Honeywell 300-04705

LYNX Touch & Lyric Power Supply 9VDC, 2.5A

Honeywell 300 04705 lynx touch l5100 power supply 9vdc 2 dot 7a

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The Honeywell 300-04705 is a power supply used to supply primary power to the Honeywell LYNX Touch systems (L5000, L5100, L5200, L5210 or...
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The Honeywell 300-04705 is a power supply used to supply primary power to the Honeywell LYNX Touch systems (L5000, L5100, L5200, L5210 or L7000) and the new and improved Lyric system. The 300-04705 is a (2) prong plug-in power supply that converts 110VAC power coming out of your standard American wall outlets to a usable level for the LYNX Touch and Lyric security systems. This power supply can only accept power inputs between 102-132VAC. If you are using this product internationally be sure to use a separately purchased adapter so that this power supply is plugged into a power source that offers AC voltage within that range.

The 300-04705 plug-in power supply is included with each new L5200 or L7000 LYNX Touch wireless alarm control panel so that you don't need to purchase a transformer separately. The power supply has a 9VDC, 2.5A output which supplies the needed voltage to power the LYNX Touch alarm control panels. Unlike the K1914WH AC transformer that powers the L3000 LYNX Plus wireless alarm control panel, you must observe polarity when connecting the 300-04705 to your alarm control panel. The screw terminals on the backside of the 300-04705 power supply are labeled ‘+’ and ‘-’ to ensure you don’t accidentally cross the wires and damage the power supply.

To connect the Honeywell 300-04705 power supply to your LYNX Touch wireless alarm control panel you will need either the LT-CABLE or a length of (2) conductor alarm wire. If you choose to use the LT-CABLE, it will be much easier to connect the power supply to the control panel. The LT-CABLE has a DC plug on one end and (2) spade connectors (one red and one black) on the other end so wire stripping is not required.

If you do not use the LT-CABLE, you will need to make the connection between the wireless alarm control panel and the Honeywell 300-04705 power supply using (2) conductor 18/20/22 gauge alarm wire. If you use #22 gauge wire, the distance between the power supply and the control panel must not exceed 11’. If you use #20 gauge wire, you can use a maximum distance of 20’ between the power supply and the alarm panel. Finally, with #18 gauge wire, you can extend the connection up to a maximum of 26’. You will need to strip both ends of the wire after cutting the appropriate length. You will connect the red wire at one end to the ‘+9VDC’ terminal on the alarm system's circuit board. The black wire at the same end will connect to the ‘GND’ terminal at the panel. The red and black wires at the other end will be landed under the screw terminals on the backside of the 300-04705 power supply. Make sure to land the red wire lead underneath the screw labeled (+) and the black wire under the screw labeled (-); otherwise you run the risk of blowing out your power supply. Also, make sure there is no exposed copper wire showing on either end of the connection. All exposed wire should be completely inside the terminal block of the screw terminals and completely under the screw heads of the 300-04705. Once the power supply is blown, you will not be able to fix it and you will have to purchase a new 300-04705. Alarm Grid does not offer refunds on power supplies so be very careful when making your connections.

Even though the battery backup will continue to power the alarm control panel (for up to (4) hours with standard capacity battery) after AC power is removed, you do not want your power supply to become unplugged by someone that may not know it is powering your security system. Therefore, we recommend using the included screw that is attached to the plastic flange at the top of the power supply. You will need to first unscrew the screw that holds your plastic outlet cover in place. Next, you will need to plug the 300-04705 power supply into the bottom plug. Finally, use the power supply’s screw to secure the 300-04705 to the wall plate. The screw will keep the power supply from accidentally becoming unplugged and will secure the outlet cover to the wall outlet. The screw only interfaces with a standard duplex outlet. If you have a decora style outlet you may want to consider swapping your outlet out. Make sure to kill the circuit breaker before working with your home's electrical!


LYNX Touch Transformer
Submitted on 10/22/2012

When I hooked up my LYNX Touch I accidentally wired the power supply first and then touched the red and black wires. Oops! I had a hard time finding this part until I came across Alarm Grid. Talked to someone there that suggest the LT-Cable along with this and I had a much easier time hooking it up the second time. Dont touch wires!

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Hi Todd, The dimensions for this transformer is 3 1/2 inches long, 2 inches wide and 3 1/2 high. In theory it could work if the recessed box provides a recessed outlet and has enough room for the transformer. I don't think you'll find one that fits a normal outlet size though so the recommendation is to just plug the transformer into a regular wall outlet, running the wire through the wall so that you don't see it exposed. Honeywell doesn't list the max wire length for 14 gauge wire but per the installation guide, you can use wire up to 8 feet long when using 22 gauge, up to 13 feet long when using 20 gauge and up to 20 feet long when using 18 gauge so you can assume to get somewhere around 20-30 feet if you use 14 gauge.
What are the dimensions for this transformer? Is this the same transformer for the lyric panel and the lyric add on panels? I would like to install these behind the lyric panel and the addutional panels in a recessed electrical box if possible.Do you offer any such box? If i cant install in a recessed box due to the transformer size, do you know the max distance on 14 gauge wire? Thanks in advance
The 5800 Series sensors ( ) that work with the LYNX Touch panels typically work up to 200' from the system in most locations. If you went with the new Lyric system ( ) it supports the same 5800 Series sensors that the LYNX Touch panels use but it also supports newer SiX Series ( ) sensors that can work up to 300' from the system. What would be the maximum distance between the system and the further sensor in your office?
was wondering what kind of coverage the honeywell lynx will provide. Have an office space that I'd like to install it in, but not sure all the sensors will reach the lynx unit.
The Lyric controller ships with the appropriate transformer and this is the one.
Does this work with the lyric system? If not can you please tell me which one does, thank you.
Unfortunately, we don't have access to a 220V power supply so you would need to use a step-down power converter.
Hi The input power on these are all 102 - 132 VAC. I’m in Australia, so obviously I am on 220V supply. So question: does Honeywell cater for the 220V parts of the world so I don’t have to plug a transformer into another transformer and burn my house down?
The LYNX Touch does need power from the supplied transformer. You can potentially use the wiring from an old system to make the connection between the panel and the transformer but you must make sure to stay within the wire length and gauge limits spelled out in the installation guide.
Can the lynx touch use the power provided by the tradition alarm panel, or is it required that the wiring to the transformer be used?
Oh god!! So sad.
Unfortunately, Honeywell switched the voltage rating on the transformer about a year ago and we can no longer source the versions that were rated up to 240V. If you use a device like the one at, you should be able to get power to your system though.
Hi Alarmgrid team, I got problem of power supply unit. I purchased Honeywell L5200PK-Wifi from your website. I tought that power supply unit is 100-240V input but I received 102-132 V one. It could be use in my country(Thailand). Do you have other one for me.
We look forward to getting you activated as well Kent! Let us know if you need anything else.
Thanks for the reply Sterling! Yes, the connections are on the the backside between the transformer and wall. However, since it's an open design there's still some space there where you can get your fingers in there and on the terminals. I might cover that channel opening somehow just as a preventative measure. Should be fairly easy to come up with something to do that. Thanks again and I'm looking forward to my service with AlarmGrid!
Yes, the output on the transformer terminals should be 9VDC so while we don't recommend touching them, it would only be a low voltage shock. Typically, when the transformer is plugged in, the connections should be on the backside so that no one could really accidentally touch the contacts or the bare wires.
Hi. I'm a bit concerned about a possible shock happening at the open terminals on this transformer where my two alarm 22 ga wires connect. Should I be? I'm assuming the power at this point has already been stepped down to only 9v and it should be harmless to touch, right? Just want to be sure. Thanks!!
The dimensions are 4 inches by 2 1/8 inches. You should measure your recessed outlet to be sure. I recommend a recessed duplex and confirm the specs first. Also, keep in mind that the power connections come off the bottom so it might be slightly larger than 4 inches with those.
will this fit if i plug it into a recessed outlet? i want to hide the power adapter
No, unfortunately, Honeywell has changed the power input and it now only supports 102-132V, 60 Hz.
Hi the image indicates the power supply supports 100-240V 50/60 Hz ,is this correct ?
No, you'll need to use a step down converter.
Do you have this power supply that run 220vac? I am going to use it in Thailand.
Thanks Frank; I suspect it has something to do with the net load on the line. Thanks for the suggestion.
Have you used a circuit tester and tested the switch for proper wiring? I would imagine its a miswire of some sort. The panel does not draw enough to trip the GFI.
Has anyone experienced a situation where this device coupled with the L5200 starts to regularly trip the GFI Switch? Is it possible the L5200 requires too much power, or more likely that I have a loose wire?
If the power supply was properly installed then only the red and black should be connected. As long as the green and white are not connected to the screw terminals on the power supply then you should see the panel boot back up.
Sorry for all the typos I typed this up with my phone.
Hi I have this power supply on my Lynx touch and will I was cleaning I got my brush handle caught underneath the cable that is connected to the power supply. I looked at it to see if I had broken it and noticed the red and black wired are still connected to the power supply. However there are also a green and white wire that is not connected. I was wondering if I had ripped those out or are they intended to be left in connected. The cable information is.. HONEYWELL P/N 1104 4C22 3038058 Thanks for your help!!
Yes you can. FYI, this transformer is included in the purchase of the L7000 so you will not need to purchase it separately. However there is no power cable. You can custom cable it using 18 - 22 gauge alarm wire or purchase the LT cable ( which is 8 feet in length. The LT cable serves for easier reboots with the male DC plug rather than raw, stripped leads when you custom cable. You can plug the transformer into any 110V AC receptacle. You can plug it into your UPS. We are glad you have enjoyed our YouTube Videos! Happy New Year!
Can I plug this in in my basement directly below the wall on which I will mount the Lynx Touch 7000, so maybe an extra 8-10ft? Secondly instead of a regular outlet, could I plug the transformer/power supply in to a UPS? Thank you - Chris Great YouTube videos for the DIY'r
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