National Instruments NI USB-6509 Computer Drive User Manual


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NI 6509 User Guide and Specifications 18 ni.com
Figure 14. NI USB-6509 Sourcing Connection Example, <24 mA
Driving a Relay >24 mA
Figures 15 and 16 are examples of connecting the NI USB-6509 to a relay
that requires more than 24 mA of current. These examples use an additional
transistor circuit.
Figure 15. NI USB-6509 Sinking Connection Example, >24 mA
Figure 16. NI USB-6509 Sourcing Connection Example, >24 mA
GND
NI USB-6509
PX.Y
GND
NI USB-6509
Vcc
PX.Y
GND
NI USB-6509
Vcc
PX.Y
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