How to connect an electric lock to the Aqara T2 in dry contact mode?

Hi everyone,

I’m a little new in the relays topic. I have an electric lock that requires an external power supply, and I want to control it using the Aqara T2 relay in dry contact mode.

The Aqara T2 has the following terminals:

L, N, L1, L2, Lin, Lout

S1, S2, COM

My electric lock has two wires and needs its own external 12v power supply. I understand that in dry contact mode, the relay should work as a simple switch without supplying power.

My Questions:

  1. Which terminals on the T2 should I use to properly switch the lock circuit?

  2. How should I wire the external power supply to the lock while ensuring the relay can control it?

  3. To be able to integrate my existing videodoorbell (with a push button), how should I wire it in the relay?

Any wiring diagrams or detailed explanations would be greatly appreciated. Thanks in advance!

  1. Lout and L1
  2. what kind of power supply?
  3. might be difficult and needs examination of the circuit and testing