Fibaro FGK-101 question

Other Devices & Integrations Door Locks & Sensors
1

I just want to make sure the Fibaro window sensor can accept other magnetic contacts wired in series like other window sensors. I have banks of 4 windows and I don’t want to purchase separate sensors for each one.

I know the included magnet will not be used and I’ll have to wire 4 in series.

Also, would I purchase normally open or normally closed contacts?

2

The instruction sheet that comes with the sensor and is also available online http://www.fibaro.com/files/instrukcje/eng/DoorWindowSensor%20FGK-101-107%20ENG_v21-v23.pdf says:

The Fibaro Door/Window Sensor has a one, potential-free IN input. IN input status may be modified through the Sensor itself or by sending GND signal to IN (diagram 3). If the Door/Window Sensor will be used only as a binary sensor, do not install the magnet.

Also, would I purchase normally open or normally closed contacts?
Since you're wiring in series, these would have to be normally closed.
3

The thing with reed switches is that the “normal” condition is ambiguous! 99.9% of reed switches are closed when the magnet is present (in your case, when the window is closed) & these are the ones you want to wire in series. They could be sold as either normally closed or normally open, but they are the same thing.

The other kind rely on balanced magnets and are far more expensive

4

The instruction sheet that comes with the sensor and is also available online http://www.fibaro.com/files/instrukcje/eng/DoorWindowSensor%20FGK-101-107%20ENG_v21-v23.pdf says:

The Fibaro Door/Window Sensor has a one, potential-free IN input. IN input status may be modified through the Sensor itself or by sending GND signal to IN (diagram 3). If the Door/Window Sensor will be used only as a binary sensor, do not install the magnet.

Also, would I purchase normally open or normally closed contacts?
Since you're wiring in series, these would have to be normally closed.[/quote]

I assume that’s a yes then. Contact sensor is the same as a binary sensor… 1 or 0.

Thanks.