Elation ProfessionalメーカーDMX 101の使用説明書/サービス説明書
ページ先へ移動 of 24
DMX 101: A DMX 512 HANDBOOK :,7+ (92/87,21 &20(6 &+$1*(.
DMX 101: A DMX 512 Handbook 2 Elation Professional ® Handbook Revision: May 2008.
www.elationlig hting.com 3 1. Introduction to DMX .......................................................................................................... ............................ 4 2. Industry Standards .........................................
DMX 101: A DMX 512 Handbook 4 Elation Professional ® This handbook is designed to promote basic understanding of the DMX 512 protocol, including theory of operation, proper equipment use, and some basic applic ation examples.
www.elationlig hting.com 5 About 20 years ago, most manufacturers used their own, proprietary control protocols. This forced system designers to use only fixtures and c ontrol consoles from the same manufact urer. There was no control standard to allow the use of different products.
DMX 101: A DMX 512 Handbook 6 Elation Professional ® 2.3 ANSI The American National Standards Institute (ANSI) is an organization composed of re presentatives from industry and government that collec.
www.elationlig hting.com 7 DMX 512 is an asynchronous serial digital data protocol. Wh ile that might mean someth ing to an engineer, most people are not familiar with how all this techno-gibbe rish actually accomplishes li ghting control. This section will attempt to explain how DMX operates in a simplified and easy-to-understand manner.
DMX 101: A DMX 512 Handbook 8 Elation Professional ® 3.1 The Cable TV Analogy A central concept of DMX 512 is the abil ity to transmit data on multiple cha nnels over a single cable.
www.elationlig hting.com 9 Now imagine a simple DMX system (Figure 2), where: • The Cable TV Company is the DMX Control Console • The Cable is the DMX Cable • The Decoder is the DMX Dec oder (built into a Dimmer) • The TV is the Lighting Fixture Figure 2 The DMX Control Console will broadcast up to 512 channels over one DMX Cable.
DMX 101: A DMX 512 Handbook 10 Elation Professional ® Many DMX devices (such as dimmers and intelligent fixtures) are capable of receiving several control channels at once. If a Dimmer has f our channels capable of cont rolling four Light Fixtures (F igure 3), it must know which four control channels to re ceive.
www.elationlig hting.com 11 3.2 DMX Communications In the world of digital communications, information is se nt using precise electrical voltage pulses. A positive voltage pulse represents a 1. A zero voltage pulse (or no voltage) represents a 0. Systems using 1’s and 0’s to encode information are called binary systems.
DMX 101: A DMX 512 Handbook 12 Elation Professional ® While 4000 feet may be specified by the standard, most manufacturers recommend DM X runs of no more than 1000 feet (300 feet between devices) before using a repeater to regenerate the signal. Each device should have input and output connectors, but these are usually wired together.
www.elationlig hting.com 13 3.3 Summary So how does all this information relate to controlling a light fixture? Think of it in terms of the simple DMX Controller Console (Figure 4). The console may have up to 512 control faders on it (8 in this example).
DMX 101: A DMX 512 Handbook 14 Elation Professional ® Understanding how DMX 512 operates is impor tant, but it’s only part of the picture. The physical equipment, connectors and cabling, play a critical role in the prope r functionality of the prot ocol.
www.elationlig hting.com 15 4.1 Connectors The DMX standard specifies 5-pin XL R connectors (Figure 5). The name comes from the original manufacturer (Cannon X connector, with a L atch and R ubber guard).
DMX 101: A DMX 512 Handbook 16 Elation Professional ® 4.2 Cabling Standard DMX 512 requires twisted-pair, shielded, low-ca pacitance data cable (Figure 7) designed for RS-485 (such as ACCU-Cable from Elation). The twisted-pair configuration ensures that any interference affects both signals equally.
www.elationlig hting.com 17 4.3 Data DMX 512 data is transmitted at 250 ki loHertz (kHz), meaning that 250,000 1’ s and 0’s (at a maximum) can be sent each second. Each bit is measured in 4 microsecond (µs) intervals. In order for the receiving device to correctly interpret the data, it must be sent in a pa rticular sequence.
DMX 101: A DMX 512 Handbook 18 Elation Professional ® The figures on the following pages il lustrate several different applicat ions using various DMX products.
www.elationlig hting.com 19 5.1 Dimmer Control 5.
DMX 101: A DMX 512 Handbook 20 Elation Professional ® 5.2 Intelligent Fixture Control 5.
www.elationlig hting.com 21 5.3 Dimmer & Intelligent Fixture Control 5.
DMX 101: A DMX 512 Handbook 22 Elation Professional ® 5.4 Distributed Control 5.
www.elationlig hting.com 23.
Elation Professional ® A Division of the American DJ Group of Companies 6122 S. Eastern Avenue Los Angeles, CA 90040 USA Tel: 866-245-6726 Fax: 323-832-9142 Web: www.
デバイスElation Professional DMX 101の購入後に(又は購入する前であっても)重要なポイントは、説明書をよく読むことです。その単純な理由はいくつかあります:
Elation Professional DMX 101をまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはElation Professional DMX 101の技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。Elation Professional DMX 101の取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。Elation Professional DMX 101で得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
Elation Professional DMX 101を既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はElation Professional DMX 101の不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、Elation Professional DMX 101に関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちElation Professional DMX 101デバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。