5i25 P2 Connector for logic level I/O

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06 Oct 2016 20:25 - 06 Oct 2016 20:25 #81311 by B.Reilly01
My 7i77 is located in one control cabinet, and the 5i25 in the control panel(with the PC). I'm planning out the control panel, and was wondering if I can breakout the P2 connector on the 5i25 for simple input/output buttons/lights for the control panel instead of running an umbilical into the 7i77 just to transmit it back along the DB25 cable. Am I correct in thinking that IO17-33 could be used as logic level I/O by just connecting a ribbon cable to the P2 connector and splitting it out? What can the outputs sink? If I want more buttons, can I just breakout a parallel port too?
Last edit: 06 Oct 2016 20:25 by B.Reilly01.

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06 Oct 2016 20:29 #81313 by Todd Zuercher
Yes, yes, i don't know (have to look it up), and yes.
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06 Oct 2016 21:47 #81316 by PCW
Outputs can sink 24ma
If you have 5V referred loads (like LEDs) its best to use open drain mode
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