National-instruments 24-Bit Half/Full-Bridge Analog Input Module NI 923 Manuel d'utilisateur télécharger pdf (Page 8)

NI 9237 Operating Instructions and Specifications 8 ni.com

The NI 9237 has a four-terminal external excitation voltage source

connector. You can use the EX+ and EX– terminals on the

connector to connect one external excitation voltage source to the

module. You can use the additional EX+ and EX– terminals on the

connector to wire multiple NI 9237 modules together in a daisy

chain.

Note When you insert or remove a new sensor from the

NI 9237, slight changes in the excitation voltages can

cause a mismatch between the internal half-bridge

completion resistors and the half-bridge sensors, which

results in a change in the measurement offsets.

National Instruments recommends performing bridge

calibrations of quarter- or half-bridge sensors after

connecting all sensors to the NI 9237 and after removing

or attaching any additional sensor. Visit

ni.com/info

and enter the info code

rdw9237 for more information

about changes in voltage offsets in the NI 9237.

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National-instruments 24-Bit Half/Full-Bridge Analog Input Module NI 923 Manuel d'utilisateur Page 8