Supermicro 4020A-8R, User Manual

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A+ Server 4020A-8R User's Manual
Fan Headers
The H8DAR has eight headers (FAN1-
FAN8). Fan speed is controlled via
Thermal Management with a BIOS
setting. See the table on the right for
pin defi nitions.
Serial Ports
The COM1 serial port is located be-
side the VGA port. COM2 is a header
on the serverboard located near the
BIOS chip (see serverboard layout for
location). See the table on the right
for pin defi nitions.
JLAN1/2 (Ethernet Ports)
Two Gigabit Ethernet ports (desig-
nated JLAN1 and JLAN2) are located
beside the VGA port. These ports
accept RJ45 type cables.
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 CD 6 DSR
2 RD 7 RTS
3 TD 8 CTS
4 DTR 9 RI
5 Ground 10 NC
Fan Header
Pin Defi nitions
(FAN1-8)
Pin# Defi nition
1 Ground (Black)
2 +12V (Red)
3 Tachometer
4 PWM Control
Power Fail and Alarm Reset
Header
Connect a cable from your power sup-
ply to the JP10 header to provide you
with warning of a power supply failure.
The warning signal is passed through
the PWR_LED pin to indicate a power
failure. See the table on the right for
pin defi nitions.
Power Fail/Alarm Reset
Header
Pin Defi nitions (JP10)
Pin# Defi nition
1 P/S 1 Fail Signal
2 P/S 2 Fail Signal
3 P/S 3 Fail Signal
4 Reset (from MB)
Note: This feature is only available when using
redundant power supplies.