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National Instruments Corp.
5
NI 9882 Operating Instructions
one or both COM pins. The port also has an optional shield pin,
SHLD, that you can connect to a shielded CAN 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 9882.
The NI 9882 requires an external power supply in the range of
+9 to +30 V to operate. Supply power to the NI 9882 V
SUP
pin.
Note
Power on V
SUP
is required for DeviceNET
operation.
The NI 9882 pinout is listed in Table 1.
The NI 9882 features software-selectable bus termination for
High-Speed CAN transceivers. On the NI 9882, you can enable
120
termination resistors between CAN_H and CAN_L through
an API call. Table 3 lists recommended termination resistor values.