Theatre Design & Technology - Winter 1987 - 26

USITT DMX512 & USITT AMX192

Maximum
Update Rate
for 512
dimmers
including
RESET and
START:

USITT AMX192 ANALOG MULTIPLEX
DATA TRANSMISSION STANDARD FOR
DIMMERS AND CONTROLLERS

22.71 milliseconds
44.03 times per second

1.0 SCOPE

This standard describes a method of analog
multiplexed data transmission between controllers and dimmers. It covers electrical
characteristics, data timing, connector type,
and cable type.

7.1 Timing Diagram

See Figure 1 for the DMX512 timing diagram.
8.0 LOSS OF DATA TOLERANCE

In the event of loss of data on the data link the
receiving device shall maintain last rec:ived
levels for at least one second.

2.0 APPLICABILITY

This standard is intended as a guide for:
1. Equipment manufacturers and system spec-

9.0 CONNECTORS

ifiers who wish to integrate systems of dimmers and controllers utilizing analog multiplexed control.
2. Equipment manufacturers seeking to adopt a
basic controller-dimmer analog multiplex
data transmission protocol.

Where connectors are used, the data link shall
utilize 5-pin "XLR" style microphone connectors. Some manufacturers of this connector are:
Swi tchcraft
ITT Cannon
Neutrik
9.0.1

It is important to note that the origins of this
standard come from a control protocol originally developed by Strand Lighting (StrandCentury Inc.). This protocol is used by a large
installed base of equipment manufactured by
Strand and many other manufacturers. One of
the objectives of this standard is to describe a
protocol that will successfully communicate
with most of this existing equipment. Because
the original protocol has undergone many
slightly different versions, this standard is broken down into two major areas:

Connector Sex

Female connectors shall be utilized on controllers or other transmitting devices and male connectors shall be utilized on dimmers and other
receiving devices. In cases where an optional
second data link is implemented using the spare
pins of the connector for bidirectional transmission, female connectors shall still be utilized on
the con troller.
9.0.2 Connector Pin Designation

1. Receive Timing. Dimmers or other recei ving
devices that adhere to these timing requirements should be able to successfully communicate with most existing consoles that
use different variations of the original Strand
protocol.

Connector Pin Designations shall be as follows:
PIN 1- Signal Common (Shield)
PIN 2-Dimmer Drive Complement (Data
1 -)

PIN 3 - Dimmer Drive True (Data 1 + I
PIN 4 - Optional Second Data Link
Complement (Data 2 -)
PIN 5-0ptional Second Data Link True
(Data 2 +1

10 k(),m

10 Ohm

.y ------,..-----J\/\!\!'--~

2N2222
100 Ohm

->\,\,y'\.....__

l--

10.0 CABLE

Cable shall be shielded twisted pair approved
for RS-422/RS-485 use. Examples of suitable
cables are:
Belden 9841
Alpha 5271 (one pair, no spares provided)

""ALec

---~':"-CA324Q

1-----(2N2907
10 0"'.....

24

TD&.T . WINTER 1987

'1

-y -~-'V\;\.~SIGNAL

_ _ _ _ _ _ _~ - - - - - - - - -S:C·,'.

co-t'"O'l

CO""T"O',

>7

'.JO
SYNC

c.. -

----0---~\'.',\··-----~

5:;75' 58

Belden 9842
Alpha 5272 (two pairs, one as a spare)

A',ALOC

~

gu-e

\,\.,.~-----

'00 0..,-

-

... ·... (192 ~"co--e"'aeo

:J.-

c.:x'.
c.cc, -


http://www.c.cc

Table of Contents for the Digital Edition of Theatre Design & Technology - Winter 1987

Contents
Theatre Design & Technology - Winter 1987 - 1
Theatre Design & Technology - Winter 1987 - 2
Theatre Design & Technology - Winter 1987 - 3
Theatre Design & Technology - Winter 1987 - Contents
Theatre Design & Technology - Winter 1987 - 5
Theatre Design & Technology - Winter 1987 - 6
Theatre Design & Technology - Winter 1987 - 7
Theatre Design & Technology - Winter 1987 - 8
Theatre Design & Technology - Winter 1987 - 9
Theatre Design & Technology - Winter 1987 - 10
Theatre Design & Technology - Winter 1987 - 11
Theatre Design & Technology - Winter 1987 - 12
Theatre Design & Technology - Winter 1987 - 13
Theatre Design & Technology - Winter 1987 - 14
Theatre Design & Technology - Winter 1987 - 15
Theatre Design & Technology - Winter 1987 - 16
Theatre Design & Technology - Winter 1987 - 17
Theatre Design & Technology - Winter 1987 - 18
Theatre Design & Technology - Winter 1987 - 19
Theatre Design & Technology - Winter 1987 - 20
Theatre Design & Technology - Winter 1987 - 21
Theatre Design & Technology - Winter 1987 - 22
Theatre Design & Technology - Winter 1987 - 23
Theatre Design & Technology - Winter 1987 - 24
Theatre Design & Technology - Winter 1987 - 25
Theatre Design & Technology - Winter 1987 - 26
Theatre Design & Technology - Winter 1987 - 27
Theatre Design & Technology - Winter 1987 - 28
Theatre Design & Technology - Winter 1987 - 29
Theatre Design & Technology - Winter 1987 - 30
Theatre Design & Technology - Winter 1987 - 31
Theatre Design & Technology - Winter 1987 - 32
Theatre Design & Technology - Winter 1987 - 33
Theatre Design & Technology - Winter 1987 - 34
Theatre Design & Technology - Winter 1987 - 35
Theatre Design & Technology - Winter 1987 - 36
Theatre Design & Technology - Winter 1987 - 37
Theatre Design & Technology - Winter 1987 - 38
Theatre Design & Technology - Winter 1987 - 39
Theatre Design & Technology - Winter 1987 - 40
Theatre Design & Technology - Winter 1987 - 41
Theatre Design & Technology - Winter 1987 - 42
Theatre Design & Technology - Winter 1987 - 43
Theatre Design & Technology - Winter 1987 - 44
Theatre Design & Technology - Winter 1987 - 45
Theatre Design & Technology - Winter 1987 - 46
Theatre Design & Technology - Winter 1987 - 47
Theatre Design & Technology - Winter 1987 - 48
Theatre Design & Technology - Winter 1987 - 49
Theatre Design & Technology - Winter 1987 - 50
Theatre Design & Technology - Winter 1987 - 51
Theatre Design & Technology - Winter 1987 - 52
Theatre Design & Technology - Winter 1987 - 53
Theatre Design & Technology - Winter 1987 - 54
Theatre Design & Technology - Winter 1987 - 55
Theatre Design & Technology - Winter 1987 - 56
Theatre Design & Technology - Winter 1987 - 57
Theatre Design & Technology - Winter 1987 - 58
Theatre Design & Technology - Winter 1987 - 59
Theatre Design & Technology - Winter 1987 - 60
Theatre Design & Technology - Winter 1987 - 61
Theatre Design & Technology - Winter 1987 - 62
Theatre Design & Technology - Winter 1987 - 63
Theatre Design & Technology - Winter 1987 - 64
Theatre Design & Technology - Winter 1987 - 65
Theatre Design & Technology - Winter 1987 - 66
Theatre Design & Technology - Winter 1987 - 67
Theatre Design & Technology - Winter 1987 - 68
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https://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1966Oct
https://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1966May
https://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1966Feb
https://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1965Dec
https://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1965Oct
https://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1965May
https://www.nxtbookmedia.com