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Servo Amplifier

The AN220 servo amplifier is suitable for controlling the most popular servo valves.

The module provides current ranges of -20mA, -100mA, and -400mA for this purpose. The valve modulation can be adjusted by an internal/external limiter.

In addition, the module is equipped with a PID controller, allowing a control system with a servo valve to be set up.


  • linear output stage with three current ranges (-20mA, -100mA, and -400mA)
  • one side of load at zero voltage, allows use as current driver
  • protected against wrong polarity
  • 6 user-selectable voltage inputs (10 k /V), one –10V input via ramp generator, one 4...20mA input, one differential input
  • internal/external modulation limiting for positive and negative valve modulation, adjustment selectable
  • as separate or symmetrical
  • PID controller with external disable
  • control parameters adjustable on the front plate
  • ramp has wide range of adjustment (0.1...10sec) and can be disabled externally
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