Atlas IED 307-12 User Manual

Specifications subject to change without notice

© 2001 Atlas Sound LP Printed in U.S.A. 000501 SL10-1098

397

TEN

1601 JACK MCKAY BLVD. / ENNIS, TEXAS 75119 U.S.A. / TELEPHONE: [phone] / FAX [phone]

SECTIONAL WALL CABINETS

WITH 12", 15", AND 18" DEEP CENTER SECTION

300B Series
320B Series
340B Series

320-21B

340-42B

FEATURES

• Sturdy Wall-Mount Cabinet Protects Equipment and Saves
Valuable Floor Space

• Selection Includes Models with 12", 15", and 18"D Center
Mounting Sections

• Reinforced Frame Flanges, Plus Corner-Brace Structural Supports and
Electric-Welded Seams & Miters Provide Stability for Mounted Equipment

• Punched Vents Assure Heat Dissipation

• Wire Management Provisions Allow Organized Wire Access

• Adjustable Mounting Rails Provide Flexibility

• Choice of Standard Solid, Optional Plexiglass, or Optional
Vented Door Styles Meet Application Needs

APPLICATIONS

The 300B, 320B and 340B Series cabinets have been engineered to pro­vide full functional and mechanical flexibility for wall-mounting standard
19" wide rack equipment. Sectional assemblies may be installed to
accommodate right or left-hand hinging applications, and are ideal for
use in areas with limited floor space or "protected" access requirements.
Units are commonly used to house electronic switching, monitoring,
sound and communication controls in school auditoriums, health care
facilities, presentation/conference centers, manufacturing facilities, labo­ratories, public buildings, and recreational complexes. They can also be
used to house computer control equipment, studio electronics, and build­ing management/security systems in commercial, industrial, institutional,
and military applications.

GENERAL DESCRIPTION

Series 300B, 320B and 340B Series wall cabinets are distinguished by
center-section depths of 12", 15", and 18", respectively. Basic model
includes three, 16-gauge CRS sections which include a 2" deep, solid­steel front door, a 12", 15", or 18"D center section with adjustable mount­ing rails, and a 4

1

⁄2"D rear door. Panel space openings range from 121⁄4" to
613⁄8". Enclosures are equipped with convenient and useful provisions for
custom cabinet mounting, wire management, equipment mounting, and
structural support. (See page 2 for detailed information.) Cabinet is fin­ished in #962 black epoxy.

W/DOOR W/O DOOR PANEL RACK CABINET O.D. SECTION DEPTH** OPTIONAL DOOR***

12" CTR MODELS OPENING* UNIT WIDTH HEIGHT REAR CENTER 4" Deep 2" Deep †

300-12B N/A 123⁄8"7 15

1

⁄4"—302-12SD

300-17B 300-17LDB 175⁄8"10 20

1

⁄2" 304-17B 302-17(SD)(P)(V

)

300-21B 300-21LDB 211⁄8" 12 24" 304-21B 302-21(SD)(P)(V

)

300-28B 300-28LDB 281⁄8"1620

5

⁄8" 31" 41⁄2" 12" 304-28B 302-28(SD)(P)(V

)

300-42B 300-42LDB 421⁄8" 24 45" 304-42B 302-42(SD)(P)(V

)

300-61B 300-61LDB 613⁄8"35 64

1

⁄4" 304-61B 302-61(SD)(P)(V

)

15" CTR. MODELS

320-17B 320-17LDB 175⁄8"10 20

1

⁄2" 304-17B 302-17(P)(V)

320-21B 320-21LDB 211⁄8" 12 24" 304-21B 302-21(P)(V)
320-28B 320-28LDB 281⁄8"1620

5

⁄8" 31" 41⁄2" 15" 304-28B 302-28(P)(V)

320-42B 320-42LDB 421⁄8" 24 45" 304-42B 302-42(P)(V)
320-61B 320-61LDB 613⁄8"35 64

1

⁄4" 304-61B 302-61(P)(V)

18" CTR. MODELS

340-17B 340-17LDB 175⁄8"10 20

1

⁄2" 304-17B 302-17(P)(V)

340-21B 340-21LDB 211⁄8" 12 24" 304-21B 302-21(P)(V)
340-28B 340-28LDB 281⁄8"1620

5

⁄8" 31" 41⁄2" 18" 304-28B 302-28(P)(V)

340-42B 340-42LDB 421⁄8" 24 45" 304-42B 302-42(P)(V)
340-61B 340-61LDB 613⁄8"35 64

1

⁄4" 304-61B 302-61(P)(V)

* Listed panel opening allows 1⁄16" clearance at top and bottom (1⁄8" total). ** Non-LDB Models include a 2" deep steel front door *** Mounts LDB Series only.
† Suffix model with P (plexiglass) or V (vented steel).

Specifications subject to change without notice

© 2001 Atlas Sound LP Printed in U.S.A. 000501 SL10-1098

1601 JACK MCKAY BLVD. / ENNIS, TEXAS 75119 U.S.A. / TELEPHONE: [phone] / FAX [phone]

Mounting Provisions

Mounting holes located on the back panel of the rear door, enable the pre-assembled cabi­net to be easily secured to a wall, post, support, or other surfaces for elevated applications.
(See Fig. 1) These convenient cabinets are designed for right-hand hinging applications,
but assemblies can be inverted 180° to facilitate left-hand hinging. Rear section hinges are
bolted, not welded, to ensure easy retrofit capability. The removable pin-type hinges holding
the center and rear sections together facilitate independent pre-installation of the rear sec­tion. This feature also permits efficient surface or recess installation. Models with panel
heights of 12

1

⁄4", 175⁄8", and 211⁄8" have two hinges; while 281⁄8", 421⁄8", and 613⁄8" panel space

cabinets each have three hinges.

Equipment Mounting & Wiring

All Models include one pair of 11-ga. adjustable front-to-rear mounting rails which are
tapped 10–32, and manufactured to standard E.I.A.

5

⁄8"–5⁄8"–1⁄2" spacing. Models with panel
space openings of 281⁄8", 421⁄8", and 613⁄8" are equipped with center section mounting rail
supports (1 per side) which have slotted cutouts for infinite adjustment of mounting rails and
open raceways for containing vertically run wire and cable. Smaller models do not require
mounting rail supports. Corner brace supports, which straddle the back and side panel of
the rear section (hinge side), also feature round (11⁄4" dia.) wire access holes for harnessing
excess wire. The back panel of the rear section is equipped with 1⁄4" D boss detents which
give contractors field flexibility to screw-mount a plywood, aluminum, or steel subplate (by
others) for mounting accessories, such as transformers, power strips, and phone relay sys­tems inside the cabinet. Boss detents are on 12" centers and vary depending upon model
height (175⁄8", 211⁄8", 281⁄8" panel space models have four detents, 421⁄8" panel space models
have six detents and 613⁄8" panel space models have eight detents.) (See Fig. 2) Note:
Model 300-12 does not have provisions for mounting subplate.

Conduit Knockouts

All Series models have 20 conduit knockouts on the rear section, with the exception of the
300-12B which has 16. Conduit arrays are located at the top and bottom of the back panel
(except 300-12B which has a centered array), as well as on the top and bottom back flanges.
Panel arrays consist of four knockouts: two 1" (25mm) standard, and two,

1

⁄2" (13mm) / 3⁄4"
(19mm) concentric. Top and bottom flange arrays are comprised of six knockouts: three, 1"
(25mm) standard, and three, 1⁄2" (13mm) / 3⁄4" (19mm) (See Fig. 2).

Ventilation

Stamped perforated vents, located on both sides (top and bottom) of the center section, pro­vide maximum ventilation for rack-mounted electronics. (Four vent patterns per side on 300B
Series, eight per side on 320B & 340B Series).

Structural Support

Series 300B, 320B and 340B cabinets offer exceptional structural support. The units' one­piece front and rear sections are strengthened with frame flanges on bottom, top, and sides.
Center sections also have "L"-shaped gussets (brackets) which are plug-welded, joining bottom
and top panels to side panels. Series 300B, 320B, and 340B have a total of 8, 12, and 16
brackets, respectively. Rear sections have corner brace supports which bridge the back and
side panel (hinge side) giving the back (mounted) panel extra reinforcement for tension relief.
(See Fig. 3) Units also have electric-welded seams and miters which bolster the cabinets'
overall bonding. The center section offers maximum reinforcement provisions, such as a
uniquely designed center section guide plate that reduces potential sagging by distributing cab­inet and equipment weight to rear section.The 11-ga., 1-

7

⁄8" W guide plate, which mounts to the

rear section's bottom flange, provides a

3

⁄4" lip which gives added support to the center section
when the cabinet is open or closed. The plate also ensures that an equipment-weighted center
section will close properly, by "guiding" alignment pins into respective holes.

Standard Door

Series 300B, 320B and 340B cabinets include a 2" (51mm) deep, steel front door equipped
with a cylinder lock. All models, with the exception of the 300-12, can be ordered without a
front door (LDB Series). LDB Series Models will accommodate optional door Series
302(V)(P)(SD) or 304 (see optional accessories).

Fig. 1: Rear Section Mounting Holes &

Knockouts

(Note: -61 Models have 8 mounting holes)

Fig. 2: Rear Section Top & Bottom Flange

Conduit Knockout Array

Fig. 3: Rear Section Featuring Optional
Subplate (by others) and Guide Plate

BOSS DETENTS
FACILITATE FIELD
INSTALLATION OF
A PLYWOOD,
ALUMINUM, OR
STEEL SUBPLATE
(BY OTHERS) FOR
MOUNTING
ACCESSORIES.

Guide
Plate for
Center
Section

Mounting
Subplate
(Plywood,
Aluminum,
Steel)

Corner
Brace
Supports

12"

Specifications subject to change without notice

© 2001 Atlas Sound LP Printed in U.S.A. 000501 SL10-1098

399

TEN

1601 JACK MCKAY BLVD. / ENNIS, TEXAS 75119 U.S.A. / TELEPHONE: [phone] / FAX [phone]

OPTIONAL ACCESSORIES
302/304B Series Doors. Optional Series 302 and 304B front doors are offered in depths of 2" and 4", respectively, and will accommodate

Series 300LDB, 320LDB, and 340LDB cabinets. Series 302 doors are available with a steel frame and a plexiglass front (P), vented steel
(V) front, or solid steel front (SD). Plexiglass models are ideal for applications where equipment operation must be monitored, but secured.
Vented steel doors are designed to dissipate heat. Solid door are ideal for situations where internal components are to be out-of-sight to
deter tampering. Extra-depth 304 Series doors provide added clearance for equipment with full-grip handles and protruding knobs. Series
304 doors are particularly useful when rails are adjusted in the far-forward position to accommodate extra-depth equipment.

CT31A

EJL-2

SERIES 300B, 320B, AND 340B OUTSIDE DIMENSIONS

MODEL* A B C
300-12B 15

1

⁄4

"12

1

⁄4

"

(387mm) (311mm)

300-17B
320-17B 201⁄2"17

5

⁄8"

340-17B (520mm) (448mm)
300-21B 12" 15" 18"
320-21B 24" 211⁄8" (304mm) (381mm) (457mm)
340-21B (610mm) (536mm) for for for
300-28B 300 320 340
320-28B 31" 28

1

⁄8" Series Series Series

340-28B (787mm) (714mm)
300-42B
320-42B 45" 421⁄8"
340-42B (1143mm) (1070mm)
300-61B
320-61B 64

1

⁄

4"61

3

⁄

8"

340-61B (1632mm) (1559mm)

20-5/8"

* LDB Series share the same dimensional characteristics, but do not

have an attached 2" deep steel front door.

CT31A. This optional heavy-duty caster support reduces the load
bearing requirements of the wall by supporting the center section
weight when opened and closed (typically used on 61" panel space
models). Cabinet must be mounted 6" from the ground. Support is
constructed of formed, 14-ga. CRS and includes heavy-duty, zinc­plated caster with a black, hard-tread wheel. The caster adjusts in
height from 5

1

⁄2" to 71⁄2" and is supplied with drilling template for easy

installation. Finished in black. (Note: Before installing the CT31A, the
center section guide plate must be removed.)(Only one CT31A
required per cabinet)

EJL-2. Replacement latch-bracket is designed for security applications
and features a standard size hole to accommodate customer-supplied

1

⁄4"

padlock. Bracket is constructed of 11-ga. CRS and mounts into existing
latch holes after standard cylinder lock is removed.

OPTIONAL FRONT DOORS FOR SERIES 300B, 320B, AND 340B CABINETS

2"D MODEL 4"D MODEL MOUNTS

SOLID / VENTED PLEX SOLID STEEL HEIGHT CABINET MODEL(S)

302-12SD / NA . - - 15

1

⁄4" 302-12B

302-17SD / 302-17V 302-17P 304-17B 201⁄2" 300-17LDB, 320-17LDB, 340-17LDB
302-21SD / 302-21V 302-21P 304-21B 24" 300-21LDB, 320-21LDB, 340-21LDB
302-28SD / 302-28V 302-28P 304-28B 31" 300-28LDB, 320-28LDB, 340-28LDB
302-42SD / 302-42V 302-42P 304-42B 45" 300-42LDB, 320-42LDB, 340-42LDB
302-61SD / 302-61V 302-61P 304-61B 64

1

⁄4" 300-61LDB, 320-61LDB, 340-61LDB

20-5/8"

C

A

B

4-1

/2

"

19-1/8"

2"

Specifications subject to change without notice

© 2001 Atlas Sound LP Printed in U.S.A. 000501 SL10-1098

1601 JACK MCKAY BLVD. / ENNIS, TEXAS 75119 U.S.A. / TELEPHONE: [phone] / FAX [phone]

A) Mounting Rail Supports

B) Corner Brace Supports

C) Adjustable Front-to-Back Mounting Rails

(Standard E.I.A. Spacing)

D) Center Section Guide Plate

E) Optional Model CT31A Caster Support

(Requires the cabinet to be mounted 6" from the floor.)

Minimum mounting space required to facilitate opening center

section 90° with front door open.

Minimum mounting space required to facilitate opening center

section 90° with front door closed.

The sectional wall mounting cabinet shall be Atlas Sound Model
______ (suffix Model with "LDB" for cabinet less front door). It shall
be constructed of 16-gauge CRS throughout. Hinges shall be bolted,
not welded. All sections shall be of one-piece construction with elec­tric-welded seams and miters. Cabinet shall have provisions which
allow the unit to be inverted for accommodating left-hand hinging
applications. Rear section shall have concentric

1

⁄2

" (13mm) and

3

⁄4

"
(19mm) knockouts on the top and bottom surface panel, as well as
the flange panels at the top and bottom of the rear panel. Center sec­tion shall be secured with screw-type locking rods and alignment pins.
The center section shall be equipped with adjustable, front-to-rear
mounting rails tapped with 10–32 holes on E.I.A. 19" spacing. Units

shall have slotted rail supports for mounting rail adjustment and wire
management purposes. Standard front door shall be 2" (51mm) deep,
and constructed of one-piece 16-ga. CRS, with perforation vents and
cylinder lock. Optional 4" deep vented steel front door shall be Atlas
Sound Model _______ (304B Series). Optional 2" deep front door
shall be vented steel Model ________ (302V Series), plexiglass
Model _______ (302P Series) or solid steel Model ______ (302SD)
Series. Optional caster support shall be _______(Model CT31A).
Optional replacement latch shall be _______ (Model EJL-2).

ARCHITECT AND ENGINEER SPECIFICATIONS

Fig. 5 Fig. 6

INSTALLATION

Installation Placement Considerations

• Determine Left/Right Swing Distance to Adjacent Walls

• Decide if optional caster support Model CT31A will be

used to reduce wall load-bearing requirements
(recommended on 61" and some 42" panel space
cabinet installations). If the caster will be used, cabinet
must be mounted 6" from the floor.

6"