ᐅ Connecting a Magnetic Lock to an Intercom System?

Hello dear forum,

a brief background:

Our electrician installed two cables outside during our construction. One was intended to power the motor for our cantilever sliding gate, and the other was for the doorbell. When we built the fence ourselves, we embedded the doorbell cable in the masonry and left it exposed at the desired doorbell location.

The electrician then connected the doorbell—it definitely involved many thin cables in different colors. Inside, we have an intercom system with a handset (no camera or similar features).

Now the time for "later" has come, and we are having the sliding gate including a side pedestrian gate made (from Poland). Today was the day for measuring. By default, a pedestrian gate with a magnetic lock will be installed, which can be opened from the inside via the intercom system.

Since I am a complete "layman" on this topic...

My questions are:

1. Where does the lock get its power from? Should we have separated this cable when embedding it in the masonry? Or is it now tapped off from the doorbell?

2. How is the lock installed? Are the bricks or masonry chased/slotted for this?

3. How exactly does it work?

If the door is not "locked," can you still only enter using the release button?

If the door is "locked," do I still have to exit by unlocking it?

I wasn’t present during the measuring because I was at work—only my wife was there. I want to educate myself a bit before making any final decisions.

Edit: The doorbell and intercom system are from the company "Urmet"...

Here is a sketch:

I assume you don’t mean a lock, but a latch (like the one on a front door opened by a doorbell buzzer). It is activated by the doorbell transformer current, and the wiring runs hidden within the frame.

With a gate, usually only the latch is engaged, not a bolt that locks it shut.

The motor for the sliding gate obviously requires power—don’t ask me whether it’s low voltage or mains power—but it also needs a control signal, probably transmitted via a type of “telephone cable” (the number of conductors depends on its control module).

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11ant schrieb:
I assume you don’t mean a lock, but rather a latch (like an electric strike that opens a front door with a buzzer). It’s activated by the chime transformer current, and the wiring disappears inside the frame.

For a gate, usually only the latch is engaged and not a bolt thrown.

The sliding gate motor naturally needs power—don’t ask me if it’s lighting current or mains supply—and also control signals, probably via a multi-core "telephone cable" (how many cores depends on the control module).

Exactly, I mean the buzzer that opens the gate from the inside.

The sliding gate is opened only by remote control (motor: Sommer Runner), the same as our garage door (motor: Sommer Duo Vision), so we only need one remote for both. The cable is already in the correct place. The gate will be installed by the company.

Only the gate needs a buzzer now, which should be operated from inside via the intercom. This buzzer will be mounted on the pillar next to the gate—which makes sense.

But being activated by the chime transformer, what exactly does that mean?

I only installed one 8-core cable for the doorbell going outside. This cable is completely connected to the doorbell and embedded inside the pillar. Would a second cable have been necessary for the buzzer?

Or does it get power and the activation signal through the same doorbell cable?

I ask because:

Option 1: If I don’t have a second cable, I can’t install a buzzer.

Option 2: If it works through the first cable, I could install one but would have to see if it is still possible since that cable is already embedded in the pillar.

I can't see why a door installation interface with eight wires wouldn't be sufficient. You will need to refer to the manual to determine the function of each wire.

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