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Redundancy Modules
Redundancy ModulesControlLogix redundancy modules are required for a redundant system. Standard and extreme environment modules are available.
ControlLogix firmware version 19.50 supports enhanced redundancy features for high-availability applications. Download the enhanced redundancy firmware bundle (V19.52Enh) from the Rockwell Automation Support site.
Redundant Controller System Requirements
| Redundant System Requirements | |
| Two 1756 chassis | Each chassis must have the same: – number of slots – modules in the same slots – redundancy firmware revisions in each module |
| Additional ControlNet nodes, if the application uses ControlNet networks | Two additional ControlNet nodes outside the redundant chassis pair |
| Redundancy module in each chassis | 1756-RM or 1756-RMXT redundancy module in each chassis, connected by a 1756-RMCx cable |
| ControlLogix controllers | One or two 1756-L6 or 1756-L7 controllers in each chassis |
| Software for enhanced redundancy systems | Required: – Redundancy Module Configuration Tool 7.2.7 – RSLinx Classic 2.57 (CPR 9, SR3) – RSLogix 5000 19.01 (CPR 9, SR 3) Optional – FactoryTalk Services Platform 2.10.02 (CPR 9, SR3)(1) – FactoryTalk Alarms and Events 2.20.00 (CPR 9, SR2) – FactoryTalk Batch 11.00.00(2) – FactoryTalk View Site Edition 5.10.00 (CPR 9, SR2) – RSLinx Enterprise 5.21 (CPR 9, SR2) |
ControlLogix Redundancy Modules
Specifications [PDF]
| 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 | |||
| Enhanced redundancy firmware v19.50 does not support the following: 1757-SRM redundancy module 1756-CNB(R) series D or E ControlNet communication modules 1756-ENBT, 1756-EWEB, and 1756-EN2F EtherNet/IP communication modules |
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Connector Cables
| Cat. No. | Description | Length |
| 1756-RMC1 | Cable, 1756-RM redundancy module | 1 m (3.28 ft) |
| 1756-RMC3 | 3 m (9.84 ft) | |
| 1756-RMC10 | 10 m (32.81 ft) |