Conventional Systems Technical Manual - Alcad

cod.9730015T1+ T1 T1 T1+ T1+ T1 T1+ T1 T1+ T1 T1+ T112 VV15 V+T1+ T1cod.9730016T1+ T1 T1+ T1 T1+ T1 T1+ T1DISTRIBUTION OF THE VIDEO SIGNAL: VIDEO DOOR ENTRY SYSTEMSCOAXIALDIV-034TAP-OFFSTap-offs are usually located on each floor of the building. They branch the video input signal to its tap outputs,where they are connected to the monitors in the dwellings. Connection in series of the tap offs allows the distributionof the video signal of the video unit to all the monitors in the installation.The correct choice of model will depend on the type of cable which is to be used for transmission of the videosignal: whether coaxial or twisted pair.TWISTED PAIRCOAXIALDIV-134SPLITTERSSplitters generate multiple independent output lines from a single video signal input line, while maintaining thesame video signal on each line. They enable the distribution of the video signal along several independentcolumns.The correct choice of model will depend on the type of cable which is to be used for transmission of the videosignal: whether coaxial or twisted pair.TWISTED PAIRPOINT OF ENTRY TO THE BUILDINGENTRANCE PANELDOORENTRY SYSTEMENTRANCE PANELVIDEODOORENTRY SYSTEMENTRANCE PANELGenerally installed at the entry point of buildings, this panel houses the audio unit and the pushbuttons, one foreach dwelling. In video door entry systems the panel also houses the video unit.Its dimensions depend on the number of different dwellings in the building where the electronic door entry systemor video door entry system is to be installed.Depending on the number of dwellings and on the nature of the installation, it may be necessary to install morethan one panel (i.e. entrance panels in parallel) at the entrance to the building.Flush-mounted or surface wall-mounted boxes are used to fix the entrance panel in the desired place. Similarly,in installations where the entrance panel requires extra protection against snow, rain, etc., rain-shields can beused.Note - Cover frames for entrance panels:Cover frames are useful in case where an old entrance panel has to be replaced by a new but smaller entrancepanel, or in installations where the wall on which the panel is to be located is uneven or out of true.AUDIO UNITThis is crucial module of the system. It enables calls to be made to the telephone or monitor of the dwelling andcommunication to take place from both the entrance panel to the dwelling and vice versa. In video door entrysystems, the audio unit also controls the activation of the video unit.The model you select will depend on the type of installation which is going to be performed: installation of electronicdoor entry system (with or without confidentiality feature; with electronic call or buzzing call; with conciergesystem; with internal communication between dwellings) or installation of video door entry system.VIDEO UNITThis is the module which captures the image of the person calling from the entrance panel. It has auxiliary lightingfor situations when the external light is poor. In black and white systems this lighting is by means of infraredLEDs whose light is invisible to the human eye. It is therefore possible to identify with absolute discretion the personwho is calling, even in conditions of poor light. With a colour system, on the other hand, the auxiliary lighting of thevideo unit is provided by means of white LEDs.There are different models of video unit. The choice of the right one for a particular installation depends on thetype of cable to be used for transmission of the video signal (whether coaxial or twisted pair) and on the type ofimage to be transmitted (whether black and white or colour).31