Advantech AIMB-286EF User Manual page 64

Smart Fan Mode Configuration
 CPU FAN Mode [SMART FAN IV Mode]
The item shows you CPU temperature and fan speed (PWM) information
 SYSFAN Mode [SMART FAN IV Mode]
The item shows you system temperature and fan speed (PWM) information
Serial Port 3 Configuration
 Serial Port [Enabled]
Device Settings: IO=240h; IRQ =5
Change Setting [Auto]

To select an optimal setting for serial port 2
 RS-485 Auto Flow Control Function [Disable ]
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