Smbus Monitoring Interface; Table 70. Led Indicators - Intel SC5299BRP Technical Product Specification

®
Intel Entry Server Chassis SC5299-E TPS
2.3.5.4 LEDs
There is a bi-color LED and a single color LED to indicate power supply status. The LED
operation is defined in the following table.
Power Supply Condition
AC Power Off
AC power on in Standby
AC On and All Outputs in Normal
Any DC Outputs Short Circuit
DC Fan Not Spinning
OTP
The LEDs are visible on the power supply's exterior face. The LEDs' location meets
Electrostatic Discharge (ESD) requirements. LEDs are securely mounted in such a way that
incidental pressure on the LEDs does not cause them to be displaced.
There are bits that allow the LED states to be forced via the SMBus. The following capabilities
are required:
Force Amber ON for failure conditions.
No Force (LED state follows power supply present state)
The power-on default is 'No Force'. The default is restored whenever PSON transitions to
assert.
2.3.6

SMBus Monitoring Interface

The power supply and cage combination provides a monitoring interface to the system over a
server management bus. The device in the power supply is compatible with SMBus 2.0 'high
power' specification for I
3.3V but will tolerate 5V signaling.
One pin is used for the Serial Clock [SCL] (PSM Clock). The second pin is used for Serial Data
[SDA] (PSM Data). Both pins are bi-directional, open drain signals, and are used to form a serial
bus. For redundant power supplies, the device(s) in the power supply are located at an
address(s) determined by address pins A0 and A1. The circuits inside the power supply derive
their power from the standby output. For redundant power supplies, the device(s) are powered
from the system side of the or'ing device.
Revision 3.1

Table 70. LED Indicators

Status LED
(AC OK/Power Supply Fail)
OFF
Green
Green
Green
Amber
Amber
2
C V based power and drive (for V
dd
Intel order number D37594-005
Power Sub-system
Power Led
(Power Good)
OFF
OFF
Green
Power Distribution
OFF Board protection only;
OFF Module protection only
Green Send out alert signal
= 3.3 V). This bus operates at
dd
Remarks
module OK
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