How do you connect the control unit to the device being unlocked (lock, gate motor)?

Connecting the gate to the control unit’s relay terminal: dry N/O contact, up to 10A/250V.

The gate or electronic device to be triggered connects to the control unit’s relay terminal (dry N/O contact, up to 10A/250V): depending on the model, 2, 4, or 8 relays are available, each able to manage one gate. For the complete wiring diagram, see Electrical Wiring.