NEC DSX80/160 Load Factor Calculation

The combination of lines and extensions you can connect to your DSX system may be limited by the System Load Factor.

Use the DSX-80/160 System Load Factor Worksheet above to verify your system’s configuration.

When entering data on the worksheet, for each installed card, make entries for each Load Type.

There are two Load Types to consider: 5 VDC and 40 VDC.

To check your system configuration:
1. Indicate the quantity for each card installed in the Qty column. (The number of keysets, single line sets, and DSS Consoles does not affect the load factor.)
2. For each item and for each Load Type, multiply the Qty times the Load and enter the value in the Total column. For example, two 16ESIU Cards have a load of 16 for 5 VDC and 40 for 40 VDC.
3. Add up the entries in each Total column and enter the values in Item 1: Load Type Totals.
4. Review Item 2: Power Supply Capacity and determine the capacity of the power supplies installed in your system.
5. Compare the capacities in Item 2 to your entries in Item 1. Item 1 must always be equal to or less than the entry in Item 2.

Important! Do not operate your system if the total for either Load Type exceeds the Power Supply Capacity of your installation.