User manual

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4.2 Alarm board specifications
Input Power: +5V, +12V
Input Signals:
• 7 fan connectors
• One thermal sensor connector (connects up to 8 thermal sensors in
series)
• One Power Good connector
• One alarm reset connector
• One voltage signal connector (connect from the backplane / mother-
board, supporting six voltages: +-12 V, +-5 V, +3.3 V and +5 Vsb)
• One HDD LED connector (connect from the CPU card/motherboard)
Output Signals:
• One LED board connector
• One Buzzer output
4.2.1 Connectors, Jumper and Pin Definition
Table 4.1: Summary of the connectors , jumper and pin defini-
tion
CN1: External power connector, standard mini 4-pin
power connector
Pin 1 +12V @ 2A max. Pin 2 GND
Pin 3 GND Pin 4 +5V @ 2A max
CN4: Thermal sensor (LM75) connector
Pin 1 +5V Pin 2 T_SCLK
Pin 3 T_SDAT Pin 4 GND
CN13: Voltage detection input connector
Pin 1 5VSB Pin 2 GND
Pin 3 GND Pin 4 -5V
Pin 5 +5V Pin 6 +3.3V
Pin 7 -12V Pin 8 +12V
CN16: Power Good input connector
Pin 1 Power Good A Pin 2 GND