CV Control of Architectural Fixtures

This video is a detailed tutorial.  See Intro to CV Control of Architectural Fixtures for an overview.

I. How to retrofit wireless LED technology into a custom architectural project. In the example, the lighting elements are decorative  LED strips and a Cree primary downlight.

A. All fixtures must be  UL Listed or equivalent by a recognized testing lab (CSA, ETL, MET, etc.)

1. This means UL Listed drivers for the LEDs

2. This means a UL Listed 12V power supply for the RC4 Magic DMX2dim

a. Anything after a Listed Class-2 power supply no longer requires inspection

b. Low-voltage devices connected after a Listed Class-2 driver, like the decorate lighting LEDs, do not need to be UL listed

3. In this example, the UL Listed drivers and power supply are connected to a single 120VAC mains circuit

a. In many cases, particularly in retrofits using existing wiring, a single mains circuit powers multiple lighting fixtures

B. Using an RC4 DMX2dim to create control voltage

1. Use the 1.2kHz PWM frequency

2. Put a 100 ohm 1/4W (or higher) pull-up resistor across both terminals of the dimmer output

a. A control voltage signal has now been created that will go directly into an architectural ballast CV control input

b. Using the correct PWM and pull up resistor will enable the user to control a wide variety of products on the architectural market

C. This setup allows users to have control over individual light sources with individual fixtures.  The DMX channels assigned to each RC4 dimmer output can be individually assigned as desired

1. Every CV channel could have it’s own unique DMX channel for ultimate control from a DMX console


2. A DMX channel could be assigned to multiple dimmers.  For example, all the decorative lights could be controlled together; downlights could be assigned in rows, columns, or other arrangements

E. Using a DMX4dim provides 4 channels of CV control within a single fixture

F. Multiple dimmers within a fixture can be used to produce any number of CV control signals

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