User manual

25 ACP-2010MB User Manual
Chapter 4 Alarm Board
4.2 Alarm Board Specifications
! Input Power: +5 V, +12 V
! Input Signals:
– 7 "fan" connectors
– One "thermal sensor" connector (supports up to 8 thermal sensors connected
in a series)
– One "power good" input
– One "alarm reset" input
– One "voltage signal" connector (connected from the motherboard, and sup-
ports six voltages: +- 12 V, +- 5 V, +3.3 V, +5 Vsb)
– One "hard disk LED" connector (connected from the motherboard)
! Output Signals:
– One "LED board" connector
– One "buzzer" output
4.2.1 Connectors & Pin Definition
Table 4.1: CN1, Auxiliary external power connector, standard mini 4-Pin
power connector
Pin 1 +12 V Pin 3 GND
Pin 2 GND Pin 4 +5 V
Table 4.2: CN4, Thermal sensor (LM75) connector
Pin 1 +5 V Pin 3 T_SDAT
Pin 2 T_SCLK Pin 4 GND
Table 4.3: CN13, Voltage detect. input connector
Pin 1 +5 Vsb Pin 5 +5 V
Pin 2 GND Pin 6 +3.3 V
Pin 3 GND Pin 7 -12 V
Pin 4 -5 V Pin 8 +12 V
Table 4.4: CN16, Power good input connector
Pin 1 Power Good Pin 2 GND
Table 4.5: CN17, Alarm reset connector
Pin 1 ALARM RESET Pin 2 GND