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Chapter 4: Motherboard Connections
4-pin BMC External I
2
C Header
A System Management Bus header for IPMI 2.0 is located at JIPMB1. Connect a cable to this
header to use the IPMB I
2
C connection on your system. See the table below for pin definitions.
External I
2
C Header
Pin Definitions
Pin#
Definition
1
Data
2
Ground
3
Clock
4
No Connection
Power SMB (I
2
C) Header
Power System Management Bus (I
2
C) header at JPI
2
C1 monitors the power supply input/
output voltages, fans, temperatures, and status. Refer to the table below for pin definitions.
Power SMB Header
Pin Definitions
Pin#
Definition
1
Clock
2
Data
3
Power Fail
4
Ground
5
+3.3V
Chassis Intrusion
A Chassis Intrusion header is located at JL1 on the motherboard. Attach the appropriate cable
from the chassis to the header to inform you when the chassis is opened.
Chassis Intrusion
Pin Definitions
Pins
Definition
1
Intrusion Input
2
Ground
