbus serial devices[1].It’s mainly applied in various industrial automation scenarios, especially in factories that have both EtherNet/IP and Modbus serial devices—like automotive manufacturing, chemical plants, and large-scale logistics sorting systems. Unlike the 3150-MCM (SLC-compatible, 2 serial ports) and MVI56E-MCM (ControlLogix-compatible, 2 serial ports), this PLX31-EIP-MBS4 has 4 serial ports, can connect up to 400 Modbus devices, and works with any EtherNet/IP-compatible system, not just AB PLCs[1].You’ll often see it in integrated industrial control systems, SCADA systems, and mixed-network automation setups, acting as a bridge between EtherNet/IP controllers (like Rockwell ControlLogix, CompactLogix) and Modbus serial instruments. It enables high-speed bidirectional data transmission, helping reduce the number of gateways needed and shortening debugging time[1].Q: What specific systems can it be used with? A: It’s fully compatible with EtherNet/IP PACs/devices, Modbus RTU/ASCII serial devices, and various industrial automation systems, ideal for mixed-network scenarios needing seamless protocol conversion[1][5].
Main Functions
To be honest, this module’s core job is to convert protocols between EtherNet/IP and Modbus serial networks—it’s sturdy, versatile, and more capable than the 3150-MCM and MVI56E-MCM, especially in large-scale device connection scenarios. It doesn’t just do basic communication; it has extra features that make on-site use way easier.
- Dual-protocol conversion: Enables high-speed bidirectional data transmission between EtherNet/IP and Modbus RTU/ASCII protocols, ensuring seamless communication between different networks[1].
- Quad serial port support: Equipped with 4 independent serial ports, supporting up to 400 Modbus devices in total—way more than the 2 ports of 3150-MCM and MVI56E-MCM[1].
- Convenient configuration: Has a 10/100MB Ethernet port, and supports ProSoft Discovery Service, allowing you to view the gateway and change its IP address even if you’re not on the same subnet[1][5].
- Data management: Supports data priority management and has an SD card slot for storing configuration files, making backup and disaster recovery simple[1][5].
- Easy integration: Integrates with common industrial control software, no complex programming needed, and has a built-in embedded EDS configuration file for quick setup[1].
There’s one point to note: Unlike the 3150-MCM (SLC-only) and MVI56E-MCM (ControlLogix-only), this PLX31-EIP-MBS4 is a standalone gateway, not tied to a specific PLC platform. It has 4 serial ports (vs. 2 for the other two) and supports EtherNet/IP-to-Modbus conversion, but it doesn’t have PROFIBUS support like the MVI56E-MCMR—it’s focused on EtherNet/IP and Modbus serial integration.

ProSoft PLX31 Protocol Conversion Gateway Series
Detailed Technical Specifications
Let’s get down to the specific specs—no fancy jargon, just practical details that matter for on-site use. I’ll list them clearly, and also add a simple comparison with the similar 3150-MCM and MVI56E-MCM for you to distinguish at a glance:
- Communication Protocol: EtherNet/IP, Modbus RTU/ASCII (3150-MCM/MVI56E-MCM only support Modbus RTU/ASCII; no PROFIBUS like MVI56E-MCMR), dual-protocol conversion[1][5]
- Serial Ports: 4 independent serial ports (vs. 2 for 3150-MCM/MVI56E-MCM), supporting up to 400 Modbus devices total[1]
- Baud Rate: 110 baud to 115.2kbps (same as 3150-MCM/MVI56E-MCM), adjustable for different on-site needs
- Ethernet Port: 10/100MB Ethernet port (same as MVI56E-MCM/MCMR; 3150-MCM has no Ethernet port), for communication and configuration[1][5]
- PLC Compatibility: Compatible with any EtherNet/IP-compatible PAC/device (3150-MCM: AB SLC; MVI56E-MCM: AB ControlLogix), not tied to a single platform[1][5]
- Configuration Tools: ProSoft Configuration Builder, ProSoft Discovery Service (3150-MCM only supports serial configuration; MVI56E-MCM/MCMR support similar tools)[1][5]
- Storage Function: Built-in SD card slot for configuration file backup (3150-MCM/MVI56E-MCM have no SD card support)[1][5]
- Environmental Protection: No conformal coating (same as 3150-MCM/MVI56E-MCM; MVI56E-MCMXT has conformal coating), for standard industrial environments
- Operating Temperature: -25℃ ~ 70℃ (vs. 0℃~55℃ for 3150-MCM/MVI56E-MCM), wider temperature range[5]
- Storage Temperature: -40℃ ~ 85℃ (same as 3150-MCM/MVI56E-MCM), suitable for long-term storage
- Power Supply: Wide input power range (vs. fixed 5VDC for 3150-MCM/MVI56E-MCM), adapting to different on-site power conditions[1]
- Weight: 2.8 lbs (1.27 kg) (lighter than MVI56E-MCM/MCMR’s 3.0 lbs, heavier than 3150-MCM’s 2.5 lbs), compact design
- Data Transmission: High-speed bidirectional transmission, response time low to 1ms (faster than 3150-MCM/MVI56E-MCM)[5]
- Additional Features: Data priority management, embedded EDS file, IP address remote modification (3150-MCM/MVI56E-MCM have no these features)[1][5]
- Shock Resistance: 30g operational (same as MVI56E-MCM/MCMR; 3150-MCM is 25g), durable for industrial use
- Device Capacity: Supports up to 400 Modbus devices (3150-MCM/MVI56E-MCM support far fewer), suitable for large-scale scenarios[1]
To sum up the key differences: The PLX31-EIP-MBS4 is a standalone protocol conversion gateway, supporting EtherNet/IP-to-Modbus serial conversion, with 4 serial ports and wide compatibility, ideal for mixed-network large-scale scenarios; the 3150-MCM is a SLC-compatible, 2-port serial-only module, simple and cost-effective for SLC-based basic communication; the MVI56E-MCM is a ControlLogix-compatible, 2-port serial-only module, similar to 3150-MCM but for ControlLogix. Choose based on your protocol needs, PLC platform, and device quantity[1][5].
