~20~
6.3. Multi-input system
Below is the diagram for connecting the system in the multi-input version. We use such a system wherever there is a
need to communicate with tenants from the main entrances. In individual staircases, the panels with control
electronics are configured as in the above items (depending on whether video/audio). For ease of installation, control
electronics can be installed outside the panels.
In order for the system built from individual systems to become a multi-input system, all control electronics should be
connected with a parallel communication bus marked on the CC-4000 board as 'COMM'. In the audio version there
are five wires, seven for video. The bus contains digital RS485 communication, audio and video signals. For the
audio version, connect in parallel all terminals G, B, A, S, M in all CC-4000 boards. In the video version these are
terminals G, B, A, S, M, H, L. In the video version, to prevent distortion of the image from the MASTER panels, the H
and L terminals should be bridged using a resistor of 470 Ohm in the most remote CC-4000 plates.
The MASTER gate panel is connected to the MASTER terminal on the CC-4000 electronics board. It does not matter
to which control electronics board the MASTER panel is connected. As a rule, it should be the electronics to which
the connecting cables have the shortest route. It should be noted that the MASTER connector on the CC-4000 board
does not have a '12V' terminal. All MASTER panels must be powered from a local DC power supply.
When making connections between devices, the "star" type should be avoided as much as possible. The ideal
topology is the "bus". When devices are connected in a "star" connection with long branches, reflections may occur
that prevent communication.
There is no limit to the number of parent panels in the CC4000 system. In addition, there is no limit in the number of
panels connected to one control electronics. You can, for example, connect four gate panels to one MASTER
terminal on the CC-4000 board (in the video version, a vision switch must be inserted).
When ringing from the gate panel, the ringtone sounds are accelerated twice allowing the subscriber to distinguish
them. A conversation with the MASTER panel with any staircase does not block the other sub-inputs in any way.
Main features of the panel configured as 'MASTER'
It does not require the assigned control electronics.
It communicates with the resources of each electronics connected to the system.
It does not differ in anything in terms of hardware and software from the SLAVE panel.
It requires its own DC power supply.
Access only to the program , other programs are blocked.
Connected only to the 'MASTER' terminals of the CC-4000 board
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