Fan Headers (Fan 1 ~ Fan 3); Chassis Intrusion (Jl1) - Supermicro SuperO A1SAM-2750F User Manual

A1SAM/A1SRM Series Motherboard User's Manual

Fan Headers (Fan 1 ~ Fan 3)

This motherboard has three fan headers (Fan
1~Fan 3). These fans are 4-pin fan headers. Al-
though pins 1-3 of the fan headers are backward
compatible with the traditional 3-pin fans, we
recommend that 4-pin fans to be used to take
advantage of fan speed control via Pulse Width
Modulation through the BMC. This allows the
fan speeds to be automatically adjusted based
on the motherboard temperature. Refer to the
table on the right for pin definitions.

Chassis Intrusion (JL1)

A Chassis Intrusion header is located at JL1 on
the motherboard. Attach the appropriate cable
from the chassis to inform you of a chassis intru-
sion when the chassis is opened.
JBAT1
JF1
BATTERY
SP1
C
BUZZER
D
COM2
USB4/5
LAN2/LAN4
LAN1/LAN3
JUIDB1
JVGA1
BMC
JLAN2 JLAN1
LAN3/4 LED
PHY
A1SAM/A1SRM Series
Rev. 1.01
BIOS
SoC Processor
JBT1
1
USB0/1
USB 2/3
COM1
IPMI_LAN
PWRI2C
B
A
2-20
Fan Header
Pin Definitions
Pin# Definition
1 Ground (Black)
2 2.5A/+12V
(Red)
3 Tachometer
4 PWM_Control
Chassis Intrusion
Pin Definitions (JL1)
Pin# Definition
1 Intrusion Input
2 Ground
A. Fan 1
B. Fan 2
C. Fan 3
D. Chassis Intrusion