Siemens Hipath 5000 - Page 1152

Identifying System Power Requirements
P31003-H3560-S403-54-7620, 09/05
D-16 HiPath 3000 V6.0, HiPath 5000 V6.0, Provisional Service Manual
power_calc.fm
Checking Whether the Output of a Power Supply Unit is Sufficient
● HiPath 3550 with USPSC-D
The maximum nominal output at the –48-V output can be increased from 53 W to 140 W
by using the EPSU2 external power supply unit.
● HiPath 3350 with USPSC-D
Due to build-up of heat, the 5-V output format can only be loaded with a maximum of 20 W.
A maximum nominal output of 40 W is possible by using the EPSU2external power supply
unit. In addition, the maximum nominal output of the –48-V output increases from 53 W to
140 W.
● HiPath 3500 with UPSC-DR
The maximum nominal output of the –48-V output can be increased from 53 W to 140 W
by using the EPSU2-R external power supply unit.
● HiPath 3300 with USPSC-DR
Due to build-up of heat, the 5-V output format can only be loaded with a maximum of 20 W.
A maximum nominal output of 40 W is possible by using the EPSU2-R external power sup-
ply unit. In addition, the maximum nominal output of the –48-V output increases from 53 W
to 140 W.
Sample calculation for a HiPath 3550
1. Determine secondary power requirement at the 5-V output
The maximum nominal output of UPSC-D at the 5-V output amounts to 40 W and is
enough to cover the specified power requirement.
power requirements of the boards/
components used =
7.00 W 1 x CBCC
10.00 W 1 x HXGS3 (including ventilator
kit)
0.90 W 1 x TS2
2.40 W 3 x SLU8
1.30 W 1 x 8SLA
5.00 W 1 x SLC16N
0.00 W 12 x BS3/1
= secondary power requirement at the
5-V output =
26.60 W