DMX512-A标准：娱乐行业灯光控制协议详解

需积分: 50 32 浏览量更新于2024-07-28 收藏 233KB PDF 举报

DMX512标准，全称为"Entertainment Technology - USITT DMX512-A Asynchronous Serial Digital Data Transmission Standard for Controlling Lighting Equipment and Accessories", 是由娱乐服务和技术协会(Entertainment Services and Technology Association, ESTA)和美国剧院技术研究所(United States Institute for Theatre Technology, USITT)联合制定的一份行业标准。这份标准主要关注于控制器与照明设备、配件，包括调光器之间的数字数据传输方法。该标准详细规定了电气特性、数据格式、数据协议、连接器类型以及推荐使用的电缆类型，旨在促进不同制造商的照明设备系统集成，使得兼容的设备能够无缝通信。对于设备制造商而言，它提供了实施标准化数字传输协议的指导，有助于产品间的互操作性。系统设计者和顾问可以借此获取关于电缆选择和允许连接器的详尽信息。标准强调，虽然它不是要替代除USITT DMX512和DMX512/1990之外的所有现有协议，但它为当前版本的设备（标记为DMX512-A）提供了一个统一的标准，以区别于之前的非正式认可版本。在文档中提到的DMX512通常指的是DMX512-A。值得注意的是，这份标准是一个工作草案，可能在最终发布之前会有修改。未经许可，不得以任何形式出版或营利性复制销售，仅限于完成报告的目的，并且在ESTA技术标准计划中，公布这类预发布信息如本文档是被禁止的。 DMX512-A标准的修订版CP/1998-1031r3的起草日期为2000年10月25日，它在控制照明设备和配件时提供了关键的技术指南，确保了整个行业的通信一致性，推动了技术的发展和标准化进程。对于任何涉及此类技术的开发者、制造商、系统设计者和咨询人员来说，理解和遵循DMX512标准是至关重要的。

DRAFT

Standard, BSR E1.11, Entertainment Technology – USITT DMX512-A Asynchronous Serial Digital

Data Transmission Standard for Controlling Lighting Equipment and Accessories

– 2 –

USITT / ESTA -This document is a work in progress, and may be duplicated only for the purposes of finalizing this Report. It may not be

published in part or in whole or be duplicated for-profit or sold in any manner.

CP/1998-1031r3

DRAFT

Printed Oct 25, 2000 10:25 p

1.3 Appropriate uses of this Standard

Equipment designers and general users of this Standard must recognize that this Standard is intended to fill only

a limited range of uses. Other standards will be more appropriate for different uses. This is not intended to

support a venue wide network that can carry data for lighting, sound, and scenery mechanization, for example,

all on the same wire.

This Standard performs no error checking of NULL START Code packets. There is no assurance that all

DMX512 packets will be delivered. It is common practice for merge units and protocol convertors to drop packets

that they cannot process in a timely manner. The 1986 and 1990 versions of the USITT Standard specifically

allow dimmers to ignore packets that they cannot process in a timely manner, and this concept survives in this

version of the Standard with respect to NULL START Code packets.

1.4 Classes of data appropriate for transmission over links designed to this Standard

DMX512 is designed to carry repetitive control data from a single controller to one or more receivers. This

protocol is intended to be used to control dimmers, other lighting control devices and related non-hazardous

effects equipment.

1.5 Classes of data not allowed on this Standard

DMX512 is not an appropriate control protocol for hazardous applications, including but not limited to Pyrotechnic

Control and Scenery Mechanization.

Data that controls any device that has a reasonable potential to cause serious physical injury shall not be

transmitted over data links built to this Standard. No one shall make, market, or sell such a system while claiming

to be DMX512 or DMX512 compatible or any similar such wording.

1.6 Compliance

Compliance with this Standard is strictly voluntary and the responsibility of the manufacturer. Markings and

identification or other claims of compliance do not constitute certification or approval by the E1 Accredited

Standards Committee. See clause 11 for Marking and Disclosure requirements.

DRAFT

Standard, BSR E1.11, Entertainment Technology – USITT DMX512-A Asynchronous Serial Digital

Data Transmission Standard for Controlling Lighting Equipment and Accessories

– 4 –

USITT / ESTA -This document is a work in progress, and may be duplicated only for the purposes of finalizing this Report. It may not be

published in part or in whole or be duplicated for-profit or sold in any manner.

CP/1998-1031r3

DRAFT

Printed Oct 25, 2000 10:25 p

3 Definitions

3.1 Asynchronous:

signals that start at any time and are not locked or synchronized to the receiving device by

a separate clock line.

3.2 Balanced Line:

a data communications line where two wires are present, the signal and its opposite

(complement), the actual signal being the difference between the voltages on the two wires. Balanced

lines have excellent noise and interference rejection properties.

3.3 Break:

a high to low transition (space) followed by a low of at least 88 microseconds followed by a low to

high transition.

3.4 Common:

see Data Link and Signal Common.

3.5 Common-Mode Voltage:

a voltage appearing equally on the data + (plus) and data - (minus) lines relative

to signal common.

Vcm = (Va + Vb)/2

where:

Vcm

is the Common Mode Voltage

is the voltage on DMX512 data + with respect to signal common

is the voltage on DMX512 data - with respect to signal common

3.6 Controller:

a transmitting device that originates DMX512 data.

3.7 Data +:

true signal.

3.8 Data -:

complementary data signal.

3.9 Data Link:

physical connection between transmitting and receiving devices.

3.10 Data Link Common:

the connection to signal common at the point of interconnection (DMX512 Port) of the

product.

3.11 DMX512 Port:

see Port.

3.12 DMX512 Processing Device:

a piece of equipment that regenerates the timing of any DMX512 packet or

has provision for other signal inputs from which the outgoing DMX512 packet is generated. In the

absence of any DMX512 transmitting capability, the device has provision for other signal outputs which

are controlled in some manner by the incoming DMX512 packet. Basic buffer products are not normally

considered processing devices.

3.13 Driver:

the circuit which drives the transmit signal and is directly connected to the DMX512 line. See Line

Driver.

3.14 Enhanced Functionality:

Active use of the optional secondary data link of a DMX512 port.

3.15 Idle:

the time that the DMX512 line is high and not sending any information (also known as the ‘Mark’

condition).

3.16 In-Line Device:

any component that receives and re-transmits DMX512.

3.17 Isolation:

circuit topology in which the output is completely electrically disconnected from the input.

3.18 Isolation voltage:

voltage specification between input and output stages of an isolated system at or below

which damage or breakdown of circuit components will not occur.

3.19 Legacy Equipment:

transmitting and receiving devices complying with the original USITT DMX512 or

DMX512/1990 in all aspects of those standards. (Exception: receiving devices that are not dimmers but

comply with all other aspects of DMX512/1990 shall be considered to be Legacy Equipment.)

3.20 LEN:

(Load Equivalent Number) the number or fractions of Unit Loads as defined by EIA-485-A.

3.21 Line Driver:

an electrical circuit providing differential voltage excursions on a data link, operating within a

defined Common Mode voltage range and with a specified response to overload and overvoltage

conditions.

3.22 Line Receiver:

an electrical circuit allowing detection of differential voltage excursions on a data link,

operating within a defined Common Mode voltage range and with a specified response to overload and

overvoltage conditions.

3.23 Loop-Through Connection:

a connector or terminal port which connects the signals present on at least

Pins 1, 2 and 3 of one port to another port. Frequently abbreviated to Loop or Thru.

剩余57页未读，继续阅读

brkf123

粉丝: 0
资源: 4

DMX512-A标准：娱乐行业灯光控制协议详解

DMX512中文规范

DMX512原版的协议和中文对照

DMX512控台软件，512协议调试助手

DMX512 协议 英文版

DMX512.rar_DMX512发送_DMX512接收程序_dmx512 app_dmx512 stm32 接收_dmx512

DMX512.rar_DMX512 协议_dmx512_dmx512协议

dmx512通讯程序,可以接收dmx512格式的数据-dmx512.rar_DMX512 接收_DMX512通讯程序_dmx51

dmx512_send_code.rar_DMX_dmx 512 code_dmx 发送_dmx512_dmx512 send

PWM.rar_DMX512 pwm_DMX512 解码_DMX512解码_dmx512

dmx512英文协议

最新资源

DMX512 协议英文版