Technical Product Specification

Intel® Server System SR2625UR TPS Power Subsystem
Revision 1.8 Intel order number E46130-010
29
Figure 16. Cold Redundant Power Supply Module
3.11.2 Signals
System signals shall operate the same with a cold redundant power subsystem as a standard
redundant power subsystem.
3.11.2.1 System PWOK Signal
The power distribution board shall provide the standard PWOK signal to the system (SYS-
PWOK). SYS-PWOK shall meet all the standard turn on and turn off timing requirements.
o The SYS-PWOK signal shall stay asserted during any failure of an active or cold standby
power supply.
o With a single power supply installed in the system; the 1msec advanced warning timing
shall be met during a loss of AC voltage
o With more than one power supply installed; the 1msec advanced warning timing shall be
met during a loss of AC voltage
o SYS-PWOK shall meet the characteristic requirements of PWOK
3.11.2.2 PSON# Signals
The power distribution board shall receive as an input from the system SYS-PSON#. The power
distribution board shall control the separate enable signals to each module; PSON1#, PSON2#.
o SYS-PSON# shall meet the characteristic requirements of PSON#
o If a power supply fails, keep its PSON# signal asserted.
Active Power Supply
Cold Standby Power
Supply
Power Distribution Board
MCU
&
Ckts
12Vout
12Vout
12V
Iout sense
SYS-PWOK
SYS-PSON#
PWOK1
PSON1#
PWOK2
PSON2#