
Chapter 5: Advanced Serverboard Setup
5-17
Overheat LED/Fan Fail
The JOH1 header is used to connect
an LED to provide warning of chassis
overheating. This LED will blink to in-
dicate a fan failure. Refer to the table
on right for pin defi nitions.
Overheat LED
Pin Defi nitions
Pin# Defi nition
1 5vDC
2 OH Active
OH/Fan Fail LED
States
State Message
Solid Overheat
Blinking Fan Fail
Power SMB (I2C)
The Power System Management
Bus (I
2
C) header (JPI
2
C) monitors
power supply, fan and system
temperatures. See the table on the
right for pin defi nitions.
Power SMB
Pin Defi nitions
Pin# Defi nition
1 Clock
2 Data
3 PWR Fail
4 Ground
5 +3.3V
IPMB
A System Management Bus header for
IPMI 2.0 is located at IPMB. Connect
the appropriate cable here to use the
IPMB I
2
C connection on your system.
IPMB Header
Pin Defi nitions
Pin# Defi nition
1 Data
2 Ground
3 Clock
4 No Connection
T-SGPIO 1/2 Headers
Two SGPIO (Serial-Link General
Purpose Input/Output) headers are
located on the motherboard. These
headers support Serial_Link inter-
faces for onboard SATA connections.
See the table on the right for pin
defi nitions.
T-SGPIO
Pin Defi nitions
Pin# Defi nition Pin Defi nition
1NC 2 NC
3 Ground 4 Data
5 Load 6 Ground
7 Clock 8 NC
NC = No Connection
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