Auxiliary I C Connector (J9E4); Auxiliary I 2 C Connector (J9E4); Baseboard Fan Connectors (J3C1, J3A1, J4A1, J4C1); Table A-29 Icmb Connector (J1D2) - Silicon Graphics 1450 Maintenance Manual

A: Technical Reference
Auxiliary I 2 C Connector (J9E4)

Baseboard Fan Connectors (J3C1, J3A1, J4A1, J4C1)

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provides a mechanism for chassis power control. As an option, you can configure a
server with an ICMB adapter board to provide two SEMCONN 6-pin connectors for
daisy-chained cabling. Table A-29 shows the cable pinout assignments for the ICMB
connector.
Table A-29 ICMB Connector (J1D2)
Pin Signal Type
1 SDA signal
2 Ground power
3 SCL signal
4 5 V standby power
The baseboard provides a 3-pin auxiliary I
connector is not isolated when power is off. Any devices connected must remain
powered in this state or the BMC will not work properly.
A shorted I 2 C connection at the auxiliary I
power because the BMC needs the bus to boot the server from standby power. Table A-30
shows the cable pinout assignments for the IMB connector.
Table A-30 IMB Connector (J8F1)
Pin Signal
1 Local I 2 C SDA
2 GROUND
3 Local I 2 C SCL
There are four fan connectors located on the baseboard. Use these connectors are for
additional processor cooling.
Description
IPMB I2C Data
IPMB I2C Clock
2 C connector for OEM access to the IPMB. This
2 C connector will prevent restoration of main
Description
BMC IMB 5VSTNDBY clock line
BMC IMB 5VSTNDBY data line
007-4276-001