The M640 series is a family of Honeywell Actionator motor actuators used in HVAC and industrial process control systems. These motorized rotary actuators convert electrical control signals into precise mechanical positioning, driving dampers, valves, and linkages for modulating control.
Typical units feature a reversible drive motor and internal limit switches for bidirectional operation. Common applications include air handling units, economizers, and building automation systems where accurate positioning is required.
This series spans the M640A, M640B, and M640D model variants across a range of part numbers, all sharing the common M640 actuator platform.