Allen-Bradley 1756-RM2 - Features of the Controllogix Enhanced Redundancy System

16 Rockwell Automation Publication 1756-UM535D-EN-P - November 2012
Chapter 1 About Enhanced Redundancy Systems
Features of the ControlLogix
Enhanced Redundancy
System
The software and hardware components required to configure and use a
ControlLogix enhanced redundancy system provide these features:
• Redundancy module speeds of up to 1000 Mbps when using a 1756-
RM2/A module with another 1756-RM2/A module. Redundancy
module speeds up to 100 Mbps when using a 1756-RM/A with another
1756-RM/A module, and a 1756-RM/B module with another 1756-RM/
B module.
• Redundant fiber ports for crossloading; no single point of failure of a fiber
cable.
• Plug-and-play-style commissioning and configuration that does not
require extensive programming.
• ControlNet and EtherNet/IP network options for the redundant
chassis pair.
• Easy-to-use, fiber-optic communication cable that connects redundant
chassis pairs. Use the same cable for the 1756-RM2/A or 1756-RM/B
modules.
• Simple redundant controller configuration by using a checkbox in the
Controller Properties dialog box in RSLogix 5000 software.
• A redundancy system ready to accept commands and monitor the
redundant system states after basic installation, connection, and powerup.
• Switchovers occur as fast as 20 ms.
• Support for these FactoryTalk® applications for EtherNet communication
modules:
– FactoryTalk Alarms and Events
– FactoryTalk Batch
– FactoryTalk PhaseManager™
• Support for CIP Sync technology over an EtherNet/IP network to
establish time coordination across the enhanced redundant system.
• Access to remote I/O modules over an EtherNet/IP network.
• Access to 1715 Redundant I/O systems over an EtherNet/IP network.
• 1756-EN2T socket support.