User`s manual

27 Chapter 3 Alarm Board
3.2 Alarm board Specification
Input Power:
+5V, +12V Input Signals:
• 7 FAN connectors (Pin 1: GND, Pin 2: +12V, Pin 3: FAN Signal)
• One thermal board connector (it can connect up to 8 thermal
boards in a roll)
• One power good input
• One alarm reset input.
• One voltage signal connector (connect from back plane, includes
±12V, ±5V, 3.3V)
• One ATX power connector (connect from CPU card)
• One system reset connector (connect from CPU card)
• One Hard Disk LED connector (connect from CPU card)
Output Signals:
• One LED board connector
• One LCM board connector
• SNMP daughter board connector (connect to SNMP-1000
main board)
• One Buzzer output
• ATX power connector (connect to chassis)
• System reset connector (connect to chassis)
Other Interfaces:
• One pair of Watch dog input/output signals
• One pair of I2C Bus signals (DATA and CLK)
• One LAN connector
• One COM connector
• One Battery pack connector
Pin Definition
CN1 : External Power Connector, standard mini 4 Pin power connector
Pin 1 : +12V, 2A current maximumPin 2 : GND
Pin 3 : GND Pin 4 : +5V, 2A current maximum