Fermax VDS, Technical Manual

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Page 10 Code 97508I-1 V07_09
VDS VDS
VDS VDS
VDS VDS VDS
VDS VDS
VDS
VDS System Operating Principles
The VDS door entry/video door entry system functions like a large, single-line kit.
Calls from the entry panel are routed via the «L» data line to the residential terminal, establishing a communication
channel between the entry panel and said terminal.
Every apartment terminal (telephone/monitor) is programmed using an address which identifies it within the system
and distinguishes it from the other terminals. The addresses range from 1 to 199 (terminal programming is explained
in the corresponding section for each terminal).
* Call:
When a call is made from the outdoor entry panel to a residence, the panel’s integrated amplifier generates the
corresponding «VDS call code/address» and sends it via the data bus.
The way in which the call is made and the call code generated depends on the type of entry panel:
- Keypad Panels (Direct): The call to the residence is made by entering the «VDS call code/address»
allocated to each residential terminal on the numerical keypad, which also has an access control
function.
- Panels with a keypad and electronic directory (digital) : The call to the residence is made using
the numerical keypad (which also has an access control function) which enters the «VDS call code/
address» allocated to each residential terminal. Alternatively, a call code can be entered (a number,
generally the door number) which is associated with a specific address pre-programmed on the panel.
- Button Panels (City): In the case of the button panels, each button corresponds to a particular «VDS
call code/address» which means that a call can be made to a residence by pressing the
corresponding call button.
9 8 7
6 5 4
3 2 1
A B 0
9 8 7
6 5 4
3 2 1
A B 0
FERMAX
Toni López
The digital panels feature an electronic directory which can be used to search for numbers on an LCD
display and call the corresponding residence directly by pressing the button «bell».