Max output current

[wbirnie13@gmail.com]

I would like to drive a LED with output 4. My LED has a max 20 mA rating. If I configure the resistor to allow close to this will the output be OK with this current.

[wbirnie13@gmail.com]

I was thinking since I'm using a smoothstepper the max current for the output would be determined by the smoothstepper (32 mA). Would this be
the case?

[12strings]

I presume since you are posting on the PMDX forums that you are connecting a PMDX board to the SmoothStepper.  If so - which PMDX board?  If you look at the end of your PMDX users manual there is an electrical specs section.  Look for the "outputs" or "control outputs" lines.  That will tell you the max current that the boards can handle.  For example, the PMDX-126 can source or sink 16mA.

If you are connecting the LED directly to the SmoothStepper, then you need to ask the SS people.

[wbirnie13@gmail.com]

Sorry I didn't mention I was using a PMDX-126. I also didn't realize the 126 was buffering the output. So 16 mA it is. Thanks for the reply.