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NI 6509 User Guide and Specifications
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Figure 5. NI 6509 Signal Connections
Protecting Inductive Loads
When inductive loads are connected to outputs, a large
counter-electromotive force may occur at switching time because of the
energy stored in the inductive load. These flyback voltages can damage
the outputs and/or the power supply.
counter-electromotive force may occur at switching time because of the
energy stored in the inductive load. These flyback voltages can damage
the outputs and/or the power supply.
To limit these flyback voltages at the inductive load, install a flyback diode
across the inductive load. For best results, mount the flyback diode within
18 inches of the load. Figure 6 shows an example of using an external
flyback diode to protect inductive loads.
across the inductive load. For best results, mount the flyback diode within
18 inches of the load. Figure 6 shows an example of using an external
flyback diode to protect inductive loads.
41
43
45
47
67
69
71
73
50, 100
NI 6509
+5 V
+5 V
LED
Port 7
P7<7..4>
Port 0
P0<3..0>
GND
TTL Signal