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Smart Home Forum by FIBARO Team
I am using a couple of UBS sensors for a variety of applications. For example I have one connected to a twilight switch and a RAD-MOD (radar sensor, somewhat like a PIR, but much more sensitive). I am having issues with both of these, which seem to originate in the UBS.
I was reading the manual and suspect I need to change parameter 3 and 4, but I dont understand the differences. Parameter 3 and 4 valid options are:
0 Normally Closed
1 Normally Open
It is not clear to me what the difference is in how UBS handles these settings:
I understand Normally Open and Normally closed (NC is opposite of NO).
- A NO contact is low when the input is open, and high when the input is closed.
- A NC contact is low when the input is closed, and high when the input is open.
But then comes monostable and bistable. I learned from Google that a monostable relay is a relay that goes back to the start position when the current to the coil is removed.This sounds to me like a regular NO/NC contact.
Bistable is a relay that stays in its position, after the current to the coil is removed. This also sounds like a regular NO/NC contact to me.
Can someone explain what the UBS does differently when I change parameter 3 / 4?
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