So what’s the difference between MBS (Magnetic Bond Sensor) and DSM (Door status monitor)?
DSM senses when the door is closed whether it is locked or not. These are commonly used for alarm systems, access control systems or any other type of system that would require knowing if the door is closed or not.
MBS is used [...]
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Check out the link at the bottom of this article.
Ever been confused about OHMS law? This video makes it extremely easy.
I= V/R
I= current
V=voltage
R=resistance
Leave a comment if you’ve got a question or additional information. Thanks!
in reference to: Make: Online : MAKE presents: Ohm’s Law (view on Google Sidewiki)
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In this article, we will discuss the term fail secure. As we discussed in the article on fail safe locks, they require power to lock. The fail secure locks are the opposite. With no power at all they are locked. They only time power is applied to them is to put them in the “unlocked” [...]
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Fail Safe versus Fail Secure
If you’ve worked around or dealt with access control locks at all you’ve probably heard of the terms fail safe and fail secure. These may seem to mean the same thing since safe and secure seem to be on the same side of fence versus unsecure and unsafe. Well, in the [...]
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Alarm contacts tied to security systems… whether they be burglar alarms, fire alarms, access control systems or even inputs on some video systems… are wired in either a “series” or “parallel” fashion. I found a good diagram of window contacts wired in series…
Actually if you just search for series or parallel wiring on the [...]
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So what is security? Well, Wikipedia defines security as:
The word security is derived from the Ancient Greek “Se-Cura” and literally translates to “without fear”. ‘Security’ is therefore the state of being secure, or the actions employed to achieve that state, i.e. to be secure is to be without fear of harm.
I guess my definition would [...]
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Filed under: Definitions, General Security
