Most access control articles discuss the installation of access control systems from the point of view of having already chosen the equipment. For this article, I decided to find an opening needing to be controlled electronically, prior to the decision making process. With the cooperation of...
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In addition, if a component of the EmLock needs replacement, the entire magnetic lock does not need to be replaced. The EmLock has been designed to permit removal and replacement of most electronic components without having to replace the unit itself.
Before choosing a magnetic lock, look for the proper listing and performance specifications. To ensure minimum product quality and performance capability, the American National Standards Institute (ANSI) has adopted construction and performance standards established by the Builders Hardware Manufacturers Association (B.H.M.A.). All electromagnetic door locks must comply with several mechanical, electrical and holding force requirements according to ANSI A156.23. These performance standards also place electromagnetic door locks in three categories. SDC recommends using an ANSI Grade 1 magnetic lock as the cycle test requirement is one million, twice that of the Grade 2.
Make sure the magnetic lock is B.H.M.A. Certified. This indicates that the magnetic door lock has passed an independent pull test and a dynamic impact test for holding force and complies with all ANSI and B.H.M.A. performance criteria. This is the only certification in the industry that verifies a manufacturers' magnetic door locks holding force and ANSI compliance.
In addition, make sure the magnetic lock is listed by a reputable testing agency. This can include Underwriters Laboratory, Warnock Hersey, etc. The listings confirm the magnetic lock is safe and that it has been tested for the purpose the product was intended. As an example, minimum UL Listings for magnetic locks should include:
UL Listed: Builders Hardware and Auxiliary Lock is only required for labeled door. Although this listing is not required for this installation, we decided to include it as a future consideration for informational purposes when you do come across a labeled opening.
UL 10B Listed: Burglary Resistant Electrically Operated Door Lock. This listing indicates that UL has performed a physical attack test and the lock has passed. Look for this listing on all locks over 1200 Lbs holding force.
UL 10C “Positive Pressure Compliant” and Classified in accordance with Uniform Building Code U.B.C. “Fire Test for Door Assemblies.” This classification verifies the lock does not have negative impact on the integrity of fire rated openings. UL 10C is only required for labeled door. Although this listing is not required for this installation, we decided to include this listing as a future consideration for informational purposes when you do come across a labeled opening.
Sample City and State Listings include California State Fire Marshal and New York City. The California State Fire Marshal Listing is required for California installations. The City of New York building department Materials & Equipment Acceptance Division, MEA Listing is required for NYC installations. See the CSFM Mark example. The State of California is known as consistently setting fire life safety trends and having the most stringent code requirements in the world.
By determining the number of users, the type of credential(s) desired, and the need for audit trail, Security Door Controls recommends for this application, the SDC 950 EntryCheck™ single-door controller. This combination keypad and proximity reader is weather resistant. The SDC 950 self-contained, standalone single or dual credential reader comes standard with 10 prox cards or prox key fobs. The proximity cards use the 40 bit Wiegand format.
The SDC 950 EntryCheck can retain up to 500 cards and/or Personal Identification Codes (PIN) in non-volatile memory. The unit has three entry mode choices. They are card only, PIN Code or card, or Card and PIN Code. To restrict against unauthorized access, the SDC 950 EntryCheck has a tamper alarm with reader and PIN lockout.
All programming is accomplished at the unit using the Master code (keypad) or the programming (proximity) card. The EntryCheck has LED and audible tone that indicate programming procedures. The unlock time is adjustable; it can be set for 1-99 seconds. A time adjustable auxiliary output is included.
Electromagnetic locks are sometimes regarded as an “idiot-proof locking solution” for unskilled installers or for use on problem doors.