1756-RM AB Allen-Bradley PLC ControlLogix redundancy module 1756 Series Original brand new

1756-RM AB PLC ControlLogix redundancy module 1756 Series Original brand new

Redundancy Modules
ControlLogix redundancy modules are required for a redundant system. Standard and extreme environment modules are available.
ControlLogix firmware version 20.054 supports enhanced redundancy features for high-availability applications. Download the enhanced redundancy firmware bundle (20.054_kit1)
The following features have been added with the revision 20.054_kit1 release:

Addition of the 1756-RM2 and 1756-RM2XT enhanced redundancy modules.Redundancy module speeds of up to 1000 Mbps when using a 1756-RM2 or RM2XT module with another 1756-RM2/RM2XT module. Your system experiences the best scan performance if you use a 1756-RM2 or RM2XT redundancy module with 1756-L7x controllers in both chassis.The 1756-RM2/RM2XT modules are interference-free with regard to safety functions and can be used in ControlLogix® SIL2 applications.Redundant fiber ports for the 1756-RM2/RMXT modules for crossloading; no single point of failure of a fiber cable.During a switchover of the fiber channels on the 1756-RM2/RM2XT modules, scan time can encounter a delay of ~10 ms or less; however, the chassis remains synched at all times during the channel switchover process.

ControlLogix Redundancy Module 

Cat. No.	Description	Controllers Supported	ControlNet Communication Modules Supported	EtherNet/IP Communication Modules Supported
1756-RM	ControlLogix redundancy module	One or two 1756-L6 or 1756-L7 controllers in each chassis	Up to seven enhanced ControlNet communication modules: 1756-CN2/B, 1756-CN2R/B, 1756-CN2RXT	Up to seven enhanced EtherNet/IP communication modules: 1756-EN2T, 1756-EN2TR, 1756-EN2TXT
1756-RMXT	ControlLogix redundancy module rated for extreme environment
1756-RM2	Enhanced ControlLogix redundancy module
1756-RM2XT	Enhanced ControlLogix redundancy module rated for extreme environment
Features Not Supported • Any motion feature • Any SIL3 functional safety feature within the redundancy controllers • Firmware Supervisor • Event Tasks • Firmware revision 19.052 for 1756-L7x controller