main features
-AMD-80188-40MHz low-power CPU
-Built in RTC SRAM、Flash Disk、miniBIOS、ROM DOS、 Watch dog, automatic commutation circuit, 7-segment LED display, extended I/O bus, etc
-4-8 serial ports, with COM1 being a 5-wire RS-232 or 2-wire RS-485 port
-Working temperature:- 25~70℃
-Power supply:+ 10~30VDC/2.0W