Deciding Whether to Use 2-Wire or 4-Wire Smoke Detectors

Deciding Whether to Use 2-Wire or 4-Wire Smoke Detectors


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Description

https://www.alarmgrid.com/faq/how-do-i-know-whether-to-use-2-wire-or-4-wire-smoke-detectors http://alrm.gd/get-monitored.


Transcript

hi DRS Joe from alarm grid and today we're going to talk about whether you should use a two hour or a four wire smoke detector today I have a two hour smoke detector but the four wire smoke detector of this particular model looks exactly the same and they do the same thing so why use a two wire or a four wire the main difference between the two ir and the 400 hour smoke detector is that one works with two hours and one works with four wires a two wire smoke detector has a pair of wires going back and connecting to the alarm system these two wires handle power and data for the smoke detector on a four wire smoke detector this is broken up so one pair is going to be for the data connection and one pair is going to be for the power connection either of these smoke detectors actually need their power to be cut when an alarm occurs so that they can reset on a two wire smoke detector if you have it connected to a vista alarm system zone one on that vista alarm system has a power reset feature that means is that when this two hour smoke is connected to that alarm system after an alarm occurs and the user disarms the alarm system that's going to temporarily cut power to the slope detector so that it can reset it's a really nice aspect of a two-hour smoke with a vista system or any other system that does that particular function for wire smoke detector has two wires dedicated for its power and two are for two wires for its data what that lets you do is gives you a little more flexibility for installation because you can't install it on a system that doesn't have a dedicated power reset terminal like a vissa you could wire up the smoke detector to a relay and a power supply so that the power could be cut whatever particular alarm system goes into alarm so the smoke detector can reset so as you can see depending on what installation you're going to put the smoke detector into could change whether you're going to use a two-hour submit detector or a four wire smoke detector you have a wireless system also there's an even better chance that you're not going to use a wired smoke detector at all and you just put a wireless one up you do have a Vista system or a system with a power reset function on it though the two are smoke is going to be easier to install as you just have to get a pair of wires from the alarm system to the smoke detector wire it up then you're good to go on the Vista system as an example you can install more than one to our smoke on to that single terminal all you have to do is wire them up in parallel put a resistor at one of the smokes to be that end-of-line resistor ideally you want to put it on the one farthest away from the panel so that the whole line is supervised and you'll be good to go now let's talk about power supervision on a four wire smoke on a four wire smoke we have two connections for data two connections for power our data connection is likely going back to our alarm panel to an open zone and our power connection is likely going back to either the alarm panels power outputs or an auxilary power supply most smoke detectors are normally open so if something happens to the power connection to the smoke detector there's nothing in the smoke detector that's going to tell us that something's wrong with the device what you can do to remedy this is install a power of supervision relay module and if you have questions about installing these or how to set it up check our website out or give us a call because it can be tricky and a little confusing basically what this does is that it sits and it monitors the power connection to the smoke detector if something goes wrong with the power the relay is going to open and put the smoke into trouble telling you or us that something happened to the power coming to the smoke detector this is a really helpful device especially if you have four wire smokes installed because you do want to know if they have power applied to them or not you just have to make sure that the smoke detectors that you do install don't exceed the maximum amount that the panel can handle and if you check the panel's installation manual it will tell you what it can do or not so again if you have any questions about whether or not you should use a two hour or four wire smoke what works for your system really if you should go wireless in general feel free to give us a call at eight at eight eight one eight seven seven two it send us an email to support alarm Broadcom or heard or website wwlp.com did enjoy the video feel free to subscribe and if you want to be notified when I post future videos hit the notification button below and we'll send you an update when we do so thanks for watching have a great day


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