Can I use the Lynx-WEXT with my Qolsys IQ Panel 2

Yes, the Lynx-WEXT can be used with the Qolsys IQ Panel 2. In order to do this, simply wire the siren output on the panel to the trigger input on the relay. Then, wire the power supply through the relay to the external siren. This will allow you to use a high-current external sounder.

The kit outlined in this FAQ is called the Lynx-WEXT because it was initially configured to work with the Honeywell Lynx Touch Panels. At that time, the Qolsys IQ Panel 2 had not yet been released. The kit is a collection of products, made by different manufacturers, that all work together to achieve the common goal of supporting an external siren. Putting this kit together made planning a system easier, and made it less likely that customers would leave out a necessary component when ordering.

1. Power down the panel. Go to Settings > Advanced Settings > Enter Installer Code (Default is 1111 or 2222) > Power down. Once the LED goes out, unplug the transformer's barrel connector from the panel, and unplug the back-up battery.

2. Wire the components. Connect a wire from the panel's EXT SIREN terminal to the RBSNTTL Trig -*. Connect a wire from Pos + on the RBSNTTL to DC + on the AD12612. Place a jumper wire from Pos + to C on the RBSNTTL. Connect a wire from the corresponding NO relay terminal of the RBSNTTL to the positive (+) terminal of the siren. Connect a wire from Neg - of the RBSNTTL to DC - on the AD12612. Connect a jumper wire from Trig + on the RBSNTTL to Pos+ on the RBSNTTL. Connect a wire from DC - on the AD12612 to Negative (-) on the siren. Connect the negative terminal of the 1240 battery to DC - on the AD12612. Connect the positive (+) terminal of the 1240 to Batt + of the AD12612. Connect one outside terminal of the 1361-GT to one of the AC Input terminals of the AD12612. Connect the other outside terminal from the 1361-GT to the other AC input terminal of the AD12612. Verify that all wire connection are secure by gently tugging on each one.

*Terminals on the Qolsys IQ Panel 2 are spring loaded. Press the top of the terminal down with a small screwdriver. Insert the wire into the hole indicated. Then release the top, and the wire will lock into place.


3. Power on the panel. Plug in the battery, then the barrel connector for power. Press and hold the power button on the right side of the unit for 3 seconds to power it back on.

4. Test the siren. After placing your system on test with the monitoring station, if applicable, cause an audible alarm on the alarm panel. The siren will activate automatically and will follow any bell timeout programmed into the Qolsys IQ Panel 2.

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Hi Julia, just wanted to thank you and everyone for your help and support. I took your advice and got the Lynx-WEXT minus the metal cabinet as I was able to use my existing cabinet to mount it as well as my hardwire 16s with no problem. Got everything working perfect with two external sirens and a strobe light. I started my project of replacing my 20 year old alarm system myself with internet searches on DIY alarm systems and chose the Qolsys IQ panel 2 because of it's advanced features. Mind you that I had only basic knowledge of alarm systems but through the internet I was able to make it through the learning curve. I have yet to explore all the functions of the panel but was wondering if there is a way to disable only the panel siren and use the external siren as I find the ear piercing sound intolerable. Thanks
Hi Julia, just wanted to thank you and everyone for your help and support. I took your advice and got the Lynx-WEXT minus the metal cabinet as I was able to mount it in my existing cabinet along with my hardwire 16s with no problem. Got everything working perfect with two external sirens and a strobe light. I started my project of replacing my 20 year old alarm system myself with internet searches on DIY alarm systems and chose the Qolsys IQ panel 2 because of it's advanced features. Mind you that I had only basic knowledge of alarm systems but through the internet I was able to make it through the learning curve. I have yet to explore all the functions of the panel but was wondering if there is a way to disable only the panel siren and use the external siren as I find the ear piercing sound intolerable. Thanks
Yes that is correct.
Should the positive wire from the IQ 2 panel be shown as a red wire?
Hi Joe, I apologize, the diagram I first made for this ended up not being the one I used because it was quite messy. I left out an important part on this one. You need a common negative. I've updated the diagram above, but basically, you need a wire from Negate Power on the relay, to one of the GND terminals on the panel, then you should be good. Without this, the relay can't tell when it get's a short on the trigger negative terminal.
Hey Julia, I have an IQ2 panel and tried this set up with no luck. I have double checked that my wiring is correct as in the diagram. I tested the siren and wiring by connecting the siren to a 12v battery. Any help would be appreciated
If you're going to use a true "High Current" siren, it will draw more than 300 mA, so you'd be better off to use this configuration and leave the Hardwire 16-S out of the picture. You could use an RB5 instead of the RBSNTTL, and trigger it using the Hardwire 16-S and the Siren output on the panel, but since you'll still need a power supply, I'm not sure it saves you much trouble. It may save you a couple of dollars (the difference between the price of an RBSNTTL and an RB5.)
Would this same approach work when wanting to power "high current" sirens from the Qolsys Hardwire 16-s?

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