9
ABB i-bus
®
KNX
Introduction
With the DALI-Gateway DG/S 8.1, it is possible to utilise the benefits
of the DALI standard in the KNX building system technology. There is no
time-consuming addressing of the individual DALI devices necessary.
Up to 128 DALI devices can be connected to the DALI Gateway.
A maximum of 16 DALI devices can be connected to the DALI-Gateway
DG/S 8.1 per DALI output (channel), with a total of 128 DALI devices
on the entire gateway. As no individual addressing of the DALI devices
is carried out, the 16 devices per channel can only be controlled and
monitored together as a group. A ballast and lamp fault can be detected
per channel and reported. It is not apparent which channel device has
caused the error message.
These factors predetermine the DALI Gateway for the control of lighting
strips in offices, factories or warehouses or several lamps in one room.
The omission of a time-consuming addressing process is particularly
noticeable in offices which lead off corridors, hotel rooms or patient rooms
in hospitals or old people’s homes in which the individual luminaires are
not visible. Addressing, which requires visual contact with the luminaire,
would only be possible in this case with considerable effort.
For the DALI-Gateway DG/S 8.1, the installation and grouping of the DALI
devices is carried out via the wiring in the same way as the 1...10 V tech-
nology. The electrical installer does not need to change his installation
practices and can still utilise the benefits of DALI digital lighting control.
The combination of the DALI devices in groups of luminaires via software
is carried out directly with KNX group assignment.
Individual control and monitoring is possible for 8 devices with a DALI-Gate-
way DG/S 8.1 if only one device is connected per channel. A very detailed
lighting control system can therefore be used, for example in a lecture room
or exhibition area.
The DALI-Gateway DG/S 8.1 does not require a DALI power supply,
DALI controller or other DALI function module. The DALI Gateway takes over
these tasks together with the KNX grouping in ETS.
As DALI is a master/slave system, the DALI Gateway (master) cannot work
together with other DALI masters. In this case, function and telegram
collisions may occur.
The following diagram explains the channel-related functioning of the DALI-
Gateway DG/S 8.1.
1.3
Special features of the
DALI-Gateway DG/S 8.1