Constant voltage LED's require PWM for dimming
uRay Lighting
operates using a constant* voltage system. In other words,
uRay LED's need to be constantly receiving a 12 volt supply
of power in order to operate properly. In the LED world,
these 12 volt power supplies are also called Driver's. A
constant voltage LED's system requires minimal layout,
therefore making it the preferred system for greatest
flexibility.
Dimming LED's is
completely different from any other type of conventional
lighting, therefore special LED dimming modules are
required. Pulse Width Modulation or PWM for short, is the
method for dimming a constant voltage LED.
The uRayPWM is
placed between the 12 volt Driver and the LED's and
requires a remote control signal from a
0-10 volt lighting controller (supplied by
others.) The PWM is spliced inline between the power
supply, (or driver,) and the uRay LED's. The dimming is set
by a separate module that sends out a control signal in the
form of 0 to 10 volts, with 0 equalling no light (or 0%,)
to 10 equalling the brightest light level (or 100%.)
What the heck is 0-10V lighting control?
From
Wikipedia, the free encyclopedia
0-10V is one of the earliest and
simplest electronic lighting control signaling systems;
simply put, the control signal is a DC voltage that varies
between zero and ten volts. The controlled lighting should
scale its output so that at 10V, the controlled light
should be at 100% of its potential output, and at 0V it
should at 0% output (i.e. "Off").
Because there are
so many styles, shapes, colors and configurations of 0-10v
controllers, we have provided contact information for many
of the manufactures of control systems. Contact your
control system manufacture and ask for a 0-10 volt control
module. This module maybe the same as a 0-10V florescent
lamp dimming module.
*LED lighting either
operates on a constant current or constant voltage. Constant current has many restrictions
on how a system can be configured. Constant
voltage
gives the user greater freedom
to configure a LED lighting system.
Downloads:
Complete uRay PWM
Specs
List of Control
Manufactures