Aaeon SBC-551 Manual page 43

The onboard IR connector supports an Infrared port module that
enables wireless communication between the computer and other
computers and devices with infrared capability. The port module is
an optional component. If it is installed, you must set the IR
Transfer Mode in the Peripherals section of the CMOS setup utility.
Pin
1
2
3
4
5
In single board computer without passive backplane applications,
you need to connect power directly to the SBC-551/552. This
connector is fully compatible with the standard PC power supply
connector. See the following table for its pin assignments:
Pin
1
2
3
4
Function
VCC
FIR_RX (High Frequency)
IR_RX (Low Frequency)
GND
IR_TX
Signal
+12V
GND
GND
+5V
Chapter 2 Installation 35