Description
Purpose and application
The 3-channel dimmer OT DMX 3x2,5A DIM is used for connecting constant voltage LED luminaires and enables the user
to create homogeneous colour moods, simulate daylight and
create dynamic lighting effects in combination with appropriate
DMX control units and user interfaces.
OT DMX 3x2.5A DIM
Function
The connection of the dimmer to a DMX network control unit
and the assignment of DMX addresses make it possible to
individually control the three pulse-width modulated (PWM) LED
outputs (channels).
Design
The dimmer is made up of the following components:
PWM LED Output
A
G
B
C
DMX
E
D
status
3-channel dimmer
Operating instructions
PWR In
10-24 VDC
F
• Button for manually setting the DMX addresses (A)
• Switch for manual (“man. addr.”)/automatic (“auto addr.”)
DMX addressing (B)
• “DMX Out”/”DMX In” RJ45 connections for DMX signal
output (C) and input (D)
• “status”/”DMX” LEDs (E)
• “PWR In” screw terminals for connecting the power supply (F)
• “PWM LED Output” screw terminals for connecting the LED
luminaires (G)
LED display
The integrated LEDs indicate the state of the power supply and
DMX communication:
Installation
LED
"status" (yellow)
"DMX" (green)
OFF/
flickers
Power supply not
connected
No DMX connection/
No DMX signal detected
ON
Normal operation
DMX signal detected
Flashes
Overcurrent on at
least 1 LED output
Waiting for DMX signal during
manual addressing
Safety instructions
The dimmer must only be installed and put into operation by
a qualified electrician. The applicable safety regulations and
accident prevention regulations must be observed.
CAUTION!
Destruction of the dimmer and other devices
through incorrect mounting!
• Ensure that the power supply corresponds to the
input voltage of the connected LEDs: 10 V for
10-V LEDs, 24 V for 24-V LEDs
• Ensure that the connecting lines of the power
supply are sized to conduct the total current required for the LED luminaires (2.5 A per output).
• Note the device labelling.
H
PWM LED Output
10-24 VDC
A power supply unit is needed for the dimmer and LED luminaires. Follow the safety instructions.
The LED outputs are protected against short circuits. The
affected output is switched off in the event of overcurrent or a
short circuit.
HAlternative 1
(reverse polarity protection for LED luminaires and dimmers).
status
10-24V DC
PWR In
J
Connecting the power supply
J Power supply unit
K
PWM LED Output
KAlternative 2 (without reverse polarity protection)
10-24 VDC
J
10-24V DC
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Installation (cont.)
Connecting the DMX components
Control unit: “DMX In” (D)
Optionally, up to 32 dimmers (depending on cable length and
cable quality) can be connected in a row: “DMX Out” (C) with
“DMX In” (D) of the next dimmer in each case.
RJ45 pin assignment:
• Pin 1: DMX –
• Pin 2: DMX +
• Pin 3/7: DMX GND
Operation
Setting the DMX addresses
To be able to individually control the three LED outputs in a
DMX network, the dimmer is assigned three consecutive DMX
addresses (default setting: 1, 2 and 3), depending on the
particular application. Follow the operating instructions of the
control unit.
Alternative 1: setting the DMX addresses manually
The DMX address for LED output 1 (= DMX start address)
can be set manually (default setting = 1). The following DMX
addresses are automatically assigned to LED outputs 2 and 3
(default setting: 2 and 3).
Set switch (B) to “man. addr.”.
‚Press pushbutton (A) for at least 1 s. The “DMX” LED
flashes.
ƒThe dimmer starts to listen and waits for a DMX configuration data frame. The first received DMX data byte not equal
to zero is used as the DMX start address. The “DMX” LED
goes out after the assignment is made.
Alternative 2: automatic assignment
The DMX addresses of all dimmers connected in a row are
assigned automatically (dimmer 1 = 1, 2, 3; dimmer 2 = 4, 5,
6; etc.).
Reset the DMX start address of all dimmers to 1; see below.
‚Set switch (B) to “auto addr.”.
ƒAssign the DMX addresses; see DMX control unit the control
unit operating instructions.
Reset the DMX start address to 1 (reset)
Press pushbutton (A) for at least 1 s. The “DMX” LED
flashes.
‚Press pushbutton (A) again for at least 1 s. The “DMX” LED
goes out.
The DMX start address of the dimmer is reset to 1.
Appendix
Technical data
93 / 3.66
85 / 3.35
10 - 24 V DC
Output current per channel
2.5 A
Output load range per channel
0 … 25 W at 10 V DC
0 … 60 W at 24 V DC
Max. output capacity
1 µF
Frequency of pulse width modulation
488 Hz
Resolution of pulse width modulation
14 bit
DMX protocol
DMX512-A standard
Max. line cross-section
(for connecting power supply and
LED outputs)
1.5 mm²
Operating temperature
0 °C … +50 °C
Protection type
IP 20
Weight
0.128 kg
Dimensions (L x W x H)
93 x 71.5 x 24 mm
24 / 0.94
10-24 VDC
71,5 / 2.81
PWM LED Output
Operating voltage
XII 2009
OT-DMX- 3x2.5A-DIM_ba0912en_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
40083215332652
4008321533265
The CE requirements as per EN 55015, EN 61547 and
EN 61347 are fulfilled.
Conformity with the relevant EU directives is
confirmed by the CE symbol.
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