PN# 500-10420 Rev. A.3, 5/00 SECURITRON 32, 34, 62 AND 82 SERIES MAGNALOCK TABLE OF CONTENTS AND GUIDE TO THIS MANUAL There are numerous Magnalock versions and numerous different applications exist for them. Accordingly, this manual provides a broad range of information- only a portion of which is applicable to any individual use. This manual guide provides a brief summary of many of the Sections which allows you to consult only the portions of the manual that apply to your application. SECTION 1. DESCRIPTION--------------------------------------------------------------------- Page 1 SECTION 2. PHYSICAL INSTALLATION --------------------------------------------------- Page 1 This is the largest part of the manual with sections that explain the different types of physical installations which vary according to door or gate types as well as Magnalock versions. SECTION 2.1 SURVEY --------------------------------------------------------------------------- Page 1 This section concerns how to pre-plan the installation. SECTION 2.2 INSTALLATION TOOL KIT -------------------------------------------------- Page 1 This section explains an available accessory. SECTION 2.3 GENERAL INSTALLATION ON OUTSWINGING DOOR ------------ Page 1 SECTION 2.3.1 STRIKE PLATE MOUNTING---------------------------------------------- Page 1 SECTION 2.3.2 MOUNTING THE MAGNET------------------------------------------------ Page 3 The above three sections explain the most common Magnalock installation on a door that swings away from the lock. They also include general mounting instructions and should therefore be read for all installations. SECTION 2.4 GENERAL INSTALLATION ON INSWINGING DOOR --------------- Page 5 This section explains installation of "F" type Magnalocks on inswinging doors. SECTION 2.5 MOUNTING PROCEDURES FOR SPECIFIC DOOR TYPES ------- Page 6 The following six sections provide specific advice depending on door type which includes recommended bracketry. SECTION 2.5.1 ALUMINUM FRAME GLASS DOOR MOUNTING------------------- Page 6 SECTION 2.5.2 THE UMB BRACKET FOR ALUMINUM AND CONCRETE ------ Page 7 SECTION 2.5.3 SOLID GLASS DOOR MOUNTING-------------------------------------- Page 8 SECTION 2.5.4 DOUBLE DOOR MOUNTING --------------------------------------------- Page 9 SECTION 2.5.5 CONCRETE HEADER OR WOOD FRAME MOUNTING ---------- Page 9 SECTION 2.6 MOUNTING THE MAGNALOCK ON EXTERIOR GATES----------- Page 10 This section, which includes three drawings, covers outdoor use of the Magnalock on a variety of gate types. SECTION 2.7 USE OF DRESS COVERS---------------------------------------------------- Page 12 This section introduces the Dress Cover which is used after physical mounting to improve installation appearance and tamper resistance. SECTION 2.8 TAMPER PROOFING THE MAGNALOCK ------------------------------ Page 12 This section should be read for any installation in a high vandalism area. Ó Copyright, 2000, all rights reserved · Securitron Magnalock Corp., 550 Vista Blvd., Sparks NV 89434, USA Tel: (775) 355-5625 · (800) MAGLOCK · Fax: (775) 355-5636 · Website: www.securitron.com An ASSA ABLOY Group company Rev. A.3, 5/00 SECTION 3. ELECTRICAL INSTALLATION ----------------------------------------------- Page 13 SECTION 3.1 GENERAL ELECTRICAL CHARACTERISTICS ----------------------- Page 13 This section explains technically the Magnalock's electrical characteristics as a load and is for reference. SECTION 3.2 STANDARD LOCK ------------------------------------------------------------- Page 13 This section explains powering and switching the Magnalock. SECTION 3.3 AVOIDING POOR RELEASE CHARACTERISTICS------------------- Page 13 This section warns against wiring mistakes specific only to the model 32 series. SECTION 3.4 WIRE GAUGE SIZING--------------------------------------------------------- Page 14 This reference section explains how to select wire size for applications where the lock is distant from the power supply. SECTION 3.5 SENSTAT MAGNALOCKS: “SC”------------------------------------------ Page 14 Read this section if you have a Senstat Magnalock. SECTION 3.6 DOUBLE DOOR PROCEDURE FOR STATUS REPORTING------- Page 15 This section applies if you have Senstat locks on a double door and want them to report as a single lock. SECTION 3.7 DOUBLE DOOR CONTROL SWITCHING-------------------------------- Page 15 This section applies whenever you have two locks controlled by a single switch. SECTION 3.8 EMERGENCY RELEASE ----------------------------------------------------- Page 16 This section should be understood by all installers. APPENDIX A TROUBLESHOOTING---------------------------------------------------------- Page i Refer to this section before calling the factory on any operating problem. APPENDIX B CALCULATING WIRE GAUGE SIZING----------------------------------- Page ii This detailed reference section explains how to select wire gauge in complicated multi-lock installations. APPENDIX C CONSIDERATIONS FOR MAXIMUM PHYSICAL SECURITY ------ Page iii This reference section explains the technical aspects of lock holding force and resistance to attack. It contains numerous installation techniques which act to insure high lock security. It must be read for high security applications and also has excellent educational value. Rev. A.3, 5/00 Use of the Magnalock (or any lock) can lead to an unsafe condition within the building if it is controlled in a manner that improperly restricts passage through certain doors. The most important area of concern is to insure that building evacuation is not impeded in the event of a fire or other emergency condition. Consult with the local building or fire department to insure that the controls installed with the Magnalock create a safe and code legal installation. The Magnalock has an unlimited operating life and receives a great deal of cumulative shock over this life from the door closing and from persons attempting to open the door when it is secured. It is therefore vital that it be firmly mounted to the door header. If this is not done, a person's use of the door could cause the magnet body to fall and possibly cause an injury. The blind nuts furnished with the Magnalock will create strong and permanent mounting when correctly collapsed inside the header. If they are not collapsed, an unsafe condition will result. Make sure you understand section 2.3.2 in the manual on magnet mounting and collapsing the nuts. SHOCK HAZARD. The Magnalock must be operated from a DC power supply of appropriate capacity and voltage. The DC output of the power supply must not be connected to earth ground but must be isolated, or a shock hazard and possible damage to the product could result. All Securitron power supplies are delivered with isolated DC outputs and the majority of commercial supplies are also furnished this way. If you are not certain that the DC outputs of your power supply are isolated, check with an Ohmmeter between earth ground and +V, and then between earth and 0V (negative). You should not have continuity. - Rev. A.3, 5/00 Page- 1 SECURITRON 32, 34, 62 AND 82 SERIES MAGNALOCK INSTALLATION INSTRUCTIONS 1. DESCRIPTION Securitron’s Magnalock family represents the state of the art in electric locking. Three different size models are available: The Model 32 and Model 34 series with a holding force of 600 lbs. (275 Kg.); The Model 62 series with a holding force of 1,200 lbs. (550 Kg.) and the model 82 series with a holding force of 1,800 lbs. (820 Kg.). Several mounting and electronic options are available which are described in this manual. Note that most points in this manual apply to the entire Magnalock series. When a point applies to a particular Magnalock version, this will be specifically noted. 2. PHYSICAL INSTALLATION 2.1 SURVEY Because of the wide variety of situations in which the Magnalock may be utilized, first survey the physical area in which it is to be installed and determine the best method of mounting it. In this initial planning two considerations come into play: the mounting method must be strong enough so that the full holding power of the Magnalock can be effective, and the Magnalock and wiring must be protected to a reasonable degree from damage by intruders or vandals. Often an accessory bracket is necessary, either furnished by Securitron or made up by the installer. The brackets that can be used are covered later. Note that Magnalocks are supplied with a complete set of fasteners. When shipped outside of North America, metric fasteners are supplied and therefore the drawings in this manual show both US and metric fasteners. 2.2 INSTALLATION TOOL KIT Securitron offers an installation tool kit (part # IK or IKM, for metric use) which includes special drills, a drilling template, a blind nut collapsing tool and extra fasteners and hardware. If the installation is for a large number of locks or if the installer expects to perform other installations, we recommend the purchase of this kit as it reduces installation labor and improves job quality. 2.3 GENERAL INSTALLATION ON OUTSWINGING DOOR The Magnalock should be mounted under the door frame header in the corner farthest from the hinges (see Figure 4). Most commonly, it is positioned horizontally but vertical positioning should also be considered. In some cases for example, the horizontal header on an aluminum frame glass door is not as strong as the vertical extrusion, so vertical mounting would be preferred. This type of installation places the Magnalock such that the door swings away from it. This configuration is necessary for all facility exit doors (otherwise, the Magnalock would be on the outside of the building). For interior doors, the Magnalock should still be mounted in this manner unless security planning anticipates a physical assault on the Magnalock from that side of the door in which case see section 2.4 on inswinging door installation. 2.3.1 STRIKE PLATE MOUNTING The strike should be mounted before the magnet on the upper corner of the door. The first step is to locate the precise place you intend to mount the strike including deciding whether you want to mount the Magnalock horizontally or vertically (see Section 2.3.2). The top of the strike should be positioned about 1/10" (2.5mm) below the line where the door meets the door stop, or below the header if there is no door stop to permit free closing. If the strike is mounted vertically instead of horizontally, increase this stand-off distance to 2/10" (5mm). More clearance is needed on a vertical mount because the strike projects out from the door and can scrape the side frame as the door swings closed on its arc. Final positioning of the strike is dictated by the desired position of the magnet. The strike must be centered on the magnetic poles (3 bars) and the magnet is normally moved an inch or so in (or down) from the frame corner so that the magnet mounting holes will not have to be drilled awkwardly in the corner. When the strike position has been chosen, step two is to drill three holes in the door following the template. Step three is mounting the white plastic bushings which surround and insulate the roll pins into the 1/2" (12.7mm) holes. The bushings are employed to insulate the strike electrically from a metal door and also help prevent the roll pins from wearing the door. Rev. A.3, 5/00 Page- 2 FIG. 1: STANDARD MAGNET DIMENSIONS AND ASSEMBLY If "G" option is furnished, (62 and 82 series only), the wire cable emerges from a 3/4" male; 1/2" female conduit fitting on the end of the magnet. The mounting holes are counterbored from both sides to make the magnet non-handed 32 (mm) 34 (mm) 62 (mm) 82 (mm) Blind Nut PN# BN-250 or PN# BN-6MM (Metric) (Pack of 40 with tool) d Mo el 62 Gold Washer PN# FW-1 (Pack of 24) 1/4-20 x 3" Cap Screw PN# SCS-35 (Pack of 4) 6mm-1mm x 75mm PN# 300-12650 d Mo Tamper Cap PN# FC-1 (Pack of 24) el 32 Length 8" 203 9.5" 241 8" 203 12" 305 Width 1.88 47.8 1.75 44.5 2.9 73.7 2.9 73.7 Depth 1.5 38.1 1.125 28.6 1.75 44.5 1.75 44.5 Recommended Tools: 1/2" or 3/8" Drill Motor 1/8", 3/8", 1/2" Drill Bits 1/2" Open or Crescent Wrench 3/16" Hex Key (Allen Wrench) Hammer, Center Punch Masking Tape, Fish Tape or Leed Wire Wire Strippers/Cutters Crimp Wire Connectors Multi-Meter 1/4-20 x 2 1/4" Cap Screw PN# 300-12750 or 6mm-1mm x 55mm PN# 300-12925 (For Model 32 Magnalock) Step four is to insert the strike mounting hardware. Roll pins furnished with the strike should be hammered into the strike. Be careful not to hit them too hard as it is possible to raise dents on the strike surface by over driving the pins which degrades strike flatness and therefore holding force. The strike is secured by the central strike mounting screw. Two flexible washers are then placed between the strike and the door with the strike mounting screw passing through the washers to provide flexibility. A third rubber washer is furnished. This is not normally used but may be employed in case the spacing of the magnet and strike is a little off. Adding the third washer will move the strike closer to the magnet. Do not place the washers around the roll pins. The roll pins should "float" in their holes and not bind. Their only purpose is to prevent the strike from rotating or spinning. In step five, the strike is secured to the door via the supplied sex bolt. Note that we supply a massive 1 1/4” diameter sex bolt as it is the only point of attack from the outside of the door. It can be difficult to align the strike mounting screw with the sex bolt, so the following technique is recommended: Start the sex bolt in its 1/2" (12.7 mm) hole but thread the strike mounting screw into it (with strike plate and washers) before hammering the sex bolt down. Next, hammer the sex bolt down and then screw the strike mounting screw in the rest of the way. This makes alignment much easier. Step six is to verify proper mounting. When the strike is mounted, make sure it flexes freely around the washer stack. This flexing allows the Magnalock to pull the strike into perfect alignment for maximum holding force. It is never possible for a door and frame to line up well enough for the Magnalock to function unless the strike is allowed to flex. Rev. A.3, 5/00 Page- 3 FIG. 2: STRIKE DIMENSIONS AND ASSEMBLY Sex Bolt, Models 32, 62, 82, PN# SB-1, SB-1M (Metric) Model 34, PN# 330-12100, 330-12150 (Metric) Bushing (2), PN# 560-12050 R PN u bb # R er W - Was 1( Pa her ( ck 2) of 24 ) Roll Pin (2), PN# 330-10800 1/4" x 1 1/4" 32 (mm) 34 (mm) 62 (mm) 82 (mm) Length 6.25" 158.8 6.4" 164.5 6" 152.4 9.5" 240 Width 1.63 41.4 1.44 37 2.75 70 2.75 70 Depth .5 12.7 .44 11.3 .5 12.7 .5 12.7 Bushing, PN# 330-12000 Flathead Screw 5/16-18 x 1 3/4" PN# 300-13600 or 8mm-1.25mm x 40mm PN# 300-13750 (Metric) 2.3.2 MOUNTING THE MAGNET Step one is to locate the mounting position of the magnet. It will mount in the door frame header with four socket cap machine screws for metal frames or wood screws for wood frames. In mounting the Magnalock, six conditions must be followed: -- The frame header must present a flat surface for the magnet to mount to. 1 7/8” (48mm) for the model 34, 2 1/4” (57mm) for the model 32 and 2 1/2" (63.5mm) for the model 62 and 82 are required from the door to the rear of the magnet for proper mounting (as shown in Figure 4). If this length of flat surface is not available, the use of stop filler plates and/or header brackets available from Securitron can usually resolve the problem. Again, refer to Figure 4. -- The frame area selected must be structurally strong enough to yield a properly secure installation. The issue of frame strength must be considered in selecting vertical or horizontal mounting. One often finds on aluminum headers that the horizontal extrusion is weak and can be snapped off, so vertical mounting would be preferred. It is also possible to reinforce the header by adding a steel plate. The installer must avoid mounting the magnet to a wobbly or weak support or the intrinsic security of the lock will be diminished. -- The magnet face must be parallel to the strike plate. -- The magnetic poles (three metal bars on the Magnalock), must be centered on the strike. -- The magnet must make solid contact with the strike but still allow the door to close properly. -- The direction of door opening must pull the strike directly away from the magnet rather than sliding it away. Electromagnets hold only weakly in the shear direction of pull. Once a solid flat surface has been prepared for the magnet, it must be positioned so that its face is parallel and centered to the strike plate. When the magnet has been experimentally positioned this way, it's ready for mounting. Rev. A.3, 5/00 Page- 4 In step two, holes must be drilled for the mounting screws, and a 1/2" (12.7mm) diameter wireway hole should be drilled. Step three is to install the blind finishing nuts. For proper strength, the 1/4-20 (or 6mm) mounting machine screws must be secured by these nuts. They will work on any thickness metal header and are used as follows: A 3/8" (9.5 mm) hole is drilled following the template for each nut. The nut is then pressed up into the hole and lightly seated with a hammer tap. The nut is then collapsed inside the header. If you have Securitron's IK installation kit, the nuts may be collapsed by the use of the blind nut placement tool. A special collapsing tool is also included with each Magnalock. It is somewhat slower to use than the more elaborate tool found in the installation kit. For its use, see Figure 3. FIG. 3: COLLAPSING THE BLIND NUTS COLLAPSES WHEN CAP SCREW IS TURNED WITH ALLEN WRENCH WHILE TOOL IS HELD FAST WITH BOX WRENCH DRILL 3/8" (9.5MM) HOLE PRESS IN BLIND NUT AS SHOWN BLIND NUT HEADER HOLD WITH WRENCH OR VISE GRIP WHILE TURNING CAP SCREW KNURL TOOL TWO FLAT WASHERS CAP SCREW1/4-20 X 1" (US) OR IF SCREW IS STIFF TO TURN, 6MM-1MM X 25MM (METRIC) ADD LUBRICANT TO WASHERS WHILE TURNING WITH ALLEN WRENCH, PRESS IN TO KEEP NUT SEATED IN HEADER Step four is to make the necessary wire connections. Step five is to mount the magnet via the supplied machine screws (see Figure 1). Don't forget to use the gold flat washers. They prevent the narrow screw heads from digging into the resin which could cause damage. Tighten the screws to a snug fit only. Use the supplied thread-lock on the screw threads to avoid the possibility of the screws loosening over time. Do not drill out the mounting holes to make for an easier fit. You may cut an internal wire and void the warranty. FIG. 4: TYPICAL MOUNTING ON OUTSWINGING DOOR Header Bracket if frame is too narrow Blind Nuts Stop Filler Plate if stop is too narrow Stop Washer Stack 1/4-20 (6mm) Mounting Screws Sex Bolt Model 62 or 82 is shown with four magnet mounting screws. Model 32 or 34 employs only two. Strike Magnet Body Tamper Caps (One shown) .75" (19mm) Door 2.5" (63.5mm) Rev. A.3, 5/00 Page- 5 2.4 GENERAL INSTALLATION ON INSWINGING DOOR WITH Z BRACKET In cases where the Magnalock must be mounted on the inswinging side of the door to protect it from physical assault, the magnet body is mounted flush on the wall above the door frame and a "Z" bracket is affixed to the door which positions the strike in front of the Magnet (part # Z-32, Z-62 or Z-82 with the suffix “M” for metric). The model 34 series is not offered in a face mount version. Securitron's "F" series Magnalocks are used, as they have mounting holes through the face of the magnet and wire exit to the rear. Figure 5 shows this configuration. Note that the model 62F has five mounting holes through the face. The “extra” hole is to provide flexibility in mounting when the magnet body is positioned partly on the top of the door frame and partly on the wall. In that instance, it becomes possible to secure the model 62 magnet body with three screws which all go into the frame header (many wall types such as sheet rock do not constitute a secure mounting substrate). Note that when the roll pin bushings are used, they protrude through the Z bracket and interfere with the Z bracket cover. If a Senstat lock is being employed, the roll pin bushings must be used to provide insulation. They should be cut with a hacksaw to function in the bracket. If the lock is not Senstat, omit use of the roll pin bushings and drill 3/8" (9.5mm) diameter holes for the roll pins instead of 1/2" (12.7mm). Read sections 2.3, 2.3.1, and 2.3.2 for additional general information on mounting. FIG. 5: F MAGNET DIMENSIONS Blind Nut PN# BN-250 or PN# BN-6MM (Metric) (Pack of 24 with tool) If "G" option is furnished, the wire cable emerges from a 3/4" male; 1/2" female conduit fitting on the end of the magnet (62 and 82 models only) Model 62F er sh ( Pac a W -1 ld Go # FW PN 1/4-20 x 2 1/2" Cap Screw PN# SCS-25 or 6mm-1mm x 60mm PN# SCS-60mm (Metric) Pack of four screws f2 ko 4) Model 32F 32 (mm) 62 (mm) Tamper Cap 82 PN# FC-1 (Pack of 24) (mm) Length 8" 203 8" 203 12" 305 Width 1.88 47.8 2.9 73.7 2.9 73.7 Depth 1.5 38.1 1.75 44.5 1.75 44.5 Rev. A.3, 5/00 Page- 6 FIG. 6: F MAGNALOCK MOUNTING Roll pin plastic bushing require 1/2" (12.7mm) holes and must be shortened to work in Z bracket. Roll pin bushings may be omitted if lock is not Senstat. Then drill 3/ 8" (9.5mm) holes for roll pins. Strike Magnet Architectural Cover slides on last with open side up and is attached with supplied double stick tape Z Bracket T-Nut requires 3/8" (9.5mm) Dia hole in bracket and accepts strike mounting screw Header Use 1" mounting screw supplied with Z bracket, PN# 300-13400 or 300-13450 (metric) Washer Stack Z Bracket Cap Screw: 5/16" x 18, PN# 300-13500 or 8mm-1.25mm, PN# 300-13425 (metric) Sex Bolt Drill 1/2" (12.7mm) hole #14 Hex Sheet Metal Screw (2) PN# 300-13200 Door 2.5 MOUNTING PROCEDURES FOR SPECIFIC DOOR TYPES 2.5.1 ALUMINUM FRAME GLASS DOOR MOUNTING This is a common door type that utilizes the Magnalock. Certain mounting problems can arise depending on the configuration of the door and frame. Often, the header is not wide enough for the depth of the magnet. This can mean that none of the mounting screws can be run into the header or that in the case of the model 62 and 82, only two of the four will fit. Another aspect of the mounting screw problem is that the screws might line up with the end of the header extrusion. Also the wires may exit beyond the end of the header so that they will be exposed and vulnerable to tampering. Most of the problems are solved by the use of Securitron's Universal Header Bracket (part # UHB-CL or UHB-BK). This bracket will function with the model 32, model 34 or model 62 Magnalock. A separate version (UHB-82) is offered for use with the longer model 82. The UHB extends the depth of the header either 1" (25mm) or 1 1/2" (38mm) depending on which way it's oriented. This usually allows mounting of all screws and since the bracket is itself a hollow extrusion, the wire is run inside the bracket and therefore is hidden. Even with use of the bracket, it is possible that one set of mounting screws may line up with the end of the header when the model 62 or 82 is used. To deal with this situation, some adjustment of the magnet mounting position is possible. Instead of the two rubber washers supplied with the strike, one or three may be used. If the door is secured only by the Magnalock (there is no mechanical swingbolt) the door closed position may be altered to allow all mounting screws to be used. Finally note that a model 62 installation on this type of door is acceptable if only two mounting screws are used. Since the screws run into steel nuts, the fastening technique is very strong. It is best to use all four screws, but particularly on this type of door, which is inherently not high security (the glass may be shattered for forced entry) firmly mounting two screws is acceptable. Aluminum frame headers typically employ a “blade” stop which is far too thin to provide a mounting surface for the magnet. Note that Figure 4 shows the Magnet mounting on the door stop. Accordingly, on aluminum frame glass doors, the magnet body mounts directly onto the header. This can be accomplished by cutting away a section of the blade stop. This technique is preferred in that the projection of the magnet into the opening is minimized. An alternate Rev. A.3, 5/00 Page- 7 method is to space the magnet down so as to clear the blade stop. This generally requires 1/2” of spacing (12.7mm) and Securitron offers brackets of the appropriate width with pre-drilled clearance holes for the Magnet mounting screws. These are the ASB-32, ASB-62 or ASB-82 (with finish suffix CL or BK). Figure 6 shows the use of the Aluminum Shim Bracket (ASB). Note that this bracket is not offered with the model 34. The UMB-34 bracket accomplishes the same function. FIG. 7: USE OF THE ASB BRACKET ON ALUMINUM DOOR/FRAME WITH BLADE STOP HEADER BLADE STOP ASB BRACKET DOOR STRIKE MAGNET ALUMINUM DOOR AND FRAME WITH BLADE STOP OCK NA L H OLE S G A 2M IV E E L 3 HA S F D O M /8 2 FOR A SB -6 2 2 3 . AS B OWN H IS S SEX BOLT, STRIKE MOUNTING SCREW AND HOLE IN DOOR CAN ALL BE RAISED BY 1/4" WHEN OFFSET STRIKE IS USED WITH MODEL 62 TO SUIT NARROW RAIL Another problem that can arise with aluminum frame glass doors is that in certain cases with the model 62, the height of the aluminum rail at the top of the door is not sufficient to mount the strike and sex bolt. Even when the sex bolt is installed in the lowest area of the top rail, the top edge of the strike will protrude above the rail. To solve this problem, Securitron offers the offset strike. The holes in the strike plate are offset 1/4" (6.4mm) from the center of the strike and this allows successful mounting on a narrow top rail. An approximate 10% loss of holding force results from the skewed position of the strike mounting screw but this is not significant on aluminum frame glass doors which are not high security barriers. The offset strike is supplied at no additional charge if it's called out with the order or may be sent as a replacement for the standard strike. This problem does not occur with the more narrow model 32 or 34 so no offset strike is offered with them. 2.5.2. THE UMB-BRACKET FOR ALUMINUM AND CONCRETE FILLED HEADERS The UMB-34 bracket replaces the functions of the ASB bracket (see previous drawing) and the CWB bracket (see Section 2.5.5) which permits mounting on wood or concrete filled steel headers. The UMB has the unique benefit of being reversible which alters the projection of the bracket with respect to the top of the magnet body and allows coping with different stop thicknesses. The bracket is delivered with a selection of fasteners for different applications. Wood screws are present for mounting on wood headers; cap screws are present for installation into blind nuts and sheet metal screws are present for optional mounting on steel headers. Rev. A.3, 5/00 Page- 8 FIG. 8: USE OF THE UMB BRACKET WITH THE MODEL 34 MAGNALOCK NOTE HOW BRACKET CAN BE REVERSED TO COPE WITH DIFFERENT STOP THICKNESSES HEADER BLADE STOP HEADER STOP UMB BRACKET DOOR UMB BRACKET DOOR ALUMINUM DOOR AND FRAME WITH BLADE STOP MAGNET STRIKE STRIKE MAGNET ALUMINUM DOOR AND FRAME WITH BLADE STOP THE TWO LARGER HOLES ARE FOR THE CABLE EXIT. THE TWO THREADED HOLES ACCEPT THE MAGNET MOUNTING SCREWS. THE REMAINING FIVE HOLES ACCEPT DIFFERENT FASTENER TYPES TO MOUNT TO DIFFERENT HEADERS. 2.5.3 SOLID GLASS DOOR MOUNTING The Magnalock is an excellent choice for securing 100% glass doors with no aluminum rail. The magnet is suspended in normal fashion from the header and the difficulty in the installation is mounting the strike plate on the glass door as glass cannot be drilled. This is accomplished by using Securitron's model GDB (or GDBM with metric fasteners) Glass Door Bracket and model AKG Adhesive Kit for Glass (see Figure 7). The GDB bracket will work with either the model 32, model 62, or model 82 Magnalock (but not with the model 34). The bracket is affixed to the glass surface by a special adhesive and the strike screws into the bracket conventionally. The adhesive provides a permanent bond stronger than the holding force of the Magnalock. Note that we have said "100% glass door". Some doors that appear to be glass are actually laminated with plastic. If the Magnalock with glass door bracket is used on this type of door, it is possible that failure will occur via delamination. In some cases the header of a glass door is vertical glass. The magnet can be mounted on such a header by using a 3" X 3" aluminum angle bracket (part number HEB-3G). The bracket is glued to the vertical glass header with Securitron's adhesive kit for glass and the magnet is screwed to the bracket. Rev. A.3, 5/00 Page- 9 FIG. 9: STRIKE INSTALLATION ON 100% GLASS DOOR 2 X RUBBER WASHERS SS GLA R DOO RB DOO S S GLA 5/16-18 x 1" (US) OR 8MM - 1.25MM X 25MM (METRIC) FLATHEAD SCREW KET RAC IKE STR 1/4" X 3/4" ROLL PINS WHITE PLASTIC BUSHING ADHESIVE BOND NOTE: OMIT ROLL PIN WHITE PLASTIC BUSHINGS 2.5.4 DOUBLE DOOR MOUNTING Several possibilities exist for this application. In some cases, one of the door leaves is pinned so that only one leaf is used and this is secured by a single Magnalock. If both leaves are to be active, two Magnalocks can be used. For the most attractive installation, they should be butted together but if obstructions exist in the header that interfere with mounting, the magnets can be separated somewhat. Another possibility is to use Securitron's split strike which is available for the model 62 and model 82 (use of a split strike with the model 32 or 34 series would provide inadequate security) In this method, a single Magnalock is mounted in the center of the header and a half size strike is mounted on each leaf. This reduces the holding force to about 550 lbs. (250 KG) for each leaf with the model 62 and about 850 lbs. (385 KG) for each leaf with the model 82. The split strike (part number ASS-62 or ASS-82 with “M” suffix for metric) is available either as part of a complete Magnalock or supplied separately as a replacement for the standard strike. Read section 2.7 for information on Dress Covers which improve the appearance of a double door installation. Certain electronic considerations also apply when Magnalocks are used on double doors. See section 3.5.4. 2.5.5 STEEL HEADER FILLED WITH CONCRETE OR WOOD FRAME MOUNTING Securitron offers a combined bracket in three versions to suit the three Magnalock families. The part number of the “Concrete/Wood Bracket” is CWB-32, CWB-62 or CWB-82. Two finishes are available (suffix CL or BK) and for metric locks, the brackets include the suffix “M”. Note that the CWB bracket is not offered with the model 34. It’s functions are accomplished by the UMB bracket for the model 34. In concrete filled headers, the blind nuts function normally but a problem can occur in pulling the hook up wires as it is difficult to run a wireway in concrete. The center of the bracket for the model 62 and model 82 versions forms a splice chamber if it's difficult to pull the wires back into the header. The model 32 version has a slot to bring the wire into the header because of the narrowness of the lock. Alternately the wires may be pulled through the edge of the bracket by drilling a hole if it's impractical to drill the concrete. A final technique for concrete headers is the use of Securitron's "G" version Magnalock (not available in the 32 or 34 series) which incorporates a 1/2" female/-3/4" male universal threaded conduit fitting. The conduit fitting is placed on the end of the magnet body, and the problem of pulling wires into concrete is bypassed as the wires may be run in pipe in a surface mount configuration. The mounting holes on "G" locks are counter-bored from both sides to make the lock non-handed. With a wooden frame, long wood screws are used to mount the Magnalock. The screws must penetrate as deeply as possible through the stop and frame into the header to yield adequate mounting strength. The Magnalock mounts to the bracket via machine screws and the bracket permits wood screws (furnished) to penetrate deeply into the header (see Figure 10) Rev. A.3, 5/00 Page- 10 FIG. 10: WOOD FRAME AND CONCRETE HEADER BRACKET CWB-32 S A E CH P LI C MB E R 1/2" MAGNET SCREWS INTO 2 OUTSIDE TAPPED HOLES SHEET METAL SCREWS USED FOR CONCRETE HEADER WOOD SCREWS USED FOR WOOD FRAME USE ALL FURNISHED SCREWS FOR PROPER MOUNTING SECURITY CWB-62 AND CWB-82 S A E CH C I L P MB E R 1/2" WOOD SCREWS USED FOR WOOD FRAME MAGNET SCREWS INTO 4 OUTSIDE TAPPED HOLES SHEET METAL SCREWS USED FOR CONCRETE HEADER 2.6 MOUNTING THE MAGNALOCK ON EXTERIOR GATES A popular application for the Magnalock is to secure motorized or manual exterior gates. The Magnalock has several benefits in this application. Gates tend not to be precisely fitted so electric bolts suffer from alignment failures. The Magnalock is designed to be self aligning and tolerates considerable inconsistency in the gate closed position as regards upward/downward alignment, side alignment and twisting. The Magnalock is also fully sealed and waterproof so it is generally unaffected by tough environments. The drawings and descriptions which follow, show conceptual installation concepts for different types of gate security applications. Note that the model 62 and model 82 are most commonly used in gate installations. They have conduit fittings available (“G” option) while this is not available on the model 32 or 34 Most gate installations also call for higher levels of holding force as gates are often large and poorly fitting. It’s also often the case that an intruder is able to physically apply more force to defeat a gate lock than is the case with (especially) an outswinging door wherein the intruder can only pull on it. The model 32 or 34 however may be used on certain gates with success. A good example is a sliding gate where the Magnet can be mortised into a post against which the gate slides. Securitron also offers the model 34R Magnalock which is specifically designed for mortising (see catalog). Because of the wide variety of gates in existence, each installation has to be considered special and normally, bracketry must be made up on site. The concept is to mount the magnet on a fixed post and the strike plate to the swinging or sliding member of the gate. Position both components so that the strike plate slaps against the magnet face on closure. Usually, the "GF" version of the Magnalock is used for gates. "G" calls out a conduit fitting mounted on the magnet end and "F" calls out mounting holes through the face (see Figure 5). The magnet typically screws onto a back plate fashioned on site and the back plate is welded onto the fixed post. Rev. A.3, 5/00 Page- 11 A back plate or Securitron's Z bracket must also typically be provided for the strike plate. The strike plate cannot be directly welded to the gate as it will not be able to flex and self align. It must be screwed onto a surface with the washer stack used to provide flexibility. Note that if Securitron's Z bracket is used, it typically bolts to the gate rather than is welded as it is aluminum. Read sections 2.3, 2.3.1, and 2.3.2 for additional general information on mounting. FIG. 11: MOUNTING TECHNIQUES FOR GATES SINGLE SWING GATE CONDUIT FITTING MAY EXIT TOP OR BOTTOM GF MAGNET Z BRACKET BOLTED TO SWING ARM STRIKE DOUBLE SWING GATE Z BRACKET BOLTED TO SWING ARM INTERFERENCE PIECE MUST BE ADDED TO Z BRACKET MOTORIZED OPENING MUST BE COORDINATED DIRECTION OF OPENING SLIDING GATE CONDUIT FITTING GATE EDGES EXTENDED ROLL PIN LOCK NUTS ANGLE BRACKET ANGLE BRACKET SPRING GF MAGNET EXTENDED ROLL PIN STRIKE Rev. A.3, 5/00 Page- 12 In the case of very tall and large gates, a levering problem can exist. By this we mean that an intruder may be able to flex the gate enough to take up the slack in the strike mounting screw and then lever off the strike plate. If the installer or user determines that this may happen, a single Magnalock will not provide adequate security and two must be used, typically at the top and bottom of the gate. Figure 11 (above) shows preferred special techniques for Magnalock mounting on 3 types of gates. The first drawing shows a single swinging gate. The general technique follows the principles discussed above but the use of Securitron's Z bracket which creates a neat installation is also shown. Note that in some cases, the post which mounts the magnet is hollow. It is possible to use the "F" version (without conduit fitting) and pull the wires through the post which may yield a neater and more secure installation. The second drawing shows a double swinging gate which presents a unique problem. The Magnalock is mounted in the same general way as on a single swinging gate but since both arms move, an intruder pushing on the gate exerts a shearing force on the Magnalock. Electromagnets are not at all strong in this orientation of attack. Therefore, as the drawing shows, Securitron's Z bracket should be used with an interference piece which blocks the shearing effect while the strength of the magnet blocks one arm moving while the other is stationary. For this technique to work, the motorized operator must be coordinated which means that one arm must move first to clear the interference piece before the other arm starts moving. Gate operators can normally accomplish this. The final drawing on Figure 11 shows a special mounting technique for sliding gates. We recommend the use of the "GF" type magnet and two 3" angle brackets (available from Securitron) for a neat installation. A special strike mounting technique is shown in the drawing which improves reliability. The problem is that if the strike is mounted normally to the angle bracket and the gate is a powerful one which slams shut, the magnet may be impacted to the point where its mounting screws loosen or the bracket bends. The strike mounting technique that is shown creates a "shock absorber" effect by the use of lock nuts at the rear of the strike and the rear of the bracket together with a spring. A through hole (rather than tapped) is drilled in the angle bracket mounting the strike and extra long roll pins are used. When the gate closes, the strike moves in against the spring which is the shock absorbing action. 2.7 USE OF DRESS COVERS Once the physical installation is complete, you may want to consider the use of a dress cover. Dress covers are metal stampings which slip over the magnet body and are affixed with permanent double stick tape (supplied). The dress cover accomplishes three functions: First, it makes for a more attractive installation by concealing the strike plate and mounting holes. All that is seen is an attractive rectangular form on the door. Second, the cover provides an extra degree of tamper proofing and finally it allows easy alteration of the finish for architectural compatibility. Dress covers are available in clear aluminum, satin black aluminum, polished stainless and polished brass finishes. Double dress covers are also available for installations on double doors. In this case, the cover fits over two locks so long as they are not separated by more than 2" (50mm). Double dress covers have all the advantages mentioned above and in addition produce the appearance of a single device which inside is really two. Consult the catalog for dress cover part numbers. 2.8 TAMPER PROOFING THE MAGNALOCK In situations where vandalism is expected, the Magnalock should be protected from tampering. The magnet itself is inherently tamper-proof being totally sealed. The magnet mounting screws are vulnerable in that the magnet can be dismounted if the screws are loosened. The allen holes on the screws can be filled with a potting compound, such as Devcon, or silicone. Alternately, the entire hole in the magnet where the screw heads fit could be filled. Butyrate caps are supplied to close the mounting holes. These provide some tamper proofing as they can't be removed by hand, but can be pried out with a tool. Regarding the strike plate mounting screw, it is covered by the strike when the magnet is energized. If tampering is anticipated when the door is open, the screw socket head may be filled. Another possibility is that Securitron inventories special tamper proof screws for both magnet and strike mounting. These screws are identical allen head types except that it requires a special key to install and remove the screws. It is unlikely that a vandal would have access to this type of key. Securitron optionally supplies the tamper proof screw sets with keys both in the form of a manual allen wrench and in a bit key usable with a drill. Rev. A.3, 5/00 Page- 13 3. ELECTRICAL INSTALLATION 3.1 GENERAL ELECTRICAL CHARACTERISTICS The Magnalock constitutes a low current electric load. Owing to internal circuitry, the Magnalock does not show the normal characteristics of an electromagnetic or other inductive load. Inductive kickback is suppressed, so arcing across switch contacts need not be a concern. This suppression also protects nearby access control or computer equipment from possible interference. The circuitry performs the additional functions of canceling residual magnetism ("stickiness" on release) and accelerating field collapse so that the Magnalock releases nearly instantly when power is removed. Electrically speaking, the load is nearly pure resistive in nature although there is a modest capacitive component which depends on the series. The following chart shows the current draw for each version and the degree of internal capacitance. 32 @ 12V 32 @ 24V 34 @ 12V 34 @ 24V 62 @ 12V 62 @ 24V 82 @ 12V 82 @ 24V CURRENT 300 mA 150 mA 350 mA 175 mA 250 mA 125 mA 350 mA 175 mA CAPACITANCE 0 0 0 0 30 Mfd 15 Mfd 30 Mfd 15 Mfd Capacitance can be an issue if very sensitive switch contacts are used to control the Magnalock (such as a low current reed switch). A capacitive load includes some inrush current which can stress these contacts. Note however that the problem is diminished when the Magnalock is mounted some distance from the control switch as the interconnecting wiring adds a series resistance to the circuit which sharply limits the inrush. 3.2 STANDARD LOCK For operation, DC voltage must be provided to the lock. The red wire receives +12VDC or +24VDC, and the black wire, 0V (negative). If the lock is connected with reverse polarity, it will not function at all. The voltage source may be regulated, filtered or pulsating DC (transformer + bridge rectifier). Half wave pulsating DC generated by a transformer and single diode will not properly operate the Magnalock. An exact voltage level is not necessary. Less than standard voltage will proportionately reduce holding force but will cause no harm. Overvoltage up to 30% is acceptable. The model 34, 62 and 82 series Magnalocks are dual voltage units. This means that you can apply either 12 or 24 volts to the same unit and it will operate equally well. Dual voltage Magnalocks are auto-switching which means that you still apply power to the red and black wires, while observing correct polarity. The lock, however, automatically detects whether it is receiving 12 or 24 volts and draws the correct amount of current for that voltage (the current is twice as high when the lock is receiving 12 volts than when it is receiving 24 volts). The model 32 series has separate models for 12 and 24 volt operation. It is good practice to use power supplies with 1/3 extra capacity beyond the current requirements of the load. This greatly reduces the possibility of heat induced power supply failure and also allows for future expansion. Power supply cost is a small fraction of the job cost and should not be skimped on. Switches may be wired as necessary between the Magnalock and power source. Internal circuitry eliminates inductive kickback, so neither electromechanical switches nor solid state devices will be damaged by arcing when the Magnalock is shut off. 3.3 AVOIDING POOR RELEASE CHARACTERISTICS One of the exceptional features of Magnalocks is near instantaneous release. This is particularly valuable when the lock is being switched off and the door is being opened at the same time as occurs when a switched exit device like Securitron’s Touch Sense Bar is being used. Two separate wiring errors can however cause Magnalocks to release slowly (in one or two seconds) and this is annoying. The first problem is connection of a reverse diode in parallel with the lock's power input. This is often done to suppress inductive kickback from a coil such as a relay coil or solenoid. Magnalocks already have internal inductive kickback protection, so addition of a reverse diode is pointless. The diode does act to "recirculate" current flow through the magnet coil and thereby considerably slows release. A diode should never be connected as shown in Figure 12. Rev. A.3, 5/00 Page- 14 The second problem is when any load is operated in parallel with the Magnalock. A good example would be adding an incandescent lamp in parallel with the lock so that the lamp would be illuminated when the lock is powered. The lamp acts like a resistor and allows current recirculation which will greatly slow lock release time. When you want to add a resistive load in parallel with the lock, you must put a forward diode in series with the resistive load. This will block recirculation and restore quick release. Correct practice is shown in Figure 12 below. A special case exists when you use an LED connected in parallel with the Magnalock (to show that the Magnalock is on for example). This does not slow release as the LED does not allow recirculation but the limited recirculation energy will eventually burn out the LED. LED’s are susceptible to even a tiny amount of reverse voltage. Therefore add the forward diode as you would with an incandescent lamp (see Figure 12) to extend the life of the LED. FIG. 12: WIRING CONSIDERATIONS TO AVOID SLOW RELEASE RED RED MAGNALOCK MAGNALOCK BLACK BLACK NEVER CONNECT PARALLEL REVERSE DIODE AS SHOWN USE A FORWARD DIODE WITH ANY PARALLEL RESISTIVE LOAD SUCH AS A LAMP 3.4 WIRE GAUGE SIZING If the power supply is distant from the lock, voltage will be lost (dropped) in the connecting wires so that the Magnalock will not receive full voltage. The following chart shows the minimum wire gauge that will hold voltage drop to an acceptable 5% for different lock to power supply distances. Proper use of the chart assumes a dedicated pair of wires to power each Magnalock (no common negative). Note that a Magnalock operating on 24 volts is a much better choice for long wire runs as it has 4 times the resistance of a 12 volt installation. Also note that the correct calculation of wire sizing is a very important issue as the installer is responsible to insure that adequate voltage is supplied to any load. In multiple device installations, the calculation can become quite complex so refer to Appendix B for a more complete discussion. Distance Gauge 12V Gauge 24V Distance Gauge 12V Gauge 24V 80 FT 20 GA 24 GA 800 FT 10 GA 16 GA 200 FT 17 GA 22 GA 1500 FT. 8 GA 14 GA 400 FT 14 GA 20 GA 3000 FT N/A 12 GA 3.5 SENSTAT MAGNALOCKS: “SC” Securitron's optional patented Senstat feature provides true lock status sensing. In many electrically controlled door security systems, status sensing is provided by a magnetic switch on the door itself. This indicates the door is closed but not necessarily secured. Securitron's Senstat monitors the lock rather than the door and therefore provides higher security (but note that it can’t be used as an auto-relock input to an access control system). An “SC” Magnalock provides a dry SPDT output which changes state when the lock is reporting secure (1 Amp @ 30 VDC maximum). This is accomplished by conducting the input power of the lock through the strike and employing it to energize an internal SPDT relay. The white wire is the Senstat relay common. Green is closed to white when the lock is secure and Orange is closed to white when the lock is not secure. Rev. A.3, 5/00 Page- 15 FIG. 13: “SC” SENSTAT WIRING BLK POWER SUPPLY ORANGE GREEN "SC" LOCK RED WHITE + WHITE AND GREEN WIRES PROVIDE ISOLATED CLOSURE WHEN LOCK IS SECURE. ORANGE AND WHITE ARE CLOSED WHEN LOCK IS NOT SECURE (AS SHOWN ABOVE). 3.6 DOUBLE DOOR PROCEDURE FOR STATUS REPORTING Often two Magnalocks are mounted on a double door and are turned on and off together (no separate control). As to status reporting, it is of course possible to receive a separate Senstat status signal from each door or you can combine the outputs so that if both locks are secure, the double door is secure and if either lock is not secure, the double door is not secure. Simply tie the two white wires together from the two locks. A circuit will be closed between the two green wires only when both locks are reporting secure. If either is not secure, the circuit between the two green wires will be open. The orange wires are not used. See Figure 14. FIG. 14: DOUBLE DOOR WIRING WITH "SC" LOCKS GREEN "SC" LOCK WHITE GREEN "SC" LOCK WHITE "SC" LOCKS ARE INTERWIRED AS SHOWN TO PROVIDE STATUS MONITORING. AN ISOLATED CLOSURE WILL EXIST BETWEEN THE GREEN WIRES ONLY IF BOTH LOCKS ARE SECURE. 3.7 DOUBLE DOOR CONTROL SWITCHING It’s common to control two locks from a single access and/or exit switch on double doors or on an installation where two locks are mounted on a single door. In nearly all cases, this works with no problem but occasionally the release can appear to be “sticky” for similar reasons to those discussed in Section 3.3 This happens when one of the locks is poorly coupled to its strike plate. This could occur because of an installation problem (the strike plate is not being allowed to swivel) or because of some obstruction between the plate and magnet surface. When an electromagnet is not well coupled to its strike plate, its magnetic field collapses so rapidly that it provides some energy to recirculate in the second magnetic lock, slowing the release of that lock. FIG. 14: DOUBLE POLE SWITCHING OF TWO LOCK INSTALLATION TWO POLE SWITCH + POWER SUPPLY RED MAGNALOCK #1 BLK RED MAGNALOCK #2 BLK Rev. A.3, 5/00 Page- 16 So if you notice slow release on a double lock installation, this is telling you that one of the locks is not holding properly and that the problem should be corrected. Alternately, any chance of slow release can be eliminated by controlling the two locks with a double pole switch or relay. This blocks the recirculation path and is shown in Figure 15. 3.8 EMERGENCY RELEASE Magnalocks are often wired into a system such that they can be released in an emergency -either manually from one switch or automatically, often from the fire alarm system. It is the user's responsibility to accomplish this hookup correctly according to these instructions and good electrical practices. In general, we recommend that a switch or relay be used to perform a series break of all DC power which is the simple and sure way to make sure the doors do release. Securitron power supplies have terminals for interconnection of such emergency release switches. Finally please note that it is the responsibility of the end user and dealer/installer to insure that Magnalock installations comply with any applicable fire or building codes. MAGNACARE LIMITED LIFETIME WARRANTY SECURITRON MAGNALOCK CORPORATION warrants that it will replace at customer’s request, at any time for any reason, products manufactured and branded by SECURITRON. SECURITRON will use its best efforts to ship a replacement product by next day air freight at no cost to the customer within 24 hours of SECURITRON’s receipt of the product from customer. If the customer has an account with SECURITRON or a valid credit card, the customer may order an advance replacement product, whereby SECURITRON will charge the customer’s account for the price of the product plus next day air freight, and will credit back to the customer the full amount of the charge, including outbound freight, upon SECURITRON’s receipt of the original product from the customer. SECURITRON’s sole and exclusive liability, and customer’s sole remedy, is limited to the replacement of the SECURITRON product when delivered to SECURITRON’s facility (freight and insurance charges prepaid by customer). The replacement, at SECURITRON’s sole option, may be the identical item or a newer unit which serves as a functional replacement. In the event that the product type has become obsolete in SECURITRON’s product line, this MAGNACARE warranty will not apply. This MAGNACARE warranty also does not apply to custom, built to order, or non-catalog items, items made by others (such as batteries), returns for payment, distributor stock reductions, returns seeking replacement with anything other than the identical product, or products installed outside of the United States or Canada. This MAGNACARE warranty also does not apply to removal or installation costs. SECURITRON will not be liable to the purchaser, the customer or anyone else for incidental or consequential damages arising from any defect in, or malfunction of, its products. SECURITRON does not assume any responsibility for damage or injury to person or property due to improper care, storage, handling, abuse, misuse, or an act of God. EXCEPT AS STATED ABOVE, SECURITRON MAKES NO WARRANTIES, EITHER EXPRESS OR IMPLIED, AS TO ANY MATTER WHATSOEVER, INCLUDING WITHOUT LIMITATION THE CONDITION OF ITS PRODUCTS, THEIR MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. PATENTS Securitron’s Magnalock is covered under U.S. patents #4,516,114 and 4,682,801. Rev. A.3, 5/00 Page- i APPENDIX A TROUBLESHOOTING PROBLEM -- No magnetic attraction between magnet and strike plate. First be sure the lock is being correctly powered with DC voltage. This includes connecting the power wires with correct polarity. Positive must go to red and negative to black. If the Magnalock is wired in reverse polarity, it will not be damaged, but it will not operate. If the unit continues to appear dead, it must be electrically checked with an Ammeter. It must be powered with the correct input voltage and checked to see if it draws the specified current. If the unit meters correctly, it is putting out the correct magnetic field and the problem must lie in the mounting of the strike (see next paragraph). Section 3.1 includes a chart showing current draw for all Magnalock versions. PROBLEM -- Reduced holding force. This problem usually expresses itself in terms of being able to kick the door open or to open it with a shoulder. Check the strike and magnet face to see if some small obstruction is interfering with a flat fit. Even a small air gap can greatly reduce the holding force. Another possibility is if the strike plate has a dent on it from being dropped for example. Remove the strike from the door and try to rock it on the magnet face to insure it is flat. If the strike and magnet are flat and clean, the cause is nearly always improper mounting of the strike in that the strike is mounted too rigidly. The strike must be allowed to float around the rubber washer stack which must be on the strike center mounting screw. The magnet then pulls it into flat alignment. To correct the problem, try loosening the strike mounting screw to see if the lock then holds properly. Another possibility is if you are operating the lock on AC instead of DC or on half wave rectified DC (transformer + single diode). Half wave rectified DC is unacceptable; you must, at a minimum employ full wave rectified DC (transformer + bridge). PROBLEM -- The Senstat output does not report secure. Because of the simplicity of Securitron's patented Senstat design, this is almost always a case of the lock status sensor doing its job. It is not reporting secure because a small obstruction or too stiffly mounted strike is causing the Magnalock to hold at reduced force. The problem is corrected by cleaning the surfaces of the magnet and strike or establishing proper play in the strike mounting. If this doesn't work, you can verify function of the Senstat feature as follows. Note that there are 2 thin vertical lines on the magnet face that can be said to separate the core into 3 sections from left to right. The Senstat output is created by the strike establishing electrical contact between the leftmost and rightmost core segments. With the lock powered, use a pair of scissors and press the points respectively into the leftmost and rightmost core segments. The Senstat output should then report secure. This shows that the problem lies in the strike not making correct flat contact with the magnet face. If the scissors technique doesn't cause the lock to report secure, check to see if there is a broken Senstat wire. If this is not the case, the lock must be returned to the factory for replacement. PROBLEM -- The lock does not release. When power is removed from it, the Magnalock must release. If internal circuitry, which eliminates residual magnetism, were to fail completely, the lock would only exhibit "stickiness" at a rough level of 5 pounds. Therefore the complaint of "lock will not release" is either mechanical bonding via vandalism or a failure to completely release power. By mechanical bonding, we simply mean that glue has been applied between the strike and magnet as a prank. Failure to completely release power is generally a wiring integrity problem. What happens is that an upstream switch removes power from the wires going to the Magnalock, but through an installation error, the wires have their insulation abraded between the switch and lock so that partial or full power can leak in from another Magnalock or other DC device with similarly abraded wiring. This is most likely to occur at the point where the wire cable leaves the lock case and enters the door frame. Another area is via an improper splice on wiring in conduit. Either a metal door frame or the metal conduit is capable of leaking power between multiple devices with abraded wires, thereby bypassing switches. A good way to check this electrically (as opposed to visually removing and inspecting the wires) is to use a meter and check for leakage between the power supply positive or negative and the door frame and conduit. Magnalocks should be powered by isolated DC voltage without any earth ground reference to positive or negative. Note that two types of wiring errors can cause slow release. Review Section 3.3 to see if you are making either of these errors. PROBLEM -- The lock rusts Both the Magnalock core and strike plate are plated and sealed following a military specification. Because of this plating and the sealed nature of the magnet, the Magnalock is weatherproof and may be used outdoors. If rusting appears, the most common cause is that improper cleaning (with steel wool for instance) has occurred and this has stripped off the relatively soft plating. Once the plating has been removed, it cannot be restored in the field, so the lock will have to be periodically cleaned and coated with oil or other rust inhibitor. A rusty Magnalock will still function but at reduced holding force. If the product is installed in a heavily corrosive atmosphere, such as near the ocean, it will eventually rust even with non abrasive cleaning. The only answer then becomes continued periodic removal of the rust. Rev. A.3, 5/00 Page- ii PROBLEM -- Apparent electronic noise interference with the access control system. Electric locks, being inductive devices, return voltage spikes on their power wires and also emit microwave radiation when switched. This can interfere with access control electronics causing malfunctions. Access control contractors often employ installation techniques designed to isolate the access control electronics from the electric lock. These include separate circuits for the lock, shielded wiring and other techniques. These techniques will vary with the sensitivity of the access control system electronics and should, of course, be followed. Note that Magnalocks include internal electronics which suppress both inductive kickback and radiation. They have been extensively tested and accepted by numerous access control manufacturers and have been used in thousands of installations without incident. An apparent noise problem is therefore usually not caused by the Magnalock. The access control equipment may be itself faulty or have been installed improperly. One problem can arise with the Magnalock. If the Senstat version is being used, the strike plate (which passes current) must be isolated from a metal door and frame. Securitron supplies insulating hardware to accomplish this but the hardware might not have been used or the strike may be scraping against the header for instance. Check for full isolation between the strike and the door frame (when the door is secure) with an Ohmmeter. The presence of lock voltage potential in the door frame can interfere with the ground reference of access control system data communication and therefore cause a problem. IF YOUR PROBLEM PERSISTS CALL SECURITRON TOLL FREE 1-800-MAG-LOCK APPENDIX B CALCULATING WIRE GAUGE SIZING The general practice of wire sizing in a DC circuit is to avoid causing voltage drops in connecting wires which reduce the voltage available to operate the device. As Magnalocks are very low power devices, they can be operated long distances from their power source. For any job that includes long wire runs, the installer must be able to calculate the correct gauge of wire to avoid excessive voltage drops. This is done by adding the resistance of the Magnalock to the resistance in the power wires and then dividing the wire resistance by the total resistance. This yields the fraction of voltage drop in the wires. For example, a single model 62 Magnalock has a resistance of 192 ohms when being operated on 24 volts. If the wires completing the circuit between the Magnalock and its power source have a resistance of 10 ohms, the total resistance is 202 Ohms. Dividing 10 Ohms (the wire resistance) by 202 (the total resistance) yields roughly 1/20 or 5%. If the input voltage is 24 volts, 5% of this voltage will be dropped in the wires (1.2 volts) leaving 22.8 volts to operate the Magnalock. This will cause a small reduction in holding force but in general, will be acceptable. To calculate the wire resistance, you need to know the distance from the power supply to the Magnalock and the gauge (thickness) of the wire. The following chart shows wire resistance per 1000 ft (305 meters): Wire Gauge Resistance/1,000 ft Wire Gauge Resistance/1,000 ft 8 Gauge 10 Gauge 12 Gauge 14 Gauge .6 Ohms 1.0 Ohms 1.6 Ohms 2.5 Ohms 16 Gauge 18 Gauge 20 Gauge 22 Gauge 4.1 Ohms 6.4 Ohms 10.1 Ohms 16.0 Ohms Model 32 resistances are 160 Ohms for the 24 VDC version and 40 Ohms for the 12 VDC version. Model 34 resistances are 136 Ohms for 24 VDC operation and 34 Ohms for 12 VDC operation. Model 62 resistances are 192 Ohms for 24 VDC operation and 48 Ohms for 12 VDC operation. Model 82 resistances are 136 Ohms for 24 VDC operation and 34 Ohms for 12 VDC operation. Let's look at some other sample calculations. Suppose a single 62 Magnalock operating on 24 volts is 1200 ft from its power supply and we're using 20 gauge wire. First, the total length of the power wires is 2400 ft. Remember that you combine the wire lengths from the power supply to the lock and back to the power supply to get the total circuit wire length. The wire resistance than becomes 2.4 X 10.1 Ohms which is 24.2 Ohms. Adding this to the Model 62 Magnalock resistance of 192 Ohms (at 24 volts) yields a total resistance of 216.2 Ohms. 24.2 divided by 216.2 yields the percent drop in the wires which is over 11% which we would consider excessive. The problem can be dealt with in 2 ways. You can utilize 16 gauge wire which would reduce the drop to a more acceptable 5% range or you can provide extra voltage at the power supply. For instance, Securitron 24 V power supplies are adjustable from 24 to 28 volts. You can therefore easily set the power supply to output 11% overvoltage which will then deliver 24 volts at the lock. The Magnalock will accept up to 30% overvoltage without ill effects. Rev. A.3, 5/00 Page- iii Note that a Magnalock operating on 12 volts has 1/4th the resistance of a unit operating on 24 VDC. This means that wire voltage drops are 4 times more significant in a 12 volt system than in a 24 volt system. In any job that has wire runs long enough to be of concern, always use 24 volts. Note also that it's common to mount 2 Magnalocks on a double door and operate them as one lock (only 2 power wires). In this case, the resistance of the pair of locks is half the resistance of a single lock. In multiple lock jobs with a single power supply, the calculation of wiring voltage drops is more difficult. So long as you run a separate pair of power wires to each lock, the calculation is as simple as has been described above, but if a common power wire is used in a loop structure, the locks powered by the single loop will have an increasingly low combined resistance so that the loop wire resistance will become more significant to the point where the locks don't receive enough voltage. To find the combined resistance of multiple locks powered by a common wire, divide the resistance of one lock by the number of locks. For example, eight 62 Magnalocks operating on 24 volts would have a combined resistance of 192 divided by 8 which is only 24 Ohms. Another method is to calculate the current in Amps in the wire and divide that into the circuit voltage. Since each 62- Magnalock operating on 24 volts draws 1/8th of an Amp, eight would draw 1 Amp. Dividing this into the same 24 volt input voltage yields a 24 Ohm combined resistance. In general, you have to be cautious about using common wires for loads in long distance situations unless you're very confident about your ability to calculate the correct configuration. Bear in mind, however, that anytime you're uncertain about the voltage drop in wiring, you can meter the voltage at the lock while it's connected and you will be able to see if it's receiving adequate voltage. If the lock is not connected when you make this measurement, the result will be false as the circuit will not see any lock resistance to compare to the wire resistance. You will read the full input voltage. APPENDIX C CONSIDERATIONS FOR MAXIMUM PHYSICAL SECURITY Magnalocks carries rated holding forces of 600 lbs. (275 Kg.), 1200 lbs. (550 Kg.) and 1800 lbs. (815 Kg.) for respectively the model 32/34, 62 and 82. The figures are derived by using a calibrated hydraulic press to separate the magnet and strike. The installer and user, however, are logically most interested in how Magnalocks perform on a door rather than on a laboratory instrument and there are several installation and application variables that affect the security level attained while using the Magnalock. First, to achieve the rated holding force, the magnet face and strike plate must be clean. Even a small amount of contamination will materially reduce the holding force. If cleaning is necessary, avoid the use of a heavy abrasive such as steel wool which can remove the plating on the magnet face and strike. A sponge or plastic pad such as Scotchbrite must be used. Another requirement for maximum holding is that the strike plate must be centered on the magnet face and must cover the magnetic core (3 bars). As is said in other parts of these instructions, the strike plate must be allowed to swivel around the washer stack placed on the center strike mounting screw (not on the roll pins). Assuming the magnet and strike are clean and are mounted in good alignment, the Magnalock will deliver its rated degree of holding force on the door and the question becomes how much security does that provide on different door types? In furnishing the answer we have to consider both the door construction and the likely type of attack. In the case of wooden doors (other than solid hardwoods), aluminum frame glass doors, and hollow aluminum doors, the model 32 or 34 should be employed in a “traffic control” mode. This means that a determined assault on the door can “pop” these models open. The model 62 or model 82 Magnalock is generally stronger than the door itself. Users have logged periodic cases of an assault destroying the door but leaving the Magnalock intact and still holding a piece of the door. This raises the question of whether it ever makes sense to install the model 82 Magnalock on non-steel doors since the model 62 is stronger than the door. Justification for using the model 82 lies in margin for error. The greater strength of the model 82 can compensate for a dirt build-up or improper installation and this may be warranted for the protection of critical areas. Steel clad fire doors or solid steel door such as are sometimes found in prisons, are generally stronger than the model 62 Magnalock so the use of the model 82 Magnalock can provide extra security for critical applications on steel doors. In looking at methods of attack, the first point that must be made is that it is far more effective to force the attacker to pull the door open rather than to allow him to push it. This is controlled by whether the door swings away from or in to the protected area with the former being preferred. If the attacker can be forced to pull the door, it is much more difficult for him to generate the requisite amount of force to defeat any of the Magnalock versions. A crowbar may be used to try to pry open the door. At first, this seems to be a major worry as a long crow bar can develop high force through leverage. In fact, what generally occurs is that the door experiences material failure. The crowbar tears (in the case of wood) or bends (in the case of metal) the door material without defeating the lock. Another factor that underlines the superiority of the Magnalock as regards physical security is that many attackers will not be familiar with it. Expecting a conventional lock which secures between the door and frame, the attacker Rev. A.3, 5/00 Page- iv will employ the crowbar in an attempt to spread the door edge from the frame to clear the securing latch rather than to pry the door open against the strength of the Magnalock. Electric strikes, however well made, can be comparatively easily defeated with a crowbar by the tactic of spreading the door and this is why they should be considered low security devices. The general fact that the Magnalock mounts on the other side of the door from the attacker is an important contributor to its strong resistance to assault. If the door must open in to the protected area, the attacker will have an opportunity to charge the door, kick it, or hit it with an object. This is a less secure configuration, but Magnalocks never the less resist violent attacks of this type. It is naturally important to use the strongest model Magnalock for the best security in this situation but the ability of an attacker to defeat a Magnalock secured door that swings into the protected area is highly dependent on the door type and mounting location of the lock on the door. The key factor is that the door should be able to give when it receives a blow, thereby absorbing the force of the blow, rather than transmitting that force to the lock. In more technical terms, the momentum of an object striking the door will generate momentary force at the lock as a direct function of the deceleration of the arriving object. If the object decelerates abruptly, because the door is very stiff, it will generate a large force. Slow deceleration, as the door gives with the arriving object, generates a relatively small force at the lock. Once the above paragraph is understood, we can conclude that the best place to mount the Magnalock on an inswinging door is at the top of the door/header. In fact this is best place to mount any lock on an inswinging door. Most people prefer to mount at the middle of the door as it gives a feeling of security when one shakes the door from the doorknob. This however is an illusion. If a strong kick is struck right at the lock, the power of the kick is transmitted nearly directly to the lock and there is a good chance of defeating the lock or its mounting. If the lock is at the top of the door, a kick at the door center, causes the door to flex which absorbs most of the force of the blow. The concept of preferring a door that gives, also affects the issue of physical security on different door types. Oddly enough the characteristics that make an inswinging door strong, can make it more difficult to lock if it is stiff. Steel doors and most particularly solid steel doors such as may be found in prisons, transmit blows much more effectively to the lock and as such may be defeated by repeated leg blows or by charging the door. If the end user has such doors and has as well a security environment where determined attacks can be foreseen on the doors, it is his responsibility to insure that the Magnalock's strength is adequate for the application. Selection of the model 82 is strongly recommended with another technique being the use of multiple locks. For critical applications on stiff doors which swing in to the protected area, Securitron offers a component that counteracts the stiffness of the door. This is the energy absorbing sex bolt (model EASB). Larger in diameter than the standard sex bolt, the EASB incorporates a powerful internal spring which flexes to absorb the force of a blow and thereby substantially increases the security of the installation. As a final matter, be aware that the fasteners and mounting technique are just as important to successful physical security as the strength of the lock. The fasteners must also naturally be employed on a frame area of sufficient solidity so that it will not come loose in an attack. The Magnalock has been carefully designed to install with supplied fasteners that substantially exceed the lock strength. If the installer replaces the factory supplied fasteners for any reason, the success of the installation is in question. Turning to the details of Securitron's fasteners, first note the sex bolt. This is a key component as the head of the sex bolt is the only part of the entire lock assembly that is accessible to an attacker. Securitron's sex bolt is both large (1 1/4" dia. head) and is manufactured from steel. Small commercially available sex bolts exist fabricated from both aluminum and brass. The use of such a component destroys the security of the installation as the bolt head can be sheared with a chisel by an intruder. It is also vital to mount the magnet with the supplied machine screws into the steel blind nuts. An alternate technique is to use sheet metal screws which some installers feel is easier. This is extremely ill advised as the magnet receives a torquing force each time the door is closed which will work the sheet metal screws free in time. We have determined that sheet metal screws can be considered acceptable, although not preferred, if the header is made of steel. Indeed this is mandated when Securitron's concrete header bracket is used. On an aluminum header, however, sheet metal screw mounting is dangerous as the steel screw threads will gradually tear through the relatively soft aluminum. To fully complete an installation that maximizes the effectiveness of the fasteners, Threadlock (supplied) should be used to defend the threads against loosening over time and please refer to section 2.8 on tamper proofing for applications where vandalism can be expected.