Shelly Pro 2PM wiring diagram

Every job, terminal by terminal

1. Meter an appliance

   One measured circuit on channel 1, with a second channel spare

   The relay sits on a DIN rail in the switchboard. L and N power the unit, the active also feeds relay 1 on I1, and O1 carries it out to the appliance while the relay reports its live power draw and energy use in the app. Channel 2, on I2 and O2, can meter a second appliance the same way. Up to 16 A a channel and 25 A in total; a pump or other motor needs an RC snubber across the load.

   Terminals for meter an appliance on the Shelly Pro 2PM

   Terminal	What it does here
   O1	The metered appliance, up to 16 A (a motor needs an RC snubber)
   I1	Active in to relay 1
   L	230 V active in, powering the unit
   N	Neutral in
   SW1	Switch or button input for channel 1
   O2	Channel 2 output, for a second appliance
   I2	Channel 2 relay input
   SW2	Switch or button input for channel 2

   Supply: 230 V~ 50 Hz

2. Drive a roller shutter or awning

   Cover mode from the switchboard — one motor, two directions

   The relay sits on a DIN rail in the switchboard. In cover mode it drives the motor one way at a time: the active feeds both relays on I1 and I2, O1 and O2 each feed one winding, and the motor's common returns to neutral. Shelly's diagram adds an RC snubber across each winding, which is one for your electrician. If the motor runs the wrong way, turn on Reverse directions before calibrating. SW1 and SW2 take optional open and close buttons. Use a motor with its limit switches set before connecting it.

   Terminals for drive a roller shutter or awning on the Shelly Pro 2PM

   Terminal	What it does here
   O1	One motor winding
   O2	The other motor winding
   I1	Active in to relay 1
   I2	Active in to relay 2
   N	Neutral in, also the motor's common return
   L	230 V active in, powering the unit
   SW1	Optional open button
   SW2	Optional close button

   Supply: 230 V~ 50 Hz