I'll be using 4-20 ma, 2-wire, loop powered transmitters, there will be 8 of these transmitters coming into 1 PLC , what i was wanting to know is can i use the PLC's power supply to power all 8 transmitters, and would this cause a problem for the transmitters, these are not 4-wire transmitters, they do not require a seperate P.S. at the transmitter. If powered this way there will be 8 250 ohm resistors in seiries with 8 transmitters but all 8 resistors and transmitters will be in parallel with the PLC's power supply, the transmitters will control the current across the resistor's which will provide the 1-5v drop, this is what i'm not sure about . If it would be easier to scetch somthing in MSpaint or somthing please feel free to send it to me at tchavis@cei.net ......these transmitters are $550 dollors apeace, so before I buy these things I would like to know for sure if they will work, if i have to buy separate P.S. for each transmitter that would cost another $400 .....isolators are about $200 apeace so you can see where I'm going with this
thanks alot Tim Chavis