Cyclo 04 DMX user manual
9
Creating a data link
The data transmission rate (250 kbits/s) used by DMX512 requires the
selection of a cable which does not significantly distort the signal or give rise
to spurious signal reflections. Cables intended for use with audio systems
(microphone cables), while having the convenience of flexibility, availability
and relative low cost, are NOT suitable for use with DMX512 because of
their high capacitance and incorrect characteristic impedance; at DMX512
d ata r a t es t h is w i l l g i v e r i s e t o bi t t i m e d i s t o r t i o n a n d s i g n al
reflections/overshoot.
Cabling systems shall provide a balanced, nominal 120 ohm terminated
transmission line, and be made of cables with a characteristic impedance in
the range 100-120 ohms. The following cabling accesories can be ordered
from your Martin dealer:
CAT5 network cables - 2 m (6.5 ft) x 50 pieces. . . . . . . . . . . . . . . . . . . . . . . . P/N 91611044
CAT5 network cables - 5 m (16.4 ft) x 30 pieces. . . . . . . . . . . . . . . . . . . . . . . P/N 91611045
CAT5 network cables - 10 m (32.8 ft) x 15 pieces. . . . . . . . . . . . . . . . . . . . . . P/N 91611045
Termination Plug RJ-45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P/N 91613028
Note:
Mixing cables of different impedances and other characteristics
not isolated by buffers or other processing devices may affect
system reliability.
Always use solid or stranded shielded-twisted pair/foiled twisted pair
(STP/FTP), 100 or 120 ohm cables that conform to ISO IEC 11801 category
5 or higher with RJ-45 connectors wired as follows
The minimum wire size is 0.2 mm (24 AWG) for runs up to 300 meters (1000
ft.) and 0.322 mm (26 AWG) for runs up 500 meters (1640 ft.). Your Martin
dealer can supply the right cable in various lengths.
The: RJ-45 sockets in the Cyclo 04 DMX are wired as follows - pins 7 & 8 to
ground, pin 2 to signal - (cold), and pin 1 to (hot).
Pair
Wire #
Color
Function
DMX512 Pin
Pair 2
1
white / orange
data 1 +
DMX512 Pin 3
2
orange
data 1 -
DMX512 Pin 2
Pair 3
3
white / green
data 2 +
DMX512 Pin 5
4
green
data 2 -
DMX512 Pin 4
Pair 1
5
blue
Not assigned
6
white / blue
Not assigned
Pair 4
7
white / brown
Signal Common (0 v)
DMX512 Pin 1
8
brown
Signal Common (0 v)
DMX512 Pin 1
Shield
drain
Summary of Contents for CYCLO 04 DMX
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