DMX Primer, Product Linking Daisy Chain

DMX Primer

Starting

Address

The USITT DMX512-A data transmission protocol (DMX, from now on) is based on the EIA-485 standard and it has 512 channels (001 to 512). This system requires a controller (DMX controller), one or more DMX compatible products, and a DMX circuit (also known as “DMX universe”) to link the products to the controller.

Depending on their complexity and features, DMX compatible products may require from one to more than 30 DMX channels to operate. Some DMX products have multiple operation modes (also known as “personalities”), each with its own number of channels and controllable parameters.

In the DMX system, the controller sends DMX data to each product based on the product’s starting address. The starting address is the number of the DMX channel (001 to 512) assigned to the product’s first control channel (Channel 1). When assigning starting addresses to multiple products, it is critical to ensure that no starting address is already in use by another product to prevent channels from overlapping. Otherwise, the affected products may operate erratically.

For instance, a user has two DMX compatible products. Product “A” has four channels and product “B” has six channels. If the user configures the starting address of product “A” to “001”, channels 001 through 004 on the DMX controller will control product “A”. This means that the user should assign the starting address of product “B” to “005” or higher. For a starting address of “005”, the DMX controller would use channels 005 to 010 to control product “B”.

It is possible to control multiple products of the same type by assigning each one of them the same starting address. In this case, all the products would respond in unison (synchronized) to the signals from the DMX controller.

Product

Linking (Daisy

Chain)

DMX compatible products receive the control signals from the DMX controller through the DMX cables. Each product has a DMX In and a DMX Out connector. The figure to the right illustrates how the products link to each other using multiple segments of DMX cable in a sequential format called “daisy chain”.

The order in which the products connect to the DMX controller is irrelevant because all products receive the same DMX signals and they only respond to them based on their individual starting addresses. However, it is important to notice that the connections between products should always be as short and direct as possible.

To ensure the integrity of the DMX signal, follow the recommendations of the EIA-485 standard:

DMX Controller

1st DMX Product

2nd DMX Product

To other products

∙The maximum recommended cable length is 500 m (1,640 feet).

∙The maximum recommended number of products on the same daisy chain is 32.

Connecting more than 32 products on one daisy chain without the use of a DMX optically-isolated splitter may result in deterioration of the digital DMX signal.

LED Followspot 75ST User Manual (Rev. 04)

Page 15 of 17

75ST specifications

The Chauvet 75ST is a remarkable addition to the world of professional stage lighting, renowned for its exceptional performance and versatility. Designed for both indoor and outdoor applications, this powerful fixture is particularly favored by production companies, event coordinators, and touring professionals seeking high-quality lighting solutions.

One of the standout features of the Chauvet 75ST is its impressive brightness. Equipped with advanced LED technology, it delivers an intense output that can easily cover large areas, making it suitable for a variety of events—from concerts to corporate gatherings. Its 75-watt power source ensures that even in well-lit environments, the lighting remains vibrant, allowing it to stand out without competing with ambient light.

The Chauvet 75ST is also designed with versatility in mind. The fixture supports multiple operational modes, including DMX, master/slave, and standalone modes. This flexibility allows users to integrate the 75ST seamlessly into existing lighting setups and coordinate it with other lighting fixtures for breathtaking synchronized displays. Additionally, the fixture’s multiple DMX channels provide users with extensive control over various functions, including pan, tilt, color mixing, and dimming.

Another key characteristic of the Chauvet 75ST is its superior color mixing capabilities. The fixture boasts a full spectrum of colors, ensuring that lighting designers can achieve a wide range of hues and tones to match the mood of any event. Its built-in color macros further simplify the process, enabling users to access pre-set color combinations quickly.

Durability and reliability are also critical aspects of the Chauvet 75ST design. Constructed with robust materials, this fixture can withstand the rigors of touring and live performances. Furthermore, its compact and lightweight design makes it easy to transport and set up, while the quiet operation allows for use in noise-sensitive environments.

The Chauvet 75ST features advanced cooling technology that prevents overheating, ensuring consistent performance throughout extended use. This results in minimized maintenance and increased longevity, making it a sound investment for professionals in the industry.

In summary, the Chauvet 75ST exemplifies innovation in stage lighting, featuring powerful brightness, versatile operational modes, superior color mixing, and rugged durability. Whether used for theatrical productions, concerts, or special events, it stands out as a premier choice for lighting professionals seeking quality, reliability, and creative freedom.