R2000GZ and R2000GL

Intel
®
Server System R2000GZ/GL Product Family TPS
3.7.1 DC Input Voltage
The power supply must operate within all specified limits over the following input voltage range.
Table 19. DC Input Rating
PARAMETER
MIN
RATED
MAX
DC Voltage
-40.5 VDC
-48VDC/-60VDC
-75VDC
Input Current
24A
12.5A
3.7.2 DC Input Fuse
The power supply shall have the –48VDC input fused. The fusing shall be acceptable for all safety agency
requirements. DC inrush current shall not cause the fuse to blow under any conditions. No protection circuits
in the power supply shall cause the DC fuse to blow unless a component in the power supply has failed. This
includes DC output load short conditions.
3.7.3 DC Inrush Current
Maximum inrush current from power-on shall be limited to a level below the surge rating of the input line cable;
input diodes, fuse, and EMI filter components. To allow multiple power cycling events and DC line transient
conditions max I²t value shall not exceed 20% of the fuse max rating. Repetitive ON/OFF cycling of the DC
input line voltage should not damage the power supply or cause the input fuse to blow.
3.7.4 DC Input Under Voltage
The power supply shall contain protection circuitry (under-voltage lock-out) such that the application of an input
voltage below the specified minimum specified, shall not cause damage (overstress) to the power supply unit
(due to over-heating or otherwise).
3.7.5 DC Holdup Time and Dropout
Loading
Holdup time
750W (100%)
0.2msec
During a DC dropout of 0.2ms or less the power supply must meet dynamic voltage regulation requirements
for every rated load condition. A DC line dropout of 0.2ms or less shall not cause tripping of control signals or
protection circuits. Repeated every 10 seconds starting at the min input voltage DC line dropout shall not
damage the power supply under any specified load conditions. The PWOK signal shall not go to a low state
under these conditions. DC dropout transients in excess of 0.2 milliseconds may cause shutdown of the PS
or out of regulation conditions, but shall not damage the power supply. The power supply should recover and
meet all turn on requirements for DC dropouts that last longer than 0.2ms. The power supply must meet the
DC dropout requirement over rated DC voltages and output loading conditions.
3.7.6 DC Line Surge Voltages (Line Transients)
The Power Supply should demonstrate tolerance for transients in the input DC power line caused by switching
or lightning. The power supply shall be primarily tested and must be compliant with the requirements of
EN61000-4-5: “Electrical Fast transients / Burst Requirements and Surge Immunity Requirements” for surge
withstand capability. The test voltage surge levels are to be: 500Vpk for each Line to Primary Earth Ground
test (none required between the L1 and L2). The exact description can be found in Intel Environmental
Standards Handbook 2001.
26 Revision 2.2