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ProSoft MVI69-MCM | CompactLogix Modbus Master/Slave Serial Communication Module In Stock

ProSoft MVI69-MCM | CompactLogix Modbus Master/Slave Serial Communication Module In Stock

Original price was: $5,688.00.Current price is: $5,477.00.

Parameter Value
Part Number MVI69-MCM
Form Factor 1769 single slot CompactLogix module
Backplane Load 800 mA @5 VDC, power distance rating = 2
Serial Ports 2 × configurable ports (P1, P2), RJ45 with DB9 adapters
Serial Physical RS232 / RS422 / RS485 (jumper selectable), 500V optical isolation
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Description

At-A-Glance Executive Brief

  • Model: MVI69-MCM
  • Brand: ProSoft Technology
  • Part Type: Modbus Master/Slave serial communication module (1769 single-slot form factor)
  • Lifecycle status: Legacy / Obsolete; stocked for brownfield Rockwell CompactLogix retrofits
  • System compatibility: Rockwell CompactLogix, MicroLogix 1769-LRP, RSLogix 5000, 1769 backplane
  • Weight: 0.18 kg

 

Technical Introduction

Failure of the MVI69-MCM breaks serial Modbus communications between the CompactLogix PAC and field Modbus devices, resulting in loss of sensor readings, valve control, and DCS/SCADA data exchange. The MVI69-MCM is an in-chassis Modbus serial interface module designed for Rockwell CompactLogix 1769 rack. It provides two independently configurable serial ports supporting Modbus RTU and Modbus ASCII. Each port can be individually set as Modbus Master or Modbus Slave. The module acts as a protocol gateway, transferring data between the 1769 backplane and Modbus field instruments, transmitters, drives, meters and legacy PLCs. It supports Enron / Daniel floating-point mapping and contains internal register database for data buffering. It uses optical isolation between serial ports and PLC backplane to suppress ground loop noise. RSLogix5000 UDT and sample ladder logic simplify integration with CompactLogix tags. Process, water treatment, power and manufacturing plants keep spare MVI69-MCM modules to reduce downtime for legacy CompactLogix systems during maintenance and migration.

  • Best Suited For
    • Rockwell CompactLogix / MicroLogix 1769 automation racks
    • Serial Modbus RTU/ASCII master or slave connection to field instruments, VFDs, flow meters and remote RTUs
    • Direct drop-in replacement for existing ProSoft MVI69-MCM Modbus serial communication hardware

 

Core Technical Specifications

Parameter Value
Part Number MVI69-MCM
Form Factor 1769 single slot CompactLogix module
Backplane Load 800 mA @5 VDC, power distance rating = 2
Serial Ports 2 × configurable ports (P1, P2), RJ45 with DB9 adapters
Serial Physical RS232 / RS422 / RS485 (jumper selectable), 500V optical isolation
Protocols Modbus RTU, Modbus ASCII; Enron/Daniel float support
Mode Each port independent: Master or Slave
Configuration Port CFG RS232 port for module setup and diagnostics
Operating Temperature 0°C ~ 60°C
Storage Temperature -40°C ~ 85°C
Humidity 5%–95% non-condensing
Diagnostics LEDs Module status, APP, serial port Tx/Rx, CFG port activity
Environmental Details Please refer to the OEM datasheet for complete environmental tolerances.

 

Field Engineer’s Tech Notes

  • Module configuration is stored inside the MVI69-MCM. After replacement, upload the saved configuration file and verify Modbus command list and register mapping.
  • Supports RIUP (hot-swap) within the CompactLogix rack, but verify backplane health before removing.
  • RS485/422 field wiring must use shielded twisted pair with single-point shield grounding to avoid ground loop noise.
  • Select RS232/422/485 via the onboard jumpers; incorrect jumper setting causes no communication or port damage.
  • Match register byte/word ordering for floating-point values (Enron/Daniel) otherwise analog readings will be corrupted in PLC tags.
  • Use ESD precautions when handling the module PCB.

 

Adaptive QA & Testing Protocol

Each MVI69-MCM is bench tested on a CompactLogix 1769 rack with RSLogix5000. We load the saved module configuration and verify backplane communication and tag mapping. Both serial ports are tested in Modbus Master and Slave modes using Modbus RTU/ASCII simulators. Floating-point register mapping (Enron/Daniel) is validated. Port jumper modes (RS232/422/485) are checked. Front panel LED status, internal database and diagnostic counters are inspected. PCB visual inspection, connector continuity test are performed. Full test reports or bench test video clips are available upon request.

 

Buyer’s FAQ

Q: What is ProSoft MVI69-MCM used for? A: It is a CompactLogix in-chassis Modbus serial gateway. It enables Rockwell CompactLogix PLC/PAC to communicate over RS232/422/485 with Modbus RTU/ASCII field devices as Modbus Master or Slave.

Q: What warranty applies for refurbished and NSFP MVI69-MCM? A: Refurbished and NSFP units carry a 12-month hardware warranty. Coverage excludes ESD damage, incorrect jumper settings, wrong configuration download and field wiring transients.

Q: What lead time should I expect? A: Stocked units ship 3–7 business days. If inventory is depleted, lead time increases while we source surplus ProSoft MVI69-MCM modules.

Q: What is the difference between MVI69-MCM and MVI69-MNET? A: MVI69-MCM is for serial Modbus RTU/ASCII over RS485/422/232; MVI69-MNET is Modbus TCP over Ethernet.

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