Allen-Bradley 1756-RM2/A ControlLogix Redundancy Module
$123.00
$320.00
Description
Allen-Bradley 1756-RM2/A ControlLogix Redundancy Module
The Allen-Bradley 1756-RM2/A serves as the primary 1756-RM Redundancy Module utilized to execute controller synchronization and failover control across ControlLogix redundant chassis platforms.
Suffix Breakdown & Model Matrix
| Model Identifier | Description |
|---|---|
| 1756-RM2 | ControlLogix Enhanced Redundancy Module |
| /A | Hardware revision identifier |
| 1756-RM2/A | Complete catalog configuration for the enhanced redundancy module |
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1756-RM2/A |
| 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 High-Speed Redundancy Communication
The 1756-RM2/A operates through the ControlLogix backplane architecture and uses a 1 Gbps LC fiber optic communication link for controller synchronization and redundancy status exchange. The module maintains synchronized controller states between paired chassis assemblies and provides local diagnostic indication through integrated module status monitoring.
The enhanced redundancy design supports firmware flash compatibility checks and higher-speed synchronization compared with earlier 1756-RM series modules. Matching controller firmware, chassis configuration, and compatible communication modules are required for deterministic redundancy operation.
The module supports I/O density scaling within ControlLogix architectures by maintaining synchronized operation across redundant controller platforms. The redundancy link is isolated from standard controller communication networks to provide dedicated synchronization data transfer.
Frequently Asked Questions
Q: What communication interface is used by the 1756-RM2/A redundancy link?
A: The 1756-RM2/A uses an LC fiber optic interface with 1 Gbps communication speed for redundant chassis synchronization.
Q: Is the 1756-RM2/A compatible with earlier 1756-RM configurations?
A: The 1756-RM2/A requires compatible redundancy firmware and matching ControlLogix components. System compatibility must be verified before installation.
Q: What environmental temperature range is specified for the 1756-RM2/A?
A: The operating temperature range is -25 deg C to 70 deg C, with storage temperature from -40 deg C to 85 deg C.
Field Installation Guidelines
Install the 1756-RM2/A module in an approved ControlLogix chassis slot and verify that redundant chassis assemblies contain matching controller hardware and compatible firmware revisions.
Connect the LC fiber optic redundancy cable according to the installation requirements. Route fiber cables separately from high-voltage conductors, motor wiring, and sources of electromagnetic interference. Protect optical 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 segregation, 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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