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Personnel Access Controls

Card Access Control System


The most prevalent system configuration is the "Distributive Network." In a distributive network, the card reader (read head) is connected to a control panel which makes all of the decisions concerning a card read. Each control panel supports one or more read heads. The first control panel is connected to each successive control panel and eventually to a personal computer. Each control panel has relays to actuate the door locking devices and monitor the door contact switches. In the event of a loss of communications or the failure of the central computer, the control panel continues to make all of the necessary decision.

The personal computer is used to program the control panels and to store the transaction stream of the activities occuring at each door. The software program provides a database for each cardholder with information such as name, department, and social security number. The transaction stream (history file) can be sorted and searched according to several criteria such as cardholder number, door number, name of cardholder, and time and date.

Telephone modems and internet connections can be used to control panels located off-site.

Control Panel
A fully intelligent microprocessor with its own clock/calendar. All decisions concerning a card read are made at this panel. Each control panel supports one or more readers, has an 8,000 card capacity, output relays to actuate the door locking hardware, monitoring inputs for door open/closed, and request - to-exit from a secured area.

The control panel can be programmed to automatically unlock doors for specific periods of time on specific days and has a holiday schedule.

Cards can be programmed to be valid only during certain time periods and can be invalidated at any time. Programming of the control panel is done from the personal computer and has a transaction stream which is sent from the control panel to the central computer to be stored in a history file.

The door strike outputs energize or de-energize the electric door strikes or locking devices.

Card read technologies include: proximity, magnetic stripe, wiegand, and bar code. Photo ID badges are also available. Digital keypads may also be used.
Proximity Readers



The proximity read head is an electronic device continuously transmitting a low powered R/F Signal which is reflected back to the read head by a tuned circuit in the proximity card. Each card is tuned to create a unique ID number. The card is "Presented" within several inches of the read head. Proximity reader/keypad combination units can be used when a PIN number is required after presenting a card.

Personal Computer & Software
The software is loaded into a standard IBM compatible personal computer and provides a database of information about each cardholder and the tables which define the schedules of automatic door opening times, the holidays, and the definition of the monitoring input points and output relays. A history file of all activities is generated and can be later searched and printed. After changes are made to the software program the information in the control panel(s) is updated.

The software has different passwords for different levels of authority; therefore a security officer could acknowledge alarm conditions, but might not have the authority to enter or delete cardholder information.


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