© 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 Specifications 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
123456
Vol t a g e 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 —