Rtd0 - National Instruments NI 9217 Operating Instructions Manual

National instruments analog input module operating instructions and specifications

Hide thumbs Also See for NI 9217:

Table of Contents

Excitation

Current

4-Wire EX

RTD+

Filtered

ADC

Amplifier

3-wire & 4-wire

RTD–

Detection &

Compensation

COM

NI 9217

Figure 3. Input Circuitry for One Channel of the NI 9217 in 4-Wire Mode

Each channel has one terminal, RTD+, to which you connect the

positive lead of the RTD signal and one terminal, RTD–, to which

you connect the negative lead of the RTD signal. Each channel also

has a common terminal, COM, and an excitation current source

terminal, EX. You must connect the COM terminal to RTD–. All

four COM terminals are internally connected to the isolated ground

reference of the module. If you are using shielded wiring, connect

one end of the shield to the COM terminal. Refer to Figure 4 for an

illustration of how to connect an RTD to the NI 9217.

NI 9217 Operating Instructions and Specifications

Table of Contents