Extron electronics ASA Series Manuale utente

ASA 204 and ASA 304 • User Guide

About the ASA Series

The Extron ASA series high-performance audio summing ampliﬁers convert stereo audio signals into balanced or

unbalanced mono signals. The series consists of the following two models:

• ASA 204 — The ASA 204 has four independent active summing amps with four pairs of RCA connectors for

unbalanced line level stereo audio inputs. The unit has captive screw connectors for four balanced or unbalanced

mono outputs. Because of its input/output configuration, the ASA 204 can also function as an unbalanced to

balanced audio converter.

• ASA 304 — The ASA 304 has four independent active summing amps with four 5-pole captive screw connectors

for balanced or unbalanced line level stereo audio inputs. The unit has captive screw connectors for four balanced or

unbalanced mono outputs.

The ASA 204 and ASA 304 include an external 12V power supply that accepts 100-240VAC input.

Features

• Four, independent active audio summing amplifiers in a single enclosure

• Stereo inputs on RCA connectors, mono output on captive screw connectors

• Converts stereo audio to balanced or unbalanced mono audio

• ±6 dB output gain switch

• Rack-mountable 1U, quarter rack width metal enclosure

• Extron Everlast Power Supply (included) is covered by a 7-year parts and labor warranty

Installation and Operation

Mounting the ASA 204 and ASA 304

The ASA 204 and ASA 304 can be set on a table, or mounted on a rack shelf, under a desk or tabletop, or on a projector

mount.

Tabletop placement

Attach the four provided rubber feet to the bottom of the unit and place it on a convenient tabletop location.

Rack mounting

For optional rack mounting, do not install the rubber feet. Mount the ASA on a 19” 1U rack shelf or a standard universal

1U rack shelf. On the standard rack shelf, the ASA mounts in one of four locations to the rear of the rack or in one of four

locations to the front of the rack.

1. Remove rubber feet if they were previously installed on the

bottom of the ASA.

2. Mount the ASA on the rack shelf, using two 4-40 x 3/16”

screws in opposite (diagonal) corners to secure the amplifier

to the shelf.

3. Install blank panels or other units on the rack shelf (see the

image on the right).

4. Attach the rack shelf to the rack using the supplied bolts.

NOTE: Most 1U rack-mountable Extron products can be

mounted on the standard shelf.

ASA 204 and ASA 304 • User Guide (Continued)

ASA 204/ASA 304 Front Panel Features

1Power LED — Lights to indicate that the ASA is on.

Figure 1. ASA 204 and ASA 304 Front Panel

ASA 204/ASA 304 Rear Panel Features and Cabling

POWER

12V

.2A MAX

STEREO INPUTS MONO OUTPUTS

BAL

UNBAL

SPARE

QUAD AUDIO

SUMMING

AMPLIFIERS

ASA

204

11 22

STEREO INPUTS

BAL

UNBAL

SPARE

MONO OUTPUTS

ASA

304

LR LR

POWER

12V

.2A MAX

QUAD AUDIO

SUMMING

AMPLIFIERS

LR LR

1122

333

Figure 2. ASA 204 Rear Panel Figure 3. ASA 304 Rear Panel

1Input Connector 3Output gain DIP switch

2Output Connector 4Power connector

Balanced Audio Output

Tip

Ring

Tip

Ring

Slee

ves

Unbalanced Audio Output

Tip

No Ground Here

Tip

Sleeves

Unbalanced Audio InputBalanced Audio Input

Tip

Ring

Tip

Ring

Slee

ves

Tip

Sleeve

Tip

Do not tin the wires!

RCA Connector

Sleeve ( )

Ring(R)

Tip(L)

Wire the audio input and output connectors as shown at

right. Use the supplied tie wrap to strap the audio cable

to the extended tail of the connector.

ATTENTION:

• Connect the sleeve to ground (Gnd). Connecting the sleeve to a negative (-) terminal will damage the audio

output circuits.

• Connectez le manchon à la borne de terre (Gnd). Connecter le manchon à une borne négative(-) endommagera

les circuits de la sortie audio.

• For unbalanced outputs, do not connect wires to the “-” poles (see the Extron Audio Wiring Card).

• Pour les sorties asymétriques, ne connectez pas de câbles aux pôles « - » (voir le Audio Wiring Card d’Extron).

• The length of exposed wires is critical. The ideal length is 3/16 inch (5 mm).

• La longueur des câbles exposés est primordiale lorsque l’on entreprend de les dénuder. La longueur idéale est

de 5mm (3/16inches).

2 3

3Output gain DIP switch — Use this switch to set the audio output gain level.

Gain levels available via the switch vary depending on whether both inputs are receiving signals, and on the output

wiring, as shown in the table below.

Input Channel Output Output DIP Switch Settings

Left Right Wiring Unbalanced Balanced

signal signal balanced +9dB +3dB

signal —— balanced +3dB -3dB

—— signal balanced +3dB -3dB

signal signal unbalanced +3dB -3dB

signal —— unbalanced -3dB -9dB

—— signal unbalanced -3dB -9dB

4Power connector — An external 12 V power supply is included with the unit. Plug it into this 2-pole captive screw

connector. Wire the connector as shown below.

Rear Panel

Power Receptacle

DC Power Cord

Captive Screw

Connector

Ground

all devices.

External

Power Supply

(12 VDC, 0.5 A max.

)

– Return

+12 VDC input

Ridged

Smooth

Figure 4. Rear Panel 12 VDC Power Connector

CAUTION: The DC output cables must be kept separate from each other while the power supply is plugged in.

Remove power before wiring

AVERTISSEMENT : Les câbles de sortie CC doivent être séparés les uns des autres tant que la source

d’alimentation est branchée. Coupez l’alimentation avant d’effectuer les raccordements.

ATTENTION:

• Do not connect power to the amplifier until you have read the ATTENTION notifications.

• Ne branchez pas l’alimentation au l’amplificateur avant d’avoir lu les mises en garde « ATTENTION ».

• Always use a power supply supplied or specified by Extron. Use of an unauthorized power supply voids all

regulatory compliance certification and may cause damage to the supply and the end product.

• Utilisez toujours une source d’alimentation fournie ou recommandée par Extron. L’utilisation d’une source

d’alimentation non autorisée annule toute certification de conformité réglementaire et peut endommager la

source d’alimentation et l’unité.

• If not provided with a power supply, this product is intended to be supplied by a power source marked

“Class 2” or “LPS” and rated at 12VDC and a minimum of 0.5A.

• Si le produit n’est pas fourni avec une source d’alimentation, il doit être alimenté par une source

d’alimentation de classe 2 ou LPS, avec une tension nominale 12 Vcc, 0,5 A minimum.

68-776-01 Rev. D

11 18

www.extron.com

For information on safety guidelines, regulatory compliances, EMI/EMF compatibility, accessibility, and related topics,

see the Extron Safety and Regulatory Compliance Guide on the Extron website.

ATTENTION:

• The installation must always be in accordance with the applicable provisions of National Electrical Code

ANSI/NFPA 70, article 725 and the Canadian Electrical Code part 1, section 16. The power supply shall not

be permanently fixed to building structure or similar structure.

• Cette installation doit toujours être conforme aux dispositions applicables du Code américain de l’électricité

(National Electrical Code) ANSI/NFPA 70, article 725, et du Code canadien de l’électricité, partie1,

section16. La source d’alimentation ne devra pas être fixée de façon permanente à une structure de

bâtiment ou à une structure similaire.

• Power supply voltage polarity is critical. Incorrect voltage polarity can damage the power supply and the unit.

The ridges on the side of the cord (see ﬁgure4 on the previous page) identify the power cord negative lead.

• La polarité de la source d’alimentation est primordiale. Une polarité incorrecte pourrait endommager la

source d’alimentation et l’unité. Les stries sur le côté du cordon (voir ﬁgure4) permettent de repérer le pôle

négatif du cordon d’alimentation.

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

voltmeter.

• Pour vérifier la polarité avant la connexion, brancher l’alimentation hors charge et mesurer sa sortie avec un

voltmètre.

• The length of the exposed (stripped) wires is important. The ideal length is 3/16inch (5mm). Any longer

and the exposed wires may touch, causing a short circuit between them. Any shorter and the wires can be

easily pulled out even if tightly fastened by the captive screws.

• La longueur des câbles exposés est primordiale lorsque l’on entreprend de les dénuder. La longueur idéale

est de 5mm (3/16inches). S’ils sont trop longs, les câbles exposés pourraient se toucher et provoquer un

court circuit. S’ils sont trop courts, ils peuvent être tirés facilement, même s’ils sont correctement serrés par

les borniers à vis.

• Unless otherwise stated, the AC/DC adapters are not suitable for use in air handling spaces or in wall

cavities.

• Sauf mention contraire, les adaptateurs CA/CC ne conviennent pas à une utilisation dans les espaces

d’aération ou dans les cavités murales.

• Remote power is intended for indoors use only. No part of a network that uses remote power can be routed

outdoors.

• L’alimentation à distance est exclusivement réservée à un usage en intérieur. Un réseau utilisant une

alimentation à distance ne peut pas être routé en extérieur.

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