Protecting the Digital Outputs from Flyback Voltages
If the channel is switching an inductive or energy-storing device such as a solenoid,
motor, or relay, and the device does not have flyback protection, install an external
flyback diode.
Figure 2. Connecting a Flyback Diode
NI 9375
External
Power
Supply
+
–
DO COM
V
sup
Inductive
Device
DO
Flyback
Diode
Connecting to a Spring-Terminal Connector
What to Use
■
NI 9375 spring-terminal connector
■
0.08 mm
2
to 1.0 mm
2
(28 AWG to 18 AWG) copper conductor wire with 7 mm
(0.28 in.) of insulation stripped from the end
■
Flathead screwdriver with a 2.3 mm x 1.0 mm (0.09 in. x 0.04 in.) blade,
included with the NI 9375
What to Do
Complete the following steps to connect wires to the spring-terminal connector.
1
2
3
© National Instruments
9
NI-9375 Getting Started
