Com3/Com4 Ri Pin Setting (J11, J12) - Advantech PCM-5862E User Manual

The IRQ and the address range for COM1, 2, 3, 4 are fixed.
However, if you wish to disable the port or change these parameters
later you can do this in the system BIOS setup. The table below
shows the settings for the PCM-5862E/5862EL's serial ports.
PCM-5862E/5862EL serial port default settings
Port
COM1
COM2
COM3
COM4

COM3/COM4 RI pin setting (J11, J12)

The COM3 and COM4 can supply +5V or +12V power to the serial
devices via RI pin of the COM port connector. The outputs of
COM3, COM4 RI pins are selected by setting J11, J12.
COM3 RI pin setting
J12
COM4 RI pin setting
J11
* default setting
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PCM-5862E/EL User's Manual
Address Range
3F8~3FF
2F8~2FF
3E8~3EF
2E8~2EF
+5V
1 3 5
2 4 6
+5V
1 3 5
2 4 6
Interrupt
IRQ4
IRQ3
IRQ10
IRQ5
+12V
1 3 5
2 4 6
+12V
1 3 5
2 4 6
*RI
1 3 5
2 4 6
*RI
1 3 5
2 4 6