1785-BCM | Allen-Bradley Back-Up Communication Module
1785-BCM | Allen-Bradley Back-Up Communication Module
1785-BCM | Allen-Bradley Back-Up Communication Module
    1785-BCM | Allen-Bradley Back-Up Communication Module
1785-BCM | Allen-Bradley Back-Up Communication Module

1785-BCM | Allen-Bradley Back-Up Communication Module

Part #: 1785-BCM Manufactured by: Allen-Bradley
$1,735.00
$1,735.00
2 in Stock
Condition: New – Open box
Shipping calculated at checkout.
Product Overview
The Allen-Bradley 1785-BCM is a PLC-5 Back-Up Communication Module designed to ensure system continuity in the event of pr...  Read more
We accept:
  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa
Contact Us!

Talk to a real expert.

phone
+1 (828) 222-3490
email
sales@iqelectro.com
Mon–Sat, 7:00 AM – 8:00 PM (EST)
warranty
IQElectro 2-Year Warranty
Warranty for Product #: 1785-BCM
IQElectro offers a free 2-year warranty on all products. You can trust that every purchase is a reliable investment in the future of your company. Warranty Terms
2-3 Day Free Shipping
Packed Ready to Ship
24/7 Expert Support
Return within 30-Days
IQElectro BBB Business Review
IQElectro is Not an authorized distributor for Allen-Bradley
Original Manufacturer's Warranty Not Covered, This Product is SURPLUS.

Product Description P/N: 1785-BCM

Description / Specifications

Description 

The Allen-Bradley 1785-BCM is a PLC-5 backup communication module designed to provide redundancy and fault tolerance in critical control systems. It supports one High-Speed Serial Link (HSSL) and two DH+/RIO communication interfaces. This module ensures continued communication and system availability in the event of a primary processor or communication failure.

 

 

Technical Specifications

Condition New/Never Used Surplus
Brand Allen-Bradley
Category PLCs / Machine Control
Part Number 1785-BCM
Subcategory Backup Communication Module
Module Type PLC-5 Backup Communications Module
Compatible Chassis 1771 I/O Chassis (Local)
Compatible Processors PLC-5/15 Series B, 5/20, 5/25, 5/30, 5/40, 5/60
High-Speed Serial Link (HSSL) 1 Port, 1.2 Mbaud
DH+/RIO Interfaces 2 Ports
Maximum Modules per System 4
Bus Communications Local PCI 2.3 Compliant
Customer Relay Rating 0.25 A @ 24 V DC (Resistive)
LED Indicators 1 Status/Diagnosis per Channel
Operating Temperature 0…60 °C
External Power Requirement None
Wiring Arm 1771-WG
Coating Conformal Coated
Dimensions (H×W×D) 115 × 317 × 160 mm
Weight 0.1 kg (0.3 lb)
Certifications UL, CSA Class I Div 2

 


Information About 1785-BCM

The 1785-BCM is part of the Allen-Bradley PLC-5 platform and is installed in a local 1771 I/O chassis to support redundant system architectures. It operates as a dedicated backup communications device, maintaining synchronization and readiness to assume communication duties if the primary path becomes unavailable. The module integrates directly with supported PLC-5 processors and uses high-speed serial and DH+/RIO networks to maintain system continuity. It is commonly used in mission-critical industrial applications where uptime, reliability, and controlled switchover are essential.

Key Features:

  • PLC-5 backup communication functionality: Provides redundancy for critical control systems.
  • High-Speed Serial Link interface: Supports HSSL communication up to 1.2 Mbaud.
  • Dual DH+/RIO interfaces: Enables redundant network connectivity.
  • Local chassis installation: Designed for use in 1771 I/O chassis systems.
  • Broad PLC-5 compatibility: Supports multiple PLC-5 processor models.
  • Industrial-grade reliability: Designed for continuous operation in harsh environments.
  • Diagnostic LED indicators: Provides status and channel-level diagnostics.
  • No external power required: Powered directly from the chassis backplane.
  • Conformal coated electronics: Enhances resistance to moisture and contaminants.

The 1785-BCM delivers the reliability and precision required for redundant communication and high-availability PLC-5 automation systems.

Get fast quote and compatibility check
Compatibility check available   ·   Alternative parts suggested
Get a response to your request within 5 minutes
Talk to a real industrial automation specialist.
We verify compatibility, suggest alternatives, and provide fast quotes.
Something went wrong, please try again
Form image
Arty A.
Senior Sales Manager
Daniel S.
Parts Specialist
Request successfully sent!
Estimated response time: 1 to 5 minutes.
IQElectro is not an authorized distributor.
IQElectro LLC (IQElectro) is NOT an Authorized Distributor or in any way affiliated with Rockwell Automation, Siemens, or any other Manufacturers. IQElectro is NOT an Authorized Dealer of this product. The product may be of older version, date codes, or design than that available from authorized dealers. As IQElectro is not an authorized dealer of this product, the Original Manufacturer's Warranty and Support DO NOT apply. IQElectro sells SURPLUS only and DOES NOT SELL SOFTWARE or FIRMWARE licenses For more detailed information, please refer to the full version of our disclaimer policy Disclaimer Policy.
Description / Specifications

Description 

The Allen-Bradley 1785-BCM is a PLC-5 backup communication module designed to provide redundancy and fault tolerance in critical control systems. It supports one High-Speed Serial Link (HSSL) and two DH+/RIO communication interfaces. This module ensures continued communication and system availability in the event of a primary processor or communication failure.

 

 

Technical Specifications

Condition New/Never Used Surplus
Brand Allen-Bradley
Category PLCs / Machine Control
Part Number 1785-BCM
Subcategory Backup Communication Module
Module Type PLC-5 Backup Communications Module
Compatible Chassis 1771 I/O Chassis (Local)
Compatible Processors PLC-5/15 Series B, 5/20, 5/25, 5/30, 5/40, 5/60
High-Speed Serial Link (HSSL) 1 Port, 1.2 Mbaud
DH+/RIO Interfaces 2 Ports
Maximum Modules per System 4
Bus Communications Local PCI 2.3 Compliant
Customer Relay Rating 0.25 A @ 24 V DC (Resistive)
LED Indicators 1 Status/Diagnosis per Channel
Operating Temperature 0…60 °C
External Power Requirement None
Wiring Arm 1771-WG
Coating Conformal Coated
Dimensions (H×W×D) 115 × 317 × 160 mm
Weight 0.1 kg (0.3 lb)
Certifications UL, CSA Class I Div 2

 


Information About 1785-BCM

The 1785-BCM is part of the Allen-Bradley PLC-5 platform and is installed in a local 1771 I/O chassis to support redundant system architectures. It operates as a dedicated backup communications device, maintaining synchronization and readiness to assume communication duties if the primary path becomes unavailable. The module integrates directly with supported PLC-5 processors and uses high-speed serial and DH+/RIO networks to maintain system continuity. It is commonly used in mission-critical industrial applications where uptime, reliability, and controlled switchover are essential.

Key Features:

  • PLC-5 backup communication functionality: Provides redundancy for critical control systems.
  • High-Speed Serial Link interface: Supports HSSL communication up to 1.2 Mbaud.
  • Dual DH+/RIO interfaces: Enables redundant network connectivity.
  • Local chassis installation: Designed for use in 1771 I/O chassis systems.
  • Broad PLC-5 compatibility: Supports multiple PLC-5 processor models.
  • Industrial-grade reliability: Designed for continuous operation in harsh environments.
  • Diagnostic LED indicators: Provides status and channel-level diagnostics.
  • No external power required: Powered directly from the chassis backplane.
  • Conformal coated electronics: Enhances resistance to moisture and contaminants.

The 1785-BCM delivers the reliability and precision required for redundant communication and high-availability PLC-5 automation systems.

Check Out These Related Products