National Instruments NI 9219 - Manual (Page 13)

© National Instruments Corp. 13 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