Some of the devices can be configured for redundancy. In a redundant setup two devices can control e.g. the same genset and breaker so if one fails, the other is ready to take over immediately. In Supervision the presence of redundant controllers will be indicated by the presence of two arcs above the Connect icon. One arc (the left) corresponds to the so-called A device whereas the B device, and the coloring of the arcs tells about the current status of the A and B controller.
The coloring of the arcs corresponds to the three cases
1. device is controlling at the moment (colored green per default)
2. device is redundant and ready to take over when needed (colored black per default)
3. device is redundant and not ready to take over (colored red per default)
The color or the arcs can be changed in the Color Scheme Editor.