Description Purpose and application

Description Purpose and application
Description
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.
DALI MCU
The potentiometer is mounted in flush 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 fluctuations).
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:
Digital potentiometer
Fitting instructions
• Rotary potentiometer (A)
• Connections (B)
A
–– Control line (da+, da–)
–– Neutral conductor (N)
–– Phase (L)
• Housing with rotary knob (C)
da+ da- L
N
B
C
Installation
Safety instructions
The potentiometer must only be installed and put into operation
by a qualified 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 deenergised.
CAUTION!
Destruction of the potentiometer and other devices
through incorrect mounting!
• The potentiometer is designed for mounting in
flush 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
(kostenpflichtig / charges apply)
Fax.: +49 (0) 1803 677 - 202
www.osram.com
www.osram.de
40083211897216
4008321189721
Continued on the back page!
Connecting the potentiometer
Installation (cont.)
To control DALI ECGs, a maximum of 4 active potentiometers
can be connected in parallel.
LN
• 1 active potentiometer: max. 25 ECGs
C
• 2 active potentiometers: max. 50 ECGs
L
N
• 3 active potentiometers: max. 75 ECGs
~
~
• 4 active potentiometers: max. 100 ECGs
DALI EVG
da
da
CActive potentiometer (with mains connection)
DPassive potentiometer (without mains connection)
da + da - L
N
L
N
~
~
DALI EVG
da
da
D
da + da - L
N
Appendix
Technical data
Operating voltage
230 V AC, 50-60 Hz
Maximum total length of
signal line
300 m
DALI connection
Max. 25 DALI ECG with one
active DALI MCU
Maximum power consumption
3 W
Permissible line cross
section
1 – 4 mm²
Permissible ambient temperature
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
50
4
32
71
da+ da-
L
N
51
71
The requirements as per EN 60928 und EN 61547 are fulfilled.
Conformity with the relevant EU directives is
confirmed by the CE symbol.
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