Is there any way to get a non-isolated IF8 CompactLogix I/O module to behave like one of the isolated IF4I modules? I'm wondering if I can leave the ANLG COM floating and that will work.
The issue I have is I have mixed 2-wire (loop powered) and 4-wire (externally powered) devices and I bought an IF8 card. I'm hoping there is some way I can get the card to work for both types of inputs. My 4-wire devices are powered by remote external power supplies and I can't link the commons like the IF8 documentation says (my inputs are coming from a Micromotion and another flowmeter, both 120VAC powered with their own internal power supplies). I'd like to wire the card so it behaves just like a simple 250 ohm resistor, I have the loop put the 4-20mA across it and it reads the 1-5VDC. Is that configuration possible with an IF8 or do I have to get an IF4I?
Thanks in advance.
Greg
The issue I have is I have mixed 2-wire (loop powered) and 4-wire (externally powered) devices and I bought an IF8 card. I'm hoping there is some way I can get the card to work for both types of inputs. My 4-wire devices are powered by remote external power supplies and I can't link the commons like the IF8 documentation says (my inputs are coming from a Micromotion and another flowmeter, both 120VAC powered with their own internal power supplies). I'd like to wire the card so it behaves just like a simple 250 ohm resistor, I have the loop put the 4-20mA across it and it reads the 1-5VDC. Is that configuration possible with an IF8 or do I have to get an IF4I?
Thanks in advance.
Greg