Auxiliary Power Supplies; Cable Type And Signal Ranges; The Signal Ranges For Bus Lines; Maximum Number Of Devices Per Internal Bus Line - ABB Welcome User Manual

Auxiliary power supplies

Auxiliary power supplies can be connected to the internal bus
lines at any position. They serve for the connection of indoor
stations. One auxiliary power supply makes available 45 consumer
units. Neither they nor the connected devices put a load on the
system controller.
The use of auxiliary power supplies increases the number of
devices in a system. The maximum signal range – measured
from the system controller – is not increased. The indoor
stations can be connected to each of the four outputs of the
auxiliary power supply. A uniform distribution of the outputs is
recommended.

Cable type and signal ranges

The following cable types with a diameter of 0.8 mm are
recommended:
» Telecommunication lines J-Y(St)-Y
» Bell lines YR
» Telecommunication lines for outdoor A-2Y(L)2Y
The following cable types should not be used:
» Antenna cables
» NYM cables
» Riser cables
» Cable with a diameter smaller than 0.6 mm

The signal ranges for bus lines

The length of cables for the system controller to the remotest
indoor station or outdoor station must not exceed the following
values:
Connected
indoor or
Bus lines outdoor stations
External bus Audio
External bus Audio/Video
Internal bus line 1 Audio
Internal bus line 1 Audio/Video
Internal bus line 2 Audio
Internal bus line 2 Audio/Video
* When connecting only one ABB-Welcome video outdoor station to
the external bus line the signal range is 150 m.
Note: The two separate internal bus lines 1 and 2 permit the
setup of a pure audio line with a signal range of 300 m and
an audio/video line with a signal range of 100 m.
18 Planning ABB-Welcome systems | User Manual ABB-Welcome

Maximum number of devices per internal bus line

The maximum number of devices per internal bus line must
be observed. It is dependent on the power consumption of
the connected indoor stations:
Connected device type
ABB-Welcome audio
indoor station with
handset
ABB-Welcome audio
indoor station with
display
ABB-Welcome audio
indoor station with
display
ABB-Welcome audio
indoor station with
display
ABB-Welcome IP
gateway for
Busch-ComfortTouch
ABB-WelcomeTouch
* The shortened length of cable in comparison to the signal range of the
ABB-Welcome indoor audio station with display results from the increase
in current consumption in comparison to the ABB-Welcome audio indoor
station with handset. When the maximum number of devices at the system
controller is exceeded, an auxiliary power supply must be used. In turn, for
each of the four outputs of the auxiliary power supply the number of devices
and limits of cable length specified in the table apply.
Note:
a diameter of 0.8 mm. For a diameter of 0.6 mm the length of
cable is halved.
Signal range
300 m
100 m*
300 m
100 m
300 m
100 m
Maximum number of
indoor stations
30 devices
30 devices
6 devices
4 devices
4 devices
®
4 devices
The maximum cable length specified applies to cables with
Maximum cable length
between power sup-
ply and the remotest
indoor station
300 m
100 m*
200 m*
300 m
100 m
100 m