NI 9264 - What is the use of NC port?

[CADMaster]

HI,

What is the use of the 4 NC ports available in the D-SUB model of the NI 9264 module?

Is it used to isolate sections of the output ports? Kindly explain what its intended function is and If a need to connect it to anything if I am to connect a valve or an MFC to the module.

I'm new to the NI world and not that familiar with NI modules and Labview yet. (neither am I an Electrical/ELectronics Engineer) So pardon if its a trivial question.

[crossrulz · Accepted solution]

NC = No Connection.  This means those pins are unused.  However, they do show up in the middle of the connector, so I am left to assume it was decided to break up the connector into groups of 8 analog outputs.  This may help with isolation between the two groups.  But the data sheet claims each DAC is isolated.