- 5 -
4. BEFORE THE ASSEMBLY
Specify the places where video door phone elements are to be mounted.
- Mount the monitor in a place not exposed to strong light (e.g. close to the lamp,
window etc.) as it may obstruct viewing image on the screen.
- Do not mount the monitor in place where it could be exposed to humidity e.g. in
bathrooms.
- Do not mount the monitor near the sources of strong electromagnetic interference
(wiring, TV sets etc.)
- Do not mount the monitor in heating sources - stoves, radiators etc.
- The external panel should be mounted in such a place that the camera lens is not
directed to light source (sun, strong lamp post) because it will significantly obstruct
or prevent viewing the visitors' faces.
- The image on the screen depends on the height the panel is mounted at. The
recommended height is ca. 150 cm Such height allows for viewing the image of the
face of an adult of normal height standing ca. 50 cm from the panel. The assembly
height should be determined on a trial basis.
- Do not mount the external panel at the distance exceeding 60 m from monitor (with
the appropriate cable sections).
- Mount the feeder inside, in a place not exposed to humidity. Feeder should be mounted
on a DIN rail in the electric installation box.
- The above recommendations relate to both the monitor feeder and door strike feeder.
The door strike feeder may be mounted near the external panel (e.g. in the installation
box of fence pillar).
Electric installation of video door phone.
Elements of video door phone may be connected with any cable with section meeting
the requirements specified in Table 1.
At the distances between the monitor and the external panel exceeding 30 m,
a 75 coaxial cable should be used to transmit video signal. The coaxial cable should
be connected as presented in Figure 7.
The maximum distance between the external panel and the monitor should not exceed
60 m.
Table 1. Cable section according to the distance between door phone elements
+Vcc,GND,audio
video
0,4mm
2
<15m
<30m
0,75mm
2
Coaxial cable
<60m
1mm
2
1.5mm
2
2.5mm
2
maximum 4m,
Distance
Connection
external panel - monitor
DCV feeder - external monitor
DCV feeder - monitor
DCV feeder - 230V
monitor - monitor
1mm
2
0,75mm
2
0,75mm
2
0,4mm
2
0,75mm
2
