The Allen-Bradley 1756-RM/A is a ControlLogix Redundancy Module designed to provide high-availability operation for industrial automation systems. This module facilitates seamless switchover between primary and secondary controllers, ensuring continuous process control and minimizing downtime in critical applications. It is engineered for integration within the ControlLogix platform, supporting specific controller configurations to maintain system synchronization.
Features
Supports redundancy for two 1756-L61, 1756-L62, or 1756-L63 controllers.
Supports redundancy for one 1756-L64 controller.
Accommodates up to seven communication modules within the redundant chassis configuration.
Provides reliable state and data synchronization between redundant controller pairs.
Compact module design for standard ControlLogix chassis mounting.
Technical Specifications
Model
1756-RM/A
Power Dissipation
9 Watts
Thermal Dissipation
31 BTU/hr
Current Draw (1.2V DC)
4 mA
Operating Temperature
0 to 60 degC (32 to 140 degF)
Storage Temperature
-40 to 85 degC (-40 to 185 degF)
Installation Guidelines
Ensure the ControlLogix chassis is powered down before inserting or removing the 1756-RM/A module to prevent electrical damage.
Verify that the module is fully seated in the chassis slot and that the locking tabs are engaged.
Follow standard ESD (Electrostatic Discharge) precautions when handling the module to protect internal components.
Ensure adequate ventilation in the cabinet to maintain operating temperatures within the specified 0 to 60 degC range.
Confirm that firmware versions across both redundant controllers and the redundancy module are compatible according to the latest Rockwell Automation documentation.
FAQ
What is the primary function of the 1756-RM/A?
The 1756-RM/A acts as a bridge between two ControlLogix controllers, allowing them to operate in a redundant pair. If the primary controller fails, the secondary controller assumes control of the process without significant interruption.
Can this module be used with any ControlLogix controller?
No, the 1756-RM/A is specifically designed for use with the 1756-L6x series controllers. Please verify your specific controller model against the supported list (L61, L62, L63, or L64) before installation.
