Relay I/O Current

[Al Skierkiewicz]

Matt,
The TI device that drives the relay outputs is speced at 16ma max source/sink per output. The relay outputs then have a 680 resistor in series with the output and parallel feed another resistor and low current LED at about 5ma.

[Matt Krass]

Originally Posted by Al Skierkiewicz

Matt,
The TI device that drives the relay outputs is speced at 16ma max source/sink per output. The relay outputs then have a 680 resistor in series with the output and parallel feed another resistor and low current LED at about 5ma.

Sorry, badly phrased, I was referring to the DIO pins, not the relay outputs. I read your post as saying neither the DIO pins OR the Relay outputs were capable of driving an LED.

Sorry for any confusion,
Matt

[Al Skierkiewicz]

The digital I/O is 2ma as I remember. That spec is hard to find on the NI site.

[Matt Krass]

Not sure how that ended up working, I'm beginning to suspect that the 9403 module was actually just routing all of it's current output to one pin, but my lunch break is just about over so I'll have to dig through the spec sheets tonight to figure it out.

Apologies for any confusion I may have caused, thanks for the help,
Matt