Shelly i4 Gen3 wiring diagram

Every job, terminal by terminal

1. Wire a second switch

   Power on L and N, the switch on SW1

   Mains comes in on L and N to power the i4. The switch takes active on one side and lands on SW1 on the other, so the i4 sees each flip. Nothing is switched through the i4: it sends the light its command over Wi-Fi.

   Terminals for wire a second switch on the Shelly i4 Gen3

   Terminal	What it does here
   L	230 V active in
   N	Neutral in
   SW1	The second switch
   SW2	Spare input
   SW3	Spare input
   SW4	Spare input

   SW2, SW3 and SW4 take up to three more switches or buttons. The second L is joined to the first inside the i4.

   Supply: 230 V~ 50 Hz

2. Wire a push button

   Power on L and N, the button on SW1

   Mains comes in on L and N to power the i4. The push button takes active on one side and lands on SW1 on the other, so the i4 sees each press. Nothing is switched through the i4: it sends the lights their commands over Wi-Fi.

   Terminals for wire a push button on the Shelly i4 Gen3

   Terminal	What it does here
   L	230 V active in
   N	Neutral in
   SW1	The push button
   SW2	Spare input
   SW3	Spare input
   SW4	Spare input

   SW2, SW3 and SW4 take up to three more switches or buttons. The second L is joined to the first inside the i4.

   Supply: 230 V~ 50 Hz