Series APD 3280 Valve Positioners

The APD 3280 controls the position of a valve or linear actuator by comparing a DC input (control signal) to that of a position feedback potentiometer or slidewire. An SPDT relay provides bi-directional (open-close) signals to
drive a motor to open or close a valve. A bi-color LED indicates the Open/Close relay contact status.

When the valve position, as indicated by the feedback potentiometer, becomes equal to the position as represented by the control input, the relay will go to the neutral position and the motor will halt. A multi-turn deadband control allows precise tuning of the motor response to eliminate hunting or oscillation. Heavy-duty relay contacts allow the module to directly control high capacity loads as long as the switching current with within the limits shown at left.