I don't know the correct drawing symbols to use for ANALOG I/O devices. I'm generating some documentation of our PLC setup, I'm very familiar with DIGITAL I/O, and I've got a good CAD library of DIGITAL I/O devices (Pressure switches, relay coils, etc), but now I have to draw in some pressure and level sensors, and valve positioners, and I'm not sure what the symbols should look like?Can anyone provide some examples, or point me to a website with some examples?
Thank you