D.7  
Checking Whether the Output of a Power Supply Unit is Sufficient 
 
Apart from the secondary power requirements, the power output must also be checked to ensure that the maximum possible output of the system's power supply unit is sufficient. For this, the power requirement on the 5-V output format and on the -48-V output format must be examined separately.
Caution  
To guarantee smooth system operation, the nominal output of the power supply unit at the 5-V output and at the -48-V output must be greater than the respective secondary power requirement.  

Procedure  
Proceed as follows to identify the secondary power requirement of a system:
 1.   Determine secondary power requirement at the 5-V output
   
 
5 V power requirement of the boards/components used  
=  
secondary power requirement at the 5-V output  
 2.   Determine secondary power requirement at the -48-V output
   
 
-48-V power requirement of the boards/components used  
+  
power requirement of connected workpoint clients (analog and digital telephones), key modules and adapters  
=  
secondary power requirement at the -48-V output  
Using the specified values, check whether the total power requirement exceeds the maximum possible output of the power supply unit at the 5-V output or at the -48-V output. If this is the case, you have the following options:
 •   HiPath 3800
The number of LUNA2 power supply units can be increased.
 •   HiPath 3550 with UPSC-D
The maximum nominal output of the -48-V output can be increased from 53 W to 110 W by using the external power supply Powerbox PB3000 with LUNA2.
 •   HiPath 3350 with UPSC-D
The maximum nominal output of the -48-V output can be increased from 53 W to 110 W by using the external power supply Powerbox PB3000 with LUNA2.
 •   HiPath 3500 with UPSC-DR
The maximum nominal output of the -48-V output can be increased from 53 W to 110 W by using the external power supply Powerbox PB3000 with LUNA2.
 •   HiPath 3300 with UPSC-DR
The maximum nominal output of the -48-V output can be increased from 53 W to 110 W by using the external power supply Powerbox PB3000 with LUNA2.

Sample calculation for a HiPath 3550  
 1.   Determine secondary power requirement at the 5-V output
   
 
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 TS2N  
 
 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
 
 
    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.
 2.   Determine secondary power requirement at the -48-V output
   
 
power requirements of the boards/components used =  
 0.50 W
 
1 x CBCC  
 
 2.80 W
 
1 x HXGS3 (including ventilator kit)  
 
 0.00 W
 
1 x TS2N  
 
 0.00 W
 
3 x SLU8  
 
 1.30 W
 
1 x 8SLA  
 
 0.00 W
 
1 x SLC16N  
 
 24.00 W
 
12 x BS3/1  
+  
power requirement of connected workpoint clients, key modules and adapters =  
 4.32 W
 
6 x optiPoint 500 advance  
 
 8.40 W
 
12 x optiPoint 500 basic  
 
 2.40 W
 
8 x optiPoint 500 entry  
 
 0.00 W
 
2 x Hicom Attendant BLF  
 
 0.00 W
 
2 x optiPoint BLF  
 
 0.40 W
 
8 x optiPoint key module  
 
 0.50 W
 
2 x optiPoint acoustic adapter  
 
 1.80 W
 
6 x analog telephones  
=  
secondary power requirement at the -48-V output =  
 47.83 W
 
 
    The maximum nominal output of UPSC-D at the -48-V output amounts to 53 W and is enough to cover the specified power requirement.

HiPath 3000/5000 V9, Service Documentation, Issue 10   up Top
Disclaimer & Copyright   ID: P31003H3590S100017620   2014-02-27