Electronic controller card with amplifier and special features.

The EPC3 is the third generation of Oilgear's line of EPC (Electronic Pump Control) products. The EPC3 module is a fully programmable micro-controller and amplifier for servo operated hydraulic pumps and valves. Programming and tuning is made easy via a standard USB input - no proprietary cable is required.


The EPC3 allows the (1) single control axis with a power amplifier to drive VS-, VV- and VM-controlled pumps and valves. The basic pump controller configuration allows for closed-loop response with both stroke position and pressure feedback. In addition, two (2) independent function programs can be dynamically selected with a digital input signal. The unit provides a digital output for simple diagnostics or a watchdog signal.

Three (3) general-purpose analog inputs are provided for command and pressure feedback signals, including ±10 VDC, 0-to-20 mA, or 4-to-20mA. Additionally, one (1) analog input is provided as a dedicated fine-adjustable LVDT stroke feedback device. The module allows for (2) two low-power programmable output signals.

The device is configured by first assigning one of twelve (12) built-in function programs to each of the two (2) program blocks. Typically, the output of the function programs is then passed to the EPC3’s internal Pump Controller, which provides the valve command.

If the full features of the EPC3 are used, up to three (3) independent closed-loop PI (Proportional with Integral) control algorithms are utilized. Most function programs provide a closed-loop control algorithm for pressure or stroke, while the Pump Controller can be configured for both stroke and power feedback.

The EPC3 is programmable through the PC Interface software. Please see the attached documentation for detailed information.




EPC 3 PC software | zip | 15 MB
EPC Software – June 2015

  • Fully programmable via USB
  • 12 built-in programs
  • 3 independent closed-loop PI (Proportional with Integral)
  •  Inputs
    • 1 digital
    • 3 analog (general purpose)
    • 1 analog (fine-adjustable for LVDT)
  • Outputs
    • 1 digital
    • 2 (programmable)
    • 1 (LVDT excitation sinusoidal)
    • 1 (servo valve command)

The EPC3 unit can be configured for several types of control applications including:

  • Flow Control
  • Pressure Control or Load Control
  • Flow Control with Pressure Limit (PQ-Control)
  • Horsepower Control (Pump Stroke and Pressure)
  • Pressure Control with Flow Preset
  • Advanced Control with Feed-Forward

Sales brochure for the EPC3 Electronic Pump Controller Card, 1/2017
EPC3 Quick Start  Quick Start 836270B  June 2015. Must-read information prior to installing an Oilgear EPC3 electronic controller
EPC DRAWINGS  Series 300 EPC Controller  June 2015

Please see the included documentation, or contact an Oilgear representative or authorized re-seller.