Chauvet Q-Spot 150-LED Bedienungsanleitung PDF herunterladen (Seite 10)

Q-Spot™ 150-LED User Manual 10 9/22/2009 3:57 PM

Fixture Linking

You will need a serial data link to run light shows of one or more fixtures using a DMX controller or to

run synchronized shows on two or more fixtures set to a master/slave operating mode. The combined

number of channels required by all the fixtures on a serial data link determines the number of fixtures

the data link can support.

Important: Fixtures on a serial data link must be daisy chained in one single line. To comply with the EIA-

485 standard no more than 32 devices should be connected on one data link. Connecting more

than 32 fixtures on one serial data link without the use of a DMX optically-isolated splitter may

result in deterioration of the digital DMX signal.

Maximum recommended serial data link distance: 500 meters (1640 ft.)

Maximum recommended number of fixtures on a serial data link: 32 fixtures

Data Cabling

To link fixtures together you must obtain data cables. You can purchase CHAUVET certified DMX

cables directly from a dealer/distributor or construct your own cable. If you choose to create your own

cable please use data-grade cables that can carry a high quality signal and are less prone to

electromagnetic interference.

DMX Data Cable

Use a Belden© 9841 or equivalent cable which meets the specifications for EIA RS-485 applications.

Standard microphone cables cannot transmit DMX data reliably over long distances. The cable must

have the following characteristics:

2-conductor twisted pair plus a shield

Maximum capacitance between conductors – 30 pF/ft.

Maximum capacitance between conductor and shield – 55 pF/ft.

Maximum resistance of 20 ohms / 1000 ft.

Nominal impedance 100 – 140 ohms

Cable Connectors

Cabling must have a male XLR connector on one end and a female XLR connector on the other end.

CAUTION Do not allow contact between the common and the fixture’s chassis ground. Grounding the

common can cause a ground loop, and your fixture may perform erratically. Test cables with an

ohm meter to verify correct polarity and to make sure the pins are not grounded or shorted to

the shield or each other.

COMMON

DMX +

DMX -

INPUT

OUTPUT

Resistance 120

ohm 1/4w between

pin 2 (DMX -) and

pin 3 (DMX +) of

the last fixture.

Termination reduces signal errors. To

avoid signal transmission problems

and interference, it is always

advisable to connect a DMX signal

terminator.

DMX connector configuration

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 21 22

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