OSRAM DALI MCU User Manual
DALI MCU
da+
da-LN
Digital potentiometer
Fitting instructions
Description
A
Purpose and application
The DALI MCU digital potentiometer controls up to 25 DALI
electronic control gears and enables the manual operation of
luminaires with a DALI interface.
The potentiometer is mounted in ush device boxes.
Function
The potentiometer converts rotations of and pressure on the
rotary knob into DALI commands.
By switching multiple DALI MCU in parallel, the number of control locations or the number of controllable luminaires can be increased. If multiple potentiometers are switched in parallel, the
commands of the potentiometer actuated last apply. Automatic
synchronization makes it possible to change the control location
without disturbing effects (e.g. brightness uctuations).
The DALI MCU can be supplied directly from the DALI control
line (= passive operation) or can deliver the required control
current itself when connected to the mains voltage (= active
operation).
Design
The potentiometer is made up of the following components:
• Rotary potentiometer (A)
• Connections (B)
– Control line (da+, da–)
– Neutral conductor (N)
– Phase (L)
• Housing with rotary knob (C)
C
Installation
B
Safety instructions
The potentiometer must only be installed and put into operation
by a qualied electrician. The applicable safety regulations and
accident prevention regulations must be observed.
WARNING!
Exposed, live cables.
Danger of electric shock!
• Only work on the potentiometer when it is de-
energised.
CAUTION!
Destruction of the potentiometer and other devices
through incorrect mounting!
• The potentiometer is designed for mounting in
ush device boxes. If mounted elsewhere, provideadequate cable strain relief and insulation.
• Do not wire the control line with an external voltage, especially not a mains voltage of 230 V.
• Do not exceed the maximum number of ECGs
and total line length.
IV 2009
DALI_MCU_ma0904en_we1.01.indd
OSRAM GmbH
Kunden Service Center
Customer-Service-Center (CSC)
Steinerne Furt 62
86167 Augsburg
Germany
Tel : +49 (0) 1803 677 - 200
(kostenpichtig / charges apply)
Fax.: +49 (0) 1803 677 - 202
www.osram.com
www.osram.de
40083211897216
4008321189721
Continued on the back page!
Installation (cont.)
da
+
da
-
L
N
L
N
DALI EVG
~
~
da
da
L
N
da
+
da
-
L
N
DALI EVG
~
~
da
da
L
N
da+
da-LN
71
71
51
32
4
Connecting the potentiometer
To control DALI ECGs, a maximum of 4 active potentiometers
can be connected in parallel.
C
D
• 1 active potentiometer: max. 25 ECGs
• 2 active potentiometers: max. 50 ECGs
• 3 active potentiometers: max. 75 ECGs
• 4 active potentiometers: max. 100 ECGs
C Active potentiometer (with mains connection)
D Passive potentiometer (without mains connection)
Appendix
Technical data
Operating voltage 230 V AC, 50-60 Hz
Maximum total length of
signal line
DALI connection Max. 25 DALI ECG with one
Maximum power consumption
Permissible line cross
section
Permissible ambient temperature
300 m
active DALI MCU
3 W
1 – 4 mm²
0 °C to 50 °C
Protection type IP 20
Protection class II
Dimensions Flush-mounted part (Ø x H):
51 x 32 mm
Mounting plate (L x W):
71 x 71 mm
Dimensions
The requirements as per EN 60928 und EN 61547 are fullled.
Conformity with the relevant EU directives is
conrmed by the CE symbol.