Extron electronic SW AV manual 4 - Captive screw connector wiring for audio inputs

Figure 2-4 shows three methods of wiring the captive screw audio connectors for input and figure 2-5 shows two methods of wiring the connectors for output. A mono audio connector consists of the tip and sleeve. A stereo audio connector consists of the tip, ring and sleeve. If wiring a captive screw connector from an existing unbalanced audio cable, the white insulated wire is typically the left channel (tip) and the red insulated wire is typically the right channel (sleeve). There is no reliable standard for existing balanced audio cables.

	Tip	L
	Sleeve
	Tip	R
	Sleeve
0.2” (5 mm) max.	Unbalanced Stereo Input
Do not tin the wires!		(high impedance)

Tip	L
Ring
Sleeve (s)
Tip	R
Ring

Balanced Stereo Input

(high impedance)

Figure 2-4 — Captive screw connector wiring for audio inputs

The length of exposed wires is critical. The ideal length is 0.2” (5 mm).

•If the stripped section of wire is longer than 0.2”, the exposed wires may touch, causing a short circuit between them.

•If the stripped section of wire is shorter than 0.2”, wires can be easily pulled out even if tightly fastened by the captive screws.

6RCA connector audio inputs (RCA connector audio (A RCA) models only) — Each input has a pair (left and right) of RCA connectors for unbalanced stereo audio input.

7Balanced or unbalanced audio output connectors (all audio models) — These 3.5 mm, 5-pole captive screw connectors output the selected unamplified, line level audio. Connect audio devices, such as an audio amplifier or powered speakers to these connectors. See figure 2-5 to properly wire an output connector.

Tip	L	Left	Tip	L	Left
NO GROUND HERE.			Ring
Sleeve(s)
Tip	R	Right	Tip	R	Right
NO GROUND HERE.			Ring

0.2” (5 mm) max. Unbalanced Stereo Output Balanced Stereo Output

Do not tin the wires!

Figure 2-5 — Captive screw connector wiring for audio output

CAUTION

Connect the sleeve to ground (Gnd). Connecting the sleeve to a negative (-) terminal will damage the audio output circuits.

The length of exposed wires is critical. The ideal length is 0.2” (5 mm).

•If the stripped section of wire is longer than 0.2”, the exposed wires may touch, causing a short circuit between them.

•If the stripped section of wire is shorter than 0.2”, wires can be easily pulled out even if tightly fastened by the captive screws.

SW AV Series Switchers • Installation 2-5