HBM Machines HBM M3-M16 Plus Bedienungsanleitung Seite 21

16.1.2 Basic IO input terminal CN3
In1 for Tapping Signal(FOR), In2 for Return Signal(REV).
16.1.3 Touch screen communication interface RS232
CN4: 232Rx, 232Tx, GND, 5V
16.1.4 Power supply input interface CN1
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