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Hello Good people. I come to You with a question I have about my recently installed DIY home alarm system. I have made a system of a mixture of wired and wireless sensor in case of more clever intruders. When I installed my system I noticed a set of terminals on the back of the alarm system that I can not figure out what is used for. The connections are labelled 'Normally Closed' (NC) + GND - just like my hardwired sensors I reckon. What is this used for? How Can I utilize it? The User manual states that it is for external devices that require a N.C. signal and a motor is given as example. Since the entire system is powered by a small samsung 5V1A usb adapter, I figure it is very unlikely the intention, that I power a motor through this alarm system. If it was a N.O. connection I could use it to turn on a relay incase of an alarm - but since it is N.C. I just can't figure out how it's applicable? It is not for powering sensors either because there is another dedicated 9V connection for this purpose. I'm trying to think of any scenarios where and why this connection is useful - In other words, I would like to make use of it my self but need help on figuring out what I can do with it. I'm not from the UK so please excuse me on misspellings or grammar errors.
