Справочник Пользователя для National Instruments NI 9476

© National Instruments Corp.

The NI 9476 is protected against overcurrent, inrush, and 
short-circuit conditions in accordance with IEC 1131-2.

Each channel on the NI 9476 has circuitry that protects it from 
voltage and current surges resulting from short circuits.

The NI 9476 can be damaged under overvoltage 

and reverse bias voltage conditions. Check the voltage 
specifications for all devices that you connect to the 
NI 9476.

Excessive current through a DO pin causes the channel to go into 
an overcurrent state. In an overcurrent state, the channel cycles off 
and on until the short circuit is removed or the current returns to an 
acceptably low level. Refer the 

 section for typical 

trip currents.

Each channel has a status line that indicates in software whether the 
channel is in an overcurrent state. Refer to the software help for 
information about reading output status.