DS1000/2000 Correspondence Course
System Configuration
NEC America DS1000/2000 Workbook ◆ 25
Calculating the DS2000 load factor
1. Indicate the quantity for each item installed in the Qty column.
2. For each item, multiply the Load Factor times the Qty and enter the value in
the Total Load column.
3. Add all the values in the Total Load column and enter the value in row 1.
4. Determine the System Load Factor capacity of the power supplies installed in
your system and enter the total in row 2.
A 4-Slot Cabinet can have only 1 power supply. An 8-Slot Cabinet
can have up to 3 power supplies. You cannot have more than 2
16DSTU PCBs per power supply, regardless of System Load Factor
calculations.
Exceeding the System Load Factor will cause the system’s power
supplies to automatically shut down.
5. Compare the entry in row 2 to your entry in row 1. Row 1 must always be
equal to or less than the entry in row 2.
Do not operate your system if the System Load Factor total
(row 1) exceeds the allowable value (row 2).
DS2000 System Load Factor Calculations
Description Load Factor Qty Total Load
16DSTU PCB 16
4ASTU PCB 8
8ASTU PCB 12
110-Button DSS Console 2
24-Button DSS Console 1
Total DSS Consoles installed cannot exceed 4
2-OPX Module 3
Item 1: Total load for this configuration
Item 2: If you have one power supply installed, enter 48.
If you have tw
o power supplies installed, enter 80.
If you have three power supplies installed, enter 112.
Notes:
• A 4 slot cabinet can only have 1 power supply.
• An 8 slot cabinet can have up to 3 power supplies. You cannot have more than two 16DSTU
PCBs per power supply, regardless of System Load Factor calculations.
• Exceeding the System Load Factor will cause the system’s power supplies to automatically
shut down and/or erratic system operation.
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