Datasheet

Intel® Server System SR1550AL Power Sub-system
Revision – 1.3
Intel order number D31982-006
19
Output Voltage OVP MIN (V) OVP MAX (V)
+3.3V 3.9 4.5
+5V 5.7 6.2
+12V1,2, 3, 4 13.3 14.5
-12V -13.3 -14.5
+5VSB 5.7 6.5
2.8.3 Over Temperature Protection (OTP)
The PS+PDB will be protected against over-temperature conditions caused by loss of fan
cooling, excessive ambient temperature, or excessive loading. Two sensing points shall be
placed at hot spots; one near the exterior face and one near the interior face of the module. In
an OTP condition the PSU will shutdown. When the power supply temperature drops to within
specified limits, the power supply shall restore power automatically, while the 5 VSB remains
always on. The OTP circuit must have built in hysteresis such that the power supply will not
oscillate on and off due to temperature recovering condition. The OTP trip level shall have a
minimum of 4°C of ambient temperature hysteresis.
2.9 Power Supply Status LED
Each power supply module will have a single bi-color LED to indicate power supply status. The
LED operation is defined below.
Table 16. 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.
1Hz Blink AMBER
AC present / Only 5VSB on (PS Off)
1Hz Blink GREEN
Output ON and OK
GREEN
The LED is visible on the rear panel of each installed power supply module.