MSI 5520 Master Series, User Manual, Page: 23 / 82

2-11
Hardware Setup
Fan Power Connector: FAN1, FAN2, FAN3, FAN4
The fan power connectors support system cooling fan with +12V. W hen connecting
the wire to the connectors, always note that the red wire is the positive and should
be connected to the +12V; the black wire is Ground and should be connected to GND.
If the mainboard has a System Hardware Monitor chipset onboard, you must use a
specially designed fan with speed sensor to take advantage of the CPU fan control.
Important
Please refer to the recommended CPU fans at processor ’ s official website or
consult the vendors for proper CPU cooling fan.
Serial Port Connector: COM2
This connector is a 16550A high speed communications port that sends/receives 16
bytes FIFOs. You can attach a serial device to it through the optional serial port
bracket.
PIN SIGNAL DESCRIPTION
1 DCD Data Carry Detect
2 SIN Serial In or Receive Data
3 SOUT Serial Out or Transmit Data
4 DTR Data Terminal Ready
5 GND Ground
6 DSR Data Set Ready
7 RTS Request To Send
8 CTS Clear To Send
9 VCC_COM Power Source
Pin Definition
PIN SIGNAL
5 GND
6 FAN2-TECH
7 +12V
8 FAN12-PWM
PIN SIGNAL
1 FAN12-PWM
2 +12V
3 FAN1-TECH
4 GND
Pin Definition
COM2
1
9
2
FAN4
1
FAN1,
FAN2,
FAN3
1
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