The PDU-S1 is a medium power, brushed PWM servo amplifier in a 3U Eurocard form factor. Control can come from an analog (10V) command, or digital Magnitude and Direction signals. This multi-purpose amplifier contains both Velocity and Torque feedback loops. Inputs are provided to allow tachometer feedback in the Velocity Mode. The Torque Mode can be used for torque control applications, or in conjunction with a digital servo controller capable of computing Position and Velocity loop values. The high switching frequency of the PAU-S1 allows the amplifier to drive very low inductance loads.

The PDU-S1 has Under Bias Voltage shutdown as well as Over Current and Over Voltage protection. Fault conditions are reported digitally to the controller connections, and indicated visually by front panel LEDs.

An optional backplane is available to allow quick and easy access to motor, power, control and other I/O signals. This greatly simplifies implementing the PDU-S1 in a motion control system.


  • Eurocard 3U Form Factor
  • Digital Control of PWM using Magnitude and Direction Signals
  • Jumper Selectable Velocity or Torque Modes
  • Visual and Digital Fault Indicators
  • Over Voltage, Over Current and Under Bias Protection
  • PWM Frequency: 80 kHz
  • Continuous Current: 5 Amperes
  • High Bandwidth
  • Bus Voltage: 20 - 40 VDC
  • Advanced Design, High Quality and High Reliability at a Lower Cost


Standard Models: 4/10 6/10
Bus Voltage 20 to 40  VDC 20 to 60  VDC
Peak Output Current* 10 A for 0.5 Sec 10 A for 0.5 Sec
Continuous Output Current* 5 A 5 A
Command Input Voltage 0 to 10V 0 to 10V
Command Input Impedance 20 kOhm 20 kOhm
Switching Frequency 80 kHz 80 kHz
Minimum Load Inductance 0.1 mH 0.1 mH
Torque Gain 1.0 A/V 1.0 A/V
Bandwidth 20 kHz 20 kHz
Weight 1.25 Lb (567 g)  
Recommended Chassis CHU-S3 or CHU-S6 Eurocard
Available Accessories ACC-V1A Backplane, ACC-V2B Inductor Board, PCU-S1 Rack Mount Power Supply, ACC-V3A PMAC Interface Board  

*All ratings with forced air cooling to maintain 40C heat sink temperature. Failure to keep constant air flow to the heat sink will reduce the output current capacity and may result in damage to the unit.

Ordering Information

Product Order Number
PDU-S1-4/10 Amp 40 VDC/10A Peak WS-010-0001
PDU-S1-6/10 Amp 60 VDC/10A Peak WS-010-0002
ACC-V1A Backplane WS-011-0003
ACC-V2B Inductor Board WS-011-0006

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All data sheets are in Adobe Acrobat format.