7.1.
Common Instalation
Typical Electric Lock Connection
Helios
contains a solid-state switch equipped with V-MOS transistors, which is able
to switch both ac and dc regardless of polarity. Make sure that the current and voltage
values do not exceed limits (refer to the Technical Data) and that the technical
parameters of the lock and power supply are compatible.
Never switch 230 or 120 V mains voltage directly!!!
If you do not have an electric lock and want to have one, you should select a 12
V lock, this being the most common type. Connect the lock according to the figure,
which shows the button backlight supply too (see later).
Dc-supplied lock: Practically all locks can be dc and ac supplied. The ac supply is
more advantageous because the lock buzzes, which is the clearest signalling method
however to use a dc supply lock (from batteries, e.g.), you are recommended to equip
Helios
with
acoustic signalling (continuous tone during the whole switch activation
time).
Caution: If the lock power supply fails and the telephone system carries on working, the
keypad-equipped Helios system is unaware of the failure the switch will be password-
activated and the activation is acoustically signalled, but the electric lock will not work
because of the lack of power.
Tel.
line
Power
supply
AC or DC
12V
El. lock
24
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