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National Instruments Corporation
11
NI USB-9219 User Guide and Specifications
Connecting Wires to the NI USB-9219 Connectors
Use a flathead screwdriver with a blade smaller than 2.3 × 1.0 mm (0.09 ×
0.04 in.) to connect wires to the detachable spring-terminal connectors.
Insert the screwdriver into a spring clamp activation slot and press a wire
into the corresponding connector terminal, then remove the screwdriver to
clamp the wire into the terminal. Refer to the
section for
more information about spring-terminal wiring. Refer to Figure 7 for an
illustration of connecting wires to the NI USB-9219.
Figure 7.
Connecting Wires to the NI USB-9219 Connectors
Table 4.
Terminal Assignments
Mode
Terminal
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
Digital In
T+
T
–
—
HI
LO
—
Open Contact
T+
T
–
HI
—
LO
—