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Loudspeaker – DB4B UL
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6.0 Certification/approvals
UL listed for use in USA (USL) and Canada (CNL)
Please refer to the marking on the unit for specific
approval details
(USL)
Class I, Zone 1 AEx db IIC T*
Zone 21 AEx tb IIIC
(CNL)
Class I, Zone 1 Ex db IIC Gb T*
Class II, Zone 21 Ex tb IIIC Db
Also suitable for:
Class I, Div. 2 Groups A, B, C, D
Class II, Div. 2, Groups F & G
Class III, Div. 1
Appliccable Standards:
(USL)
UL 60079-0, Edition 7
UL 60079-1, Edition 7
ANSI/ISA 60079-31, Edition 2
UL- 1480
(CNL)
CSA C22.2 No. 60079-0:11
CSA C22.2 No. 60079-1:11
CSA C22.2 No. 60079-31, Edition 2
CSA C22.2 No. 205-12
T-Ratings
Max. power rating
T
amb.
-67°F to +185°F (-55°C to +85°C)
8W
-67°F to +131° F (-55°C to +55°C)
-67°F to +104°F (-55°C to +40°C)
-67°F to +185°F (-55°C to +85°C)
15W
-67°F to +158°F (-55°C to +70°C)
-67°F to +104°F (-55°C to +40°C)
-67°F to +158°F (-55°C to +70°C)
25W
-67°F to +104°F (-55°C to +40°C)
7.0 Special conditions for safe use
1. For replacement purposes the cover fixing screws
shall be of stainless steel grade A2-70 or stronger.
2. Painting and surface finishes, other than those applied
by the manufacturer, are not permitted.
3. When the unit is used in dust atmospheres the
cable entries used shall be sealed to maintain
4
Loudspeaker – dB4B uL TM262 April 2020 www.eaton.com
All manuals and user guides at all-guides.com
4. Warning – Do not open when an explosive
5. For supply connections, use minimum 105°C
6. Warning – to avoid electrostatic charge build up, clean
7 . Warning – to reduce the risk of ignition of hazardous
8. Warning - This product is not nonincendive. It is
8.0 Functional safety
Introduction
The DB4B Loudspeaker has been designed for use in
potentially explosive atmospheres and harsh environmental
conditions. The glass reinforced polyester enclosures are
suitable for use offshore or onshore, where light weight
combined with corrosion resistance is required.
The safety function of the Speaker is to provide an audible
T-ratings (T*)
warning when required.
T4/T135°C
T5/T100°C
Under No fault (Normal) Operating conditions the
DB4B Speaker will provide an audible warning sound
T6/T85°C
when required by the system.
T3/T200°C
T4/T135°C
Under fault conditions the failure mode of the Speaker
is a failure to provide an audible warning sound. For the
T5/T100°C
failure rate associated with this failure mode please refer
T4/T135°C
to the table below.
T5/T100°C
Assessment of functional safety
This Loudspeaker is intended for use in a safety system
conforming to the requirements of IEC61508.
UL has conducted a Failure Modes Effect and Diagnostic
Analysis (FMEDA) of the DB4B Loudspeaker against the
requirements of IEC 61508-2 using a Proof Test Interval
of 8760hrs.
The results are shown right and are based on Route 1
The Speaker is classed as a Type A device.
the IP6X rating, in accordance with the applicable
installation codes.
atmosphere is present.
rated wire.
enclosure with a damp cloth.
atmospheres, conduit openings must have a sealing
fitting connected within 50mm of the enclosure.
a Zone 1 Ex d product. When used in a Division
2 application by equivalence, it must be installed
as a Zone 1 Ex d product to maintain the type of
protection.
.
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