DoorBird A1101 Manuel D'installation page 9

The provided mains adaptor is only capable
to power one device. It is not designed to
power multiple devices simultanously.
If you must power more than one device
with one power supply, we recommend to
use a PoE-Switch with PoE Standard IEEE
802.3af Mode A or an appropriate DIN rail
power supply (see "OPTION 3").
Do not plug the power supply unit into the
N OTI C E
wall socket yet.
Only use the power supply unit (see
"OPTION 3") provided along with the device,
or a DIN-rail power supply unit that you
can obtain from us separately, since this
has been specially stabilized electrically
and is equipped with an integrated audio
interference reduction device. Other
power supply units may destroy the device
or cause poor transmission quality. The
warranty automatically expires if you use a
different power supply unit.
The power supply unit is plugged into a
wall socket inside your house (Step 10),
usually where the two wires from your
assembly location come out of the wall in
the interior of the house.
The provided mains adapter is not
outdoor-ready, it is for indoor-use only.
OPTION 2
Power supply and network connection
using PoE (Power over Ethernet)
To power the device via a PoE-Switch (e.g. D-Link
DGS-1008P) or PoE-Injector (e.g. DoorBird Gigabit PoE
Injector A1091), use a CAT.5 cable or higher in accor-
dance with the PoE standard IEEE 802.3af Mode A.
A CAT.5 cable or higher must be used for this purpose,
as network signals can only be transmitted over com-
pletely insulated, shielded and twisted cables. If you
use PoE as a source of power, the four wires for PoE
then simultaneously form the data line. The device
will not start if your PoE-Switch/PoE-Injector does not
support the PoE Standard IEEE 802.3af Mode A.
Please check www.doorbird.com/poe for known
incompatibilities.
If you must power more than one device
with one power supply, we recommend to
use a PoE-Switch with PoE Standard IEEE
802.3af Mode A or an appropriate DIN rail
power supply (see "OPTION 3").
Theoretically (not recommended by us!), an
unshielded, but over the whole length (max.
80 m/262 ft) twisted bell wire with two pairs
of wires (first twisted pair of wires: "T+, T-",
second twisted pair of wires "R+, R-") can be used for
the network and PoE transmission as an alternative
to a Cat.5 network cable or better. This is comparable
to a Cat.3 network cable. In this case, however, we
cannot guarantee the data throughput or the stability
of the network connection and power supply; this
must be measured and checked on site by qualified
personnel over several hours (network data is
transmitted at high frequency, therefore a shielded
Cat.5 network cable twisted in pairs or better must
normally be used).
Do not combine the power supply from the
NOT ICE
power supply unit (mains adaptor) with the
power supply via PoE.
You can find further information about PoE here:
www.doorbird.com/poe
1. Disconnect the PoE-Switch or PoE-Injector
from the power grid.
2. Place the network cable in the installation
site of the device.
OPTION 3
Power supply using a DIN rail power
supply unit
Alternatively to the mains adapter, we offer DIN rail
power supplies in our online shop, which can be in-
stalled by a specialist. The network connection is then
made via a network cable or alternatively via WiFi.
If you must power more than one device
with one power supply, we recommend to
use a PoE-Switch with PoE Standard IEEE
802.3af Mode A or an appropriate DIN rail
power supply.
Planning information to power multiple devices
with a single DIN rail power supply unit
You must plan the cabling for the DIN rail power
supply of the devices carefully, if you want to install
more than one device in your building with a single
DIN rail power supply unit.
The device has a power consumption of 5 Watt and
an input voltage range from 15 to 48 VDC.
Each cable / wire has a specific load limit and loop
resistance and power loss for physical reasons. The
planning of the cabling, maximum number of devices
and power supply depends on this. The following
information will help you to plan the power supply
installation in the building.
Please calculate the maximum number of
devices and the power supply carefully,
matching to the wire diameter and cable
length. Wrong calculation and installation
can lead to overheating, damage, electrical
short and fire.
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