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What is Access Control?

Access control is the control and management of people, vehicles and goods to and from access points like, computers, gates, doors, environments etc. A very common form of access control we come across everyday is the use of intercom systems, and the control boom to a parking lot.

Benefits of Access Control
" Increases corporate awareness to safety, health, IT and HR 
" Delivers comprehensive protection by recoding all identity-based activities 
" Reduces exposure to loss and liability 
" Protects every part of the business by complete control of physical and logical access 
" Monitoring of employee productivity

Types of Access Control Equipment
Code Based access systems
A secure pin code entered onto a touch pad/screen is required, before Access to a controlled area is allowed.
Proximity access control
Proximity access control systems use cards or tags that are presented to readers to operate the access control. The card or tag does not need to make direct contact with the reader but must normally be placed within 5cm to 10cm of the reader. Proximity cards come in a variety of sizes but most modern systems use a card the same size and thickness as a credit card. Proximity tags can be clipped to key rings and can provide a more convenient and robust method of operating the access control reader.

Access Control Technologies
Access Control requires four basic technologies for effective functioning. These consist of:
" A PC (personal computer) for overall system control 
" input devices - devices that detect conditions or events (not specifically connected to a door) e.g. temperature monitors, motion detectors, panic buttons and glass break detectors) 
" Access Control doors and related peripherals, including door contact switches, card readers and keypads, and locking devices 
" output devices - items that respond to the input devices

Magnetic lock

A magnetic lock is a simple locking device that consists of an electromagnet and armature plate. By attaching the electromagnet to the door frame and the armature plate to the door, a current passing through the electromagnet attracts the armature plate holding the door shut. Unlike an electric strike a magnetic lock has no interconnecting parts and is therefore not suitable for high security applications because it is possible to bypass the lock by disrupting the power supply. Nevertheless, the strength of today's magnetic locks compares well with that of conventional door locks and they cost less than conventional light bulbs to operate

The magnetic lock relies upon some of the basic concepts of electromagnetism. Essentially it consists of an electromagnet attracting a conductor with a force sufficiently large enough to prevent the door from being opened. In more detailed examination, the device makes use of the fact that a current through one or more loops of wire (known as a solenoid) produces a magnetic field. This works in free space, but if the solenoid is wrapped around a ferromagnetic core such as soft iron the effect of the field is greatly amplified. This is because the internal magnetic domains of the material align with each other to greatly enhance the magnetic flux density