General Rules:

• Going to a later minor revision and/or kit is acceptable.

• Going to the next major revision is acceptable.

• Going through more than one major revision requires you to perform the RSU process multiple times.

  

*Depending on the modules used in the local rack, you may not be able to update the system with RSU. See Knowledgebase Technote ControlLogix®: Redundancy Firmware Bundle Revision History to see which modules are at an older firmware in the newer redundancy bundle.