- Extron Electronics Mountable Interfaces User's Manual

RGB 400 Series Installation and Operation
RGB 400 Series Installation and Operation
Installation and Operation, cont’d
signal. For example, the input signals from the left side of
channel one (CH1L) are output as CH1L+ and CH1L-. The
following illustration shows the audio inputs and outputs
and how to wire the audio connectors.
Captive Screw
Connector
Base
Circuit Board
MaleFemale
L
R
GND
L
R
GND
L
R
GND
L
R
GND
Channel 1
Channel 2
Channel 1
from Audio L, R
RCA
Connectors
Channel 2
from PC
3.5mm
Connector
Wiring RGB 404 audio connectors
To wire the audio output captive screw connector, follow
these steps:
1. Prepare the wires for insertion into the connector by
trimming off 3/16 inch of insulation.
2. Following the wiring diagram found on the label on
the back of the faceplate or in this manual, insert the
wires one at a time into the connector.
3. Tighten the wire clamp in the connector by turning the
appropriate screw clockwise. Do not overtighten the
screw. Avoid touching circuit board components with
the ends of the wires. See the illustration below.
RGB 404 RGB 406 and RGB 408
Base
Ground/Shield
Ground/Shield
Circuit Board Circuit Board
Wiring audio output captive screw connectors
4. The cable shields should be connected to either pins 3
and 8 (RGB 404) or pin 3 (RGB 406/408) of the audio
2-19
If shielded twisted-pair wires are used for audio output for
the RGB 404, RGB 406 or RGB 408, the shields should be
connected to either pin 3 (RGB 406/408) or pins 3 and 8
(RGB 404) of the audio output captive screw connector.
Twist the wires from the braided shield together to form a
multi-strand wire, then insert it into the receptacle side of
the captive screw connector. See the “Wiring audio output
captive screw connectors” illustration on the next page.
Twisted-pair shields are not used for most other RGB 400
Series applications, even when twisted-pair wires are used.
For those other applications, twist the shields together, and
fold them back under the wall box cable clamp or attach
them to the grounded wall box with a screw.
To prevent short circuits, unused shielded
twisted-pair wires and exposed cable shields
(braided or foil) must be insulated with
electrical tape or heat shrink, and secured.
Connect coaxial cables’ shields to a ground through the
individual connectors (BNC, S-video or RCA).
Connecting audio cables — RGB 404
The RGB 404 creates two 2-channel, balanced audio outputs
from two unbalanced inputs.
•Audio channel one (CH1) consists of unbalanced input
on two RCA input connectors (one each for left and
right input), and balanced output
on pins 1 – 5 of the 10-pole audio
captive screw connector on the rear
of the circuit board. Wire the RCA
input plugs as shown at left.
•Audio channel two (CH2) consists of unbalanced left and
right input from the single PC-type 3.5 mm audio
plug, and balanced output on pins 6 – 10 of the 10-
pole captive screw connector on the rear of the circuit
board. Wire the stereo PC input plug as shown here:
Tip (+) Sleeve (GND)
Tip (L, +)
Ring (R, -)
Sleeve (GND)
The audio signals are converted from unbalanced to
balanced signals as they pass through the RGB 404. As a
result, two output signals are produced for each input
2-18
Tip
Sleeve ( )