Fire and smoke actuator with temperature-dependent operating speed

A fire and smoke actuator configured to actuate a damper between an open position and a closed position, the fire and smoke actuator comprising:

• a drive motor;
• an actuator output for coupling to the damper to move the damper between the open position and the closed position;
• a drivetrain operably coupled between the drive motor and the actuator output, wherein the drive train includes one or more components that are more susceptible to wear and/or damage at an operating temperature of the drivetrain that is elevated by an external heat source;
• wherein the drive motor, when activated, is configured to actuate the actuator output, via the drivetrain, to move the damper between the open position and the closed position;
• a temperature sensor configured to detect a temperature representative of the operating temperature of the drivetrain of the fire and smoke actuator;
• and
• a drive circuit operably coupled to the drive motor and the temperature sensor, the drive circuit configured to activate the drive motor to move the damper between the open position and the closed position at a non-zero speed, wherein the non-zero speed is lower when the temperature sensor detects that the operating temperature of the drivetrain is elevated by the external heat source than when the temperature sensor detects that the operating temperature of the drivetrain is not elevated by the external heat source.