Swap medium for enabling Layer 3 routing functions
For the automatic backup of configuration data. If a fault occurs, it allows fast and simple device replacement without a field PG (contains the function of the C-PLUG)
KEY-PLUG X-500; can be used in all Layer 2 versions of SCALANCE XR-500 switches
KEY-PLUG XM-400 ; can be used in all Layer 2 versions of SCALANCE XM-400 basic devices