Query reagrding NI 9221.

[socculer98]

I'm working on a system having a PCI system with NI DAQ 6251. The input voltage range for the DAQ mentioned is -10V to +10V. We also have a terminal block in the form of BNC - 2110 which is connected to NI 6251. However, the generated voltage from a certain experiment is greater than the range specified above. We also have a cDAQ chassis 9174 and I desire to use the NI 9221 (as it is an input voltage module) to measure the input voltage/voltage generated. 

Since the sensor can be connected directly to the module using any one of Screw Terminal, Spring Terminal or D-SUB cable, is there any purpose of using the BNC - 2110? I personally believe that using the voltage module and connecting the sensor to the module will solve my problems, but I'm just asking in order to confirm.

Any kind of help would be appreciated.

[croohcifer · Accepted solution]

The BNC-2110 is just helpful for exposing the I/O with BNC connections.  It doesn't provide much added value beyond that.

If you need an input larger than +/-10 V, you'll either need to make your own voltage divider or use an input module (like the 9221) with a larger range.

[socculer98]

Thank you for your help!