LED application sheet

LED application sheet
application sheet
RAKO CONTROLS
CONTROLLING LED LIGHTING WITH RAKO DIMMERS AND MODULES
LED lighting is becoming more
widely used and are set to
become the dominant light source
of the future.
All LED lamps need an associated
driver unit to limit the current
driving the LED. Some newer
lamps integrate the driver into the
base of the lamp but many use a
separate driver unit. There are two
types of LED drivers;
1) Constant current, generally used
for high wattage LEDs where the
LEDs are wired in series.
2) Constant voltage where low
wattage LEDS are wired in
parallel.
The following list shows the different control options available from
Rako.
1. Constant current single channel.
2. Constant current three channel.
3. Constant voltage single channel.
4. Constant voltage three/four channel.
5. 0-10v/DSI/DALI (for drivers requiring a control signal).
6. DMX (for drivers requiring a DMX control input).
7. Mains dimmed.
8. Non dimmed switching
9. Mains dimmed low voltage MR16 lamps.
With modules designed for 3 colour LEDs the raise/lower buttons
act as cycle start/stop buttons controlling a scrolling cycle through
the 4 colours assigned to each of the scene buttons.
telephone +44 (0) 1634 226666 fax +44 (0) 1634 226667 www.rakocontrols.com
application sheet
RAKO CONTROLS
CONTROLLING LED LIGHTING WITH RAKO DIMMERS AND MODULES
CONTROL METHOD 1 - Rako's
wireless constant current
RLED45CC1 module is fed from a
power supply adequate for the
required forward voltage and
power (max 48V and 45W). The
RLED45CC1 has selectable current
outputs to suit the LEDs being
controlled.
Options – 350mA, 500mA,
600mA, 700mA and 1000mA
Up to 45V forward voltage and
45w power.
CONTROL METHOD 2 - Rako’s
constant current 3 channel
20w/channel driver is designed
to control 3 colour RGB LED
fittings.
The module works in conjunction
with a DC power supply between
12-48v and up to 60w.
The different colours are wired in
series to a maximum of 12 and
not exceeding 12w on any one
channel.
CONTROL METHOD 3 - Dimming
constant voltage single channel
up to:
150W @ 12V or
300W @24V
Light fittings using constant voltage
LEDs generally use a standard DC
power supply. These power
supplies have a fixed output and
Rako’s RLED receiver fits between
the power supply and the LEDs.
telephone +44 (0) 1634 226666 fax +44 (0) 1634 226667 www.rakocontrols.com
application sheet
RAKO CONTROLS
CONTROLLING LED LIGHTING WITH RAKO DIMMERS AND MODULES
CONTROL METHOD 4 - Dimming
constant voltage 3 or 4 channel
fittings up to
30W per channel @ 12V or
60W per channel @ 24V
This version is the same as control
method 3 but designed to control 3
colour RGB or 4 colour RGBW
fittings
Note: Slave modules are available
for use when loadings exceed the
capacity of one RLED30CV4
module. Slaves should be used in
preference to multiple RLED30CV4
modules to keep colour cycling
effects in sync.
CONTROL METHOD 5 - Dimming
drivers requiring control signal.
A number of LED drivers can be
dimmed via a control signal, either
0-10V analogue or DSI/DALI
digital. In addition to the mains
wiring a control pair is required
between controller and driver. Each
output on a RAK-4F or RDA800 can
be selected to provide any of the
three options.
telephone +44 (0) 1634 226666 fax +44 (0) 1634 226667 www.rakocontrols.com
application sheet
RAKO CONTROLS
CONTROLLING LED LIGHTING WITH RAKO DIMMERS AND MODULES
CONTROL METHOD 6 - DMX
controlling DMX LED driver.
Many fittings with three colour LEDs
use a driver that requires theatrical
control method called DMX. Rako's
RSRDMX (wireless) or WSRDMX
(wired) units control up to 16
channels of DMX.
CONTROL METHOD 7 - Mains
dimming.
LED fittings designed to work from
conventional mains dimming (typically
GU10 type) can be controlled using
Rako dimmer modules. In the majority
of cases these lamps perform better
using trailing edge dimmers such as
the RMT500, RMT1200 and RAK4T
dimmers. There are a small number of
these lamp types that perform better
when dimmed with leading edge
dimmers such as the RML series
dimmers or RAK4L. The performance
of this style of lamp varies
considerably, both depending on the
manufacturer and wattage. Rako
tests any lamps sent as samples and
the results are documented on our
dedicated website:
leds.rakocontrols.com
It should be noted that due to the
way in which these LED lamps take
their power during the mains cycle
many require a significant de-rating
factor to be applied when calculating
a suitably sized dimmer. In some
cases these may be as high as 10x
(i.e. 500w dimmer rating 50w of
nominal lamp load).
telephone +44 (0) 1634 226666 fax +44 (0) 1634 226667 www.rakocontrols.com
application sheet
RAKO CONTROLS
CONTROLLING LED LIGHTING WITH RAKO DIMMERS AND MODULES
CONTROL METHOD 8 - Non dimmed
Switching.
LED fittings that have a non-dimmable
driver can be controlled using Rako’s
RMS800 module or RAK4-T and RAK4-F
rack options.
telephone +44 (0) 1634 226666 fax +44 (0) 1634 226667 www.rakocontrols.com
application sheet
RAKO CONTROLS
CONTROLLING LED LIGHTING WITH RAKO DIMMERS AND MODULES
CONTROL METHOD 9
There are two options for dimming MR16
LED lamps, which are primarily designed
for replacing halogen spotlights. These
lamps are designed to work with low
voltage lighting transformers. Transformers
designed for halogen lighting however
have varying requirements for acceptable
dimming, such as having minimum
loadings, which are not always suitable
for the low loads of LEDs. As the
transformer adds another variable into the
equation this method often gives poor
results and is not recommended.
Method One – Mains dimmed low
voltage MR16 LEDs (Not recommended)
Method Two – PWM (Pulse Width
Modulation) dimming using a RAKO
RLED150CV1 (Recommended). This
method involves removing the original
lighting transformers and directly dimming
the lamps from an RLED75CV1 module.
This module requires a 12V DC power
supply (such as a standard Constant
Voltage power supply) of an adequate
power rating to be fitted in the circuit
before the RLED75CV1 module, as in the
diagram.
telephone +44 (0) 1634 226666 fax +44 (0) 1634 226667 www.rakocontrols.com
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