12
Giotto spot r
el.1.00
2.0-Construction of the signal cable
Giotto 1200 has a DMX 512 input fitted with standard 5-pin XLR connectors. Screened cables in compliance with EIA RS-
485 specifications and the following characteristics must be used for connections:
- 2 conductors plus screen
- 120Ohm impedance
- low capacitance
- max. transmission rate 250kBaud.
Cable connections:
see illustration, taking care with the screen, which must be connected
to Pin 1
ATTENTION: the screened parts of the cable (sleeve) must NEVER be connected to the system's
earth, as this would cause faulty fixture and controller operation.
Example of connection of the DMX line
To avoid the risk of faulty operation, follow these indications:
Maximum cable length:
500 metres
Max. N° of fixtures connected:
32
Cable runs:
Avoid running cables alongside power supply lines.
Termination:
A 120Ohm resistor between Pins 2 and 3 on the last fixture.
2.1- Construction of the DMX termination
The termination avoids the risk of DMX 512 signals being reflected back along the cable when they reaches the end of
the line: under certain conditions and with certain cable lengths, this could cause them to cancel the original signals.
The termination is prepared by soldering a 120Ohm 1/4 W resistor between pins 2 and 3 of the 5-pin male XLR connector
(see diagram).
1
2
3
4
5
120
Ω
in/out dmx
control
gain
GIOTTO REL. 1.00
mic
main power
fuses
Giotto
m o v i n g h e a d w a s h l u m i n a i r e
1200
enter
up
down
down
up
enter
in/out dmx
control
gain
GIOTTO REL. 1.00
mic
main power
fuses
Giotto
m o v i n g h e a d w a s h l u m i n a i r e
1200
enter
up
down
down
up
enter
in/out dmx
control
gain
GIOTTO REL. 1.00
mic
main power
fuses
Giotto
m o v i n g h e a d w a s h l u m i n a i r e
1200
enter
up
down
down
up
enter
Pilot
1 or 21
2 or 22
3 or 23
4 or 24
5 or 25
6 or 26
7 or 27
8 or 28
9 or 29
10 or 30
11 or 31
12 or 32
13 or 33
14 or 34
15 or 35
16 or 36
17 or 37
18 or 38
19 or 39
20 or 40
program
chase
psycho
preset
unit
step
page
store
edit
levels
times
copy
enter
play
extra
lamp
reset
smpte
rec
on/off
u n i v e r s a l d m x c o n t r o l l e r
0
10
20
30
40
50
60
70
80
90
100%
2000
2000
programming keyboard
multifunction keyboard
grand master
operations
utility
memory obj
memory
1 - 20
21 - 40
setup
Termination DMX
(last ap)
DMX controller
DMX linea
pan
tilt
D I M M R
0
C O L O R
0
G O B O S
0
S H U T T
0
R O T G B
0
F R O S T
0
- 0
- 0
1
2
3
4
5
COMMON
DMX-
DMX+
