05-20-2018 11:56 AM
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?
05-21-2018 09:50 AM
Hi egh06:
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.
05-21-2018 10:14 AM
Thanks for the feedback. Yes the meter is connected to a power supply.