- Model: MVI69E-MBS
- Brand: PROSOFT Technology
- Series: 1769 CompactLogix Enhanced Modbus Serial (E-series)
- Core Function: Modbus RTU/ASCII master or slave for CompactLogix 1769 platforms
- Product Type: Enhanced Modbus serial communication module
- Key Specs: 2 serial ports | 500 mA @ 5 V | 60/120/240 word I/O sizes | 10,000 words data
- Condition: New Original (New Surplus)
Product Introduction
PROSOFT MVI69E-MBS Modbus Serial Enhanced Communication Module provides CompactLogix 1769 controllers with dual-port Modbus RTU/ASCII master/slave connectivity to legacy devices, drives, and SCADA systems without external gateways. It occupies one standard 1769 slot and transfers data as scheduled I/O words using Add-On Instructions in RSLogix/Studio 5000 v16+.
The module supports up to 250 commands per port across a 10,000-word data map, includes an Ethernet-free configuration workflow via ProSoft Configuration Builder, and acts as a co-processor to minimize PLC scan impact. Engineers select the 60/120/240-word I/O size during commissioning to balance throughput and controller overhead.
Frequently Asked Questions
Q: Does the MVI69E-MBS support hot-swapping in a CompactLogix rack?
A: Honestly, treat it exactly like other 1769 communication modules and avoid live swaps in production. The backplane supports insertion/removal but dropping Modbus comms will fault dependent interlocks and field devices. Inhibit the module in RSLogix first, confirm process tolerance for losing both serial ports, put the CPU in Program mode, and swap only after verifying 5 V stability across the full 1769 bus.
Q: Is the MVI69E-MBS obsolete, and is there a direct replacement?
A: In our experience, the E-series Enhanced modules like MVI69E-MBS represent the current generation for 1769 CompactLogix Modbus serial, positioned ahead of older MVI69-MBS units. Check PROSOFT lifecycle status before new designs; if migration becomes necessary, expect guidance toward newer CompactLogix-native or gateway solutions but confirm I/O image sizes, command limits, and AOI compatibility before treating any successor as plug-and-play.
Q: Will I lose my Modbus configuration when replacing the module?
A: The most common mistake is skipping the configuration backup entirely. Before removal, connect the supplied CFG cable to a PC running ProSoft Configuration Builder, export the complete project file including command lists, port settings, and 10,000-word data mapping, then archive your RSLogix AOI modifications. After installing the new MVI69E-MBS, restore the configuration, match the I/O size (60/120/240 words), download to the module, and validate serial activity LEDs and controller tags before Run mode.
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