Chauvet Laser Pointer user manual Data Cabling, Inpu, Outpu

Data Cabling

To link products 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, 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:

Type:	shielded, 2-conductor twisted pair
Maximum capacitance between conductors:	30 pF/ft
Maximum capacitance between conductor and shield:	55 pF/ft
Maximum resistance:	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.

DMX connector configuration

		COMMON
INPU	1	DMX +	1	OUTPU
	3		3
	2	DMX -	2

Terminator

1 3 2

To avoid signal transmission problems and interference, it is always advisable to connect a DMX signal terminator.

120 ohm ¼ W resistor between pin 2 (DMX -) and pin 3 (DMX +) on the output of the last product

Do not allow contact between the common and the product’s chassis ground. Grounding the common can cause a ground loop, and your product 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.

Scorpion™ GBC User Manual 22 August 2011