These Units Also Have The Following Approvals; Special Conditions For Safe Use; Functional Safety; Introduction - Eaton DB3B Mode D'emploi

Sounder - DB3B
English

These units also have the following approvals:

Ingress protection: Ex d & Ex e terminal chambers – IP66
& IP67 to IEC60529
EN54-3 Fire Alarm Device - Sounder (11-57.6V
DC Absolute)
Environment Type B Outdoor applications
Ambient Temperature -25°C to +70°C
IP code IP33C to BS EN 60529:1992
This signifies unit compliance to the relevant European
regulations, in this case 305/2011, along with the name
and number of the notified body issuing the certificate of
conformity.

7.0 Special conditions for safe use

a) Type DB3B Ex d:
IECEx BAS 13.0112X, IECEx BAS 13.0113X,
Baseefa13ATEX0229X & Baseefa13ATEX0231X
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 (GD
units only) the cable entries used shall be sealed
to maintain the IP6X rating, in accordance with the
applicable installation codes.
4. This apparatus is suitable for use only in ambient
temperatures as follows:
Max. Power rating T
amb.
-55°C to +85°C
15W -55°C to +55°C
-55°C to +40°C
b) Type DB3B Ex de:
IECEx BAS 13.0114X, IECEx BAS 13.0115X,
Baseefa13ATEX0232X & Baseefa13ATEX0233X
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. Not more than one single or multiple strand wiring
lead shall be connected into either side of any terminal,
unless multiple conductors have been joined in a
suitable manner, e.g. two conductors into a single
insulated boot lace ferrule.
4. Leads connected to the terminals shall be insulated
for at least 275V and this insulation shall extend to
within 1mm of the metal of the terminal throat.
5. Minimum creepage and clearance distances between
10
Sounder - dB3B
T T
G d
T4 T135°C
T5 T100°C
T6 T85°C
TM264 July 2020 www.eaton.com
the terminals and adjacent conductive parts (including
cable entry devices) must be at least 6mm.
6. All terminal screws, used and unused, shall be
tightened down.
7 . When the unit is used in dust atmospheres (GD
units only) the cable entries used shall be sealed
to maintain the IP6X rating, in accordance with the
applicable installation codes.
8. If used, internal optional earthing material shall be
anti-corrosive.
9. This apparatus is suitable for use only in ambient
temperatures as follows:
Max. Power rating T
amb.
-50°C to +85°C
15W -50°C to +55°C
-50°C to +40°C

8.0 Functional safety

Introduction

The DB3B Sounder has been designed for use in
potentially explosive atmospheres and harsh envi-
ronmental 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 Sounder is to provide a pre-
determined audible warning sound when required if the
correct voltage is applied to the unit. The DC version of
the Sounder is designed to operate on a supply voltage
between 12-48v dc.
Under No fault (Normal) Operating conditions the DB3B
Sounder will provide an audible warning sound when
required by the system.Under fault conditions the failure
mode of the Sounder is a failure to provide an audible
warning sound. For the failure rate associated with this
failure mode please refer to the table below.

Assessment of functional safety

This Sounder 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 DB3B Sounder against the
requirements of IEC 61508-2 using a Proof Test Interval
of 8760hrs.
The results are shown below and are based on Route 1
The Sounder is classed as a Type B device.
T T
G d
T4 T135°C
T5 T100°C
T6 T85°C
.
H