Output State

When the NI-9470 powers on out of sleep, all DO+ channel outputs will be in the tristate condition with both high and low-side FET switches turned off. If you enable a channel before or after starting the software task, the DO+ output will drive low to COM. PWM output on DO+ channels will start after the software task has started.

Overcurrent fault, power supply fault, and overtemperature fault conditions will result in shutting down the channel, and the DO+ channel output will drive low to COM.

Note The NI-9470 will disable and tristate all DO+ channel outputs if the module goes to sleep or an imported external timebase is lost due to a master module being removed from the system.