Power Supply for an Ecolink sensor Question

[Dave 401]

Hey Engineer Type Folks,

 

I have a power question for you.  I have an idea to mount a couple of these sensors in a central location instead of putting them on each individual window or door.  I chose this switch because it has a wired input on the board.  I was able to pull the wires from my alarm panel and put it on this sensor and get a door to trip it. 

 

http://www.amazon.com/Ecolink-Z-Wave-Window-Sensor-DWZWAVE2-ECO/dp/B00HPIYJWU

 

The sensor has ha 3 Volt battery.  It's a CR123A Lithium battery.  Naturally, if I put these all in one spot I would like to power them without batteries and then put a UPS behind that power supply.  I don't know where to look in order to get started.  Also, if I need to make modifications to the power supply or cut some wires I want to make the best guess possible for the first test.

 

How many switches? I don't know yet honestly.  I am having trouble finding wiring for some windows. Could be 5 to 10 sensors.  

 

Maybe I check Radio Shack on their last few days left in business?

[schoondoggy 745]

Are you thinking one power supply per sensor or running wires from sensors back to a single central supply?

[Dave 401]

I was hoping for a single power supply.  I would run wires rudely or maybe to a wireblock mounted somehow.

[schoondoggy 745]

I am trying to find an operating current draw number to help size the PS

[schoondoggy 745]

The batteries for these are 1500mAh and they say they will last fro 3 years. so power draw would be very low. I would start with one of these:

http://www.amazon.com/Ariic-BRAND-Power-adapter-supply/dp/B00IX6TSGA/ref=sr_1_3?ie=UTF8&qid=1424324611&sr=8-3&keywords=3v+power+supply

 

If you need more power:

http://www.radioshack.com/pyramid-ps3-3a-power-supply/55057675.html#.VOV61pjF_V9

 

and a step down converter 12v to 3v.