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Chapter 5: Advanced Serverboard Setup
5-15
Fan Headers
The PDSMU has six fan headers, des-
ignated Fan1 through Fan6. All are
4-pin fans to provide a Pulse Width
Modulated (PWM) signal, however
pins 1-3 of the headers are backward
compatible with traditional 3-pin fans.
Connect the CPU heatsink fan and
the system (chassis) fans to these
headers. Their speed is controlled via
Thermal Management with a BIOS
setting. See the tables on the right
for pin defi nitions.
Serial Ports
The COM1 serial port is located on
the IO backplane. COM2 is a header
on the serverboard (see serverboard
layout for location). See the table on
the right for pin defi nitions.
Note: Pin 10 is included on the header but not on
the port. NC indicates no connection.
Serial Port Pin Defi nitions
(COM1, COM2)
Pin # Defi nition Pin # Defi nition
1 DCD 6 DSR
2 RXD 7 RTS
3 TXD 8 CTS
4 DTR 9 RI
5 Ground 10 NC
Fan Header
Pin Defi nitions
(FAN1-6)
Pin# Defi nition
1 Ground (Black)
2 +12V (Red)
3 Tachometer
4 PWM Control
Universal Serial Bus
Headers
Four additional USB headers (USB2/3
and USB4/5) are included on the
serverboard. These may be used for
front side access. A USB cable (not
included) is needed for the connec-
tion. See the table on the right for
pin defi nitions.
Universal Serial Bus Headers
Pin Defi nitions (USB2/3, USB4/5)
USB2
Pin # Defi nition
USB3, USB4
Pin # Defi nition
1 +5V 1 +5V
2 PO- 2 PO-
3 PO+ 3 PO+
4 Ground 4 Ground
5 Key 5 NC
Note: When using Thermal Management set-
tings, please use all 3-pin fans or all 4-pin fans.
Please do not use both 3-pin fans and 4-pin fans
together.