Peavey A-A-AC8 Operating Manual

A/A-AC8

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Intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure
that may be of sufficient magnitude to constitute a risk of electric shock to persons.

Intended to alert the user of the presence of important operating and maintenance (servicing) instructions in the
literature accompanying the product.

CAUTION: Risk of electrical shock – DO NOT OPEN!
CAUTION: To reduce the risk of electric shock, do not remove cover. No user serviceable parts inside. Refer servicing to

qualified service personnel.
WARNING: To prevent electrical shock or fire hazard, do not expose this appliance to rain or moisture. Before using this

appliance, read the operating guide for further warnings.

Este símbolo tiene el propósito de alertar al usuario de la presencia de "(voltaje) peligroso" que no tiene
aislamiento dentro de la caja del producto que puede tener una magnitud suficiente como para constituir riesgo de
corrientazo.

Este símbolo tiene el propósito de alertar al usario de la presencia de instruccones importantes sobre la operación
y mantenimiento en la literatura que viene con el producto.

PRECAUCION: Riesgo de corrientazo – No abra.
PRECAUCION: Para disminuír el riesgo de corrientazo, no abra la cubierta. No hay piezas adentro que el usario pueda

reparar. Deje todo mantenimiento a los técnicos calificados.
ADVERTENCIA: Para evitar corrientazos o peligro de incendio, no deje expuesto a la lluvia o humedad este aparato

Antes de usar este aparato, lea más advertencias en la guía de operación.

Ce symbole est utilisé pur indiquer à l'utilisateur la présence à l'intérieur de ce produit de tension non-isolée
dangereuse pouvant être d'intensité suffisante pour constituer un risque de choc électrique.

Ce symbole est utilisé pour indiquer à l'utilisateur qu'il ou qu'elle trouvera d'importantes instructions sur
l'utilisation et l'entretien (service) de l'appareil dans la littérature accompagnant le produit.

ATTENTION: Risques de choc électrique – NE PAS OUVRIR!
ATTENTION: Afin de réduire le risque de choc électrique, ne pas enlever le couvercle. Il ne se trouve à l'intérieur

aucune pièce pouvant être réparée par l'utilisateur. Confier l'entretien à un personnel qualifié.
AVERTISSEMENT: Afin de prévenir les risques de décharge électrique ou de feu, n'exposez pas cet appareil à la pluie

ou à l'humidité. Avant d'utiliser cet appareil, lisez les avertissements supplémentaires situés dans le guide.

Dieses Symbol soll den Anwender vor unisolierten gefährlichen Spannungen innerhalb des Gehäuses warnen, die
von Ausreichender Stärke sind, um einen elektrischen Schlag verursachen zu können.

Dieses Symbol soll den Benutzer auf wichtige Instruktionen in der Bedienungsanleitung aufmerksam machen, die
Handhabung und Wartung des Produkts betreffen.

VORSICHT: Risiko – Elektrischer Schlag! Nicht öffnen!
VORSICHT: Um das Risiko eines elektrischen Schlages zu vermeiden, nicht die Abdeckung enfernen. Es befinden sich

keine Teile darin, die vom Anwender repariert werden könnten. Reparaturen nur von qualifiziertem Fachpersonal
durchführen lassen.

ACHTUNG: Um einen elektrischen Schlag oder Feuergefahr zu vermeiden, sollte dieses Gerät nicht dem Regen oder
Feuchtigkeit ausgesetzt werden. Vor Inbetriebnahme unbedingt die Bedienungsanleitung lesen.

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E N G L I S H

The A/A-AC8™ eight-channel amp controller provides the means for a MediaMatrix® system to monitor and
control up to eight amplifier channels. With MediaMatrix® amp control software, the A/A-AC8 will monitor an
amplifier’s load current and load voltage, determine the operational status of the amplifier, and control the
amplifier’s power on/off. Communications between the A/A-AC8 and the MediaMatrix system are accomplished
via a proprietary serial communications protocol over industry standard RS-485, which can operate up to lengths
of 4,000 feet.

Note: An RS-485 communications card is required in the MediaMatrix—contact Peavey Architectural Acoustics®
tech support for more information.

Communications between the A/A-AC8 and an amplifier are accomplished through a standard 8-conductor
RJ-45 telephone-type cable. The A/A-AC8 will communicate with any Peavey amplifier equipped with an ACI
module or an IDC™ 150TII.

Front Panel:

™

-2

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FRONT PANEL FEATURES
POWER LED (1)

Illuminates when unit is on.

NETWORK LED (2)

Illuminates when there is communication activity on the RS-485 network.

Rear Panel:

4

5a 5e

3

5d

5b

5c

67

REAR PANEL FEATURES
AC LINE CORD SOCKET (3)

Provided to accept the removable AC line cord.

8

9

POWER SWITCH (4)

Switch to “On” position to turn on. The red Power LED will illuminate indicating power is being supplied to the unit.

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2X16 PHOENIX-TYPE CONNECTOR (5)

a. RS-485 Network Communication Connections.
b. Monitor 1 and Monitor 2 Differential Audio inputs.
c. Monitor 1 and Monitor 2 Differential Audio outputs.
d. Parallel Command Interface (future use).
e. Analog amplifier Voltage, Current, and Status outputs (future use).

UNIT ID 8-PIN DIP (6)

Defines the unit location on the RS-485 network.

MONITOR 1 & MONITOR 2 INPUT TRIM POTS (7)

Determine the level of the Monitor Input signals that get mixed to the Monitor Outputs.

CHANNEL MONITOR TRIM POTS (8)

Determine the level of the amplifier signals that get mixed to the Monitor Outputs.

AMPLIFIER INPUTS (9)

RJ-45 connector inputs from an amplifier’s ACI-2 module.

CONNECTING THE A/A-AC8 TO THE MEDIAMATRIX SYSTEM

The A/A-AC8 communicates with the MediaMatrix system via an RS-485 multi-drop network. Communications
are half-duplex and require a two-conductor, shielded cable (24 AWG twisted pair telephone cable is
recommended).

Figure 1 shows an example of a MediaMatrix-A/A-AC8 RS-485 network.

figure 1

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The RS-485 network should be terminated with 120Ω resistors. This is especially important when the network
approaches its maximum length of 4,000 feet. A maximum of 32 A/A-AC8s may be connected to the
RS-485 network.

Figure 2 shows the wiring of an A/A-AC8 to the RS-485 network.

+

_

NET

NET

_

_

_

+

_

+

I

V

_

V

I

_

M

_

_

M

+
_

Phoenix Connector

(on back panel of AC8)

figure 2

SETTING THE UNIT ID 8-PIN DIP SWITCH

The Unit ID 8-pin DIP switch on the back of the A/A-AC8 defines the address of the unit in the RS-485 network.
The 8-pin DIP switch represents a binary number, with position 1 being the least significant bit, position 5 being
the most significant bit. (Only the first five switches are used.) The UP or ON position of a switch represents a
binary 1, while the DOWN or OFF position of a switch represents a binary 0. Notice that all switches OFF is
equivalent to binary 0, but in the MediaMatrix amp control software view file, this defines location 1 in the AC8
Network. Note that each A/A-AC8 in the RS-485 Network must have its own unique unit ID location.

Figure 3 shows some Unit ID switch examples.

Amp Control
MediaMatrix Unit ID

1

2

3

figure 3

Switch Position

12345678

O
N

12345678

O
N

12345678

O
N

Binary Value

0

1

2

CONNECTING AN AMPLIFIER TO THE A/A-AC8

The A/A-AC8 communicates with an amplifier through an 8-conductor RJ-45 telephone-type cable. The amplifier
must be equipped with an ACI-2 communications module. Communication with a dual channel (stereo) amplifier,
such as the IA™ 400, requires two A/A-AC8 channels. The communication cable from the dual channel amp must
be connected at the A/A-AC8’s Amplifier Interface to one of the DUAL CH1/2, CH3/4, CH5/6, CH7/8 inputs, and
the following input must remain unconnected. Single-channel (mono) amplifiers, such as the IDC™ 150TII,
require only one A/A-AC8 channel. Single-channel amps may be connected to any A/A-AC8 Amplifier Interface
input, except immediately following a dual channel amp input.

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AMPLIFIER AUDIO MONITORING

The A/A-AC8 allows monitoring of an amplifier’s audio signal. There are trim pots above each amplifier input
which adjust the level of the amp’s audio signal that gets mixed to the A/A-AC8's Monitor Outputs. The channel
trim pot’s 12 o’clock position corresponds to unity gain, with a maximum of +14 dB gain when fully clockwise.
Any amp channel’s audio signal can be routed to either of the two Monitor Outputs. The routing is accomplished
within the MediaMatrix amp control software view. The Monitor 1 and Monitor 2 outputs are differentially driven,
with a maximum output of +22 dBu. External audio inputs with trim pots (maximum unity gain) are provided for
each Monitor channel. These may be used to chain A/A-AC8 monitor busses so that only one set of monitor audio
cables need be routed to the control room.

Figure 4 shows a typical Amp Control audio monitor wiring using two-conductor, shielded audio cable.

figure 4

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