Specifications

Power Distribution Board (PDB) QSSC-S4R Technical Product Specification
114
7 SMB_LINK_3V3SB_CLK 8 GND
9 SMB_LINK_3V3SB_DAT 10 GND
11 PS1_PWRGOOD 12 PS1_VIN_GOOD
13 PS1_PRESENT_N 14 PS2_PWRGOOD
15 PS2_VIN_GOOD 16 PS2_PRESENT_N
17 PS3_PWRGOOD 18 GND
19 PS3_VIN_GOOD 20 PS3_PRESENT_N
21 PS4_PWRGOOD 22 PS4_VIN_GOOD
23 PS4_PRESENT_N 24 PS_FORCEPR_N
25 PS_INT_ALERT_N 26 PS_EN_R_N
27 NC 28 PWOK_SYS *
29 System Reserved* 30 System Reserved*
31 PS3_AC_RANGE 32 PS4_AC_RANGE
33 NC 34 NC
* PWOK_SYS = System POK * PS_INT_ALERT_N= SMBAlert
Table 61. 2X4-pin HSBP/Fan Power Connector
Ref
Des Description Vendor P/N
RA 2x4 HSBP/Fan power Molex 39-30-7085
Pin Signal Description Pin Signal Description
1 P12V_240VA 5 GND
2 P12V_240VA 6 GND
3 P12V 7 GND
4 P12V 8 GND
13.2.2 Voltage Regulation
The output voltages must stay within the following voltage limits when operating at steady state and dynamic loading
conditions.
Table 62. Voltage Regulation Limit
Converter Output TOLERANCE MIN NOM MAX UNITS
+12VDC -5%/ +5% +11.40 +12.00 +12.60
VDC
3.3Vsb*
See PS spec, measured at the PDB harness connectors
* The PDB should provide a droop share capability for the sdby output, so that total sdby current supplied by the PDB
would be exceeding the max PS rating by a factor 1.5 (tbd).
13.2.3 DC Output Load Requirements
This describes the +12V output power requirements from the power distribution board for one to four 850W power
supplies installed and functional.
Note: The combined continuous total power limit for all outputs is 2300W maximum.
Table 63. DC Output Load Ratings
Configuration
1+0 (min) or 1+1 2+0, 2+1 or 2+2 3+0 or 3+1 4+0
+12V 3.3VSB +12V 3.3VSB +12V 3.3VSB +12V 3.3VSB
MA
X
Load (total)
69.2A 6.3A 131A 12A* 191A 15A* 191A 18A*
MIN Static Load
1.0A 0.5A 1.0A 0.5A 1.0A 0.5A 1.0A 0.5A
Peak load (total)
88A 6A 167A 12A* 246A 15A* 246A 18A