Allen-Bradley 1756-RM/A ControlLogix Redundancy Module
$123.00
$320.00
Description
Allen-Bradley 1756-RM/A ControlLogix Redundancy Module
The Allen-Bradley 1756-RM/A, also cataloged as the 1756-RM Redundancy Module, operates as a dedicated hardware component for controller synchronization and failover execution within ControlLogix redundant chassis platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1756-RM/A |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.64 lbs |
| Operating Temp | 0 deg C to 60 deg C |
| Power Consumption | 9 W |
| Module Type | ControlLogix Redundancy Module |
| Controller Redundancy | Supports two identical controllers in redundant chassis configurations |
| Communication Speed | 100 Mbps with same-series redundancy modules |
| Communication Interface | Single-mode LC fiber optic connector |
| Redundancy Cable Compatibility | 1756-RMC1, 1756-RMC3, 1756-RMC10 |
| Current Draw | 4 mA at 1.2 VDC, 1.2 A at 5.1 VDC, 120 mA at 24 VDC |
| Thermal Dissipation | 31 BTU/hr |
| Storage Temperature | -40 deg C to 85 deg C |
| Relative Humidity | 5% to 95%, non-condensing |
| Shock Resistance | 30 g operating, 50 g non-operating |
| Vibration Resistance | 2 g at 10-500 Hz |
| Chassis Compatibility | 1756-A4, 1756-A7, 1756-A10, 1756-A13, 1756-A17 |
| Power Supply Compatibility | 1756-PA72, 1756-PA75, 1756-PB72, 1756-PB75, 1756-PA75R, 1756-PB75R, PSCA2 |
| Enclosure Type | Open-style module |
ControlLogix Backplane and Deterministic Redundancy Communication
The 1756-RM/A operates through the ControlLogix backplane architecture to exchange redundancy status and synchronization information between paired controller chassis. The module supports deterministic data transfer through a dedicated single-mode LC fiber optic link and maintains communication between matching controller assemblies.
The module requires identical controller configurations and compatible firmware conditions for redundancy operation. ControlLogix firmware flash compatibility must be verified before deployment to ensure matched controller and redundancy module operation.
The redundancy architecture supports I/O density scaling by allowing multiple ControlLogix system configurations while maintaining synchronized controller states. Proper chassis matching and backplane communication configuration are required for system-level failover execution.
Frequently Asked Questions
Q: What type of communication connection is used between redundant chassis?
A: The 1756-RM/A uses a single-mode LC fiber optic connection for redundancy communication between paired ControlLogix chassis.
Q: Can the 1756-RM/A operate with non-identical controller chassis configurations?
A: No. Redundancy operation requires matching controller hardware configurations, compatible firmware revisions, and supported chassis combinations.
Q: What is the maximum power dissipation of the module?
A: The 1756-RM/A has a specified power dissipation of 9 W with thermal dissipation of 31 BTU/hr.
Field Installation Guidelines
Install the 1756-RM/A module in a compatible ControlLogix chassis slot and verify that both redundant chassis assemblies contain matching controller modules, communication modules, and firmware revisions.
Connect the fiber optic redundancy cable using the specified LC interface and route fiber cables separately from high-voltage conductors and electromagnetic noise sources. Avoid mechanical stress, sharp bends, and contamination of optical connectors during installation.
Confirm chassis grounding, power supply compatibility, and backplane power availability before enabling redundancy functions. Follow standard industrial cabinet wiring practices for cable segregation and shield termination.
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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