Extron electronics MDA 3A User Manual

MDA 3A • User Guide
This guide describes the installation and operation of the Extron MDA 3A Mini Distribution Amplifier (MDA).
MDA 3A

Introduction

The Extron MDA 3A is a one-input, three-output audio distribution amplifier. The MDA 3A distributes balanced or unbalanced
5 5 5
Audio On Captive Screw Connectors. The MDA 3A ships with an external desktop 12 V power supply that accepts 100 to 240 VAC,
50 Hz or 60 Hz input.

Connections, Controls, and Indicator

Figure 1 shows all of the connectors on the MDA 3A.
Front
MDA 3A

POWER

INPUT
12V
.3A MAX
L R L 1 R
1 1 1 2 2 2
Rear
1
Power Connector
Audio Input Connector
2
Figure 1. MDA 3A Rear and Front Panels
Power
ATTENTION:
•
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.
•
La polarité de la source d'alimentation est primordiale. Une alimentation avec une polarité de tension incorrecte peut
endommager la source d'alimentation ainsi que MDA. Il est essentiel d'identifier une connexion négative du cordon
d'alimentation au niveau des stries sur les parties latérales du cordon.
1
Power connector (see figure 1) — Plug the external 12 VDC power supply into this two-pole captive screw connector. The
power supply is included with the unit. Figure 2 shows how to wire the connector.
Smooth
Ridges
A A
Power Supply
Output Cord
Figure 2. Power Connector Wiring
Distribution Amplifier
OUTPUTS
BAL
L 2 R L 3 R
ON
1 2 3
1 2 3
UNBAL
3 3 3 4 4 4
Audio Outputs Connectors
3
Balanced/Unbalanced DIP Switches
4
SECTION A–A
Tie Wrap
0.3 inch (7 mm) MAX
Orange Captive Screw
Connector
MDA 3A
5 5 5
Front
MDA 3A
Power LED
5
POWER
INPUT
12V
.3A MAX
L R L 1 R
1 1 1 2 2 2
Rear
ATTENTION:
•
If not provided with a power supply, this product is
intended to be supplied by a UL Listed power source
marked "Class 2" or "LPS", rated output 5Vdc min.
0.5A.
•
Si ce produit n'est pas fourni avec une source
d'alimentation, il doit être alimenté par une source
d'alimentation certifiée UL de classe 2 ou LPS, avec
une tension nominale 5 Vcc, 0,5 A minimum.
Distribution Amplifier
OUTPUTS
BAL
L 2 R L 3 R
ON
1 2 3
1 2 3
UNBAL
3 3 3 4 4 4
1