|WikiProject Stagecraft||(Rated Stub-class, Low-importance)|
I attempted to clean up this article; no substantial edits to the content were made, although it looks significantly different. There's still a list item in the References section above the footnotes, which should be dealt with somehow. The footnotes were originally links in the body of the article itself, which seemed somehow promotional in that format. (They also followed a section which displayed as a block of preformatted text, which I also fixed.) B7T (talk) 15:15, 9 October 2010 (UTC)
cleanup tag "one source"
This is a technical standard that is defined in a single ANSI standard: E1.3. That is the sole source that defines 0-10v control and is the definitive authority. I propose the "one source" tag be removed due to the authoritative nature of that one, primary, source. Korky99 04 (talk) 20:19, 20 July 2016 (UTC)
Current Sinking Description Accuracy
The first paragraph appears to imply 0 volts "returned" commands full brightness, while 10 volts returned commands full dimming. That is backwards to my understanding and experience. Am I missing something?
Here is a proposed 3 paragraph replacement for the first paragraph:
Typically utilized in architectural lighting, a current sinking control scheme uses ballast or driver provided 10V DC. The controller reduces the returned volts to the light. If the controller returns the full 10V, the light will be at its brightest level. The light will be at minimum level if no volts are returned. The current sinking scheme creates a fail safe situation. Should a control wire be cut or the controller fail, the lights will illuminate.
Commonly, the 10V control voltage is supplied through a resistor. Control is achieved (and current is sunk) by connecting a variable resistor between the control voltage terminal and ground. The two resistors form a voltage divider to produce a control voltage Vc = Vs * (Rc / (Rc + Rs)) where Vc is the returned control voltage, Vs is the source voltage, Rc is the variable control resistance, and Rs is the source resistance. Vs may be greater than 10v so that a maximum intended value of Rc produces a 10V maximum control voltage. Rc must be adjusted to a value of 0 ohms (a direct short) to return a 0V control voltage.
As a practical matter, many 0-10V dimming control inputs can be operated by replacing the variable control resistor with an electronic switch. When the switch is on, the control voltage is near 0 and the light is fully dim. When the switch is off, the control voltage is maximum and the light is fully bright. The switch is controlled by a PWM (Pulse Width Modulation) signal, which alternately turns the switch on and off at a rapid rate. The relative proportion of off time vs. on time determines brightness. For example, if the switch is off 10% of the time, the resulting control signal would be the equivalent of 1V produced with a variable resistor. The PWM method does not require selection of accurate resistance values. It can be applied simultaneously to control signals of multiple lights by connecting their control inputs in parallel.
- Any changes will need to be supported by reliable sources. Promotional material, such as blogs from retailers or press releases, are not reliable in most or all cases. Additionally, content should be directly supported by sources. Do not add original research. Grayfell (talk) 04:15, 27 May 2020 (UTC)