Extron electronic MDA 3 Series Audio on RCA connectors MDA 3A RCA, Power all models, VersaTools

VersaTools® MDA 3 Series, cont’d

7Bal(anced)/Unbal(anced) DIP switches — For each balanced audio output, set the associated DIP switch to the

	BAL		Balanced (up) position. For each unbalanced audio
			output, set the associated DIP switch to the
			Unbalanced (down) position.
			The balanced or unbalanced nature of the audio
1 2		3
			output is determined by the output connector
	UNBAL

wiring, not the audio input. Each output can be balanced or unbalanced independently of the other two outputs.

Audio on RCA connectors (MDA 3A RCA)

Smooth Ridges

A	A	SECTION A–A
	Power Supply	Tie Wrap
	Output Cord
		0.3” (7 mm) MAX
		Orange Captive Screw

8

MDA 3A RCA

L

POWER

12V

.34A MAX

R

9MDA 3A RCA, Rear Panel

123

	Connector
Figure 12 — Power connector wiring
	The length of the exposed (stripped) copper wires is
CAUTION
	important. The ideal length is 0.3" (7 mm).
	Longer bare wires can short together. Shorter wires
	are not as secure in the captive screw connectors

	INPUT	OUTPUTS
10	8	9

Figure 11 — MDA 3A RCA rear panel

8Audio Input connectors — Connect an unbalanced stereo audio source to these L(eft) and R(ight) RCA connectors.

9Audio Outputs (1 through 3) connectors — Connect up to three stereo audio devices to these L(eft) and R(ight) RCA connectors.

Power (all models)

CAUTION Power supply voltage polarity is extremely important. Applying power with incorrect voltage polarity could damage the power supply and the MDA. Identify the power cord negative lead by the ridges on the side of the cord.

10Power connector — Plug the external 12 VDC power supply into this 2-pole captive screw connector. The power supply is included with the unit. Figure 12 shows how to wire the connector.

CAUTION	Power supply voltage polarity is critical. Incorrect
	voltage polarity can damage the power supply and
	the MDA. Identify the power cord negative lead by
	the ridges on the side of the cord (figure 12).

and could be pulled out.

Use the supplied tie-wrap to strap the power cord to the extended tail of the connector.

Your MDA may have shipped with a blue captive screw connector. This blue connector can be plugged into either a blue or an orange power receptacle.

The ideal length of exposed (stripped) copper wire for the blue connector is 0.2" (5 mm).

The blue connector does not have the extended tail or the included tie-wrap.

Do not tin the stripped power supply leads before installing the captive screw connector. Tinned wires are not as secure in the captive screw connectors and could be pulled out.

To verify the polarity before connection, plug in the power supply with no load and check the output with a voltmeter.

The two power cord wires must be kept separate while the power supply is plugged in. Remove power before wiring.

As an alternative, an Extron P/S 100 Universal 12 VDC Power Supply, part #60-357-01, can power multiple MDAs or other Extron 12 VDC devices using only one AC power connector.

10	VersaTools	®	MDA 3 Series • SpecificationsInstallation	® ®	11
				VersaToolsMDAMDA3 Series3 Series• Specifications• Installation