What the existing connection tells
An electric switch plate, magnet lock or door control responds differently to a contact. The relay only gives a switching signal; it does not prove that the connected door hardware is suitable or correctly powered.
advice
Connecting the door opener relay to an intercom
The button in an indoor post is only usable when the relay, the door opener and the power supply have been rated as a single chain.
The technical choice
First determine which type of lock is present, whether it opens without power or actually locks, and how long the contact must switch. Also look at emergency unlocking and existing access control.
What you let me arrange
Connect the relay according to the information on the intercom and door hardware. In case of shared access or a gate, a separate access controller can be more logical than switching directly from the outside post.
Delivery to the door
Test opening from any indoor post and app, but also the mechanical outlet and behavior during power outages. Note which switch duration is set and who may change it later.
Frequently asked questions
Does a relay open the door itself?
No. The relay switches a contact; the lock, power supply and safety must work separately.
Can the same door with tag and intercom open?
Often yes, provided the access solution is designed as a whole.