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Doorbird A1101 Series IP Video Indoor Station Manual

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The wire diameter is the inner metal core
only, not the inner metal core plus the
jacket.
Often more than two wires are available
on-site for the connection of an indoor station.
The maximum current can be doubled to
increase the maximum number of installable
devices by using two wires for one core. In
this case, the two wires must be twisted at
both ends. The applied voltage must not
exceed 48 VDC.
ASSEMBLE THE MOUNTING
BRACKET
Lead all cables and wires you want to connect to
the device through the mounting bracket. Screw the
mounting bracket to the wall.
Max. number of indoor stations
Cable length
40
35
30
25
20
15
10
5
0,8 mm
0.031 in
Wire diameter:
0,6 mm
0.024 in
0,5 mm
0.019 in
20 40 60 80 100 120 140 160
65 131 196 262 328 393 459 524
in meter
in feet
INFORMATION FOR PLANNERS OF
EXISTING BUILDINGS
The length of the cables in existing buildings is often
unknown and can only be roughly estimated. The
diameter of the wires and the loop resistance (ohm)
are known or at least easy measurable. This makes
it possible to determine the maximum number of
devices that can be connected to a single wire pair.
The following scenario is calculated and
visualized in a chart under the worst-case
scenario that all devices are connected to
the rearmost end of cable in the building. In
practice, the devices are distributed more or
less evenly over the cable length / floors.
25
Max. number of indoor stations
Loop resistance (Ohm)
40
35
30
25
20
15
10
5
5 10 15 20
0,8 mm
0.031 in
Wire diameter:
0,6 mm
0.024 in
0,5 mm
0.019 in
0
The loop resistance can easily be measured
by switching off the power supply on the
wires to be measured and applying a
short-circuit to the lines to be measured on
one side and measuring the resistance on
the other side of the wires with
a multimeter.
INFORMATION FOR PLANNERS OF
NEW BUILDINGS
If you know how many devices must be installed and
you know the length of the cables, you can check
the following chart to see which wire diameter is
required.
The following scenario is calculated and
visualized in a chart under the worst-case
scenario that all devices are connected to
the rearmost end of cable in the building. In
practice, the devices are distributed more or
less evenly over the cable length / floors.
If shielded cables are used, the shielding should be
connected to each other.
… 10 …


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Others manual(s) of Doorbird A1101 Series IP Video Indoor Station

Doorbird A1101 Series IP Video Indoor Station Additional guide - English - 1 pages

Doorbird A1101 Series IP Video Indoor Station User Manual - English - 3 pages

Doorbird A1101 Series IP Video Indoor Station Additional guide - German, French, Spanish - 1 pages


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