3. Input & CommunicationRS422An EIA serial digital interface standard that specifies the electrical characteristics of balanced (differential) voltage,digital interface circuits. This standard is usable over longer distances than RS-232. This signal governs the asyn-chronous transmission of computer data at speeds of up to 920,000 bits per second. It is also used as the serial portstandard for Macintosh computers. When the difference between the 2 lines is < - 0.2V that equals with a logical ’0’.When the difference is > +0.2V that equals to a logical ’1’..USB portThe communication interface is equipped with a master USB port, type “A” connector. This USB port will simplify the service pro-cedures for software updates or for taking backup files from the projector without network connection. An USB-stick is plugged intothe USB port and files can be transferred from or to the projector using the local or remote control unit. Note that the USB-stick hasto be Linux FAT16 compatible.3.4 LED and Button indication chartButton Backlight StatusButton Color status DescriptionBlinking WHITE (slow) Projector starts up (booting)Blinking WHITE (fast) Firmware upgradeSolid WHITE Projector is in Standby modeBlinking BLUE Projector goes to ON modeSolid BLUE Projector is ONStandby buttonBlinking RED Error conditionOff (no color) Projector is OFF, starts up, or is in Standbymode.Solid WHITE Projector is ON, shutter is openShutter buttonSolid RED Projector is ON, shutter is closedLED StatusLED Color status DescriptionOff Projector powers upRED Projector is in StandbyORANGE Projector is ReadyPWR (power LED)GREEN Projector is onOff Light source is offRED No light source detectedORANGE Light source is on in ECO modeGREEN Light source is on in normal modeLIGHT (Illumination LED)GREEN-ORANGE Light source is on in CLO modeR5906112 UDX SERIES 24/05/2017 23