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Chapter 4: Motherboard Connections
Power SMB (I
2
C) Header
The Power System Management Bus (I
2
C) connector (JPI
2
C1) monitors the power supply,
fan, and system temperatures. Refer to the table below for pin definitions.
Power SMB Header
Pin Definitions
Pin#
Definition
1
Clock
2
Data
3
PMBUS_Alert
4
Ground
5
+3.3V
4-pin BMC External I
2
C Header
A System Management Bus header for BMC is located at JIPMB1. Connect the appropriate
cable here to use the IPMB I
2
C connection on your system. Refer to the table below for pin
definitions.
External I
2
C Header
Pin Definitions
Pin#
Definition
1
Data
2
Ground
3
Clock
4
No Connection
Chassis Intrusion
A Chassis Intrusion header is located at JL1 on the motherboard. Attach the appropriate
cable from the chassis to inform you when the chassis is opened. Refer to the table below
for pin definitions.
Chassis Intrusion
Pin Definitions
Pin#
Definition
1
Intrusion Input
2
Ground
