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