On many door control systems, it's necessary to make electrical connections to devices on the moving door. One example would be an exit bar-type device mounted on the door which signals the access control system to release an electromagnetic lock or shunt out the alarm system. The most basic way...
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On many door control systems, it's necessary to make electrical connections to devices on the moving door. One example would be an exit bar-type device mounted on the door which signals the access control system to release an electromagnetic lock or shunt out the alarm system. The most basic way to achieve this is with a door loop or cord.
Securitron's TSB-C surface-mounted door cord provides one of the simplest and economical solutions for power transfer.
The TSB-C is furnished with Securitron's Touch Sense Bar but may also be purchased separately. The cord consists of an 18" (46 cm) length of armored stainless steel cable with plastic end pieces. 3/8" (9.5 mm) holes are drilled in the face of the door and frame to admit the cord and the end pieces are screwed down over the holes to create a neat, finished appearance. The door cord comes furnished with end pieces set in two colors: light gray and black. This allows selection of end pieces color so as to blend into the door/frame color as much as possible.
The ample 18" cord length allows use of any type of door, including center pivot doors and doors that open well past 90 degrees The TSB-C cable has an interior diameter of .25" (6mm) which will support interior wire cables up to .2" (5mm) thick. This permits employing thick enough wiring for most high current applications.
These cords work well for many applications. However, they are sometimes unsatisfactory because door cords are highly visible, and therefore may become targets for vandals. So for aesthetics and endurance, alternative methods transferring power are sometimes required.
Wired hinges and power transfers are the two most frequently used devices. Power transfers come in two basic flavors: surface-mounted and concealed.
Securitech's TransX™ provides a method to bring those wires invisibly from the door to the frame. The wires are concealed within modules applied to the door and frame and travel within a steel channel between the modules.
TransX is designed for installation on doors with standard full mortise hinges. Long lead wires from the control trim and or lock body, eliminating wire connections within the door. Pull the long leads through the TransX door module into the frame module and make connections there.
As a result, locksmiths can troubleshoot the connectors at the frame module. Remove the frame module cover and test connections.
The frame module cover has a lip which extends under the header. This prevents removal of the cover or access to the terminal strip while the door is closed. Tamper switches are available.
TransX transfers multiple wires from the door to the frame in a concealed, protected manner. Lock installers bring their wires through the door into the TransX door module. They snake the wire through to the frame module and make their connections on the bottom side of the terminal strip.
ELECTRIC DOOR STRIKE SECURITY
Although the use of positive latching electric locking devices should provide secure mechanical locking, sometimes they do not. Here are some important details to remember when specifying, installing and testing electric strikes.
Surface-mounted strikes ARE designed for use with rim latches, such as exit devices.
Flexing of the frame: Under certain conditions, a door frame may twist allowing the latch to ramp, thereby allowing the door to open. This condition has been observed on both steel and aluminum door frames. It is increased if there is inadequate latch strike engagement. Latch spring tension is another variable in this equation, but latch spring tension is not usually the problem. Reinforcing the door frame and using stronger fasteners are two good ways to prevent/correct unlocking issues. The problem is due to the change in the latch/strike engagement caused by a twisting door frame.
How To Transfer Wires From The Door To The Frame.
The Zodiac Lite Kit comes with a single reader, door control module, and hand-held programmer. No cards, PC, or software are required.