So I have (multiple series) loops and each loop contains magnetic window switches, as well as shock sensors in between the (Anderson style) windows. I can’t wrap my head around how that works. Honestly nobody has ever set off the shock sensors and I’m not sure they are doing anything. I took a multimeter and isolated one shock sensor. There are 4 wires, but the installer only used two of them. There’s continuity between the wires. When I hit the sensor it very briefly fluctuates ohms, but within a second, there’s continuity again. Can something like this actually work? A split second change in resistance? It’s an older ademco vista 20 system. Any info would be greatly appreciated.
Most systems have a response time of less than half a second, so yes it should work fine, though its designed to catch a window breaking, so they can sometimes take a decently good hit before triggering. Otherwise youd run into false alarms. Its a bit unique that your shock and contact sensors are all wired in the same loop, but they're all 2-wire sensors, so they should all just be wired in series.
A passive infrared sensor detects a change of heat ( raised or lowered) within an area of vision. These areas are much like looking down a conduit tube but there are many of them ... typically 30 give or take. These ares, via the freznel lens, are directed onto the pyro-sensor, much like a camera lens onto film. When someone move in the area covered, the detected heat sourses 'dance around' the pyro sensor - These are anylized by the electronics to then trigger an alarm activation. Alarm eng. UK
Hi. I have 4 IR beams ( 2 receivers & 2 transmitters) that i need to connect on 1 zone. How do i do that, cause when i connect the 2 NC & 2 Common to the one fron the panel, it doesnt work.
You confuse infinite resistance. Closed circuit has negligible mOhms of impedance, in boolean logic interpreted as 0; or when EOL is set, 5.6kOhms is considered 0; whereas Infinite resistance is exceedingly high value, a 100% voltage drop - an open circuit, or a dry and sober tech in-line 😂 1. Also, speaking of serial wiring, next time you have repetitive false alarms at night on a zone with 18 splices, you’ll be extra happy your installer didn’t do it, saving a couple of expanders and sleepless nights. Otherwise, good video to send new techs understand science of electrical connections.
So I have (multiple series) loops and each loop contains magnetic window switches, as well as shock sensors in between the (Anderson style) windows. I can’t wrap my head around how that works. Honestly nobody has ever set off the shock sensors and I’m not sure they are doing anything. I took a multimeter and isolated one shock sensor. There are 4 wires, but the installer only used two of them. There’s continuity between the wires. When I hit the sensor it very briefly fluctuates ohms, but within a second, there’s continuity again. Can something like this actually work? A split second change in resistance? It’s an older ademco vista 20 system. Any info would be greatly appreciated.
Most systems have a response time of less than half a second, so yes it should work fine, though its designed to catch a window breaking, so they can sometimes take a decently good hit before triggering. Otherwise youd run into false alarms. Its a bit unique that your shock and contact sensors are all wired in the same loop, but they're all 2-wire sensors, so they should all just be wired in series.
@AlarmSystemStore Thanks very much for your response. I appreciate it.
*If you walk past a motion sensor normally clothed - but walk slowly past it without clothes on - would it still set off the alarm panel?*
Clothes has no impact on a motion sensor.
A passive infrared sensor detects a change of heat ( raised or lowered) within an area of vision. These areas are much like looking down a conduit tube but there are many of them ... typically 30 give or take. These ares, via the freznel lens, are directed onto the pyro-sensor, much like a camera lens onto film. When someone move in the area covered, the detected heat sourses 'dance around' the pyro sensor - These are anylized by the electronics to then trigger an alarm activation. Alarm eng. UK
@@AlarmSystemStore Imagine if it did 🤣🤣
@@kevportillolet’s start a rumor that they do and see if burglars start going naked 😂
Hi. I have 4 IR beams ( 2 receivers & 2 transmitters) that i need to connect on 1 zone. How do i do that, cause when i connect the 2 NC & 2 Common to the one fron the panel, it doesnt work.
If they are NC they should be wired in series. May need a resistor as well if your panel requires them.
@@AlarmSystemStore Thank you. I put them on NO and they are working. Also put a resistor on each.
A description of wiring a door contact and a sensor on a line
You confuse infinite resistance. Closed circuit has negligible mOhms of impedance, in boolean logic interpreted as 0; or when EOL is set, 5.6kOhms is considered 0; whereas Infinite resistance is exceedingly high value, a 100% voltage drop - an open circuit, or a dry and sober tech in-line 😂 1. Also, speaking of serial wiring, next time you have repetitive false alarms at night on a zone with 18 splices, you’ll be extra happy your installer didn’t do it, saving a couple of expanders and sleepless nights. Otherwise, good video to send new techs understand science of electrical connections.