Analog Systems Design Guide

Step 3 - Select a Power Supply

Built-in power is often included in the Page Control, so an additional power supply may not be needed. The amount of power required for a paging system is based on the quantity and type of Page Control and Speakers/Horns selected.

  • Products that Neither Consume or Provide Power are a 0
  • NOTE: One VPU = 50 mA., -24 Vdc
  • VPU Listings are on the Product List

Easy Selection Considerations:

Products provide or consume power and are assigned a VPU

(VPU: Power Provided + # or Power Consumed - #)

Simply Total All


a. Page Control VPU's
1 x 30 = +30 VPU Provided
b. Speaker/Horn VPU's
1 x 15 = -15 VPU Provided
c. Subtract b from a
           = +15 VPU Provided
            No Power Required

  • Have VPU's Left Over - You Can Add More Speakers!
  • Need More - Simply Select a Power Supply with Enough VPU's to Make Up the Difference