AllenBradley 1756-RM-A Enhanced Logic Redundancy Control Module

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Brand model: AB
Product Name: 1756-RM-A
Warranty: 1 year
Size: 175 mm (6.89 in) height × 140 mm (5.51 in) width × 118 mm (4.65 in) depth
Weight: 1.5kg
Status: New/Used

Categories: A-B

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Description
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Description

Allen Bradley 1756-RM-A Enhanced Logic Redundancy Control Module

1756-RM-A

Label	Specification
Model Number	1756-RM-A
Brand	Allen-Bradley (Rockwell Automation)
Type	ControlLogix Redundancy Module
Redundancy Configuration	1:1 controller redundancy
Communication Method	100 Mbps fiber optic (LC connector) + Ethernet/IP
Operating Temperature	0°C to 60°C (32°F to 140°F)
Storage Temperature	-40°C to 85°C (-40°F to 185°F)
Power Requirements	0.8A @ 5V DC (backplane); 0.1A @ 5V DC (module); 120mA @ 24V DC
Mounting	Single-slot in ControlLogix chassis (1756-A4/A7/A10/A13/A17 compatible)
Weight	1.5 kg (3.3 lb)
Certifications	CE, CSA, Ex, C-Tick, c-UL-us
Dimensions	175 mm (6.89 in) height × 140 mm (5.51 in) width × 118 mm (4.65 in) depth
Humidity Resistance	5% to 95% non-condensing
Vibration Resistance	1 g, 5-500 Hz
Shock Resistance	30 g for 11 ms
Key Feature	Hot-swappable design with automatic failover capability

The Allen-Bradley 1756-RM-A has been engineered with features that address the most critical challenges in maintaining system availability. Its high-speed fiber optic communication link enables synchronized operation between redundant controllers, ensuring that both primary and backup units maintain identical process data and program states. This synchronization happens in real-time at 100 Mbps, minimizing the potential for data loss during failover events and ensuring that process transitions remain smooth and accurate.

Compatible and Related Models

1756-L75 – A high-performance ControlLogix controller commonly paired with the Allen-Bradley 1756-RM-A in redundant configurations.
1756-A10 – A 10-slot ControlLogix chassis that provides the physical platform for housing the Allen-Bradley 1756-RM-A and associated controllers.
1756-PA75R – A redundant power supply that complements the Allen-Bradley 1756-RM-A by ensuring uninterrupted power to the control system.
1756-RM-CX – The 专用 redundancy cable required for synchronizing controller pairs using the Allen-Bradley 1756-RM-A.
1756-ENBT – An Ethernet/IP communication module that enables network connectivity for systems utilizing the Allen-Bradley 1756-RM-A.
1756-RM-B – The Series B enhancement of the redundancy module, offering improved diagnostics over the Allen-Bradley 1756-RM-A.
1756-PSCA2 – A compact power supply adapter compatible with redundancy setups featuring the Allen-Bradley 1756-RM-A.
1756-HSC – A high-speed counter module that integrates with redundant systems using the Allen-Bradley 1756-RM-A for precision counting applications.