wheelock DB4 Service Manual

Speakers - Up to 25 Watts, Hazardous Location, Weatherproof

DB4 Range

Description:

This range of loudspeakers, intended for use in potentially explosive
gas and dust atmospheres, has a power rating of up to 25 watts and
is suitable for use in all gas groups including hydrogen.

The flamepaths, flare and the body, are manufactured completely
from a UV stable glass reinforced polyester. Stainless steel screws
and sinter are incorporated thus ensuring a corrosion free product.
A tapered flamepath is used to overcome the problems of assembly
of parallel spigot flamepaths.

This product does not include a blocking capacitor. Contact Cooper
Wheelock Technical Support for models with a blocking capacitor*.

*Coming Soon

15W/20W/25W (Long Flare)

Features*:

★ UL listed for USA and Canada:
– Class I, Div 2, Groups A-D.
– Class I, Zones 1, AExd IIC, T4
– Class II, Div 2, Groups F & G

★ ATEX approved
★ NEMA 4x & 6, IP66 and IP67
★ Certified temperature –67°F to +158°F (-55°C to

+70°C)

★ GRP corrosion-free flamepaths
★ 109dBA at 25 watts at 10 feet
★ 8, 15 and 25 watt versions
★ Power tappings, via integral transformer
★ Ratcheted swivel bracket
★ Stainless steel sinter
★ Stainless steel mounting bracket
★ Tapered flamepath

*Depends on version

8W (Short Flare)

Architects and Engineers Specifications

Speakers for hazardous locations and harsh environments shall be UL and cUL listed for Class I, Division 2, Groups A,B,C&D, and
Class I, Zones 1, AExd IIC T4 applications. They shall be constructed of lightweight, UV stable glass reinforced polyester, shall be
corrosion resistant, and shall meet NEMA 4x, NEMA 6, IP 66 & IP 67 environmental requirements over a temperature range of

-67°F to +158°F (-55°C to +70°C).

The speakers shall be rated for 70 vrms input with power taps for 1,2,4,6,12.5 or 25 watt operation. Rated sound output shall be up
to 109 dBA at 10 feet and rated frequency response shall be 400Hz to 8kHz. The speakers shall include a stainless steel mounting
bracket with ratchet facility to direct sound output.

Note: Due to continuous development of our products, specifications and offerings are subject to change without notice in accordance
with Cooper Wheelock standard terms and conditions.

ATEX

Polar plot (1W/1m) for 25 watt version.

Specification

Rated Power: 8, 15 or 25 watts RMS continuous (at 77°F).

Certification: UL listed for USA and Canada:

– Class I, Div 2, Groups A-D – Class I, Zones 1, AExd IIC T4.
– Class II, Div 2, Groups F & G
ATEX approved: EN50014, 18, 19.

Cert. No. BAS00ATEX2098X. EExd 11C T41/T5
Zones 1 not for use in atmospheres containing carbon disulphide
Material: Body & horn in anti-static, UV stable, glass reinforced polyester.
Swivel bracket in stainless steel.
Captive cover screws in stainless steel.

Finish: Body and horn, natural black or epoxy paint coated to client’s color require-

Output:
109 dBA at 25 Watts at 10 feet
Measured in accordance with IEC 268.

Weight: 11lb./5.0kg approx.

Certified Temperature:

Ingress Protection: NEMA 4x & 6, IP66 & IP67.

Frequency Range: 400Hz to 8kHz.
Voice Coil Impedence: 8 ohms.
Transformer:

Transformer Power
Tappings 25W 15W 8W

1:2 25.0* 15.0* 8.0*
2:3 12.5* 7.5* 4.0*
3:4 6.0 5.0 2.0
1:3 4.0 4.0 1.5
2:4 2.0* 2.0* 0.7*

Transformer Tappings

1:4 1.0 0.8 0.4
Transformer Options:

i) Standard Tapping: (4 x 2) terminal tap change (8 terminals).
ii) Optional Tapping: 4 terminal tap change with 2 terminals (5 & 6), directly connected

Other tappings & driver impedances available on request.

Terminals: 8 x 14AWG

Mounting: Bracket with ratchet facility.

Labels: Duty and tag labels optional.

Cable Entries: 2 x 1/2" NPT.

No. BAS00ATEX2097X. EExd 11C T41/T5

ments.
97 dBA at 1 Watt at 10 feet

–67°F to +158°F (55°C to +70°C)

Used to vary the rated power by selecting different tappings (see table below).

to driver (8 ohms).

*Include blocking capacitor for DC supervision of field wiring

Polar plot and frequency response curves for other speakers are available upon request.

Configuration Options:

Max. Rated Power Certification Transformer Labels Entries Color

DB4

Power Code

8 watt 8
15 watt 15
25 watt 25

Type Code
UL listed UL

Standard Models

Series Model Number Order Code Decription

DB4 DB425ULXN2CR 109208-001 Speaker, 25 Watt, Transformer, Red Finish

DB4 DB415ULXN2CR 109208-002 Speaker, 15 Watt, Transformer, Red Finish

UL

Transformer Code
Yes X*

None N
*Std 100V

Other values available,
specify voltage.

Label Code
Duty D*

Tag T*
None N

*Please specify wording

Color Code
Natural Black N

Red R
Special S*

*Please specify

Entries Code
1 x ½" NPT 1C

2 x ½" NPT 2C

To specify certified plug, suffix ap­propriate code with 'P'. e.g. 2CP is 2
x 1/2" NPT entries with one certified
plug

273 Branchport Avenue
Long Branch, NJ 07740
Phone: [phone]
Fax: [phone]
www.cooperwheelock.com

WE ENCOURAGE AND SUPPORT NICET CERTIFICATION

3 YEAR WARRANTY

Made in USA

DB4 04/07