Switching actuator for switching consumers, KNX series installation device with a width of 4 TE (SA4 - 230 / 16 /) or 8 TE (SA8 - 230 / 16 /) for mounting on a top hat rail (TH 35 according to EN 60715) for installation in the distributor, The device has 4 (SA4 - 230 / 16 /) or 8 (SA8 - 230 / 16 /) independent, potential-free normally open contacts., Switching contacts are optimized for capacitive loads, Hand switches enable manual switching even without bus voltage, The switching actuator is supplied by the KNX bus and does not require an additional power supply, The outputs are connected via screw terminals