1_WIRE_LO_REF in NI PXI-2503

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

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.
Kyle B | Product Support Engineer | ni.com/support

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Figuring this internet stuff out is not for the feignt of heart....!
First....thank you for your initial effort.
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Go to Solution.

When using this switch in "1-wire" mode, we are essentially breaking each (+)/(-) pair into their own channels. Since this topology utilizes double pole, single throw switches whose individual terminals cannot be switched independently, another switch is introduced to decide which side of the switch is being accessed as what point in time, (+) or (-).
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Message Edited by stilly32 on 12-04-2006 04:51 PM
Message Edited by stilly32 on 12-04-2006 04:52 PM
Getting Started with NI-DAQmx
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Message Edited by stilly32 on 12-04-2006 04:51 PM
Message Edited by stilly32 on 12-04-2006 04:52 PM
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Robert,
Thanks for the information.
This seems applicable to my situation.
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Itok,
This is probably the wrong forum for this thread. Please post it here.
Have a nice day!!!
LabVIEW | LabWindows/CVI | TestStand
Certified LabVIEW Architect

1_WIRE_LO_REF in NI PXI-2503

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