708-BVmA Series
Electronic Fan Speed Controls

The Controller phase proportions (modulates) the single phase power to regulate RPM as determined by a 2–10VDC or 4–20mA DC input signal provided by the customer.

The 708-BVmA Series Controller provides independent “maximum” and “minimum” speed limit adjustments. Also included, a separate continuous minimum speed or “drop out” function at minimum input.

Application

The variable speed Controller is used for adjustment of motor RPM within a limited range of operating temperatures that assure adequate ventilation of the motor. The Controller is designed for air moving applications using squirrel cage or propeller type fans. It may be suitable for other, non air-moving, direct drive motor applications. Motors should be open, drip-proof types.

Features and Benefits

   •  Applicable for shaded pole or permanent split capacitor motors.

   •  Multi-voltage applications.

   •  Minimum/Maximum speed adjustments.

   •  Motor cut-out adjustment.