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  1. PeterLG

    LG LS PLC proximity inputs, PNP or NPN?

    I have been given the task to buy an LG PLC (K120s)20 to 40 I/O, I need to input some proximity switches, do I use PNP or NPN, I want to use the inbuilt 200ma 24v power supply, I'm getting old and have forgotten all I knew about transistors as I haven't done a lot with them, I can plod my way...

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