2N 9135110E, Руководство по установке

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Installation manual 2N® Analog Vario
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against this discharge. The terminal carries the charge from the panel to the ground directly, not
through
the 2N
®
Analog Vario circuits.
Where no grounding cable is available, it is possible to connect the grounding terminal with any
of the telephone line terminals*). In some telephone systems one line terminal is directly
connected with the ground, the others carry current to the ground through overvoltage
protection.
Separate Backlight and Electric Lock Supply
Separate power supplies are necessary where the lock requires voltage higher than 12 V. In this
case, an additional power supply (12 V) must be used to illuminate the button backlight
– see
the figure below. Other reasons for such connection are the effort to minimise consumption
from the back-up supply (which supplies the lock, not the backlight), or just that two weaker
power supplies are available
Connection of Switch 2
A new additional switch, Part No. 9135250E, has been designed for 2N
®
Analog Vario . It can be
mounted into any basic unit, as an added option. To connect it, follow the instructions included
in the switch delivery.
2.4 Camera Installation
The camera unit, Part No. 9135210E, can be built into any 2N
®
Analog Vario basic unit during
installation or as an option to be added later. It is a colour CCD camera with high resolution of
•
Note
This connection eliminates direct connection of the line conductor onto the panel
because there is a protective element between the panel and the grounding
terminal.
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