Valve driver expansion to be connected to FREE ADVANCE controllers via CANopen. It is provided with pre-set parameters for main valves manufacturers (Parker-Sporlan, Sanhua, Danfoss, Emerson-Alco, Saginomiya) and further configurable for additional valve models. Superheat algorithm programmable via FREE Studio Plus. Flexible solution to cover all needs, from small to large machines. Up to four EEVDs can be connected to one FREE Advance.