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Description:1785-BEM — PLC-5 communications expansion module enabling redundant DH+ and Remote I/O channel switching and system-level backup support for high-reliability industrial control architectures.
Product condition: New
Packing condition:Factory Packing
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| Manufacturer | Allen-Bradley |
| Item number | 1785-BEM |
| Country of Origin | United States |
| Lead Time | In stock |
| After-Sales Support | 12-months |
| HS Code / Commodity code | 8537101190 |
Quotes are valid for 30 days from the day the quote is received unless stated otherwise at the time of quotation.
Yes,we offer one year warranty for all new products.
Yes. We worked with FEDEX/DHL/TNT/UPS/ allowing us to provide swift global delivery of parts to any corner of the world.
Normally 3-5 working days,some remote areas 5-7 days more.
v Mark VI Series:1785-BEM
The 1785-BEM is the Backup Expansion Communication Module in the Allen-Bradley PLC-5 series, used to implement dual-machine redundancy and communication channel backup switching in PLC-5 control systems. This module is typically used in conjunction with the 1785-BCM (Backup Communication Module) to achieve high-speed data synchronization and automatic switching between primary and backup PLC-5 controllers.
This module supports Data Highway Plus (DH+) and Remote I/O channel backup switching to improve the availability and fault tolerance of critical control systems, and is widely used in high-reliability industrial scenarios.
v 1785-BEM Specification
Product Model: 1785-BEM
Product Series: Allen-Bradley PLC-5
Module Type: Backup Communications Expansion Module
Matching Module: 1785-BCM Series B
Communication Functions: DH+ / Remote I/O channel backup switching
Communication Interface: 1771 rack backplane interface
Backup Mechanism: Master/backup PLC-5 controller communication synchronization
I/O Support: Supports data synchronization with remote I/O
Switch Configuration: DIP Switch - Sets communication channel mode
Installation Method: 1771 PLC-5 I/O rack slot
v The 1785-BEM offers numerous advantages:
Redundant Communication Architecture Support
Enables communication backup and automatic switching between dual PLC-5 systems, improving system availability.
Enhanced System Reliability
Automatically switches to a backup path in case of main controller or communication link failure, ensuring production continuity.
Supports Critical Industrial Networks
Compatible with DH+ and Remote I/O channels, suitable for traditional PLC-5 industrial network architectures.
Works in conjunction with 1785-BCM
Enhances BCM system capabilities as an extension module, enabling a more complete redundant control solution.
Industrial-Grade Stable Design
Suitable for high-reliability continuous operation systems, such as energy and heavy industry applications.
v Why choose the 1785-BEM ?
Power and Energy Systems: Used for redundant communication and critical equipment protection in power plant control systems.
Petrochemical Industry: Used for dual-machine hot standby and communication redundancy architectures in process control systems.
Manufacturing Automation: Used for critical control systems on production lines to improve system continuous operation capability.
Water Treatment Systems: Used for redundant control architectures in pumping stations and water supply systems.
Metallurgy and Mining: Used for high-reliability communication assurance in heavy-duty equipment control systems.
Infrastructure Systems: Used for redundant control networks in transportation, energy, and large industrial systems.
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