What is the input terminal configuration of NI-9253 for?

[sjtuyans]

Hi there,

I am using a cRIO module NI-9253 in cDAQ chassis, and when I use the vi DAQmx Create Channel (AI-Current-Basic).vi to create the channel, I found there is an input named "input terminal configuration".

According to the Getting Started Guide of 9253, I think this input terminal configuration is not useful for programming, no matter I use two-wire (page 😎 or three-wire (page 9) configuration. And the purpose of the input is for other current input modules since this vi is designed for general use.

But I am not 100% sure about my understanding. Is there anyone who could help me to confirm this?

Thank you very much.

Shu

[santo_13 · Accepted solution]

Correct, Input Terminal configuration is not applicable for NI-9253. Since the DAQmx driver is common a large chunk of DAQ offering, that input is available in the driver API.

For your scenario, you can leave it as default.

[cfy2020 · Accepted solution]

Hi Shu, 

Your understanding is correct. For the NI-9253, the input is always referenced to COM and you can't change input terminal configuration for the module. 

Regards,

CF