Reading a battery voltage in to siemens logo

B

Thread Starter

Ben

Hi,

I am trying to read a voltage from a battery in to an analog input on my siemens logo to then turn on an output when the battery gets low. I am used to using pressure sensors to to turn on output, however I'm not sure how to do this. the battery would be 24 volts, and when it drops to for example 22 volts and output will be turned on, would I read it using resistors to convert it to 4-20ma.

Thanks for your help
 
Top