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Supermicro SC747 Chassis User's Manual
D.11 SATA-M35 Front Jumpers and Pin Definitions
JP28
JP18
JP25
Figure D-2. SATA-M35 Front Jumpers
SATA-M35 Front Jumper Settings
Jumper
Jumper Settings
Note
JP18
Open (jumper off): Buzzer enabled
Closed (jumper on): Buzzer disabled
Buzzer reset*
JP28
Pins 1-2: Fan enabled
Pins 2-3: Fan disabled
Fan jumper
JP25
Open (jumper off): 45ºC
1-2: 50ºC
2-3: 55ºC
Overheat temperature settings.
Buzzer activated at the
temperature indicated.
*The buzzer sound indicates that a condition requiring immediate attention has occurred.
The buzzer alarm is triggered by the following conditions:
1. Hard drive failure
2. Fan failure
3. System temperature over 45º, 50º or 55º Celsius.
Explanation of Jumpers
To modify the operation of the mobile rack, jumpers can be
used to choose between optional settings. Jumpers create
shorts between two pins to change the function of the
connector. Pin 1 is identified with a square solder pad on
the printed circuit board. Note: On two pin jumpers, "Closed"
means the jumper is on and "Open" means the jumper is
off the pins.
Connector
Pins
Jumper
Setting
3 2 1
3 2 1