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National Instruments Corp.
7
NI 9403E Operating Instructions and Specifications
Overcurrent/Short-Circuit Protection
The overcurrent protection allows only a specified amount of
current through the output channels to protect the NI 9403E from
short circuits. If the NI 9403E goes into an overcurrent state, the
module sets all the DIO channels to high impedance for
approximately 280 milliseconds. When the channels are in this
state, the NI 9403E can accept new line direction configuration and
output state data but cannot pass valid input data to the software.
After the protection period, the NI 9403E automatically recovers to
the latest direction configuration and output state. If the
overcurrent condition still exists, the module again sets the
channels to high impedance. This cycle continues until the
overcurrent condition is removed. Refer to the
section for more information about the maximum output current.
Sleep Mode
This module supports a low-power sleep mode. Support for sleep
mode at the system level depends on the chassis that the module is
plugged into. Refer to the chassis manual for information about
support for sleep mode. If the chassis supports sleep mode, refer to
the software help for information about enabling sleep mode. Visit
