Linear actuator UM 90

electricscrewAC

The outdoor motor actuators are in a aluminium housing (fig. 1), protection class IP 54 or in a stainlesssteel housing (fig. 2 – 4), protection class IP 65. Thehousing cover is screwed with A2 screws.Both housings are of modular designs, and containcontrol devices like control contactors, motor protection switches, control and signalling contacts as wellas the wiring connected to the terminal strips.Through the modular design of the motor actuators,customer specific requirements such as mechanicalor electric interlocking, actuators with key interlockingsystem or “on-site/remote operation” can be realized.For entering the control and record lines you will findtwo screw connections M20, M25 or M31,5.The outdoor actuator offers a vermin secure ventilation of the housing as well as a thermostatically controlled heating.The manual emergency operation works by means ofa bevel gearing. A displacement of the bevel gearwheel for the reversal of the sense of rotation is notnecessary any more as the rotating direction can bechanged easily on the actuating rod which leads tothe switch. Therefore, the electric connection is thesame.Of course, the motor circuit is inevitably disconnectedright before the crank is fixed to the square counterpiece.A device in which a padlock can be hinged, preventsfrom unauthorized operation of the hand emergencyactuator and opening of the cover.The fixing of the motor actuator is effected by meansof four threaded bolts on the back side of the housing.