- 5 -
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 face of an
adult of average 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.
To put down in the ground and outside the room it is necesarry to use the damp-proof
cables. The number of wires in the cables is shown on the single line diagram (fig. 4).
NOTE:
It is necessary to pay special attention on quality of connection`s wires and
also on proper isolation of every connection especially when weather conditions
appears. It is recommended to use hermetic cable box and shrink wrap in the
place of joint the wires.
Maladjustment to those recommendation may lead to the impropriety activity
of the door phone set.
+Vcc,GND,audio
video
Table 1. Minimum cable section according to the distance between door phone elements
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 panel
DCV feeder - monitor
DCV feeder - 230V
monitor - monitor
1mm
2
0,75mm
2
0,75mm
2
0,4mm
2
0,75mm
2
