Allen-Bradley 1785-BCM Backup Communication Module

Allen-Bradley 1785-BCM
Allen-Bradley 1785-BCM
Allen-Bradley 1785-BCM

1785-BEM Product datasheet  

Model number:

1785-BCM

 

Module Type:

Back-up Communication Exp Module

Manufacture:

Allen-Bradley

 

Condition:

Brand New

Range of Product:

PLC-5

 

Lead time:

In Stock

Weight:

0.56k

 

HS CODE:

8537101190

Dimension:

3x14.7x25.8cm

 

MOQ:

1

Product Origin:

USA

 

System:

PLC

Discontinued on:

July 31, 2011

 

Communication Service:

Ethernet router

 

1785-BEM Functional Description


The Allen-Bradley 1785-BCM is a critical legacy communication module designed for use with the PLC5 controller platform. This single-slot module ensures communication redundancy and switchover capabilities, enabling seamless transition between a primary and a stand-by PLC5 processor. It supports high-speed Data Highway Plus (DH+) and Remote I/O (RIO) communication backup via the high-speed serial link (HSSL), with switchover speeds reaching up to 1.2 Megabaud.

 

The 1785-BCM communication module can initiate a switchover in various scenarios, including power failure, processor errors, or faults in the partner module. Additionally, it allows switchover during specific modes, such as manual transitions from RUN to PROGRAM, REMOTE RUN to REMOTE PROGRAM, or when REM RUN and REMOTE TEST modes change. The module also features a 4K-word internal buffer for reliable data handling.

 

Compatible with a range of PLC5 processors, including the PLC-5/15 series B, -5/20, -5/25, -5/30, -5/40, and -5/60, the 1785-BCM communication module  is installed in a 1771 I/O chassis. It's important to note that I/O modules must be installed remotely from the processor and BCM, serving as distributed I/O stations. When setting up the 1785-BCM communication module , the use of a Wiring Arm (catalog number 1771-WG) is required for efficient communication wire termination.

 

The 1785-BCM communication module’s versatility and reliability make it an essential component for enhancing communication and system uptime in PLC5-based systems.


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  •       One Year Warranty

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Classic PLC-5 Family Processor Features


From the family of PLC-5 processors, you can choose the processor(s) that you need for your application. Features common to all Classic PLC-5

processors are:

  1. same physical dimensions
  2.  use of the left-most slot in the 1771 I/O chassis
  3.  can use any 1771 I/O module in the processor-resident local I/O chassis with up to 32 points per module
  4.  same programming software and programming terminals
  5.  same base set of instructions
  6.  ladder programs and SFCs can be used by any of the PLC-5 processors

 

The PLC-5 processor in adapter mode acts as a remote station to the supervisory processor. The adapter-mode PLC-5 processor can monitor and control its processor-resident local I/O while communicating with the supervisory processor via a remote I/O link.

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