AC/DC Brushless Servo Amplifiers
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Copley Servo Amplifiers for
AC/DC Brushlesss Motors
Copley’s technologically enhanced brushless servo amplifiers are offered in both AC or DC versions.

These amplifiers were designed to meet the needs of industry, with exceptional flexibility and performance.

Whether trapezoidal, UV sinusoidal, analog, Halls, resolver, or direct drive, Copley has an amplifier that is ideal for your requirements.

Browse Model Specifications
Summary by Model
5224AC, 5424AC, 5224DC, 5424DC
7225AC, 7425AC, 7225DC, 7425DC
7225X1, 7225X2
7226AC, 7426AC, 7226DC, 7426DC
7227AC, 7427AC, 7227DC, 7427DC
7228AC, 7428AC, 7228DC, 7428DC
7229AC, 7429AC, 7229DC, 7429DC


5224AC/DC, 5424AC/DC Trapezoidal Brushless
  • 6 step drives motors with digital Halls sensors
  • Velocity mode using encoder or Hall feedback
 (Click on Model Number to go to Data Sheet)
Model Oper. Voltage Cont. Current Peak Current Motor Watts/HP Size (LxWxH)(in.)
5224AC +32 to +132VAC 10 Amps  20 Amps  1kW / 1.4 7.50 x 6.94 x 2.72
5424AC +32 to +264VAC 10 Amps  20 Amps  2kW / 2.7
5224DC +45 to +186VDC 10 Amps 20 Amps 1kW / 1.4 7.00 x 5.55 x 2.00
5424DC +45 to +373VDC 10 Amps 20 Amps 2kW / 2.7

7225AC/DC, 7425AC/DC U-V Sinusoidal Brushless
  • For external commutation controllers using encoder motor feedback
  • Inputs analog ±10V U and V phase current commands
  • Amplifier synthesizes W phase current for sinusoidal commutation
  • Optional output filter (“F” Option) to minimize noise
 (Click on Model Number to go to Data Sheet)
Model Oper. Voltage Cont. Current Peak Current Motor Watts/HP Size (LxWxH)(in.)
7225AC +32 to +132VAC 10 Amps  20 Amps  1kW / 1.4 7.50 x 6.94 x 2.72
7425AC +32 to +264VAC 10 Amps  20 Amps  2kW / 2.7
7225DC +45 to +186VDC 10 Amps  20 Amps  1kW / 1.4 7.00 x 5.55 x 2.00
7425DC +45 to +373VDC 10 Amps 20 Amps  2kW / 2.7

7225X1 (Single) & 7225X2 (Dual Axis) U-V Sinusoidal Brushless
  • Analog U-V Inputs
  • Low profile and compact size
  • I2T current compensation
  • Isolated power stage
 (Click on Model Number to go to Data Sheet)
Model Oper. Voltage Cont. Current Peak Current Motor Watts/HP Size (LxWxH)(in.)
7225X1 +24 to +180VDC  10 Amps  25 Amps  1.5kW / 2.0  7.35 x 4.40 x 1.54. 
7225X2 +24 to +180VDC  10 Amps  25 Amps  1.5kW / 2.0  9.84 x 4.92 x 1.811

7226AC/DC, 7426AC/DC Analog Hall Brushless
  • For linear brushless motors with analog Hall sensors
  • Produces 3 - phase sinusoidal currents in motor
  • Works with controllers that output ±10V torque command
  • Optional output filter (“F” Option) to minimize noise
 (Click on Model Number to go to Data Sheet)
Model Oper. Voltage Cont. Current Peak Current Motor Watts/HP Size (LxWxH)(in.)
7226AC +32 to +132VAC 10 Amps  20 Amps  1kW / 1.4  7.50 x 6.94 x 2.72
7426AC +32 to +264VAC  10 Amps  20 Amps 2kW / 2.7 
7226DC +45 to +186VDC  10 Amps  20 Amps  1kW / 1.4  7.00 x 5.55 x 2.00
7426DC  +45 to +373VDC 10 Amps  20 Amps  2kW / 2.7 

7227AC/DC, 7427AC/DC Resolver Brushless
  • Encoder emulation with 10, 12, 14, or 16 bit selectable resolution
  • Sinusoidal drive & analog tach signal for velocity loop
  • Optional output filter (“F” Option) to minimize noise
 (Click on Model Number to go to Data Sheet)
Model Oper. Voltage Cont. Current Peak Current Motor Watts/HP Size (LxWxH)(in.)
7227AC +32 to +132VAC 10 Amps  20 Amps  1kW / 1.4 7.50 x 6.94 x 2.72
7427AC +32 to +264VAC 10 Amps  20 Amps   2kW / 2.7
7227DC +45 to +186VDC 10 Amps  20 Amps 1kW / 1.4 7.00 x 5.55 x 2.00
7427DC +45 to +373VDC 10 Amps  20 Amps 2kW / 2.7

7228AC/DC, 7428AC/DC DSP Servo Amplifier
 with Motion Explorer™ Software
  • Fast, precise servo setup and tuning.
  • Auto Phasing & Auto Tuning
  • Exceptional positioning accuracy & repeatability.
  • Optional output filter to minimize noise.
  • Standard quadrature output from linear encoder feedback input.
 (Click on Model Number to go to Data Sheet)
Model Oper. Voltage Cont. Current Peak Current Motor Watts/HP Size (LxWxH)(in.)
7228AC +32 to +132VAC  10 Amps 20 Amps  1kW / 1.4  7.50 x 6.94 x 2.72
7428AC +32 to +264VAC  10 Amps  20 Amps  2kW / 2.7 
7228DC +45 to +186VDC 10 Amps 20 Amps 1kW / 1.4 7.00 x 5.55 x 2.00
7428DC +45 to +373VDC 10 Amps 20 Amps 2kW / 2.7

7229AC/DC, 7429AC/DC Direct Drive Brushless
  • Interfaces with PMAC2 or other controller for H-bridge control
  • Digital current monitors for U and V phase currents
  • All tuning and commutation performed internally by controller
  • Optional output filter (“F” Option) to minimize noise
 (Click on Model Number to go to Data Sheet)
Model Oper. Voltage Cont. Current Peak Current Motor Watts/HP Size (LxWxH)(in.)
7229AC +32 to +132VAC 10 Amps  20 Amps  1kW / 1.4  7.50 x 6.94 x 2.72
7429AC +32 to +264VAC 10 Amps  20 Amps  2kW / 2.7 
7229DC +45 to +186VDC 10 Amps  20 Amps  1kW / 1.4  7.00 x 5.55 x 2.00
7429DC +45 to +373VDC 10 Amps  10 Amps  2kW / 2.7