ML100G-51/52 Industrial Computer
15
3.3 - Onboard Headers
An onboard header is a connection on the motherboard that permits connecting a peripheral component to
an external port on the system.
USB2_3_4
The USB2_3_4 connector supports two USB ports.
COM1
The motherboard includes an I/O COM Port at 0x3F8 IRQ4 and can support RS232/RS422/RS485.
RS232
RS422
RS485
1
DCD
TX (negative)
RTX (negative)
2
RXD#
TX (positive)
RTX (positive)
3
TXD#
RX (positive)
N/A
4
DTR
RX (negative)
N/A
5
GND
GND
GND
6
DSR
N/A
N/A
7
RTS
N/A
N/A
8
CTS
N/A
N/A
9
RI
N/A
N/A
10
Key
N/A
N/A
1
5V_USB
3
Data (Negative)
5
Data (Positive)
7
GND
9
NC
2
5V_USB
4
Data (Negative)
6
Data (Positive)
8
GND
10
Key
