PMBUP-3-T | Belimo | Damper ActuatorPMBUP 3 T Damper Actuator, On Off, floating, 24 to 240 VAC non spring return PMB series damper actuators are designed to accommodate a mounting bracket and coupler or linkage for remote linkage connection. A visual position indicator shows the actuators position through out its stroke. For outdoor applications, the installed actuator must be mounted with the actuator at or above horizontal. For indoor applications the actuator can be in any position