OVERVIEW

Official designation: Allen-Bradley 1747-DCM (SLC 500, Direct Communication Module)

The 1747-DCM is a Direct Communication Module enabling SLC 500 processors to interface with Remote I/O (RIO) networks. It facilitates high-speed data exchange across a RIO link, supporting reliable distributed control.

KEY SPECS SUMMARY

Power: 5V DC backplane, 360 mA

Interfaces / Ports: One RIO BNC connector

Indicators: Run, Fault, RIO Link Status LEDs

Operating Temp: 0 to 60 degrees C

Platform / Compatibility: SLC 500 I/O chassis

Limit: Max communication speed 230.4 Kbaud

Lifecycle: Discontinued

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the primary communication network type supported by the Allen-Bradley 1747-DCM module?

A: The module supports connectivity to the Remote I/O network using a BNC connection.

Wiring & Installation:

Q: What type of connector interface is utilized on the 1747-DCM module for the RIO link connection?

A: The module uses a single BNC type connector for the Remote I/O network link.

Troubleshooting & Compatibility:

Q: What does the RIO Link Status indicator on the module typically display during normal communication?

A: The RIO Link Status LED should indicate a steady or blinking green light during normal network activity.

Replacement & Upgrades:

Q: What modern communication protocol is generally recommended as an alternative to the legacy RIO network protocol for upgrades?

A: Ethernet/IP is the recommended standard protocol for modernizing RIO networks in current Allen-Bradley systems.