anytronics Anyscene 512 Руководство по установке и эксплуатации - Страница 4
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Печатать страницу4. DMX Requirements
4.1. DMX Loading
The maximum number of DMX receivers allowed along a single line is 32 devices without
the need for a buffer. If a DMX buffer is required within the system and multiple Anyscene
512s are being used the Anyscene's must all be linked together in a daisy chain
configuration and then joined to the buffer for correct operation to the wider DMX line.
4.2. DMX Wiring
The DMX specification is based on the use of a single DMX source at one end of a twisted
pair with receiving equipment connected along the twisted pair, the final receiver must then
have the standard 120Ω termination resistor fitted. The use of multiple DMX sources in
one system (as with a multiple Anyscene 512 installation) is not directly covered by the
specification.
When connecting Anyscene 512 units into a DMX system the same topology should be
emulated by using a daisy chain connection from one end of the system to the other. The
DMX line should be linear from start to finish ideally with no branches or junctions.
Anyscene 512 units and receiving equipment may be placed in any order along the DMX
line, but the equipment at either end of this DMX line (whether receiving equipment or an
Anyscene 512) should have a termination resistor fitted for best results.
4.3. Line Bias Network
To ensure correct operation whether there are several or just one Anyscene 512 units in
the system, only one Anyscene 512 should have its line bias network set to ON.
4.4. DMX Backup
With the power applied, the Anyscene 512 will power up and, if no input DMX data is
detected within 2 seconds, it will start to output DMX data from the last used scene. If
another source of DMX data is detected in the system, the Anyscene 512 will instead
remain dormant in standby/receive mode capturing the current DMX data with start code
zero from channels 1-512.
Whilst in this mode, the yellow Data LED will remain illuminated if valid data is being
received at any of the decoded addresses. If the memory write protection (MWP) switch
is in the OFF position, this captured DMX data can be stored as scenes as per the
programming section of this document.
If the DMX source is then disconnected or fails, the yellow Data LED on the Anyscene 512
will be extinguished. After two seconds the Anyscene 512 will start to retransmit the last
received DMX data, providing a standby or DMX backup feature. None of the mimic LEDs
will be illuminated in this mode as the output data corresponds to the last data received
rather than to the contents of any of the scene memories.
Units 5 & 6 Hillside Industrial Estate
London Road, Horndean,
Hampshire, PO8 0BL
Tel +44 (0)23 9259 9410
Fax +44(0)23 9259 8723
Page 4 of 13
AT1039 Issue 1
Anyscene 512 Operating
Instructions