Constructing Cabling; Cable Connectors; Figure 1-8. Xlr 3-Pin Connector - High End Systems Studio Spot 250 User Manual

Constructing Cabling

If you choose to construct cabling, High End Systems recommends that you use data-
grade cable. Data-grade cable is designed to carry a high-quality signal with less
susceptibility to electromagnetic interference. Data-grade cables must be Belden
9841 or equivalent (meets specifications for EIA RS-485 applications) with 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 20Ω /1000 ft.
• nominal impedance 100-140Ω

Cable Connectors

Studio Spot 250 and Studio Color 250 fixtures can accept either 3-pin or 5-pin XLR
cable connectors. Your cabling must have a male XLR connector on one end of the
cable and a female XLR connector on the other end.
In a 3-pin connector, pin one is the common (cable shield), pin two is the data
complement (negative), and pin three is the data true (positive) (see Figure 1-8).
Common
(cable shield)
In a 5-pin connector, pin one is the common (cable shield), pin two is the data
complement (negative), pin three is the data true (positive), and pins four and five are
not used, but they allow a secondary data link to pass through the fixture (see Figure
1-9).
1-8 Setup and Installation
Grounding lug (inside XLR shell)
1
2
negative
3 (data
complement)
positive
(data true)
Male XLR Connector

Figure 1-8. XLR 3-pin connector.

XLR shell
1
2
negative
3
(data
complement)
positive
(data true)
Female XLR Connector
®
Studio Spot 250 / Studio Color
®
Common
(cable shield)
®
250 User Manual