1. Introduction
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1. Introduction
1.1. Intended use
Components secured with PINs can only be operated if a
valid PIN code has been entered into the keypad. The elec-
tronics ensure that the door can only be opened after a valid
PIN code has been entered.
1.2. Opening types
Six different code types with different functions are avail-
Code types, their function and programming
able (see
[} 18]
).
1.3. Programming
A total of 126 different PIN codes can be programmed into
the door terminal. The number combination concerned can
between 3 and 8 digits long. The opening function that a
code should have is specified during programming. New
codes are entered in what are known as programming
mode. Programming mode is secured by a programming
code.
1.4. Security
The terminal is blocked if an incorrect code is entered three
times in succession. Codes can only be entered again if no
other key is pressed for three minutes.