Extron electronic MAV 44 manual Remote connection, Captive screw connector wiring for audio output

Installation, cont’d

7Balanced or unbalanced audio output connectors (captive screw audio connector [A] models only) — 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 2-6 to properly wire an output connector.

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

3/16” (5 mm) Max. Unbalanced Stereo Output Balanced Stereo Output

Do not tin the wires!

Figure 2-6 — 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 3/16” (5 mm).

•If the stripped section of wire is longer than 3/16”, the exposed wires may touch, causing a short circuit between them.

•If the stripped section of wire is shorter than 3/16”, wires can be easily pulled out even if tightly fastened by the captive screws.

8RCA connector audio output (RCA connector audio [A RCA] models only) — The switcher has a pair (left and right) of RCA connectors for each unbalanced stereo audio output (figure 2-5).

Remote connection

9RS-232 connector — Connect a host device, such as a computer or control system, to the switcher via this 9-pin D connector (figure 2-7) for remote control of the switcher.

		Pin	RS-232	Function
		1	—	Not used
5	1	2	TX	Transmit data
		3	RX	Receive data
		4	—	Not used
		5	Gnd	Signal ground
9	6	6	—	Not used
Female		7	—	Not used
		8	—	Not used
		9	—	Hardwired IR input

Figure 2-7 — RS-232 port pin assignment

The cable used to connect the RS-232 port to a computer or control system may need to be modified by removing pins or cutting wires. If you encounter problems while operating under RS-232 control (the switcher may hang up), pins 1, 4, 6, 7, 8, and 9 may need to be disconnected. Either cut the wire to pins 1, 4, and 6 through 9 in a hard-shelled connector or remove pins 1, 4, and 6 through 9 from a molded plug.

See chapter 4, “Remote Operation”, for definitions of the SIS commands and details on how to install and use the control software.

2-6 MAV 44 / 48 / 84 / 88 Matrix Switchers • Installation