2.
Serial port connector (10-1 pin COM1)
N3150I-C / N3050I-C Serial port connector
3.
CPU and chassis fan connectors (4-pin CPU_FAN, 4-pin CHA_FAN)
black wire of each cable matches the ground pin of the connector.
N3150I-C / N3050I-C Fan connectors
1-12
COM2
CTS
DSR
DTR
RXD
CPU_FAN
CHA_FAN
RI
RTS
GND
TXD
DCD
PIN 1
Chapter 1: Product introduction