Allen-Bradley 1785-BCM/C Backup Communication Module
$123.00
$320.00
Description
Allen-Bradley 1785-BCM/C Backup Communication Module
The Allen-Bradley 1785-BCM/C, also cataloged as the 1785-BCM/C Backup Communication Module, operates as a dedicated hardware component for redundant PLC-5 processor coordination within 1771 I/O chassis control platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1785-BCM/C |
| Brand | Allen-Bradley |
| Origin | United States |
| Weight | 0.6 kg |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | 5 VDC backplane current draw: 1.0 A |
| Product Type | Backup Communication Modules |
| Compatible Processors | PLC-5/15 Series B, PLC-5/20, PLC-5/25, PLC-5/30, PLC-5/40, PLC-5/60 |
| Installation Location | 1771 I/O chassis local installation |
| Communication Interface | High-Speed Serial Link (HSSL) |
| Communication Speed | 1.2 Megabaud |
| Customer Relay Output | 0.25 A at 24 VDC resistive load |
| Keying Positions | Between 8-10 |
| Wiring Arm Compatibility | 1771-WG |
| Storage Temperature | -40 to 85 deg C |
| Relative Humidity | 5-95% non-condensing |
| Certifications | UL Listed, CSA Class 1 Division 2 |
| Diagnostics | Status indicators and system status word bits |
Industrial Control Network Interface Characteristics
The 1785-BCM/C provides PLC-5 redundancy communication through a dedicated High-Speed Serial Link (HSSL) interface. The module exchanges synchronization data between primary and backup PLC-5 processors to support automatic controller transfer functions.
The module operates through the 1771 chassis backplane interface and maintains processor status monitoring through hardware diagnostics. The design supports bumpless switchover behavior by transferring control coordination between paired PLC-5 processors without requiring additional I/O capacity or processor execution resources.
The 1785-BCM/C integrates with PLC-5 automation architectures using defined backplane communication paths and controller health monitoring. The module supports fault detection through status indicators and system status word information.
Firmware and PLC-5 Redundancy Interface Characteristics
The 1785-BCM/C is configured for PLC-5 Series redundant control systems and uses HSSL communication at 1.2 Megabaud for processor-to-processor data exchange. Firmware compatibility must match the installed PLC-5 processor configuration and redundancy system requirements.
The module provides communication coordination only and does not increase controller memory, processor performance, or local I/O capacity. Correct chassis keying and wiring arm installation are required for proper hardware integration.
Frequently Asked Questions
Q: What PLC-5 processors are compatible with the 1785-BCM/C?
A: The module supports PLC-5/15 Series B, PLC-5/20, PLC-5/25, PLC-5/30, PLC-5/40, and PLC-5/60 processors.
Q: What is the backplane current requirement of the 1785-BCM/C?
A: The module requires 1.0 A from the 5 VDC 1771 chassis backplane supply.
Q: Does the 1785-BCM/C add PLC processing or I/O functions?
A: No. The module provides backup communication and redundancy management functions only.
Field Installation Guidelines
Install the 1785-BCM/C in an appropriate 1771 I/O chassis slot using the specified keying position and compatible 1771-WG wiring arm. Confirm chassis power availability before module installation.
Connect redundancy communication wiring according to the PLC-5 backup configuration. Separate communication wiring from high-voltage conductors, motor cables, and switching equipment to reduce electrical interference.
Verify front-panel status indicators and PLC-5 system status information after startup. Maintain installation conditions within the specified operating temperature and humidity limits. Ensure processor firmware and redundancy configuration compatibility before placing the system into operation.
Features
Minimum Order Quantity (MOQ)
We welcome bulk orders and have a minimum order quantity of just one unit.
Certificates and Documentation
Upon request, we can provide all necessary documentation, including Certificates of Origin/Conformance and other required export documents.
Delivery Time
For items in stock, we aim to deliver within 1-3 days after payment confirmation. Items with specified lead times will be delivered according to the quoted schedule.
Payment Methods
We accept 100% T/T (Telegraphic Transfer) payment before shipping. For items with lead times, a 30% deposit is required upfront, with the remaining 70% due before shipment. For RMB transfers, please contact us if you have an agent in China.
Warranty
We offer a standard one-year warranty on all new and original items. If you require an extended warranty, please contact us for additional cost details.
Refund and Return Policy
Your satisfaction is important to us. If you need to return an item, it must be done within 30 days of the order date. The product must be unused, unopened, and in its original packaging with all accessories included. Refunds are processed within 5-7 business days after we receive the returned item. Please note that shipping and related charges are non-refundable.
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