Thanks EVERYONE for the input.
Let me add some clarification to my situation. I have five (5) relays located in the control panel housing a PLC. I have an air compressor located 1100 feet away. Three (3) of the relays are for control signals TO the compressor. Two (2) are for feedback...
I've got a 120V relay that pulls 5.5 mA at rated voltage. The specs say it will operate at 80% of rated voltage. My circuit length is 1100 ft (one way). I've done the voltage drop calculation for #14 AWG. The loss is negligible, but I'm concerned that simply following the formula might be...
I'm designing a new controller that has several analog inputs...pressure and motor current. I have a choice of 4-20mA or 0-5VDC transducers. Is one type more desirable or beneficial over the other?
