The auxiliary and signal contacts are mounted on the protective devices, typically on the left side, and optionally on the right side for the circuit breaker. For auxiliary and signal contacts supplied via SMISSLINE auxiliary busbars LA or LB, there is a version with integrated contact connection. Conventional connection via terminals is also possible. The auxiliary contact operates in parallel with the main contacts. The signal contact only operates during electrical triggering, which can be simulated using the test button. After each triggering, the signal contact must be reset to its original position using the orange reset button. The delivery of the auxiliary and signal contacts with 1S and 1Ö, as well as the connection terminal, includes a contact piece for direct connection on a SMISSLINE TP base. The signal contact for collective alarm, as well as auxiliary and signal contacts with 2S and 2Ö, come with two contact pieces. The signal contact for collective alarm with connection via auxiliary busbars LA and LB enables a cost-effective collective alarm solution without additional wiring.