Extron electronic MSG0808, MSG0804 manual Installation, cont’d, RS-485 Half Duplex Connection

Installation, cont’d

4RS-232/RS-422/RS-485 connector — A 5-pole captive screw connector for input from a computer or third-party controller using Serial Control Protocol commands or control software for Windows® to remotely control the switcher.

Rx+

Rx-

Tx+

Rx+	5	1
Rx-

Tx+

Tx-

Tx-

Gnd	Gnd	9	6
	RS-232/422/485	DB9 Pinout (Female)
5-pole captive screw connector/socket		To control equipment

	Switcher	Computer
	Serial Port	DB-9 Serial Connector
	RX+	3 TX
RS-232	RX-	2 RX
	TX+
Connection
	TX-	5 GND
	GND
RS-422/485	RX+	2	TX+
	RX-	6	TX-
Full Duplex	TX+	3	RX+
Connection	TX-	7	RX-
	GND	5	GND
		1	GND

RS-485

Half Duplex

Connection

RX+	2	TX+
RX-	6	TX-
TX+	3	RX+
TX-	7	RX-
GND	5	GND
	1	GND

5Serial control setting DIP switch — Allows the switcher to be configured to accept RS-232 (all switches up) or RS-422/RS-485 (all switches down)

communication standard.

RS-232

1 2 3

RS-422/RS-485

DIP switch settings change according to the standard used. Higher standards require a different signal type. DIP switch settings make subtle adjustments to signal type. See chapter 5 - Remote Control for additional information.

6AC power — Standard AC power connector for a power source of 100 – 240VAC, operating at 50/60 Hz.

7AC Fuseholder — Remove this to change out the AC fuse.

8Audio output group — Four (MSG0804) or eight (MSG0808), 5-pole captive screw connector for balanced/unbalanced stereo audio output from the audio input. See Audio input and output in this chapter.

9Audio input group — Eight, 5-pole captive screw connector for balanced/ unbalanced stereo audio input.

Pay special attention to the right channel wiring. The + and – layout differs from most other Extron products.

2-4 MSG Matrix Switchers • Installation