The EEDP automatically controls the speed of single phase (230 VAC, 50/60 Hz) voltage controllable electric motor with a 0-10 VDC or 0-20 mA control signal. It is possible to invert the control signal to 10-0 VDC, 20-0 mA. An illuminated external power switch is provided. A supplementary terminal block is rovided to branch off 230 VAC noncontrolled for 3-wire motor connection or damper operation. The working principle of this product series is based on zero crossing detection. An optotriac combined with a microprocessor ensures flawless and accurate control. A kick star feature is selectable internally to start the motor for 10 sec at maximum speed. The EEDP controllers have inbuilt connections for thermostat (Tk) motor protection (NC-contact). When the motor thermostats open, because of motor overheating, the circuit is broken and the controller stops power to the motor. After eliminating the cause of overheating the fan can be restarted by turning off the controller for a few moments. A safety isolator/switch disconnector should be installed on the mains side of all motor drives; refer to SISO.
