Extron electronic ISM 482 manual Captive screw connector wiring for inputs

3Input audio connectors — Connect balanced or unbalanced stereo or mono audio sources to these 3.5 mm, 5-pole captive screw connectors. Connectors are included with the seamless switcher, but you must supply the audio cable. Figure 2-4 shows how to wire a connector for the appropriate input type. High impedance is generally over 800 ohms.

	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 inputs

CAUTION

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.

When making connections for the seamless switcher from existing audio cables, see figure 2-5. A mono audio connector consists of the tip and sleeve. A stereo audio connector consists of the tip, ring and sleeve. The tip, ring, and sleeve wires are also shown on the captive screw audio connector diagram, figure 2-4.

Tip (+)

Sleeve ()

Tip (+)

Ring (-)

Sleeve ()

RCA Connector	3.5 mm Stereo Plug Connector
	(balanced)

Figure 2-5 — Phono audio connectors

The audio level for each input can be individually set, via the front panel, the Ethernet link, or the RS-232 link, to ensure that the level on the output does not vary from input to input. See chapter 3, “Operation”, chapter 4, “Programmer’s Guide”, chapter 5, “Switcher Software”, and chapter 6, “Ethernet Operation”, for details.

Integration Scaling Matrix Switcher • Installation 2-5