The com module is purchased separately, Imbm-h61a serial port connectors, Imba-h61a dio connector – AAEON IMBA-H61A User Manual
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Chapter 2: Motherboard information
9. Serial port connectors (10-1 pin COM1/2, COM3~6)
These connectors are for serial (COM) ports. Connect the serial port module
cable to this connector, then install the module to a slot opening at the back
of the system chassis.
The COM module is purchased separately.
IMBM-H61A Serial port connectors
PIN 1
COMBH2
RI
RTS
GND
TXD
DCD
CTS
DSR
DTR
RXD
PIN 1
COM4
RI
RTS
GND
TXD
DCD
CTS
DSR
DTR
RXD
PIN 1
COM5
RI
RTS
GND
TXD
DCD
CTS
DSR
DTR
RXD
PIN 1
COM6
RI
RTS
GND
TXD
DCD
CTS
DSR
DTR
RXD
PIN 1
COM3
RI
RTS
GND
TXD
DCD
CTS
DSR
DTR
RXD
IMBA-H61A DIO connector
PIN 1
DIO1
GPIO50(DIO_P#1)
GPIO53 (DIO_P#3)
GPIO55 (DIO_P#5)
GPIO57(DIO_P#7)
+5V
GPIO51 (DIO_P#2)
GPIO54(DIO_P#4)
GPIO56(DIO_P#6)
GPIO58 (DIO_P#8)
GND
10. Digital I/O connector (10-pin DIO1)
This connector includes 8 I/O lines. All of the Digital I/O lines are
programmable and each I/O pin can be individually programmed to support
various devices.