Designing an access control system can be a daunting task, especially if the system required is substantially larger than what is already in place. But if you approach it methodically, you can reduce error and ensure that you get the exact system needed for your facility. Assess the Situation Observe Your Environment Conduct a Site […]
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Hand geometry recognition systems are commonly available in two forms: full hand geometry systems that measure the entire hand, and finger geometry systems that measure only the index and middle fingers. Hand and finger geometry biometrics are automated measurements of hand and finger dimensions taken from a three dimensional image. A reader or camera captures
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Access control systems using the contact smart card can be employed in high-security applications which involve large numbers of people that require significant flexibility and layering, but need only moderate throughput rates. These systems are replacing many of the key card and magnetic stripe systems due to their ease of use, security, and reliability. Homeland
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Door position monitoring devices provide status of a door (door is ope n or closed) to the access control system, allowing it to engage locks, annunciate alarm conditions, and other actions that provide security. For example, an authorized user ma y access a door and pr op it op en, allowing the unauthorizedd entry of
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access control Barriers devices control vehicular access to specified areas while providing various levels of security to the facility. Barriers generally protect and control vehicular entry points by allowing only authorized vehicles. Many styles of barriers are available, such as wedge or drop arm barriers as well as ornate gates and planters. Retractable or removable
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Bollard limit vehicular access to specified areas while providing various levels of security to facilities and pedestrians. Bollards allow unimpeded pedestrian passage, unlike barriers.Bollards come in a number of styles and provide different levels of security with a variety of aesthetic characteristics. Retractable or removable bollards are available for situations requiring only occasional access for
All of the components in an electrical system are designed to operate at their rated voltages for optimum efficiency and long service. An ideal electrical system would provide constant voltage to all customers under all conditions of load. Unfortunately, because of the unpredictable dynamics of a practical system, none is ideal. Thus, it is necessary
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Landscape lighting can dramatically affect the look of a home and property, not to mention the additional safety and security that it provides. There are four basic steps in landscape lighting: What to light? Choosing landscape lighting systems (12 volt or 120 volt) Landscape lighting techniques Landscape lighting plans Step 1: What to Light? Examine
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The single-pole, wall-mounted toggle switch, as shown in below Figure , is the most commonly used switch in homes and offices. These wall switch wiring diagrams have the two brass screw terminals on the right side of the switch for the connection of black “hot” wires. It makes no difference which “hot” wire (input or
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NEC 2002, Article 314, “Outlet, Device, Pull, and Junction Boxes; Conduit Bodies; Fittings; and Manholes,” requires that wire connections or cable splices be contained inside approved metal or plastic boxes. This provision is intended to shield wood building framing members or other adjacent flammable objects from electrical sparks should the wiring be defective. Boxes also