DS820 - Power Amplifier Unit for Eddy Current Dynomometers

Wall and Rack Mount

DS820 Power Amplifier Wall Mount Unit for Eddy Current Dynomometers DS820 Power Amplifier Rack Mount Unit for Eddy Current Dynomometers

The DS820 Power Amplifier Unit supplies DC power to an Eddy Current dynamometer coil. The Power Amplifier Unit provides a current-regulated output that is proportional to a 0 to +10 VDC or 0 to 20 mA control input, which may be customer supplied or from a Dyne Systems controller. A current limiting potentiometer is included in the unit and the Power Amplifier Unit is set up for various dynamometer ratings. It is available in both a wall mounted or rack mounted unit depending on the amperage needs. (See Features and Specs for details.)

  • Interfaces with all existing Dyne Systems dyno controllers and most competitors’ controls
  • Stand-alone operation supported
  • LCD diagnostic readouts display field current, input command, and Power Amplifier Unit status and faults
  • 0 to +10 VDC or 0 to 20 mA control input
  • Dry contact and PCL-Level I/O
  • Advanced fault detection (e.g. blown fuse, incorrect transformer phasing and other wiring errors)
  • Integral safety inputs included
  • Simple setup and calibration
  • Includes control power transformer
  • Rack Mount Units: available up to 30 amp at 277 VAC input (250 VDC output)
  • Wall Mount Units: available up to 100 amp at 480 VAC input (430 VDC output)

  • Engine
  • Electric Motor
  • Transmission / Differential / Transaxle


  • Wall Mount Units: 16.25”w x 20.5”h x 8.75”d
  • Rack Mount Units: 19”w x 3.5”h x 15”d

Control Power:

  • 120 V, 1.0 Amps
  • 50/60 Hz compatible

Power Amplifier Unit (Field) Power (maximum):

  • Wall Mounted Units: 480 V, 100 Amps
  • Rack Mounted Units: 277 V, 30 Amps

Environmental Limits:

  • Air Temperature: 0° to 40° C (104° F)
  • Relative Humidity: 0 to 95%
  • No condensation allowed

Optional Configurations

  • Rack Mount
  • Wall Mount
  • Combination DS820 / DS830