Cabling And Connections; Attaching Cables To Pass-Through Connectors; Connecting Shields - Extron electronics RGB 400 Series User Manual

Installation and Operation, cont'd
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Installing optional adapter plates

Cabling and connections

Attaching cables to pass-through connectors

The RGB 402 and RGB 404 provide pass-through connectors
for composite video, S-video, RJ-45 network and, for the
RGB 402 only, two-channel stereo audio. These connectors
are mounted on the faceplate. The RJ-45 cable can be
plugged in from the back. Coaxial cables and/or twisted
pair wires must be soldered to the back side of the S-video
and RCA connectors, as described in this section.
Optional adapter plates with various types and
combinations of pass-through audio and video connectors
are available for the RGB 408. Many adapter plates also
require cables and wires to be soldered to the rear
connectors.
Cabling S-video connectors
The illustration below identifies the S-video connector
signal leads. For the RGB 402/404, splice and solder the
Luminance Chrominance
signal
Luminance Chrominance
ground
S-video connector wiring diagram
RGB 400 Series Installation and Operation
2-16
Adapter Plate
#4-40 Nut w/Captive
Washer
RGB 408 (Up to 4 Plates)
R G
B 4
0 8
four wires from this
connector to user-supplied
signal
coaxial cables. Insulate the
soldered connections to
Shield tab
prevent shorts. You can
also use the connector's
shield tabs for
chrominance and
luminance ground tie
ground
points.
Cabling RCA connectors
For composite video, solder the center conductor of a
coaxial cable to the central solder cup of the RCA connector.
Solder the cable's shield to the grounded grounding tab.
See the leftmost and center illustrations below.
Center
Central Solder
Conductor
Cup
Shield
Coaxial Cable RCA Connector
Attaching coaxial and twisted-pair cables to
RCA connectors
For audio, solder the signal wire of a shielded twisted-pair
cable to the central solder cup of the RCA connector. Solder
the ground wire to the grounded tab, as shown above at right.

Connecting shields

Multiconductor cables such as Extron's Install Plenum bulk
cable contain several braided and foil shields. At the
interface end of the cable, the outer braided and foil
shields should be connected to the grounded metal wall
box (or to a grounding wire if a metal wall box is not used).
The wires that make up the braided shield can be
unbraided, then twisted together to form a large, multi-
strand wire that can be folded back under the wall box
cable clamp or attached to the metal wall box with a screw.
See the illustration below.
To prevent short circuits, the outer foil shield
can be cut back to the point where the cable
exits the cable clamp. Both the braided and foil
shields should be connected to an equipment
ground at the other end of the cable.
Cable Clamp
Install Cable
Foil Shield
Grounding outer braided and foil shields
RGB 400 Series Installation and Operation
Grounding Tab
Twisted Pair
Metal Wall Box
Screw
Braided Shield
2-17