Extron electronic RGB 320 manual Audio Input Connections, Audio Output Connections

	Installing RGB 320 Switching Interface Components • Chapter 2
Audio Input Connections
	The 10-pole receptacles are located on the rear panel below the BNC connectors.
	Inputs are on the left side, and outputs are on the right. Each input receptacle has
	five poles on its left labeled for left (L) and right (R) stereo, and the input number
	is also labeled. Polarity (+/-) and ground are marked below. The right five poles
	are labeled COM and PWR for use with an RGB 322/324/326/340 input buffer.
Input	Cable connectors are supplied with the RGB 320, one for each input and output.
L 2 R
	The wires are secured using the captive screws inside the	Input
	connectors. (See Figure 2-3.) Each connector is then
		L 2 R
	plugged into the appropriate input channel position on
	the rear panel. If you are not using RGB 322/324/326/
	340 input buffers, the right five poles are not used.
Figure 2-3. Audio/Comm/Power Input Connectors with Captive Screws

Tip

Sleeve

Tip (+)

Ring (-) Ring (-)

Sleeve

When making connections for the RGB 320 from existing audio cables, see Figures 2-5a and 2.5b. The round audio connectors are shown with the top one (tip and sleeve only) for unbalanced audio and the bottom one (tip, ring and sleeve) for balanced audio. The “ring”, “tip” and “sleeve” markings are also used on the captive screw audio connector diagrams in Figure 2-5a and 2-5b. These examples can be used together as a guide for making audio cables.

Figure 2-4. Examples of Round Audio Cable Connectors

Balanced Input (high impedance)		Three methods of wiring the connectors for audio input are listed and shown here.
Tip		Only the first method is used with RGB 324/326/340 input buffers.
Ring	Left
Sleeve(s)	Gnd	Balanced High Impedance (High Z) Stereo Tip, Ring (Left & Right stereo)
Tip	Right
Ring		See Figure 2-8 for wiring RGB 324/326/340 buffers.
	other half of connector		Balanced Input (600 ohms)
			Tip
Figure 2-5a. Wiring the Input Audio Connectors Using RGB 324/326/340 Buffer			Ring 600 ohm	Left
			Sleeve(s)	Gnd
			Tip	Right

			Input	If you are not using RGB 324/326/340 for audio	Ring
L	2	R
					600 ohm
				inputs, any of the three methods can be used.	other half of connector

Balanced 600 ohm input Impedance Stereo Tip,

Ring (Left & Right)

Unbalanced High Impedance (High Z) Stereo Tip, Ring, Ground (Left & Right)

Figure 2-5b. Wiring the Input Audio Connectors Not Using RGB 324/326/340 Buffer

Unbalanced Input (high impedance)

Tip
Sleeve	Left
	Gnd
Tip	Right
Sleeve
	other half of connector

Audio Output Connections

There are two audio outputs in one 10-pole connector. The left half is output A, and the right half is output B. They can be wired in one of three ways.

Outputs

Unbalanced Output (high impedance)

Tip	Left
See warning.
Sleeve(s)	Gnd
Tip	Right
See warning.
	other half of connector

Balanced Output (high impedance)			Balanced Output (600 ohms)
Tip		Left	Tip	Left
Ring	Gnd		Ring
Sleeve(s)			Sleeve(s)	Gnd
Tip		Right	Tip	Right
Ring			Ring
	other half of connector			other half of connector

Figure 2-6a. Three Methods of Wiring Audio Output

_________ If using the Unbalanced Output example in Figure 2-6a

(left-most example), connect the sleeve(s) to Ground (Gnd). Connecting the sleeve(s) to a negative (-) terminal will damage audio output circuits.

Figure 2-6b. Both Halves of the Output Connector Are Configured the Same

Output

L A R L B R

2-3 RGB 320 Switching Interface System • User’s Manual • Extron