Going throuogh the schematics for my CHNC the limit switches and the home switch have three terminals PLUS MINUS and ZERO. Are these voltage or polarity dependent or are they simple switches? Also the turret encoder shows an A B C and D outputs. Are these binary or BCD and why 4 lines when 3 would be enough for 8 positions? What voltage to this encoder? Probably more questions later as I dig into it. Thanks. Ed.
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