Redundant Group Control Application Note

This application note defines the architecture and operation of Redundant Group Control (RGC), which coordinates two to four systems (each comprising up to three modules) to provide redundancy, load sharing, and failover for computer room air conditioners. It explains the roles of main and expansion modules, system and group statuses (Online, Idle, Share, Failed, Offline), and the user-configurable events that trigger a backup system to take over upon a primary system failure.