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National Instruments
5
NI 9866 Operating Instructions
Wiring the NI 9866
The NI 9866 has one 9-pin male D-Sub connector that provides
connections to a LIN bus.
The port has two common pins (COM) that are internally
connected to the module’s isolated reference and serve as the
reference ground for LIN signal. You can connect the LIN bus
reference ground to one or both COM pins. The port also has an
optional shield pin, SHLD, that you can connect to a shielded LIN
cable. Connecting SHLD may improve signal integrity and EMC
performance in a noisy environment.
Caution
You must use a UL listed ITE power supply
marked LPS with the NI 9866.
The NI 9866 requires an external power supply of +8 to +18 V to
operate. Supply power to the NI 9866 V
SUP
pin from the LIN bus.
Note
Power on V
SUP
is required for LIN operation.
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