Energy series PLCs are industrial PLC controllers that are freely
programmable and compatible with Arduino® software for private
and industrial use.
They act as an electronic control unit and are designed and manufactured for
maximum compatibility with the majority of sensors and actuators
on the market.
All Energy devices can be programmed in open source
and thus lend themselves to countless uses, even using many of the
C libraries already developed that simplify their programming.
EnergyExpander3000 is a compact device in the series, but already
with wide availability of peripherals including dual modbus outputs, 
it is possible to use it as an expansion.