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NI 9219 Pinout
CH0
CH1
CH2
CH3
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
Mode
Pin
1
2
3
4
5
6
Voltage
T+
T-
—
HI
LO
—
Current
T+
T-
HI
—
LO
—
4-Wire Resistance
T+
T-
EX+
HI
EX-
LO
2-Wire Resistance
T+
T-
HI
—
LO
—
Thermocouple
T+
T-
—
HI
LO
—
4-Wire RTD
T+
T-
EX+
HI
EX-
LO
3-Wire RTD
T+
T-
EX+
—
EX-
LO
Quarter-Bridge
T+
T-
HI
—
LO
—
Half-Bridge
T+
T-
EX+
HI
EX-
—
Full-Bridge
T+
T-
EX+
HI
EX-
LO
DI
T+
T-
—
HI
LO
—
Open Contact
T+
T-
HI
—
LO
—
Table 1. Signals by Mode
Signal
Description
EX+
Positive sensor excitation connection
© National Instruments
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NI-9219 Getting Started