Overview
The Allen-Bradley 1747-DCM is a Direct Communication Module designed for SLC 500 controllers. This Direct Communication Module has 1746 Backplane Communication and a Universal Remote I/O Adapter Communication Port. It distributes the SLC-500 processor located on the Allen-Bradley RIO Communication Link and lets them transfer data between each other. Each SLC 500 Controller can be connected to the Allen-Bradley Programmable Controller via the RIO Link, providing a distributed processing system.
Key Features
- Single slot module with a backplane current consumption of 360 milliamperes @ 5 Volts DC
- Status LED indicators including FAULT LED and COMM LED
- Serves as a bridge for data exchange on Allen-Bradley RIO networks, supporting scalable and coordinated automation architectures
- DIP switch configuration allows the DCM to interpret the RIO system address correctly
- Operates efficiently between 32°F and 140°F, meeting NEMA ICS 2-230 standards
Technical Specifications
- Backplane Current @ 5V DC: 360 milliamperes
- Backplane Current @ 24V DC: 0 milliamperes
- Thermal Dissipation: 1.80 Watts
- Operating Temperature Range: 32°F to 140°F (0°C to 60°C)
- Chassis Slots: 1 slot
- LED Status Indicators: FAULT, COMM
- Certifications: UL Marked, cUL Marked, CE Marked, C-Tick
- Communication Protocol: Allen-Bradley RIO (Remote Input/Output) Link
Typical Applications
Typical applications include manufacturing systems and process control installations requiring centralized supervision with distributed I/O control. The 1747-DCM is used in applications where:
- Distributed SLC 500 controllers need communication with a supervisory processor
- Remote I/O adapter connectivity is required across multiple sites or zones
- Peer-to-peer messaging between SLC processors is needed
- Scalable, networked automation architectures are being implemented
Compatibility & Replacements
Compatible With
- SLC 500 fixed and modular controllers
- SLC 500 chassis (single slot installation)
- Allen-Bradley RIO (Remote I/O) networks
- 1746 and 1747 I/O module backplanes
- Remote I/O scanner configurations
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. Rockwell Automation discontinued this product line in 2018; industrial surplus and refurbished units may be available through authorized distributors.
Works With
- Allen-Bradley SLC 500 programming software (RSLogix 500)
- Remote I/O network communication protocols
- Belden 9463 cabling for RIO connectivity
- PLC-5 distributed processing configurations
