Справочник Пользователя для Intel SERVER CHASSIS SR2500 SR2500

Intel® Server System SR2500AL Power 

AC line inrush current shall not exceed 40A peak for up to one-quarter of the AC cycle, after 
which, the input current should be no more than the specified maximum input current.  The peak 
inrush current shall be less than the ratings of its critical components (including input fuse, bulk 
rectifiers, and surge limiting device). 

The power supply must meet the inrush requirements for any rated AC voltage, during turn on at 
any phase of AC voltage, during a single cycle AC dropout condition as well as upon recovery 
after AC dropout of any duration, and over the specified temperature range (T

op

).  It is 

acceptable that AC line inrush current may reach up to 60A peak for up to 1 msec. 

Protection circuits inside the PDB and the power supply shall cause the power supply’s main 
+12V output to shut down, or shall cause a shut down of any of the three outputs on the PDB.  
Either of these shutdowns will result in shutting down the entire power supply / PDB 
combination.  If the power supply latches off due to a protection circuit tripping, an AC cycle 
OFF for 15 seconds shall be able to reset the power supply and the PDB. 

Each DC/DC converter output on the PDB shall have individual OCP protection circuits.  The 
power supply and power distribution board (PS and PDB) shall shutdown and latch off after an 
over-current condition occurs.  This latch shall be cleared by an AC power interruption.  The 
following table provides the over-current limits. The values are measured at the PDB harness 
connectors.  The DC/DC converters shall not be damaged from repeated power cycling in this 
condition.   The +12V output from the power supply is divided on the PDB into four channels 
and each is limited to 240VA of power.  There shall be current sensors and limit circuits to shut 
down the entire PS and PDB if the limit is exceeded.  The limits are listed below.   

+3.3V 

110% min (= 26.4A min) 

150% max (= 36A max) 

+5V 

110% min (= 33A min) 

150% max (= 45A max) 

-12V 

125% min (= 0.625A min) 

400% max (= 2.0A max) 

+12V1 

112.5% min (= 18.0A min) 

20A max  

+12V2 

112.5% min (= 18.0A min) 

20A max  

+12V3 

112.5% min (= 18.0A min) 

20A max  

+12V4 

112.5% min (= 18.0A min) 

20A max  

 

Each DC/DC converter output on the PDB shall have individual OVP circuits built in and they 
shall be locally sensed.  The PS and PDB shall shutdown and latch off after an over-voltage 
condition occurs.  This latch shall be cleared by an AC power interruption.  The following table 
provides the over-voltage limits. The values are measured at the PDB harness connectors.  The 
voltage shall never exceed the maximum levels when measured at the power pins of the output 
harness connector during any single point of fail.  The voltage shall never trip any lower than the 
minimum levels when measured at the power pins of the PDB connector.