Auxiliary switch can be converted to fault signal switch. Auxiliary switch: reports the switching state for manual and fault triggering. Fault signal switch: reports the switching state for fault triggering, no message for manual triggering. Test button for checking the signaling devices connected to the signal switch, for LS switches, FI/FILS circuit breakers of the Legrand TX3 and DX3 series. Tool-free installation by simply clipping onto the left side of the main device, maximum of 3 auxiliary devices or 2 auxiliary devices + 1 control device per main device. 1 changeover contact, 6 A 240 V AC, device width 0.5 pitch units
