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Spectra QX40 Pixel
User Manual
14
Notice:
Be sure to follow the diagrams below when making your own cables.
Do not connect the cables shield conductor to the ground lug or
allow the shield conductor to come in contact with the XLRs
outer casing. Grounding the shield could cause a short circuit
and erratic behaviour.
Line termination:
When longer runs of cable are used,
you may need to use a terminator on
the last unit to avoid erratic behaviour.
Using a cable terminator will decrease
the possibilities of erratic behaviour.
(3-pin - Order ref: CABL90,
5-pin - Order ref: CABL89)
5-pin XLR DMX connectors:
Some manufactures use 5-pin XLR connectors for data transmission in place of 3-pin. 5-pin XLR fixtures
may be implemented in a 3-pin XLR DMX line. When inserting standard 5-pin XLR connectors in to a
3-pin line a cable adaptor must be used. The diagram below details the correct cable conversion.
5-pin XLR (female)
Pin 1: GND (screen)
Pin 2: Signal (-)
Pin 3: Signal (+)
Pin 4: N/C
Pin 5: N/C
3-pin XLR (female)
Pin 1: GND (screen)
Pin 2: Signal (-)
Pin 3: Signal (+)
3-pin XLR (male)
Pin 1: GND (screen)
Pin 2: Signal (-)
Pin 3: Signal (+)
5-pin XLR (male)
Pin 1: GND (screen)
Pin 2: Signal (-)
Pin 3: Signal (+)
Pin 4: N/C
Pin 5: N/C
DMX setup
Termination reduces signal
transmission problems and
interference. It is always
advisable to connect a DMX
terminal, (resistance 120
Ohm 1/4W) between pin 2
(DMX-) and pin 3 (DMX+) of
the last fixture.
5-Pin
1
2
4
5
3
3-Pin
1
2
3
Pin Configuration
3-Pin
5-Pin
Pin 1 - Ground
Pin 2 - Negative
Pin 3 - Positive
–
Pin 4 - N/C
–
Pin 5 - N/C
1
2
3
1
2
3
DMX 512
3-Pin XLR output
DMX 512
3-Pin XLR input
GROUND
DMX +
DMX –
DMX 512
5-Pin XLR output
DMX 512
5-Pin XLR input
1
2
4 5
3
1 2
4
5
3
GROUND
N/C
DMX –
N/C
DMX +
1 ground
3 hot
2 cold
3-Pin XLR male
3-Pin XLR female
2 cold
3 hot
1 ground
2 cold
1 ground
5 N/C
3 hot
4 N/C
5-Pin XLR male
5-Pin XLR female
4 N/C
5 N/C
1 ground
3 hot
2 cold
