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A sliding electric gate with electric motor and backup battery in case of mains failure. Note also the Infrared obstacle sensor located on the wall to prevent the gate from closing while a vehicle or other obstacle is in the way.
If the small entrance in the door of a large gate has a high threshold, it may be called a manway. If it is a separate, narrow entrance next to the main gate, it may be called a pedestrian entrance. This type of double entrance is rather uncommon, however, and was only worth having at large sites where there was a lot of coming and going.
The operator is placed in the space above the sliding door. An electric motor, geared down to get a lower speed and a higher torque, drives a pulley at one end of a belt. The door is clamped to the belt. To open the door, the motor turns the pulley, which in turn turns the belt, which in turn drags the door. To close the door, the reverse occurs.
[1] [2] The company designs and manufactures vehicle, pedestrian and passenger access control equipment. According to the IMS research, titled "The World Market for Pedestrian Entrance Control Equipment" (2013), Automatic Systems is ranked No. 1 as speed gates supplier for Mass Transit Applications in the world and for Intrabuilding in EMEA. [3]
Pushbutton – the door opens when a user presses a button. Push-&-go – the door opens fully when the user begins opening it. Access control – the door opens when an access control system determines the user is authorized to go through. A trigger from any of the above requests that the door be opened (or reopened if it was closing).
Drop Arm style optical turnstiles. An optical turnstile is a physical security device designed to restrict or control access to a building or secure area. Optical turnstiles are usually a part of an access control system, which also consists of software, card readers, and controllers.