Dali Grouping And Occupancy Control - Philips OccuSwitch DALI LRM2070 User Manual

OccuSwitch DALI
User Guide
Page 42
5.6

DALI grouping and occupancy control

The OSD uses DALI group addressing for occupancy
control . This is the DALI group address of the unit itself (so
on the X interface) .
If enabled, the OSD will send a occpuancy messages over
the DALI network whenever the movement detector is
triggered . These messages contain the DALI group address
of the unit (you can only use 1 of the 16 groups, except
for corridors) . The OSD will act on a message with the
same group address it belongs to itself . It will ignore other
occupancy messages .
The maps below show a typical office application, with on
the right hand side the installation of the OSD units . Below
it shows the group addresses .
2 3 4
1
8 7
5 6
Each group shares occupancy .
Take for instance group 5 . It exists of 2 OSD units . When
one the units detects movement a message with group
5 will be send . The other unit will react as well and both
units will switch (or keep) the lights on at nominal level .
In Group 7 this might be different . Here will the unit
detecting occupancy switch the lights to full, but all
the other units in the group, detecting nobody will, set
the light level to, say, 30% . This will result in an overall
illumination, but only at maximum where required .
In total 64 OSD units can be connected to each other,
using 16 groups . The gateway will also only recognize 16
sensor groups . It is impossible to read an individual sensor