1785BCM

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Overview of Allen-Bradley 1785-BCM Backup Communication Module

The Allen-Bradley 1785-BCM is a backup communication module designed for PLC-5 systems, providing redundancy and high-speed communication between PLC processors. It features one High-Speed Serial Link (HSSL) interface and two DH+/Remote I/O communication interfaces. The module enables seamless switchover between processors to ensure system reliability during processor or equipment failure.

Key Features

  • Single-slot module for installation in 1771 I/O chassis.
  • High-Speed Serial Link communication at 1.2 Megabaud.
  • Two DH+/Remote I/O (RIO) interfaces for network redundancy.
  • Compatible with multiple PLC-5 models: 5/15 series B, 5/20, 5/25, 5/30, 5/40, and 5/60.
  • Conformal coating for industrial environmental protection.
  • Diagnostic and status LED indicators for each communication channel.
  • Requires no external power supply.
  • Supports up to four modules per system.
  • Typical AC signal delay (off): 29 ± 8 ms; DC signal delay (off): 30 ± 7 ms.
  • Weight: Approximately 0.3 lbs (0.1 kg).

Technical Specifications

Specification Description
Module Type Backup Communications Module
Communication Interfaces 1 High-Speed Serial Link, 2 DH+/riu
Protocol Data Highway Plus (DH+), Remote I/O (RIO)
Communication Speed 1.2 Megabaud
Compatible PLC Models PLC-5/15 Series B, 5/20, 5/25, 5/30, 5/40, 5/60
Backplane Current Approximately 1.0 A @ 5 V DC
Dimensions 4.5 x 12.4 x 6.3 inches (115 x 317 x 160 mm)
Weight 0.3 lbs (0.1 kg)
Enclosure Type Conformal Coated Open Style
LED Indicators One diagnosis/status per communication channel
Max Modules Per System 4
Operating Temperature 0 to 60 °C (32 to 140 °F)
Certifications UL, CSA, CE, NEMA ICS 2-230, EN 50081-2

Applications / Use Cases

The 1785-BCM ensures continuous communication in critical PLC-5 automation systems requiring redundancy to minimize downtime and maintain data integrity. It's widely used in manufacturing, processing plants, and other industrial environments where reliable operations are essential.

1785BCM

$0.00

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Does it come with a warranty?

Yes, All products are offered wth 1-Year warranty.

What is the condition of the product?

All products sold are New & Unused.

How fast is shipping?

All products are delivered within 2-8 business days depending on our stock location.

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