Table A-31 Processor Fan Connector #1 (J3C1); Table A-32 Processor Fan Connector #2 (J3A1) - Silicon Graphics 1450 Maintenance Manual

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The baseboard only supports monitoring a total of eight tachometer fan inputs. The front
panel connector provides connections to all eight tachometer fan inputs. The tachometer
signals from these four processor fan connectors are connected to the same tachometer
fan signals FAN_TACH(4), FAN_TACH(5), FAN_TACH(6), and FAN_TACH(7)
provided on the front panel connector J9E3. Therefore, make sure that only one
connection is used at any given time.
Note: The type of connector (in, out, in/out, power, ground) indicated in the following
tables is described from the perspective of the baseboard.
Table A-31 describes the processor fan connector #1 (J3C1).
Table A-31 Processor Fan Connector #1 (J3C1)
Pin Signal Type
1 Ground power
2 12V power
3 Fan Tach Out
Table A-32 describes the processor fan connector #2 (J3A1).
Processor Fan Connector #2 (J3A1)
Table A-32
Pin Signal Type
1 Ground power
2 12V power
3 Fan Tach Out
Description
GROUND is the power supply ground
Power supply 12 V
FAN_TACH signal is connected to the BMC to monitor the
FAN speed
Description
GROUND is the power supply ground
Power supply 12 V
FAN_TACH signal is connected to the BMC to monitor the
FAN speed
Baseboard Connectors
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