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Figure 5. input circuitry for one channel, R to figure 5, Voltage and current modes – National Instruments NI 9219 User Manual

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© National Instruments Corp.

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NI 9219 Operating Instructions

Figure 5. Input Circuitry for One Channel

Voltage and Current Modes

In Voltage and Current modes, connect the signal source to the
NI 9219 across the HI and LO terminals. The current is computed
from the voltage that the ADC measures across an internal shunt
resistor. Refer to Figure 6 for an illustration of the connections.

Figure 6. Connections in Voltage, Current, and Digital In Modes

Isolated

ADC

TEDS

1
2

+
–

CHx

3

6

NI 9219

Filter

MUX

Current mode

HI

LO

ADC

I

R

SH

NI 9219

Voltage/Digital In modes

HI

LO

ADC

V

+
–

NI 9219

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