Extron electronics XPA U 3502 Manuel utilisateur

XPA U 3502 • Setup Guide

The Extron XPA U 3502 is a 2-channel audio power ampliﬁer for use in low-impedance speaker systems.

The XPA U 3502 is 1U high, half rack width, and rack mountable. The ampliﬁer has mounting holes for 9” and deeper rack shelves, and

is plenum-rated with an optional ﬂex conduit adaptor. The unit is convection cooled.

This guide provides instructions for an experienced installer to set up and operate the XPA U 3502 power ampliﬁer. For full installation,

conﬁguration, and operation details, see the XPA U 3502 User Guide available at www.extron.com.

Installation Steps

Step 1 — Mounting

Turn off all of the equipment and disconnect it from the power source. Mount the ampliﬁer as required; the unit can be securely

mounted in a variety of locations using optional Extron Mounting Brackets and accessories (see the Extron website for compatible

optional mounting accessories) or using the included 3-piece bracket system. The brackets do not come attached to the ampliﬁer.

Below are two methods of rack mounting the ampliﬁers.

Rack Ear Mounting (Single Unit)

The XPA U 3502 ships with a set of rack ears, allowing the ampliﬁer to be installed in a full rack-width space. Mount the ampliﬁer with

rack ears as follows:

1. If the ampliﬁer has its ﬂat bottom rubber feet installed, remove them.

2. Attach the rack ears to the sides with the four provided #6 machine screws (1).

3. Insert the ampliﬁer into the rack and align the holes in the rack ears with the holes on the rack.

4. Secure the ampliﬁer to the rack using the four provided 10-32 x 3/4” screws (2).

XPAU 3502

POWERAMPLIFIERS

OVER

TEMP LIMITER/PROTECT

SIGNAL

XPAU 3502

POWERAMPLIFIERS

OVER

TEMP LIMITER/PROTECT

SIGNAL

Figure 1. XPA U 3502 Rack Ear Mounting

Bridge Plate Rack Mounting (Side-by-Side)

The XPA U 3502 ships with a bridge plate connector to connect two ampliﬁers together and form a full rack-width unit. Mount and

connect two ampliﬁers as follows:

1. If the ampliﬁer has its ﬂat bottom rubber feet installed, remove them.

2. Position two ampliﬁers upside down and next to each other as shown below.

3. Use the bridge plate connector and the four provided #4 machine screws to connect the two units together (1).

4. Attach the two short rack ears to the units with the four provided #6 machine screws (2).

5. Insert the ampliﬁer into the rack and align the holes in the rack ears with the holes on the rack.

6. Secure the ampliﬁer to the rack using the four provided 10-32 x 3/4” screws (3).

IMPORTANT:

Go to www.extron.com for the

complete user guide, installation

instructions, and specifications.

XPA U 3502

POWERAMPLIFIERS

OVER

TEMP LIMITER/PROTECT

SIGNAL

XPA U 3502

POWERAMPLIFIERS

OVER

TEMP LIMITER/PROTECT

SIGNAL

Mounting

screws (4)

XPAU 3502

POWERAMPLIFIERS

1 2

OVER

TEMP LIMITER/PROTECT

SIGNAL

XPAU 3502

POWERAMPLIFIERS

1 2

OVER

TEMP LIMITER/PROTECT

SIGNAL

Figure 2. XPA U 3502 Bridge Plate Rack Mounting

Ventilation Recommendation

Excessive heat can decrease a power ampliﬁer’s lifetime. An

Over Temp LED indicator on the front panel lights red when the

maximum recommended operating temperature of +122 °F (+50

°C) has been surpassed.

To minimize the chances of overheating, the ampliﬁer should

be arranged in a rack so that the evironment does not reach

or surpass +122 °F (+50 °C). See the image to the right for the

optimal way to arrange the XPA U 3502. No more than four stacks

of ampliﬁers in a one-on-top-of-the-other arrangement should

occur without an open between the stacks.

The XPA U 3502 can also be arranged directly above or below a

non-XPA Ultra device, but in any case, the environment should still

not reach or exceed +122 °F (+50 °C).

Vent Space

XPA U 3502 • Setup Guide (Continued)

Set Ampliﬁer Output Mode

Step 2 — Rear Panel Conﬁguration

Follow the instructions below to learn how to conﬁgure the rear panel for the XPA U 3502.

• Wire the source output to the Line Input 3.5mm captive screw port as shown below. Figure 3 shows both balanced and

unbalanced inputs.

ATTENTIONS:

• Do not tie channel output pins to each other or to ground. Doing so will short out the outputs, damage the ampliﬁer, or

both.

• Ne pas lier les sorties 1 et 2 des canaux entre elles ou à la terre. Les sorties pourraient être court-circuitées et/ou

l’ampliﬁcateur pourrait être endommagé.

• To avoid risk of damage to the ampliﬁer or the speakers, only connect low-impedance speaker loads (8Ω/4Ω) to the

appropriately marked output connectors on the ampliﬁer.

• Pour éviter tout risque de détérioration de l’ampliﬁcateur ou des enceintes, connectez toujours les charges de l’enceinte

faible impédance (8Ω/4Ω) aux connecteurs de sortie correctement identiﬁés sur l’ampliﬁcateur.

NOTE: You must use Class 2 wiring for the ampliﬁed outputs to comply with UL requirements.

"(5 mm) MAX.

Do not tin

the wires!

100-240V 1.5A, 50-60 Hz

∞

12 1

GCV

STANDBY

SIGNAL

LIMITER/

PROTECT

LIMITER/

PROTECT

ATTENUATION INPUTSREMOTE

XPA U 3502

CLASS 2 WIRING

OUTPUTS

8Ω/4Ω

CH 2

Ster

eo 8Ω or 4Ω

Speaker Loads

Wire output connector

to speaker loads as

shown below

Wire CH 1 and CH 2

input connector based

on source as shown below

Use both CH 1 and CH 2

Attenuators (set

levels independently)

CH 1

Figure 3. XPA 3502 Output Configuration

Step 3 — Remote Ports

STANDBY

GV C

REMOTE

Figure 4. Remote Volume Control and Standby Ports

The 3.5 mm 5-pin captive screw remote control ports (shown above) are used to control volume on channel 1 on pins 1, 2, and 3,

and standby mode through contact closure on the pins 4 and 5. The upper, 3-pin captive screw remote control port is used to control

volume on channel 2.

The volume control ports can be wired to Extron remote volume controllers such as an Extron VCM 200 series and MLC 64 RS VC D

controllers, or Extron Control products with the digital Remote Volume Control Port, such as the MLC 100 Plus and IPCP Pro 255. For

more details on wiring the volume control ports see the XPA U 3502 User Guide.

XPA U 3502 • Setup Guide (Continued)

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.

All trademarks mentioned are the property of their respective owners.

Worldwide Headquarters: Extron USA West, 1025 E. Ball Road, Anaheim, CA 92805, 800.633.9876

When the STANDBY pin (pin 5) is shorted to ground (Pin 4), the amplifier goes into standby mode. Standby mode turns off all the

outputs, although the amplifier still receives power. The power LED on the front panel lights amber when the amplifier is in Standby

mode.

NOTE: A 10k ohm resistor is included with the amplifier. If the resistor is connected between the STANDBY and Ground

pin, the auto-standby timer is suppressed. The STANDBY pin can still be shorted to the Ground pin to put the amplifier in

standby.

Step 4 — Powering on Equipment

ATTENTION:

• The ampliﬁer must be powered on last.

• L’ampliﬁcateur doit être mis sous tension en dernier.

Reconnect all the power cables and switch on all of the other equipment before attaching the IEC power cable and powering on the

unit. The power LED will light green.

Step 5 — Adjusting Attenuation

NOTE: Set the volume control on the connected control device(s) to maximum and ensure that the amplifier

is not currently forced into standby mode via the standby pin prior to making adjustments.

Adjust audio attenuation using the rear panel adjustment attenuators as seen to the right.

See Rear Panel Features in the XPA U 3502 User Guide for more information.

ATTENTION:

• The default position of all potentiometers when shipped is turned fully counter-clockwise (fully attenuated).

• La position par défaut de tous les potentiomètres lors de leur expédition est orientée vers le sens antihoraire (atténuation

complète).

• Do not use a screwdriver to adjust the potentiometers. The potentiometers should only be adjusted as needed using the

included tweeker (small screwdriver).

• Ne pas utiliser de tournevis pour ajuster les potentiomètres. Les potentiomètres doivent uniquement être ajustés selon les

besoins avec le petit tournevis fourni.

• While potentiometer tuning knobs may look like screws, they do not function in the same manner. Use a light touch when

adjusting to avoid applying excessive torque to the potentiometers.

• Bien que les boutons de réglage du potentiomètre ressemblent à des vis, ils n’ont pas la même fonction. Exercez une

pression légère lors du réglage aﬁn d’éviter un serrage excessif des potentiomètres.

• Applying excessive torque can mechanically damage the potentiometer, rendering it inoperable and voiding the product

warranty.

• Un serrage excessif peut endommager le potentiomètre, le rendant inutilisable et annulant la garantie du produit.

Step 6 — Checking LEDs

Check the Limiter/Protect and Signal LEDs on the front and rear panels to see if any problems are encountered (see Front Panel

Features and Troubleshooting in the XPA U 3502 User Guide for more information).

∞

ATTENUATION

68-3545-50 Rev. A

04 21

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