ProSoft MVI56-MCM

Product Name:​ MVI56 Series Modbus® Master/Slave Communication Module for Allen-Bradley ControlLogix®
  • Brief Introduction:​ A single-slot, backplane-compatible communication module for Rockwell Automation ControlLogix 1756 racks. It enables the ControlLogix processor to act as a Modbus RTU/ASCII Master (polling up to 247 slaves) or Slave on two independently configurable serial ports.
Category:
Description
  • Technical Specifications:
    • Platform:​ Allen-Bradley 1756 ControlLogix (local or remote I/O rack)
    • Processor (module):​ 32-bit ColdFire®, 33 MHz
    • Backplane Current Draw:​ 800 mA @ 5 V DC, 3 mA @ 24 V DC
    • Serial Ports:​ 2 × Configurable RS-232 / RS-485 / RS-422 (DB-9 or screw terminal depending on carrier)
    • Baud Rate:​ 110 bps – 115.2 kbps
    • Data Format:​ 7/8 data bits, 1/2 stop bits, none/even/odd parity
    • Modbus Support:​ RTU & ASCII; Master & Slave simultaneously (Port 1 Master, Port 2 Slave typical); Enron/Daniel floating-point support
    • Data Exchange:​ 5000-word (16-bit) register block mapped to ControlLogix tags via producer/consumer messaging
    • Diagnostics:​ On-board LEDs (Module Status, App Status, Comm LEDs per port); accessible error codes in RSLogix/Studio 5000 tag structure
    • Configuration Tool:​ ProSoft Configuration Builder (PCB)
    • Operating Temp.:​ 0 °C to +60 °C; Storage –40 °C to +85 °C
    • Certifications:​ CE, UL, cUL, ATEX Zone 2 (some versions)
    • Dimensions:​ 115 × 114 × 22 mm; Weight ≈ 0.3 kg
  • Features:​ Zero ladder logic modification required (uses Add-On Instructions); floating-point register mapping; watchdog timer; full diagnostic buffers.
  • Applications:​ Integrate third-party Modbus devices (power meters, drives, flow computers) into ControlLogix; retrofit legacy Modbus networks into modern PAC systems; multi-vendor SCADA/data acquisition bridges.
  • Installation Notes:​ Insert into any unused slot of 1756 chassis with sufficient power budget; download configuration (.cfg) via PCB before first run; terminate RS-485 lines with 120 Ω resistor at farthest node; verify COM port pinout against ProSoft wiring diagram.
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