© National Instruments Corporation 11 NI USB-9237 User Guide and Specifications
Figure 6. Four Position External Excitation Voltage Source Connection
Connecting Loads to the NI USB-9237

Refer to Figure 7 for an illustration of how to connect full and half bridges

to the NI USB-9237.

Figure 7. Half- and Full-Bridge Connections
Note You can use a quarter bridge with the NI USB-9237 if you either add a resistor

externally to create a half bridge or use the NI 9944 or NI 9945 Quarter Bridge Completion

Accessory. Visit ni.com and search for the NI 9944 and/or NI 9945 Quarter Bridge

1EX– 2 EX+ 3EX+ 4 EX–
1 The dotted line indicates that the full
bridge is optional while the half bridge
is required.
2 These four signals are the only
signals that must be connected.
2
1
4
3
EX+
EX–
SC
SC
RS+
RS–
T+
T–
AI–*
AI+
TEDS
When you connect a half bridge
to the NI USB-9237, the AI– signal is
not connected.

*

2
1