Dp 139 en

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Access control systems[edit]

Author: Bajer Jiří

Diplomové práce 2004

The thesis gives a brief introduction into access control systems and demonstrates the basic principles on a particular unit. The result of the work is design of circuitry and firmware of an electromotoric lock controller unit with assembly and user documentation included. The controller unit is based on microprocessor PIC 16F877, has galvanic--isolated inputs and outputs and may be used either stand--alone or as a part of complex system. Exchange of data is done via RS 485 bus using own text--oriented protocol on ISO OSI session layer. Desing of the protocol is included aswell.