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OPERATING INSTRUCTIONS AND SPECIFICATIONS - page 10 / 24

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Protecting the Module from Flyback Voltages

If the module 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 as shown in Figure 4.

Flyback

Inductive

Diode

Device

+

External

Power

_

Supply

V

sup

DO

COM

NI 9476

Figure 4. Connecting a Flyback Diode to the NI 9476

NI 9476 Operating Instructions and Specifications

10

ni.com

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