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Allen-Bradley 3150-MCM (1747-KE) is a Prosoft-developed MODBUS communication module for SLC 500 PLCs. This dual-channel interface enables seamless MODBUS RTU master/slave communication between SLC processors and industrial devices. With RS-232/RS-485 connectivity and non-volatile memory, it simplifies integration of legacy SLC systems with MODBUS-compatible sensors, drives, and HMIs in industrial automation applications.
Product Specifications
Core Specifications
Compatibility: SLC 5/03, 5/04, 5/05 processors (1747 backplane)
Protocol Support: MODBUS RTU (Master/Slave) - NOT TCP/IP capable
Channels: 2 independent serial ports:
Baud Rate: 300 to 115.2 kbps (software-configurable)
Data Types: Supports Coils, Inputs, Holding/Input Registers
Key Functional Attributes
Memory Features
Configuration Tools
Diagnostics
Performance Characteristics
Message Processing: Up to 50 MODBUS transactions/second
Data Mapping: 1:1 addressing with SLC data files
Isolation: 1500V RMS optical isolation on RS-485 port
Physical Specifications
Dimensions: 3.94 x 1.97 x 4.33 in (100 x 50 x 110 mm)
Power: 85mA @ 5V DC (backplane powered)
Operating Temp: 0°C to 60°C (32°F to 140°F)
3. Typical Applications
Legacy System Integration: Connecting SLC 500 to MODBUS energy meters
Drive Control: AB PowerFlex drives via MODBUS RTU
HMI Interfacing: Red Lion/Proface panels to SLC systems
Building Automation: BACnet-to-MODBUS gateways
4. Installation Notes
Slot Requirements: Any SLC 500 I/O slot (except 0)
Configuration: Requires RSLogix 500 with M0/M1 files
Wiring: Shielded cable mandatory for RS-485
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