Reading Siemens logo 12/24Rco relay status on raspberry pi

Hanif

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Join Date
May 2008
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Hello every one, i have a task to read Siemens logo 12/24Rco relay status using raspberry pi. The logo is place 3m away from raspberry pi. One option is to connect GPIO pin by pullup resistor but Vcc for pin is 3.3V and there may be some voltage drop occur as logo place 3m away from pi.

Can anyone help me to resolve this issue
Fiemd.png
 
How much current does the input draw? I doubt very much. If you know the current draw of the input and the ohms/metre of the connecting cable you can easily work it out.

But i wouldn't even bother, it'll work fine.

Although i am curious... why are you needing to do this? What is the RPI doing with the input?
 

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