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.
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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: 
