Using the Frame Control Panel > Using the Frame — Controller Settings > Configuring Redundancy

Configuring Redundancy

If you have both a primary controller module and a secondary controller module, the secondary controller module automatically serves as backup to the primary module. You do not need to configure anything for this to be so.

Your SEL-MCP3 frame supports application module redundancy, where a module of a particular type can be designated to protect one or more modules of the same type within the same frame. When configured, if a primary module fails, the controller module automatically reconfigures the backup module to take over.

Some modules that are designated to be a similar type can serve as backup for each other. For example:

• SEL-ENC1 and SEL-ENC2 in distribution mode
• SEL-DEC1 and SEL-DEC2
• SEL-MDX1 and SEL-MDX2

If a module is not sufficiently similar in type or configuration to back up another module, then the action will not be allowed during the configuration process. For example, an ENC2 configured in contribution mode cannot back up an ENC1.

When a module with an expansion module (for example, a SEL-XD1 with AAEX audio expansion module) fails, both modules go offline. If the module configured to serve as backup for the main module also has an expansion module, both the main module and the expansion module will fail over or back at the same time. This happens automatically and does not require configuration.