Honeywell AD12612

Auxiliary Power Supply

Honeywell ad12612 auxiliary power supply

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The Honeywell AD12612 is an auxiliary power supply that can provide continuous 6VDC or 12VDC, 1.2A power output to security system device...
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The Honeywell AD12612 is an auxiliary power supply that can provide continuous 6VDC or 12VDC, 1.2A power output to security system devices that require supplementary power. The power supply also has a charging circuit which can be used to charge a backup battery like the Ultratech 1240.

Honeywell alarm control panels have an auxiliary output that can supply a limited amount of power to devices that require power such as alarm keypads, AlarmNet alarm monitoring communicators, wireless receivers, wired motion detectors and wired glass break detectors. When you connect devices to the ECP terminals of a Honeywell VISTA Series alarm control panel you must be sure to not exceed the maximum auxiliary output. A residential VISTA-20P or VISTA-21iP alarm control panel auxiliary power output is 600mA and a VISTA-128BPT or VISTA-250BPT commercial alarm control panel provides up to 750mA of supplementary power. If the power load from all of your wired devices exceeds the maximum auxiliary power output of your alarm control panel, you will need to connect some of the devices to an auxiliary power supply like the Honeywell AD12612.

The AD12612 power supply is set up by default to provide 12VDC, 1.2A of power output but you can move the jumper over to the right (2) pins if you want to use the power supply to provide 6VDC, 1.2A power output instead. Underwriters Laboratories (UL) has not approved the use of an AD12612 power supply when supplying 6VDC of output power and nearly all alarm devices require 12VDC of auxiliary power so you shouldn’t need to change the jumper. When using the 12VDC mode, you should use the Honeywell 1361 AC transformer and you should use the Honeywell 1322/TF3 transformer if you are going to use the 6VDC power output option. By connecting either of these AC transformers, the Honeywell AD12612 will be able to push the 1.2A of 6VDC or 12VDC supplementary power to the connected devices.

Unless you also connect a 12VDC, 4AH sealed lead-acid backup battery to the AD12612 power supply, your connected devices will not work during a power outage. The power supply charging circuit has a charging voltage of 13.6VDC and a maximum charging current of 130mA. If using a backup battery with your AD12612, you must subtract 130mA of power output from the maximum 1.2A output when calculating the available load for your connected devices. If you lose power or the AC transformer fails, the backup battery will provide (24) hours of standby time at a 200mA drain level. The battery is protected by a PTC device for overcurrent situations and the PTC device automatically resets once the overcurrent situation is resolved.

The Honeywell AD12612 is the recommended auxiliary power supply to power the Tuxedo Touch and Tuxedo Touch WIFI graphic touchscreen keypads. Simply connect the (2) ECP terminal wires for power from the Tuxedo keypad to the (+) and (-) ‘DC OUTPUT’ terminals on the AD12612. You should also connect a black wire jumper between the (-) ‘DC OUTPUT’ terminal on your power supply and the ‘AUX -’ ECP terminal on your alarm control panel.

The AD12612 power supply is also recommended when adding an external sounder to an L5100 LYNX Touch wireless alarm control panel. As the L5100 LYNX Touch doesn’t have an alarm output, it cannot supply the auxiliary power needed to drive an external alarm siren. Therefore, you need to connect an AD12612 to a Honeywell 5800RL wireless relay or a wired sensitive relay like the Altronix RBSNTTL sensitive relay and also to whichever wired sirens you’d like to use with your LYNX Touch control panel. The LYNX Touch must then be programmed to activate the relay on each alarm so that the power supply drives power out to the connected sirens.


Yes, the AD12612 power supply supports up to 1.2A and each 6280 only draws up to 270mA each. I would recommend getting a Tuxedo Touch WIFI ( instead of a 2nd 6280 though as it's a newer and better touchscreen keypad that also has a built-in Z-Wave controller. Finally, is your 21iP monitored now? We offer no-contract monitoring plans at and as long as you aren't under contract with another company now, it's very easy to switch to us.
Hi, I currently have this power supply for my vista 21ip, I have one 6280 touch keypad. Do you think this power supply would be adequate if I hooked up a 2nd 6280 touch to it? Thanks for your help!
If you are using the AD12612 as the power supply for your siren, you'd want to connect the siren wires to the DC output. The flying leads (black and red) are meant for the battery terminals so the aux power supply stays on if you lose AC power.
Should I connect the wired siren to the DC output or the battery output? Thanks.
Thank you Sterling. Looks like I need to find a different charger. Maybe an Elk P624. Will start researching. Take care.
Honeywell's internal tech site says to "Use a standard 4AH, sealed lead-acid type." but doesn't state why they say to only use a 4AH battery so we would suggest going with Honeywell's recommendation to be safe.
Will the AD12612 handle the load of a 12V 7ah battery? Would I need to add a current limiting resistor? Values: ohm=?, Watts=? Note, Aux load: Std-by = 225ma, Active 612ma. Residential. Self install. Thank you.
Thanks for your help!
The operating voltage is rated at 9VAC 15VA or 12VDC 100mA so both types of input power would work but we do recommend the AD12612.
You could use the STI EM080735 ( ) which isn't an "in-wall" enclosure but mounts to the wall and could house the AD12612 and a backup battery.
I'm confused. The 5800RL manual says it takes as input 9VDC, but the same manual recommends this power supply that delivers 12VDC. Which one ist it?
What in wall metal enclosure to you recommend using?
Thanks for the quick reply. Greatly appreciated!!!
No, you have to use the 1321 or 1361 transformer to power the panel and the AD12612 requires it's own separate 1361 transformer.
Is it possible for the AD12612 to power the actual vista panel in addition to other aux items? I am trying to only use 1 transformer instead of 1 for the panel and 1 for the APS. Thank you
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