PROSOFT 3150-MCM Communication Module

Description

ProSoft 3150-MCM Product Introduction

• Model: 3150-MCM
• Brand: ProSoft (ProSoft Technology Inc.)
• Series: ProSoft 3150 Modbus Communication Module Series
• Core Function: AB PLC and Modbus device communication
• Type: Communication Module (Modbus Interface Module)
• Key Specs: Modbus RTU/ASCII, 2 serial ports, 115.2kbps
• Supply Status: in stock
• Stock: 13
• Warranty: 18 months
• Ship From: United States

PROSOFT 3150-MCM

Applicable System

This module is a dedicated Modbus communication module for ProSoft 3150 Series, a key component for connecting Allen-Bradley (AB) PLCs with Modbus field devices. Honestly, it’s a more targeted module than the MVI56E-MCMR and MVI56E-MCM we talked about earlier—not for ControlLogix systems, but specifically designed to work with AB’s SLC series PLCs, solving the protocol conversion problem between AB PLCs and Modbus instruments[3].It’s mainly applied in industrial automation scenarios that use AB SLC series PLCs, especially in water treatment, pump station control, and small to medium-sized industrial control systems. Unlike the MVI56E-MCMR (multi-protocol, ControlLogix-compatible) and MVI56E-MCM (serial-only, ControlLogix-compatible), this 3150-MCM is tailored for AB SLC platforms, focusing on simple and stable Modbus serial communication, making it ideal for scenarios where AB PLCs need to connect with Modbus RTU/ASCII devices like motor protection devices[3].You’ll often see it in water plant pump station distributed control systems, small-scale DCS systems, and SLC-based automation setups, connecting AB SLC PLCs with Modbus-compatible instruments (such as Sepam2000 motor protection devices). It acts as a protocol bridge, enabling AB PLCs to communicate with Modbus networks seamlessly, without complex programming[3].
Q: What specific systems can it be used with?
A: It’s fully compatible with Allen-Bradley SLC series PLCs, Modbus RTU/ASCII devices, and small-scale industrial control systems, ideal for scenarios that need stable Modbus communication with AB SLC platforms[1][3].

Main Functions

To be honest, this module’s core job is to realize protocol conversion and data transmission between AB SLC PLCs and Modbus devices—it’s simple, reliable, and more targeted than the MVI56E series modules, which are designed for ControlLogix systems. It doesn’t have fancy multi-protocol support, but it does its basic job perfectly.

• Modbus dual-mode support: Compatible with both Modbus RTU and ASCII transmission modes, each of the 2 serial ports can be independently set as master or slave mode[3].
• Dual serial port communication: Equipped with 2 independent serial ports (RS232/RS485 compatible), supporting baud rates up to 115.2kbps, suitable for multi-device connection[3].
• Function code support: When set as master mode, it supports 8 Modbus function codes (01, 02, 03, 04, 05, 06, 15, 16) and can send up to 100 custom request commands; when set as slave mode, it supports 9 function codes[3].
• Buffer management: Has a 4000-byte data storage buffer, divided into data, instruction, and parameter setting areas, realizing cyclic data refresh between PLC and Modbus devices[3].
• Easy integration: Integrates with AB SLC PLCs via input/output image files, no extra programming needed; supports cyclic data block transmission, ensuring stable data exchange[3].

There’s one point to note: Unlike the MVI56E-MCMR (multi-protocol, ControlLogix-compatible) and MVI56E-MCM (serial-only, ControlLogix-compatible), this 3150-MCM is only compatible with AB SLC series PLCs, not ControlLogix systems. It’s a basic serial communication module, no Ethernet or multi-protocol support, but it’s more cost-effective for SLC-based simple Modbus communication.

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 MVI56E-MCMR and MVI56E-MCM for you to distinguish at a glance:

• Communication Protocol: Modbus RTU/ASCII (MVI56E-MCMR adds Modbus TCP/IP and PROFIBUS DPV1; MVI56E-MCM same as 3150-MCM), no Ethernet protocol support
• Serial Ports: 2 independent serial ports (RS232/RS485 compatible) (same as MVI56E-MCMR/MCM), each can be master or slave[3]
• Baud Rate: 110 baud to 115.2kbps (vs. max 12Mbps for MVI56E-MCMR; same as MVI56E-MCM), standard serial communication speed[3]
• Function Codes: Master mode: 8 function codes; Slave mode: 9 function codes (MVI56E-MCMR/MCM support more function codes), meeting basic Modbus communication needs[3]
• Data Buffer: 4000-byte storage buffer (vs. 10,000 registers for MVI56E-MCMR/MCM), divided into data, instruction, and parameter areas[3]
• Ethernet Port: No Ethernet port (MVI56E-MCMR/MCM both have 10/100MB Ethernet ports for configuration), configuration via serial port
• PLC Compatibility: Compatible with Allen-Bradley SLC series PLCs (MVI56E-MCMR/MCM compatible with ControlLogix systems, 1756 backplane)[1][3]
• Environmental Protection: No conformal coating (same as MVI56E-MCM; MVI56E-MCMXT has conformal coating), for standard industrial environments
• Operating Temperature: 0℃ ~ 55℃ (vs. 0℃~60℃ for MVI56E-MCMR, 0℃~55℃ for MVI56E-MCM), standard temperature range
• Storage Temperature: -40℃ ~ 85℃ (same as MVI56E-MCMR/MCM), suitable for long-term storage
• Power Supply: 5VDC, 500mA current load (vs. 800mA for MVI56E-MCMR/MCM), lower power consumption
• Weight: 2.5 lbs (1.13 kg) (lighter than MVI56E-MCMR/MCM’s 3.0 lbs), more compact
• Configuration Method: Via serial port and PLC programming software (MVI56E-MCMR/MCM support Ethernet configuration and ProSoft Configuration Builder), simpler configuration
• Backward Compatibility: Compatible with early Modbus communication modules (same as MVI56E-MCMR/MCM), no need to change existing programs
• Shock Resistance: 25g operational (vs. 30g for MVI56E-MCMR/MCM), durable for general industrial use
• Additional Functions: Supports broadcast request in master mode (MVI56E-MCMR has extra PROFIdrive functions; MVI56E-MCM has no extra functions)[3]

To sum up the key differences: The 3150-MCM is a SLC-compatible, serial-only Modbus communication module, simple, cost-effective, designed for AB SLC series PLCs and basic Modbus communication; the MVI56E-MCM is a ControlLogix-compatible, serial-only version, similar in function but for different PLC platforms; the MVI56E-MCMR is a multi-protocol, ControlLogix-compatible version, with Ethernet and PROFIBUS support, more versatile but more expensive. Choose based on your PLC platform and communication needs[3].