1_WIRE_LO_REF in NI PXI-2503

[Mihye]

Hello,

I've used NI PXI-2503 (serial ports) to read current output signals from a circuit, and 1_WIRE_LO_REF has been used for reference (voltage input to the circuit?). To switch over to parallel communication, I will use SCB-68. In this box, I have no idea which port is equivalent to 1_WIRE_LO_REF. Which port should I use in SCB-68?

Thanks,

Mihye

[_kb]

Hi Mihye,

The SCB-68 numbers the screw terminals in such a way that they correspond with the pin numbers in the device pinout for hardware with a 68-pin connection.  Checking the pinout on page 5 of the 2503 specifications, it looks like pin 22 is the 1_WIRE_LO_REF line, so you should connect the reference signal to the screw terminal labeled 22.