The 764-ECM 4 Speed Motor Controller is designed to allow the replacement of a 24VAC operated, discrete speed ECM fan motor with a speed adjustable ECM fan motor & controller combination.

When used with a PWM capable EC motor the 764-ECM Controller will provide four discrete speed selection inputs. Each input is manually adjustable, allowing for optimal RPM / flow rates in your application.

The 764-ECM Series is line voltage independent and requires only a 24 VAC power source.

Motor speed control is accomplished via a pulse width modulated signal from the 764-ECM which drives the ECM motor through it's dedicated control signal input.