xiB & xiB-64 - Technical Manual Version 1.06 473.9.4.3. Digital Input – Internal SchematicThe internal scheme of Digital Input signal flow inside the camera is below.figure 3-27, digital input, interface schematic3.9.4.4. Digital Input – Wiringfigure 3-28, digital input, interface wiringVCCD IG ITA L IN PU TI INPUTFPG A _IN PU TG N D ( Comm on I O Gr oun d)620R100R1 0K 4 9K 9GNDPLC DeviceInputCameraGND (Common IO Ground)CommonOutputPower Supply