single serial screen only supports COM1 communication (RS232/RS485/RS422 communication);
dual serial screen supports COM1 communication (RS232/RS485/RS422 communication) and COM2 communication (RS232/RS485 optional)
Power supply: DC10-30V;
Backlight adjustment: Support ;
Touch: Support 4-wire resistive touch screen;
LCD resolution: 800X480;
USB1: Micro USB, download port;
USB2: TYPE-A, U disk port;
LCD: Normal view, 600cd/m2;
COM1 communication: RS422; RS232; RS485 communication
COM2 communication: RS232; RS485 communication (optional);
Storage: 128Mbyte SPI NAND FLASH;
Power supply: anti-reverse connection, distinguish between positive and negative power supply; with overvoltage protection, the voltage over 33V, automatic protection;
RTC clock: support;
Power down data saving: support;
Download: SD card download; USB download; U disk download.
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