Ownership

One controller owns each safety I/O device in a non-redundant safety system. Multiple controllers and multiple safety I/O devices can be used without restrictions in chassis or on networks. When a controller owns an I/O device, it stores the configuration data that you define for that device. This configuration controls how the devices operate in the system.

From a control standpoint, one controller controls safety output devices. One controller also owns each safety input device. However, safety input data can be shared (consumed) by multiple controllers.