I'm planning on a solution to read out the 25+ teleruptors in my household electrical system. These teleruptors provide a 230 Vac signal back output to signal a light is on or off. Normally these are used to power a signal led.
I'd rather not build things myself. What might be a feasible solution to read out these eltakos using off the shelf technology?
What model Eltako-brand Electronic Impulse Switch are you using?
http://www.eltako.com/en/switchgear-power-units/a-electronic-impulse-switches.html
ES12Z-4x
Am I correct to assume you have 25 wires from terminal 4 of each or the 25 switches going back to a central location and you want to sense the 8 to 240V 50 mA signal on each of them with an Arduino? You will either need input expansion oe an Arduino MEGA to get enough pins.
I'm not much of an electrical engineer so I'm not sure how you would safely condition those signals to something the Arduino could read.
Correct. I assume I would need an optoisolator-board to work with, but haven't found any directly compatbile.
I did find this:
http://www.ebay.com/itm/INBOARD-OPTO-ISOLATION-AC-4-INPUT-CHANNEL-INTERFACE-BOARD-KIT-/321003511333
A few of them could be connected to this: http://www.mouser.be/Search/ProductDetail.aspx?R=MR-BUSIO-MAINvirtualkey58150000virtualkey992-MR-BUSIO-MAIN
And then I would possibly be able to read everything out, using I2C. Seems quite daunting, though.
Or might 25 of these be a better solution?
http://store.extremeelectronics.co.in/ACS712-Current-Sensor-Module-20Amps.html