Hello, I have the following problem. For some reason, the electricians ran the cable from the door contact to the technical room instead of to the outdoor station of the doorbell. At the outdoor station, only a network cable is installed. This cable goes into the technical room. Since all the intercom systems so far have the contact at the outdoor station, I am unable to open the door (door latch). Is there any solution to this problem? My intercom system is PoE. Installing new cables, etc., is not possible. Thank you.
BobRoss schrieb:
I have no experience with Metzler, but the IP door station from Doorbird offers two secure ways to control the door contact from inside: either via a relay contact on the indoor station or through a separate I/O door controller installed in the technical room. For technical intruders, connecting the door contact directly to a switching relay on the outdoor station is not much of a challenge. With Metzler, it’s similar in that there is a door controller for the technical room, which I have also ordered. However, I didn’t consider that when the wiring was done here. Now there is a line from the door to the technical room and a network cable with a keystone module (PoE) from the outdoor unit as well. But I can’t control the door controller with that...
My current idea is to ask Metzler if they can exchange the LAN version for a 2-wire IP version. That way, it might be possible to split the existing LAN cable. Let’s see if they agree...
Theoretically, yes. The problem is that apart from the network cable, there is no cable running to the technical room, and I need that for PoE and communication with the internal stations. Although there is a power supply in the flush-mounted box, the cable only goes as far as the nearest socket.
So, I can’t get the signal from the relay outputs all the way to the technical room...
That’s why the idea is to convert from PoE to 2-wire.
So, I can’t get the signal from the relay outputs all the way to the technical room...
That’s why the idea is to convert from PoE to 2-wire.
filosof schrieb:
With Metzler, there is also a door controller for the technical room, which I ordered as well. However, I didn’t consider it when the wiring was installed here. Now there is a cable running from the door to the technical room, and also a network cable with a keystone module (PoE) from the outdoor unit. But I can’t control the door controller through this setup...
My current idea is to contact Metzler to see if they can exchange the LAN version for a 2-wire IP variant. That way, it might be possible to split the existing LAN cable. Let’s see if they agree... As I mentioned, my system with camera, NFC, etc. is only available in Metzler’s PoE version.
I’ve given that some thought as well. Since I only have the network cable from the outdoor station to the technical room installed, the cable would need to be split. This means using the 2-wire version for signals like the doorbell, and the remaining wires as RS485 signals to control the relay in the technical room. The problem I see is that different signals are being carried over a single cable bundle.
Basically, the signal is sent from the indoor station’s display to the outdoor station, which then switches a potential-free contact. So some kind of network communication must take place here.
The question is how tech-savvy you are.
I run a home server with Home Assistant. It reads the data between the indoor and outdoor units. I get all the information there (doorbell, commands from the indoor unit, etc.) as well as the camera image. Through this, I control a Nuki door motor. Of course, you can also control a Wi-Fi relay. Since the indoor unit has two "buttons" for unlocking, I use the second one for the garage. I also receive NFC data.
You could also, for example, install a Shelly Uni on a contact from the indoor unit to read the relay status and trigger another relay over IP.
I run a home server with Home Assistant. It reads the data between the indoor and outdoor units. I get all the information there (doorbell, commands from the indoor unit, etc.) as well as the camera image. Through this, I control a Nuki door motor. Of course, you can also control a Wi-Fi relay. Since the indoor unit has two "buttons" for unlocking, I use the second one for the garage. I also receive NFC data.
You could also, for example, install a Shelly Uni on a contact from the indoor unit to read the relay status and trigger another relay over IP.
sysrun80 schrieb:
The question is how tech-savvy you are.
I have a home server running Home Assistant. It reads the data between the indoor and outdoor unit. I receive all the information there (doorbell rings, commands from the indoor unit, etc.) and the camera image. I use this to control a Nuki door motor. Of course, you can also control a Wi-Fi relay. Since the indoor unit has two "buttons" for unlocking, I use the second one for the garage. I also receive NFC information.
You could also install, for example, a Shelly Uni on a contact of the indoor unit to read the relay status and switch another relay over IP.I can manage that.
Do you get the data via the network interface (if the interface is open, there should be a specification for it), or via another interface (RS485, etc.)? I assume the connection between the indoor and outdoor unit isn’t a simple UDP or similar protocol. So just reading should (only) be possible through a switch with a monitoring port.
Or how should I imagine it?
Thanks, regards
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