Sometimes when equipment is moved or replaced, cables need to be extended. Every now and then you’ll find coiled up spare cable as a “just in case” but usually not. Here’s a few things that should happen while extending cables:
Wire color to color. If the cable you are extending has 4 conductors… red, black, white [...]
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Filed under: Tips and Tricks, Troubleshooting
I had a service call that I had to do recently that involved a pedestrian gate (a normal swing gate next to a rolling vehicle gate) that would not lock. This gate has a card reader and a maglock. The customer called and stated that the maglock would not secure. It sounded like a power [...]
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Filed under: Access Control, Tips and Tricks
When it comes to installing and servicing exterior security cameras, there are several things to consider. Below are a few of them.
Height- Sometimes when customers want cameras installed, they think that higher is always better since the higher the camera is installed, the more it will view. Make sure that you know what the camera [...]
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Filed under: Tips and Tricks, video surveillance
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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Filed under: Definitions, General Security, Tips and Tricks
Every now and then while working on access control or camera equipment, you’ll run across a bad power supply. Some power supplies merely plug into the wall and are fairly easy to replace. Supplies such as Altronix usually have high voltage electrical wired directly to them. It’s rather difficult to replace the supply if you [...]
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Filed under: Tips and Tricks
