Allen-Bradley 1747-DCM Direct Communications module

The Direct Communication Module, catalog number 1747-DCM, connects any SLC 500  programmable controller with expansion chassis or SLC 500 Modular Programmable Controller to a supervisory Allen-Bradley programmable controller via the RIO Link, providing a distributed processing system. The 1747-DCM allows these supervisory processors to transfer data between one another. The 1747-DCM appears as an RIO adapter to:

l a PLC processor with integral RIO scanner on the RIO Communication Link

l an RIO scanner, catalog number 1771-SN or 1747-SN, on the RIO Communication Link

The 1747-DCM can physically reside on the RIO Link with any other adapter. It is compatible with all RIO scanners. 1747-DCM Modules are connected in a daisy-chain configuration using Belden™ 9463 cable. See the example below.

Manufacturer

Allen Bradley

Category

PLCs

Product Line

SLC 500

Part Number

1747-DCM

Weight

1.00 lbs (0.45 kg)

Operating Temperature

0°C to 60°C (32°F to 140°F)

Module Type

Direct Communication Module (DCM)

Supported Protocol

Remote I/O (RIO)

Transmission rate

57.6K baud at 10,000 ft; 115.2K baud at cable length of 5000 feet

Communication cable

Belden 9463 or any equivalent

Terminating resistor

82 Ohms; 150 Ohms

Compatible controllers

SLC 500 Fixed and Modular style

Operation modes

Standard and non-extended node

LED indicators

FAULT; COMM

Backplane Current

360 mA @ 5VDC

Communication Port

Universal Remote I/O Adapter

Backplane Current (5 Volts)

360 milliamps

Cable

Belden 9463

Connectors

6-Pin Phoenix Connector

UPC

10662073601941

01

Q: How does the AB 1747-DCM facilitate sophisticated data interconnectivity between heterogeneous industrial control platforms?
A: The AB 1747-DCM is engineered as a communication interface module that enables seamless data exchange between SLC 500 controllers and external automation systems, improving interoperability across diverse control architectures.

02

Q: What communication orchestration capabilities distinguish the AB 1747-DCM in multi-vendor automation environments?
A: The AB 1747-DCM supports advanced data transfer functions, allowing industrial facilities to integrate information from multiple control platforms while maintaining reliable and efficient communications.

03

Q: Why is the AB 1747-DCM considered a strategic gateway for legacy system integration and modernization initiatives?
A: The AB 1747-DCM provides a practical mechanism for connecting established SLC 500 systems with newer automation infrastructures, helping organizations extend system functionality without extensive hardware replacement.

04

Q: Which critical engineering considerations should be assessed when deploying the AB 1747-DCM in high-availability industrial networks?
A: When implementing the AB 1747-DCM, engineers should evaluate communication protocol compatibility, network architecture, throughput requirements, environmental conditions, and controller configuration parameters to ensure optimal performance.

05

Q: How can the AB 1747-DCM enhance operational intelligence and diagnostic transparency across industrial processes?
A: The AB 1747-DCM enables efficient access to process and controller data, supporting faster troubleshooting, improved system monitoring, and more informed decision-making throughout the automation lifecycle.

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