Technical Product Specification

Power Subsystem Intel® Server System SR2600UR TPS
28 Intel order number E45274-011 Revision 1.8
3.11.6.4 Replacing a failed power supply
After replacing a failed power supply, the power subsystem will return to operating normally;
one power supply in active state, the other in cold standby state, powering on the cold standby
power supply once every week.
3.11.6.5 SMBAlert#
The cold redundant Power supply unit supports SMB Alert, while does not support ARA (Alert
Response Address)
3.11.7 Power Supply Control based on output load
The power distribution board shall turn on the cold standby power supply once the load is
higher than a given threshold. This threshold is defined by the efficiency curve of the power
supply. When the load is high enough that the efficiency of the active power supply starts
dropping at higher loads, the power distribution board shall activate the cold standby power
supply to maintain a higher efficiency.
The activation threshold of the cold standby power supply shall have a minimum hysteresis of
10% of the power supply’s rated output. The cold standby power supply shall power on/off at a
rate no more than 1 Hz (once per second) during any size, frequency, or duty cycle of transient
load condition.
Cold standby load hysteresis > 10% of PSU rating
Cold standby max cycle time < 1 / second
3.11.8 Backward Compatibility
The Cold Redundant power supply module (AXX750WPSCR) is backward compatible with the
750W non-cold redundant power supply module (AXX750WPS) and Power Distribution Board
(FSR26XXPDB).
In a mixed configuration (either non-cold redundant power supply module or the Power
Distribution Board), the cold redundancy functionality is not available. There is no special
Firmware requirement to use the Cold Redundant power supply module.
.
3.12 Power Supply Status LED
Each power supply module has a single bi-color LED to indicate power supply status. The LED
operation is defined in the following table.
Table 18. LED Indicators
Power Supply Condition
Bi-Color LED
No AC power to all power supplies
Off
No AC power to this PSU only (for 1+1 configuration)
or
Power supply critical event causing a shutdown:
failure, fuse blown (1+1 only), OCP, OVP, fan failed
Amber
Power supply warning events where the power supply continues to
operate: high temp, high power, high current, slow fan.
1 Hz Blink Amber