ProSoft MV156-MCM FLEX I/O Modbus Communication Module

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Manufacturer: ProSoft
Product No.: MV156-MCM
Country of origin:United States
Product Type: Modbus Communication Modules
Payment: T/T, Western Union
Weight: 2000g
Shipping port: Xiamen
Warranty: 12 months

Description

Interfacing serial Modbus networks directly with the Rockwell Automation FLEX I/O backplane is efficiently handled by the ProSoft MV156-MCM Modbus Communication Module. This hardware module functions as a critical bridge, allowing FLEX I/O adapters to exchange industrial data with Modbus RTU or ASCII transmission modes. Operating as either a Master or a Slave, the module provides reliable serial telemetry integration for legacy field instruments, power monitors, and variable speed drives within a rugged, space-saving form factor. Engineers can deploy this module to bypass complex gateway solutions and achieve direct-to-chassis backplane data mapping.

Features

Dual-Protocol Support: Full compatibility with Modbus RTU and ASCII protocols in both Master and Slave modes.
Backplane Integration: Mounts directly into standard Rockwell Automation FLEX I/O terminal bases.
Comprehensive Diagnostic LEDs: Front-panel indicators provide immediate visual feedback on module status, serial activity, backplane transfer rates, and system errors.
Dedicated Configuration Port: Features an RJ45 physical serial port (configurable as RS-232 via the supplied DB-9M cable) to simplify local diagnostics and parameters upload.

Applications

Power Distribution Systems: Monitoring electrical parameters from digital protective relays and power meters on serial Modbus networks.
Oil, Gas, and Petrochemical Plants: Gathering remote custody transfer data from flow computers and RTUs.
Process Plant Modernization: Integrating legacy serial transmitter manifolds into newer Ethernet/IP or ControlNet-based FLEX I/O architectures.

Technical Specifications

Parameter	Specification Value
Manufacturer	ProSoft Technology
Model Number	MV156-MCM
Backplane Current Draw	800 mA at 5 VDC, 3 mA at 24 VDC
Operating Temperature	0 to 60 degC (32 to 140 degF)
Storage Temperature	-40 to 85 degC (-40 to 185 degF)
Relative Humidity	5% to 95% (non-condensing)
Mechanical Vibration	5 g from 10 to 150 Hz
Mechanical Shock	30 g Operational, 50 g Non-operational
CFG (Configuration) Port	RJ45 (RS-232 physical layer, DB-9M with supplied cable)
Diagnostic LEDs	Module Status, Backplane Transfer Status, Application Status, Serial Activity
Shipping Weight	2.0 kg

Empirical Engineering Insights

Alternative Models & Compatibility

The MV156-MCM is optimized for mounting onto standard FLEX I/O 1794 terminal bases. Ensure your system's network adapter module (such as Ethernet/IP, ControlNet, or Profibus-DP adapters) has sufficient power headroom, as this module draws significant current compared to digital input blocks.

Application Pitfalls & Engineering Notes

Power Budget Planning: Drawing 800 mA at 5 VDC directly from the backplane can easily overload a standard 1794-APB or 1794-AENT power budget if several analog and communication modules are combined in the same chassis. Always calculate the total chassis backplane current draw to prevent intermittent initialization failures or communication drops.

Commissioning & Wiring Tips

Always use high-quality shielded twisted-pair (STP) cabling for RS-485 Modbus runs. For long serial runs, ensure 120-ohm termination resistors are installed across the TX/RX terminals at the physical ends of the network segments to minimize signal reflections and communication timeouts.

Installation Guidelines

CRITICAL WARNING: Disconnect all power sources before inserting or removing modules from the FLEX I/O backplane. Performing any hardware manipulation under live electrical load can cause component damage, invalid data writes on the Modbus serial bus, or severe localized electrical arcing.

Verify that the target 1794 terminal base is securely mounted to the DIN rail and that the backplane interconnect plug is correctly aligned.

Align the module guides with the terminal base slot and press firmly down until the module latch clicks into place, locking it onto the base.

Connect your RS-232 diagnostic cable to the CFG port or run the RS-485 Modbus field network lines directly to the matching terminals on the base, ensuring proper polarity and shield ground connections.

Key Features:

#Modbus Communication Modules #ProSoft FLEX I/O

What is the backplane current draw of this Modbus communication module?

The module draws 800 mA at 5 VDC and 3 mA at 24 VDC from the backplane. Ensure your FLEX I/O power supply has adequate capacity to handle this load.

Does this module support both Modbus RTU and ASCII protocols?

Yes. It supports both Modbus RTU and ASCII formats in both Master and Slave operating modes.

What is the purpose of the CFG port on the front panel?

The CFG port is an RJ45 physical interface configured for RS-232 serial communication. Using the supplied DB-9M cable, it is used for local hardware configuration, troubleshooting, and firmware updates.

What are the recommended environmental conditions for reliable operation?

The module operates safely in temperatures between 0 and 60 degC, with a non-condensing relative humidity range of 5% to 95%.

Global Express Shipping

Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).

For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .

TECHNICAL SPECIFICATIONS

Country of origin

ProSoft MV156-MCM FLEX I/O Modbus Communication Module