I was invited to observe the installation of Securitron Maglock Digital Keypad and Touch Sense Bars on a pair of interior doors at a medical facility. To our advantage, the section of building into which the access control system was being installed was equipped with a drop ceiling. However, some of...
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The Securitron Touch Sense Bar, model TSB-3, is an exit device for doors secured by magnetic locks. The Touch Sense Bar is not mechanical; it operates by sensing the electricity expended by the hand(s) when it contacts the aluminum bar. When the bar is touched, a relay in the sensor is tripped, cutting power to the magnetic lock(s). The sensitivity of the bar is adjustable using the switch on the rear of the bar at the hinge side of the door. In addition, the switch has a push button that when pressed, trips the relay, cutting power to the magnetic lock(s). The Touch Sense Bar can be cut to accommodate varying door widths.
The Securitron PM linear power supply provides regulated 1 Amp DC power using a plug-in transformer and a circuit board housed in a steel enclosure. The PM power supplies include AC fusing, DC output, automatic circuit breakers, battery charging capability and fire alarm compatibility. The PM-24 provides 24 volts, 1 Amp capacity.
Note: Always comply with applicable building codes. Check with our local authority having jurisdiction (LAHJ) before installing electronic lock systems.
The installation proceeded with determining the locations for the plug-in transformer, power supply enclosure and DK-26 CPU board enclosure. Within the secured area, in close proximity to the pair of doors. is a supply storage/janitorial/electric room, where the plug-in transformer and the two enclosures were installed. The enclosures were mounted close to the ceiling of the room and the plug-in transformer was plugged in to a nearby wall outlet.
The DK-26 keypad was installed onto the left wall (facing the doors) by drilling a 5/8" diameter hole and running the sixteen feet of cable up to the top of the wall.
To pull the DK-26 cable; a two-inch diameter hole was drilled through the top plate directly above the DK-26 cable hole in the wall. A length of stranded wire was lowered through the two-inch hole and a piece of bent wire fished the cable out of the 5/8-inch diameter hole in the wall. The DK-26 cable was tied to the stranded wire, and pull up through the two-inch hole.
The DK-26 was then mounted onto the wall using the two supplied screws.
A decision was made to locate each Touch Sense Bar at 1-3/8" in from both edges of the door. The two bars were cut to size to accommodate the doors using a hacksaw. The bars were cut from the end opposite the circuit board. The bars were located, leveled, and installed at approximately 41" above the finished floor with the circuit boards at the hinge edges of the two doors. Because the end pieces of the Touch Sense Bars are plastic, it provides a cleaner installation for one end of the door cord to exit the End Piece Cover instead of using the door cord end piece. To do this, the plastic end pieces were modified to accommodate one end of each stainless steel door cord. The other end of the door cord would be attached to the frame once the system was wired.
The plastic end pieces are made of two parts: end piece and the end piece cover. A 1/4" diameter hole was drilled through bottom of both pieces on the circuit board (hinge) side of bar. The hole was enlarged slightly to provide sufficient room for the stainless steel door cord. The end piece cover was then removed and a slot slightly larger than the diameter of the door cord was cut from the edge to the hole in the end piece. This slot would allow the door cord to be mounted onto the end piece cover and still be slid in place onto the bar.
Once the bars were installed onto the doors, the touch sense bar's wiring would be run through the door cord. The door cord would then be fed through the opening in the end piece cover. An "E" clip would be positioned at just about the end of the door cord, stopping it from being removed. The wiring was connected and the end piece cover was slid in place onto the end piece. The screws were installed. The door cords were pulled tight against the end piece cover and a second "E" clip was installed against the cover from the outside. With the two "E" clips in place, the door cord would not accidentally come loose.
The bracket-mounted M68LS Magnalocks are supplied with a template. Use the template to determine the mounting locations for the magnets. The magnetic lock brackets were installed onto the header portion of the metal frame using blind nuts. Holes were drilled to accommodate the blind nuts as well as for the wiring. The two blind nut bracket holes provide adjustment for the magnet to slide forward or back in order to align with the strike plate. Once in position, three additional machine screws are installed to secure the bracket in place.
Securitron Magnalock Corp. has developed more than 25 packaged electronic access control systems for controlling from one to three doors. These packaged electronic systems include the lock(s...