Extron electronics SM 28 Manuale utente

Product Category

SM 28 • Setup Guide

WARNING: Installation and service must be performed by experienced personnel only.

AVERTISSEMENT : L’installation et l’entretien doivent être effectués par le personnel autorisé uniquement.

NOTE: Unless otherwise stated, mounting hardware is not included.

This setup guide contains installation information about the Extron SpeedMount®SM 28 speaker.

Installing the Speaker Mounting Plate

The SM 28 speaker comes with a at mounting plate and an adapter for positioning the speaker 10° up, down, left, or right.

•0° mounting plate — The flat (0°) mounting plate allows the speaker to be mounted flat on a suitable surface.

•10° mounting adapter — The 10° mounting adapter allows the speaker to be installed at a 10° angle so that the speaker can

point up, down, left, or right from an elevated position by rotating the adapter.

Install the mounting plate vertically or horizontally as shown below right.

NOTES:

• Observe all applicable building codes and local ordinances when installing the speaker.

• If mounting the SM 28 with the yoke mount, see the SM 28 Yoke Mount Kit Setup Guide.

Mounting to a Wall Stud

1. Locate the wall stud where the mounting plate will be installed.

2. If using the 10° mounting adapter, position the adapter over the

wall stud according to how the speaker will be angled and mark

the positions of the pilot holes. See the figure below for

mounting hole locations.

If not using the

adapter, position

the mounting plate

against the wall.

The #28 arrow, as

shown on the right,

molded into the

mounting plate

indicates the vertical

midpoint of the SM 28 speaker when it is placed on the mount. While

positioning the mounting plate on the wall, mark the location of two pilot holes

using the holes indicated above.

Mounting

Holes

33-0000-01Rev.Ax1

–

LOOP

–

LOOP

SM28 Speaker

Stud

Mounting

Holes

0° Mounting Plate

10° Mounting Adapter

Catch Tab

Vertical Mounting Horizontal Mounting

SM 28 • Setup Guide (Continued)

NOTE: A speaker wire access hole (see the following figures) must also be cut in the wall. Mark the hole location now

with the mounting plate positioned on the wall while ensuring that the wall stud does not interfere with the wire routing

and that the mounting plate hides the access hole.

3. Drill the mounting plate pilot holes and cut the speaker wire access hole, as previously marked.

4. Install the speaker cables into the wall before installing the speaker mounting plate. Leave enough slack in the cable.

5. Install the mounting plate.

NOTE: Since applications can vary considerably, exercise good judgment when selecting the mounting location,

method, and hardware. Mounting hardware is not provided.

• If using the 10° mounting adapter, route the speaker cable through the adapter and 0° mounting plate. Next, attach the

adapter to the 0° mounting plate using the four included screws and washers, and then attach the wire ends to the quick

connect contacts using a small screwdriver. Be sure to observe the correct polarity. Attach the mounting plate to the wall (see

the figure below).

If using only the flat plate, route the speaker cable through the rear of the mounting plate and attach the wire ends to the

quick connect contacts using a small screwdriver. Be sure to observe the correct polarity, as shown below. Attach the

mounting plate to the wall (see the figure above).

10° Mounting

Adapter

0° Mounting Plate (4) 4-40 x 3/16"

Screws

Quick Connect Contacts

Mounting Scr

ews

Red Wire (+) from Ampliﬁer

Black Wire (-) from Ampliﬁer

Red Wire (+) from

Ampliﬁer/Previous Speaker

Red Wire (+) to Next Speaker

Black Wire (-) from

Ampliﬁer/Previous Speaker

Black Wire (-) to Next Speaker

LOOPIN INLOOP

Loop-through Connection Single Speaker Connection

Number of Wires

per Connection Point Maximum

Wire Gauge

1 12 AWG

2 16 AWG

4 18 AWG

Wire Gauge Table

Product Category

NOTE: If surface mounting, route the wires through

alternate access points as shown at right.

ATTENTION: Use the appropriate mounting screws. The screw heads must

not protrude more than 0.27 inch (7 mm) above the screw holes in the

mounting plate (see the gure on the right). If the screw head protrudes too far

above the mounting plate surface, damage to the speaker may occur when

the speaker is attached.

Attaching a Secondary Support Cable

If a secondary support cable is being attached, attach the cable to the eye bolt, as shown

below. The cable end should be properly swaged.

Attaching the Speaker to the Mounting Plate

ATTENTION: By default, the SM 28 speaker is shipped unlocked. When mounting the speaker

to the mounting plate, be sure that the speaker is unlocked. Failure to place the speaker in

the unlocked position prior to mounting the speaker will result in damage to the speaker

lock mechanism (see Using the Security Key to Lock and Unlock the Speaker on the next

page).

NOTE: If a secondary attachment point is being used, see the “Attaching a Secondary Support

Cable” section above for installation details before proceeding further.

Position the rear mounting slot of the speaker above the catch tab of the mounting plate, then slide the

speaker down into the mounting plate until a click is heard indicating that the speaker is secured in place

(see gure at right). When properly seated, the speaker connections are automatically made.

Secondary

Attachment

Cable

Anchor this end to a

suitable secure point.

ttach cable here

and secur

Catch Tab

0.47"

(12 mm)

0.27"

(7 mm)

Goo

Bad

0° Mounting Plate

Alternate Access Point Alternate Access Points

10° Mounting Adapter

33-0000-01Rev. Ax1

–

LOOP

–

LOOP

68-2165-50

Rev. A

03 15

Extron Headquarters

+1.800.633.9876 (Inside USA/Canada Only)

Extron USA - West Extron USA - East

+1.714.491.1500 +1.919.850.1000

+1.714.491.1517 FAX +1.919.850.1001 FAX

Extron Europe

+800.3987.6673

(Inside Europe Only)

+31.33.453.4040

+31.33.453.4050 FAX

Extron Asia

+65.6383.4400

+65.6383.4664 FAX

Extron Japan

+81.3.3511.7655

+81.3.3511.7656 FAX

Extron China

+86.21.3760.1568

+86.21.3760.1566 FAX

Extron Middle East

+971.4.299.1800

+971.4.299.1880 FAX

Extron Korea

+82.2.3444.1571

+82.2.3444.1575 FAX

Extron India

1800.3070.3777

(Inside India Only)

+91.80.3055.3777

+91.80.3055.3737 FAX

Setting the Tap Selector Switch (SM 28T Model Only)

For the SM 28T model, insert a small screwdriver through the upper left portion of the front grille, as shown below, to adjust the

tap selector switch to the desired setting.

Using the Security Key to Lock and Unlock the Speaker

Insert the key into the center of the speaker grille and

turn the key, as needed, so that the speaker is in the

unlocked position (see the gure at right). There are

three small raised “dimples” (see the gure at right) on

the grille surface that surrounds the keyhole.

Repeat this procedure, but set the key to the locked

position to lock the speaker.

ATTENTION: The key must be rotated to the

unlocked position before the speaker is attached

to the mounting plate. Failure to place the speaker

in the unlocked position will result in damage to

the speaker lock mechanism should an attempt be

made to mount the speaker. By default, the SM 28

speaker is shipped unlocked.

Removing the Speaker from the Mounting Plate

To remove the speaker from the mounting plate, unlatch the

locking mechanism.

1. Insert the security key into the keyhole of the speaker grille (see the previous

section) and turn the key to the unlock position.

2. Remove the security key.

3. Apply pressure to the grille with your finger over the “dimpled” keyhole to

unlatch the speaker from the mounting plate while lifting up on the speaker

(see figure at right).

ATTENTION: To avoid damaging or scratching the grille nish, do not

use tools or sharp instruments to depress the unlocking mechanism

hidden behind the center of the grille.

Press to Release

8Ω

100

8Ω

Tap Indicator

for 70 volt

Tap Indicator

for 100 volt

Unlocked

Twist to

Lock/Unlock

Unlocked Locked

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