Vigtig Fikker Heds Information - Danmark; Constructing Data Cables - High End Systems studio spot User Manual

VIGTIG FIKKER HEDS INFORMATION - DANMARK

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Constructing Data Cables

Studio Spot uses standard 3-pin XLR connectors. You should use cable that
meets the specifications for EIA RS-485 applications with characteristics
listed below:
• 2-conductor, twisted pair plus a shield
• maximum capacitance between conductors - 30 pF/ft.
• maximum capacitance between conductor & shield - 55 pF/ft.
• maximum resistance of 20 W/1000 ft.
• nominal impedance 100–140 W
• 22–24 AWG with insulation having a dielectric rating of 300 volts or higher
An example of a cable that meets the above specification is Belden® 9841.
Construct data cables using shielded, two conductor cable with a male 3-
pin XLR connector at one end and a female 3-pin XLR connector on the
other end. Refer to Figure 1.4.
grounding lug
(inside XLR shell)
common
(cable shield)
Test each cable with a volt-ohm meter for correct polarity and ensure that
the negative and positive pins are not grounded or shorted to the shield.
Ensure that pin 1 is the shield. If your DMX controller uses 5-pin data
cables, you will need to construct or purchase a 5-pin to 3-pin adapter.
1-6 Studio Spot User's Manual
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XLR Shell
1 2
negative
3
positive
Figure 1.4 Data Cable Construction
Vigtigt!
eller .
2 1
3
common
(cable shield)
grounding lug
(inside XLR shell)