Extron electronic SW DVI A Series Wiring the Remote/Autoswitching Connector, Audio output

Installation, cont’d

Audio output

The 5-pole captive screw audio output connector is used for both balanced and unbalanced audio. When the connector is wired for unbalanced audio, the gain is unity.

Tip	L	Tip	L
NO GROUND HERE		Ring
Sleeves		Sleeves
Tip	R	Tip	R
NO GROUND HERE		Ring
Unbalanced Output			Balanced Output

C

For unbalanced audio, connect both sleeves

to the center contact ground. DO NOT connect the sleeves to the negative (-) contacts.

Do not tin the wires!

Wiring the audio output connector

Wiring the Remote/Autoswitching Connector

The 5-pin, 3.5 mm Remote/Auto-Sw captive screw connector is used for optional RS-232 communication and/or to enable autoswitching between inputs connected to the SW2/SW4.

Wiring for RS-232

1. Wire the RS-232 cable to the five-pole captive screw plug, provided with the SW2/SW4, as described below. Connect only the red, orange, and green wires in the cable; and use only the first three pins on the connector, starting at the left.

a. Connect the red wire to the first pin on the left, which plugs into the Tx (transmit) port.

b. Connect the orange wire to the second pin, which plugs into the Rx (receive) port.

c. Connect the green wire to the third pin, which plugs into the ground port, marked with this symbol: _

2. Plug the five-pole connector into the Remote/Auto-SW receptacle on the switcher’s rear panel.

The following figure shows how to wire this shared connector for RS-232.

Remote/Auto-Sw

TxRx A S SW 2 or SW 4 DVI A Switcher

Rear Ranel

RS-232 Port

Connect a ground wire between the switcher and the computer or control system.

Green		Ground
Orange	Rx		Transmit (Tx) 3
		Receive
Red
	Tx	Transmit	Receive (Rx) 2

To connect your computer or control system to the RS-232 connector, use a male 9-pin, D-to-bare-wire RS-232 cable or a universal control cable (UC 50', UC 100', or UC 200'). One end of the UC cable is terminated with a female 9-pin D connector, and the other end is unterminated. Wire the unterminated end to the provided five-pin captive screw plug.

If you use cable that has a drain wire, tie the drain wire to ground at both ends.

9 pin HD

Connector

To Computer or

Control System

RS-232 Port

The following diagram shows the UC cable’s pin assignments.

Color

Black	9
Gray	8
Purple	7		1
Blue	6			6
Green ( )	5
				9
Yellow	4		5
Orange (Rx)	3	UC Cable
Red (Tx)	2
Brown	1	Shield	Connector Shell
	Pin #

	Computer
SW DVI A Series	or Control
	System
Switcher

UC cable pin assignment color codes

2-12 SW DVI A Series • Installation

RS-232/autoswitch connector pin assignments

Enabling autoswitching

You can set up the SW2/SW4 to automatically select the active, connected input. If two or more inputs are active, the input with the highest number is selected. When autoswitching is in effect, the green Auto Switch LED on the front panel lights, and the front panel input selection buttons are disabled.

SW DVI A Series • Installation 2-13