Power amplifiers

Power amplifiers for proportional hydraulics ensure precise, dynamic, and energy-efficient control of modern hydraulic systems. In the Hydromot shop
you will find robust, flexibly configurable modules that reliably convert weak input signals into powerful output currents
for proportional valves. Learn more...

Product image Power amplifier - PAM-190-P-A
Power amplifier - PAM-190-P-A
- Power amplifier for proportional valves in a DIN EN 175 301-803 A connector housing
- Digital reproducible settings- Free scalability of the input signal
- Can also be used as soft switch amplifier (soft switching on and off)
- M12 plug
- Programmable via USB/LIN bus
- Free parameterization of ramps, MIN and MAX, dither (frequency, amplitude) and PWM frequency
- Parameter settings via integrated keys and a selector switch (functionally reduced compared to the USB / LIN bus)
- Optional: Version with Can-Bus on demand - output current 1 A / 2.5 A
- Adaptable to all standard proportional valves
195,86 EUR
167,40 EUR excl. 17% tax
incl. 17% tax excl. Shipping costs
167,40 EUR excl. 17% tax
Product image Power amplifier - PAM-190-P-I
Power amplifier - PAM-190-P-I
- Power amplifier for proportional valves in a DIN EN 175 301-803 A connector housing
- Digital reproducible settings
- Free scalability of the input signal
- Can also be used as soft switch amplifier (soft switching on and off)
- M12 plug
- Programmable via USB/LIN bus
- Free parameterization of ramps, MIN and MAX, dither (frequency, amplitude) and PWM frequency
- Parameter settings via integrated keys and a selector switch (functionally reduced compared to the USB / LIN bus)
- Optional: Version with Can-Bus on request
- Output current 1 A / 2.5 A
- Adaptable to all standard proportional valves
195,86 EUR
167,40 EUR excl. 17% tax
incl. 17% tax excl. Shipping costs
167,40 EUR excl. 17% tax
Product image Power amplifier - PAM-190-P-IO
Power amplifier - PAM-190-P-IO

- Power amplifier for proportional valves in a DIN EN 175 301-803 A connector housing
- I/O - Link Port Class B, with internal galvanic isolation of the additional supply voltage
- complies with specification V1.1, data rate COM3 = 230.4 kBaud
- Digital, reproducible settings
- Can also be used as soft switch amplifier (soft switching on and off)
- M12 plug
- Parameterizable via I/O - Link
- Free adjustment of ramps, MIN and MAX, dither (frequency, amplitude) and PWM frequency
- Output current up to max. 2.5 A, parameterizable
- Adaptable to all standard proportional valves
264,24 EUR
225,85 EUR excl. 17% tax
incl. 17% tax excl. Shipping costs
225,85 EUR excl. 17% tax
Product image Power amplifier - PAM-199-P
Power amplifier - PAM-199-P
- General power amplifier, one module for all applications
- GL Certification
- Control of directional valves or two pressure or throttle valves- Analogue or digital inputs
- Compact housing
- Digitally reproducible settings
- Free scaling of the analog inputs
- Monitoring of the input signal (for e.g. joystick)
- Characteristic linearization via 10 XY points per direction
- Free parameterization of RAMP, MIN / MAX, output current and DITHER (frequency, amplitude) - Range of nominal output current: 0.5 ... 2.6 A
- Simple and application-oriented parameterization with WPC software
- Fault diagnostics and extended function check
434,56 EUR
371,42 EUR excl. 17% tax
incl. 17% tax excl. Shipping costs
371,42 EUR excl. 17% tax
Product image Power amplifier - PAM-140-P-A
Power amplifier - PAM-140-P-A
- Power amplifier for proportional valves 0...10V Input
- Printed circuit board in IP-65 housing
- Digital reproducible settings
- Free scalability of the input signal
- Reference voltage for supply of potentiometers
- Free parameterization of ramps, MIN and MAX, dither (frequency, amplitude) and PWM frequency
- Output current 1 A and 2.5 A
- Simple and application-oriented parameter setting
- Error monitoring and extended functional checks
- Programmable via USB/LIN bus, easy parameterization with the WPC-300 software
- Parameter settings via integrated keys and a selector switch (functionally reduced compared to the USB / LIN bus)
- Adaptable to all standard proportional valves
224,93 EUR
192,25 EUR excl. 17% tax
incl. 17% tax excl. Shipping costs
192,25 EUR excl. 17% tax
Catalog Image Power amplifier - PAM-140-P-I
Power amplifier - PAM-140-P-I
- Power amplifier for proportional valves with 4...20 mA Input
- Printed circuit board in IP-65 housing
- Digital reproducible settings
- Free scalability of the input signal
- Reference voltage for supply of potentiometers
- Free parameterization of ramps, MIN and MAX, dither (frequency, amplitude) and PWM frequency
- Output current 1 A and 2.5 A
- Simple and application-oriented parameter setting
- Error monitoring and extended functional checks
- Programmable via USB/LIN bus, easy parameterization with the WPC-300 software
- Parameter settings via integrated keys and a selector switch (functionally reduced compared to the USB / LIN bus)
- Adaptable to all standard proportional valves
224,92 EUR
192,24 EUR excl. 17% tax
incl. 17% tax excl. Shipping costs
192,24 EUR excl. 17% tax
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Thanks to features such as ramp generation, dither signal and digital parameterization, our power amplifiers enable optimized pressure and flow control – ideal for mechanical engineering and mobile applications. High-quality materials, IP-protected housings and temperature-resistant electronics ensure maximum durability in industrial and mobile environments. Via USB/LIN bus programming or integrated controls, all devices can be easily adapted to individual requirements. Discover our Hydromot product range for reliable, energy-efficient and precisely tuned hydraulic control.

 

Power Amplifiers for Hydraulic Proportional Valves – Frequently Asked Questions

What is the main function of a power amplifier for hydraulic proportional valves?

Power amplifiers ensure precise control of proportional valve coils. They convert weak input signals into powerful output currents that drive the solenoids.

  • Signal conversion: Converts voltage or current into suitable control current
  • Accurate spool positioning: Enables sensitive valve control in real time
  • Increased precision: Fast control response for flow and pressure

Which programmable functions are typically integrated in modern power amplifiers?

Modern amplifiers include various additional functions for system optimization:

  • Ramp generation: Smooth start/stop operation
  • Dither signal: Reduces static friction, improves dynamics
  • Parameterization: MIN/MAX, ramps, dither (amplitude & frequency), PWM frequency
  • Characteristic curve linearization: Up to 10 XY points per direction
  • Soft-switch function: Gentle switching on/off
  • Programming via USB, LIN bus or IO-Link Port Class B

Which materials are used in power amplifiers and what protection do they offer?

Power amplifiers are robust and designed for industrial use:

  • Housing materials: Aluminum or galvanized steel
  • Electronics: FR4 boards, temperature resistance up to 70–85 °C
  • Protection classes: Options such as IP65 against dust/moisture
  • Wear-resistant coating for corrosion protection

Which industries use power amplifiers?

Applications wherever precise hydraulic control is required:

  • Presses, injection molding machines, machine tools
  • Cranes and mobile machinery
  • Automation technology & robotics

What are the key benefits of power amplifiers for system efficiency?

Power amplifiers significantly increase hydraulic system efficiency:

  • Energy savings: Precise signal amplification
  • Fast response times: below 10 ms
  • Overload & dead-band compensation for higher reliability
  • Performance increase: up to 30%

Which criteria are important when selecting a suitable power amplifier?

The right selection depends on the following parameters:

  • Valve type: e.g. NG6 for lower currents
  • Output current: typical 1–3 A (max. 2.6 A)
  • Input signal: e.g. 0–10 V, 4–20 mA
  • Hydraulic pressure: up to 350 bar
  • IP protection class depending on environment
  • Parameterization for ramps & dead zones

What is the expected lifetime of a power amplifier?

Service life depends on load and temperature:

  • 10–15 years under ideal conditions
  • Over 1 million switching cycles
  • -20 to +50 °C recommended
  • Overheating may reduce lifetime