Laskomex CD-2502 Series Installation, Service And Programming Manual page 8

enclosed to it.
Monitor MVC–6550 and 6650
Colour monitors for Laskomex digital systems. They are loud speaking monitors
without receivers with TFT display operating in duplex system. Detailed information
on monitor assembly and use are included in the instruction enclosed to them.
Signal distributor CVR-1 and CVR-2.
Vision signal distributor is intended for the entry phone in video version. It en-
ables connecting the monitors to entry phone installation or branching the electrical
installation of entry phone. Furthermore, distributor amplifies vision signal.
Electric system, which connects electronic cassette with monitors, is made in form
of bus-bar with distributors CVR-x on the floors. Wires from monitors should be
routed to the distributors. The installation method is important - wire should be
routed from one distributor to the next one and in the distributor at the end of
bus-bar the line load should be configured properly (see dwg 14, page 23).
Signal distributor has one input of signals L+,L-,C+,C- with screw terminals (ARK)
and four independent outputs with sockets RJ45 (CVR-1) or ARK (CVR-2).
Distributor CVR-1 does not require power supply adaptor – it is supplied from mon-
itors connected to it, although it has clamps enabling supplying it from other source
e.g. electronic cassette EC-2502. It is used when the distributor operates as signal
adapter.
Distributor CVR-2 require external power supply adaptor, which can be also used
to supply monitors.
In the distributor there is an amplifying and correction system of video signal al-
lowing optimal adjustment of distributor parameters to the parameters of electrical
system.
Video signal change-over switch CVP-1 and CVP-2
Change-over switch CVP-x is used for the selection of the source of video signal
displayed on the monitor screen of entry phone CD-2502 in video version, operating
in a system with main entrance. Switching-over is made between a signal from the
video camera in external panel at the main entrance and a signal from the video
camera in external panel at the subordinate entrance (staircase). In CVP-2 switch
there are 2 additional inputs (can be connected signals from additional cameras)
where video signal is switched between them - a total of 4 video signal inputs.
The switch has 2 outputs X and Y, which can be used for branching the signal
installation. If there is need to distribute the signal to a larger number of branches,
then signal distributor CVR-x should be used. Change-over switch CVP-x should
be mounted at each subordinate entrance possibly close to electronic cassette and
power supply adapter.
3 ELEMENTS OF ENTRY PHONE
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