Power Supply Failure; Alarm Reset - Supermicro X7DWN Plus User Manual

X7DWN+ User's Manual

Power Supply Failure

Connect a cable from your power
supply to the Power Supply Fail
header (PSF/JP3) to provide warnings
of power supply failure. This warning
signal is passed through the PWR_LED
pin to indicate a power failure on the
chassis. See the table on the right for
pin defi nitions.

Alarm Reset

If three power supplies are installed
and Alarm Reset (JAR) is enabled,
the system will notify you when any
of the three power modules fails.
Connect JAR to a micro-switch to
enable you to turn off the alarm that
is activated when a power module
fails. See the table on the right for
pin defi nitions.
DIMM 4D
Fan5
DIMM 4C
DIMM 4B
DIMM 4A
Fan6
DIMM 3D
DIMM 3C
DIMM 3B
DIMM 3A
DIMM 2D
DIMM 2C
DIMM 2B
DIMM 2A
Intel 5400
(North Bridge)
DIMM 1A
DIMM 1B
DIMM 1C
DIMM 1D
Slot6 PCI-E2 x8 SEPC
LAN
CTRL
Slot5 PCI-E2 x8
Slot4 PCI-E x4
S I/O
USB 4
Slot3 PCI-E x8 BIOS
JI2C1
JI2C2
Slot2 PCI-X 100/133MHz
JWOR
Slot1 PCI-X 100/133MHz
Slot0 PCI-U
Note: This feature is only available when using
Supermicro redundant power supplies.
CPU FAN1
24-Pin PWR 4-Pin PWR 8-Pin PWR
FAN7
A B
FAN1
JAR
3rd PWR Fail Detect
SMBUS_PS
CPU1
FAN2
CPU2
FAN3
FAN8
CPUFAN2
JWD
T-SGPIO2
CMOS Clear
Battery
T-SGPIO1
JWF1
JCF1
Intel ESB 2
(South Bridge)
VGA CTRL
FAN4
COM2
JL1 JK1
USB 2/3
JWOL
SMB
2-20
PWR Supply Failure
Pin Defi nitions
Pin# Defi nition
1 PWR 1: Fail
2 PWR 2: Fail
3 PWR 3: Fail
4 Signal: Alarm Reset
Alarm Reset
Pin Defi nitions
Pin Setting Defi nition
Pin 1 Ground
Pin 2 +5V
A. Power Supply Failure
B. Alarm Reset