I'm trying to connect an AccuEnergy power meter analog output (4-20mA) signal to an existing NI 9208 spare input (AI13). Attached is the circuit diagram for the meter output (fig. 5-10 left). The NI 9208 has additional sensors being read on it that are wired as loop powered using Vsup as per page 13 of NI 9208 manual (see attached).
I assume since the AccuEnergy analog output circuit contains its own VCC, this is only a current measurement case. I assume I would then connect the meter output (+) signal to AI13 pin, and the meter output (-) signal to one of the COM pins (17 or 18) on the NI 9208. Is this correct, or should it be connected differently? Can someone confirm this?
It seems to be that way, if the power is supplied within the Meter (do you connect the meter to a power supply or does it have a battery or something like that?) you just have to measure the current coming out. And yes the connections should go to an AI pin and to a COM pin.