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1785-BEM Allen-Bradley

Name: 1785-BEM Allen-Bradley
Brand: Allen Bradley
SKU: 1785-BEM
Price: 825.0 USD
Availability: InStock

$825.00 - $23,469.70

$825.00

$825.00 - $23,469.70

$825.00

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Product Details

Description · Specifications · Product Overview

Specifications provided for reference. Verify critical details against official manufacturer documentation before installation.

Product Overview

The 1785-BEM is a Backup Expansion Module (series A) for the Allen-Bradley PLC-5 platform, designed to mount in the 1771 I/O chassis alongside a Backup Communications Module (such as 1785-BCM). It provides redundant communication and power switchover capability for PLC-5 processors (including PLC-5/15-series B through -5/60). The module integrates into high-availability systems requiring fault-tolerant communication paths and power backup within distributed I/O networks. Typical industrial uses include machine-level redundancy, unscheduled switchover handling, and backup channel support in PLC-5 architecture.

Best Suited For

PLC-5/15 B through /60 redundant configurations
Backup communications channel support in 1771 I/O chassis
On-machine fault-tolerant control installations
Retrofit or maintain legacy PLC-5 systems

Module Type

Backup Expansion Module (Series A)

Compatible PLC Platform

PLC-5 (e.g. /15 B through /60)

Mounting Location

1771 I/O chassis (local)

Backplane Current

0.6 A @ 5 V DC

High-Speed Serial Link (HSSL)

1.2 Megabaud

Technical Specifications

I/O & Electrical

Backplane current

0.6 A @ 5 V DC

Customer relay (resistive)

0.25 A @ 24 V DC

Communication & Power

High-Speed Serial Link speed

1.2 Megabaud

Compatible processors

PLC-5/15 B, -5/20, -5/25, -5/30, -5/40, -5/60

Physical & Environmental

Operating temperature

0 °C to 60 °C (32 °F to 140 °F)

Storage temperature

-40 °C to 85 °C (-40 °F to 185 °F)

Relative humidity

5% to 95% (without condensation)

Certifications

UL ListedCSA Class 1 Div 2

UL - Industrial Control Equipment; CSA - Class 1, Division 2, LR69960C. Includes warning: "Explosion hazard. Do not disconnect while circuit is live unless area is known to be non-hazardous."

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USA Stock

Sourced and shipped from Texas, USA. Never anonymous overseas marketplace stock.

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Rockwell Automation documentation

Access official manuals, datasheets, and lifecycle information for this part directly from Rockwell Automation.

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Must Read: Disclaimer

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