Allen-Bradley 1756-RM/B ControlLogix Redundancy Module
$123.00
$320.00
Description
Allen-Bradley 1756-RM/B ControlLogix Redundancy Module
Configured for controller synchronization and failover execution in ControlLogix redundant chassis systems, the Allen-Bradley 1756-RM/B (1756-RM Redundancy Module) provides direct physical and data communication execution between paired controller assemblies through a fiber optic redundancy link.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1756-RM/B |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.5 kg |
| Dimensions | 3.8 cm x 15.2 cm x 15.2 cm |
| 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 modules |
| Communication Interface | Single-mode LC fiber optic connector |
| Redundancy Cable Compatibility | 1756-RMC1 (1 m), 1756-RMC3 (3 m), 1756-RMC10 (10 m) |
| Current Draw | 4 mA at 1.2 VDC, 1.2 A at 5.1 VDC, 120 mA at 24 VDC |
| Power Dissipation | 9 W |
| 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 Communication and Firmware Compatibility
The 1756-RM/B operates within the ControlLogix backplane architecture to exchange synchronization data, redundancy status, and controller state information between paired chassis assemblies. The module uses a single-mode LC fiber optic connection for dedicated redundancy communication and supports deterministic controller synchronization.
The module supports firmware flash compatibility verification within ControlLogix systems to maintain matched controller configurations. Proper firmware alignment between redundancy modules, controllers, and associated communication modules is required before enabling redundant operation.
The ControlLogix architecture allows I/O density scaling through multiple chassis configurations while maintaining synchronized controller operation. PRI, COM, and OK LED indicators provide local hardware status information for redundancy monitoring and module diagnostics.
Frequently Asked Questions
Q: What physical connection is used for redundancy synchronization on the 1756-RM/B?
A: The 1756-RM/B uses a single-mode LC fiber optic connector with compatible 1756-RMC series redundancy cables.
Q: What chassis types are compatible with the 1756-RM/B module?
A: The module supports 1756-A4, 1756-A7, 1756-A10, 1756-A13, and 1756-A17 ControlLogix chassis configurations.
Q: What backplane power load is required by the module?
A: The module requires chassis backplane power with current draw values of 4 mA at 1.2 VDC, 1.2 A at 5.1 VDC, and 120 mA at 24 VDC.
Field Installation Guidelines
Install the 1756-RM/B module in a compatible ControlLogix chassis slot and verify that both redundant chassis assemblies contain matching controller hardware, supported communication modules, and compatible firmware revisions.
Connect the fiber optic redundancy cable to the LC interface and route optical cables away from high-voltage conductors, motor power wiring, and high electromagnetic interference sources. Protect the connector ends from contamination and mechanical damage during installation.
Verify chassis grounding, power supply compatibility, and backplane power availability before system startup. Use standard industrial cabinet wiring practices for cable separation, shielding, and enclosure grounding.
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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