EPC is an acronym for Electronic Pump Controller. However it is much more than a simple pump controller. The EPC Servo Amplifier Module is a micro controller-operated component that can be applied to operate servo or proportionally operated pumps and valves. Because of its onboard microprocessor this unit can perform many additional functions that your typical Servo Amplifier can not. The unit can be configured for several types of control applications including:
For more information on the types of applications the EPC can be applied to visit the application page. Not sure if the EPC is right for your application? Ask your EPC Questions through our contact us page page or dial 414-327-1700 in the United States.
EPC Order Entry checklist
Every EPC order or request for quote requires a properly filled out EPC Order Entry Checklist, Oilgear document TOC1180. The checklist will only take a few minutes to complete. This document is in PDF format.
EPC Interface Software
The module is programmable through PC Interface software. This software is available for download at this site. The software can be downloaded here. If you experience difficulties with that installation, please download this file. Learn more about our EPC Software.
The EPC allows for a single control axis with a power amplifier to drive most servo valves, pumps, and proportional valves. The basic pump controller configuration allows for fast (up to a 1600Hz) closed loop response with both stroke position and pressure feedback. In addition, two independent function programs can be dynamically selected with a digital input signal. The unit also provides a digital output for simple diagnostics or a watchdog signal.
Three general-purpose analog inputs are provided for command and pressure feedback signals in either ±10 VDC, 0-to-20mA, or 4-to-20mA format. Additionally, one analog input is provided as a dedicated fine-adjustable LVDT stroke feedback device. The module allows for two low-power programmable diagnostic analog output voltage signals.
The EPC is configured by first assigning one of twelve built-in function programs to one or both of the program blocks. Typically, the output of the function programs is then passed to the Pump Controller, which provides the valve drive current.
If the full features of the module 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 diagram to the right is a generic graphical representation for reference only. Each application requires specific connections. If you are unsure of your configuration, please consult your user manual or Bulletin 836269. Documentation is available for download via the Technical Library. If further support is required contact Oilgear EPC support via our contact page, or call 800·558·6636 in the United States.