High-speed switching makes noise in the drive output. This noise flows from the drive to the power supply, and can have an effect on other equipment. Install a noise filter to the input side of the drive to decrease the quantity of noise that flows to the power supply. A noise filter will also stop noise from entering the drive from the power supply.

  • Use a noise filter specially designed for drives.

  • Install the noise filter as close as possible to the drive.

Figure 1. Example of Connecting the Noise Filter on the Input Side (Primary Side)
  • Power Supply
  • Input side (primary side) noise filter
  • Drive
  • Other controller
Note:

The input side (primary side) noise filter model is LNFD-xx.