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94 SKA4 Baseboard Product Guide
Table 50. Auxiliary Power Connector (J9B2) (continued)
Pin Signal Type*
Current Carrying
Capability Description
9 PS PWR ON_L out N/A Control signal from baseboard to power
supply
10 Ground ground Ground return connection
11 -12V power Power Supply negative 12V
12 Key N/A
13 12V power Power Supply 12V
14 Ground ground Ground return connection
* Type (in, out, in/out, power, ground) is from the perspective of the baseboard.
Front Panel Interface (J9E3)
The front panel attaches to a 30-pin header on the baseboard. The header contains reset, NMI,
sleep, and power control buttons, LED indicators, and an IPMB connection. The table below
summarizes the front panel signal pins, including the signal mnemonic, name, and brief
description.
Table 51. Front Panel Connector (J9E3)
Pin Signal Type* Description
1 SPKR_FP out SPEAKER DATA for the front panel/chassis mounted
speaker.
2 GROUND ground GROUND is the power supply ground.
3 CHASSIS_INTRUSION in CHASSIS INTRUSION is connected to the BMC and
indicates that the chassis has been opened.
CHASSIS_INTRUSION is pulled high to +5 V standby on the
baseboard.
4 FP_HD_ACT* out HARD DRIVE ACTIVITY indicates there is activity on one of
the hard disk controllers in the system.
5 +5V power +5 V is the 5 volt power supply.
6 FP_SLP_BTN* in FRONT PANEL SLEEP is connected to the BMC and causes
the system to be put to sleep if supported by the operating
system.
FP_SLP_BTN* is pulled high to +5 V on the
baseboard and is intended to be connected to a momentary-
contact push button (connected to GROUND when pushed)
on the system front.
7 COOL_FLT_LED* out COOLING FAULT LED indicates that either a fan failure has
occurred or the system is approaching an over-temperature
situation.
COOL_FLT_LED* is an output of the BMC.
8 PWR_LED* out POWER PRESENT LED.
9 PWR_FLT_LED* out SYSTEM FAULT indicates that either a power fault or SCSI
drive failure has occurred in the system.
10 GROUND ground GROUND is the power supply ground.
11 SM_IMB_SDA in/out I
2
C DATA is the data signal for the Intelligent Platform
Management Bus.
continued