Allen-Bradley 1756-RM2/B ControlLogix Redundancy Module
$123.00
$320.00
Description
Allen-Bradley 1756-RM2/B ControlLogix Redundancy Module
The Allen-Bradley 1756-RM2/B, also cataloged as the 1756-RM2 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-RM2/B |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.64 lbs |
| Operating Temp | -25 deg C to 70 deg C |
| Power Consumption | 9 W |
| Module Type | ControlLogix Enhanced Redundancy Module |
| Controller Redundancy | Supports two identical controllers in redundant chassis configurations |
| Communication Speed | 1 Gbps fiber optic link |
| Communication Interface | 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 Deterministic Redundancy Communication
The 1756-RM2/B operates through the ControlLogix backplane architecture and provides dedicated redundancy synchronization through a 1 Gbps LC fiber optic communication link. The module exchanges controller status, synchronization information, and redundancy control data between paired chassis assemblies.
Firmware flash compatibility is required between redundant controllers, communication modules, and redundancy hardware before system activation. The module supports ControlLogix I/O density scaling by maintaining synchronized controller states across matched chassis configurations.
The redundancy communication path is isolated from standard application communication channels, allowing deterministic transfer of synchronization data. Hardware diagnostics are provided through module status indicators for local verification of redundancy operating conditions.
Frequently Asked Questions
Q: What fiber optic interface is used by the 1756-RM2/B module?
A: The 1756-RM2/B uses an LC fiber optic connector with a 1 Gbps redundancy communication link.
Q: What controller configuration is required for redundancy operation?
A: The module requires two identical controller chassis configurations with compatible firmware and supported ControlLogix components.
Q: What is the specified operating temperature range of the 1756-RM2/B?
A: The operating temperature range is -25 deg C to 70 deg C.
Field Installation Guidelines
Install the 1756-RM2/B module in a compatible ControlLogix chassis slot and confirm that both redundant chassis assemblies contain matching controllers, supported communication modules, and compatible firmware revisions.
Connect the LC fiber optic redundancy cable using approved routing practices. Keep optical cables separated from high-voltage wiring, motor circuits, and strong electromagnetic interference sources. Protect fiber connectors from contamination and mechanical stress.
Verify chassis grounding, power supply compatibility, and backplane power availability before enabling redundancy functions. Apply standard industrial cabinet 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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