Question about Sunricher Radio dimming actuator ZigBee 3.0 400 W RC Single Line

Yes, a standard push-button (push-button switch) can be connected to the COM and S1 connections. S1 is connected to the switch, COM serves as a reference point (earthing or common connection). The phase (L) is connected to the dimmer, the neutral conductor (N) is also connected to the dimmer, not to the switch. When actuated, the switch connects S1 to COM to control the device. A neutral conductor is not required on the switch, as the switch only functions as a push-button. The exact wiring is: phase (L) to the dimmer, neutral conductor (N) to the dimmer, switch between S1 and COM.