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#2
12-12-2007, 07:33 AM
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| I think you are refering to PNP or NPN which relates to either sink or source, IOW you can have a input device that sources (PNP) that switches the positive rail into a sinking input. Or with NPN, vice-versa, switches to the common or - rail into a source type input. By input, I am refering to a PLC type input card. P.S. turn your caps off, it is equivalent of shouting. Al.
__________________ CNC, Mechatronics Integration and Machine Design. “Logic will get you from A to B. Imagination will take you everywhere.” Albert E.  |
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