Eaton DB3P User manual

Sounder - DB3B
Technical manual

ii SOUNDER - DB3B TM264 July 2020 www.eaton.com
DISCLAIMER OF WARRANTIES AND LIMITATION OF LIABILITY
DISCLAIMER OF WARRANTIES AND LIMITATION OF LIABILITY
The information, recommendations, descriptions and safety notations in this document are based on Eaton Corporation’s
(“Eaton”) experience and judgment and may not cover all contingencies. If further information is required, an Eaton sales
office should be consulted. Sale of the product shown in this literature is subject to the terms and conditions outlined in
appropriate Eaton selling policies or other contractual agreement between Eaton and the purchaser.
THERE ARE NO UNDERSTANDINGS, AGREEMENTS, WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING
WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY, OTHER THAN THOSE
SPECIFICALLY SET OUT IN ANY EXISTING CONTRACT BETWEEN THE PARTIES. ANY SUCH CONTRACT STATES THE
ENTIRE OBLIGATION OF EATON. THE CONTENTS OF THIS DOCUMENT SHALL NOT BECOME PART OF OR MODIFY
ANY CONTRACT BETWEEN THE PARTIES.
In no event will Eaton be responsible to the purchaser or user in contract, in tort (including negligence), strict liability or
other-wise for any special, indirect, incidental or consequential damage or loss whatsoever, including but not limited to
damage or loss of use of equipment, plant or power system, cost of capital, loss of power, additional expenses in the
use of existing power facilities, or claims against the purchaser or user by its customers resulting from the use of the
information, recommendations and descriptions contained herein. The information contained in this manual is subject to
change without notice.

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Sounder - DB3B
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SOUNDER - DB3B TM264 July 2020 www.eaton.com
Contents
1.0 INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
2.0 GENERAL SAFETY MESSAGES AND WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
3.0 INSTALLATION.......................................................................1
Access to terminals.......................................................................... 1
Wiring details. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Ex d – AC input wiring details (Types 1 & 2) ....................................................... 2
Ex de – AC input wiring details (Types 3 & 4) ...................................................... 2
Ex d & Ex de – DC input, 3 stage without monitoring wiring details (Types 5 & 6) ......................... 3
Ex d & Ex de – DC input, dual stage common +ve with monitoring (standard configuration) wiring details
(Types 7 & 8).............................................................................. 4
Ex d & Ex de – DC input, up to 3 stage with or without monitoring (alternative configuration) wiring details
(Types 9 & 10) ............................................................................. 4
Ex d – DC input with voltage free stage activation wiring details (Type 11) ............................... 5
Ex de – DC input with voltage free stage activation wiring details (Type 12) .............................. 5
4.0 OPERATION .........................................................................5
5.0 MAINTENANCE ......................................................................8
6.0 CERTIFICATION/APPROVALS ...........................................................9
lECEx units ................................................................................ 9
Gas (G) certified units ........................................................................ 9
Gas & Dust (GD) certified units................................................................. 9
ATEX units ................................................................................. 9
Gas (G) certified units ........................................................................ 9
Gas & dust (GD) certified units ................................................................. 9
These units also have the following approvals .................................................... 10
7.0 SPECIAL CONDITIONS FOR SAFE USE ..................................................10
8.0 FUNCTIONAL SAFETY ...............................................................10
Introduction ............................................................................... 10
Assessment of functional safety............................................................... 10
Conditions of safe use....................................................................... 12
9.0 EN54-3 ............................................................................12

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Sounder - DB3B
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SOUNDER - DB3B TM264 July 2020 www.eaton.com

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English
1.0 Introduction
This range of sounders, intended for use in potentially
explosive gas and dust atmospheres, is available in
versions suitable for use in the following gas/dust groups:
The range is available in versions suitable for use in either
gas (G) or gas and dust (GD) groups.
ote:N (G) unit has nominally 6dB higher output than
(GD) unit.
The Ex enclosure is manufactured from a UV stable
glass reinforced polyester with a rugged thermoplastic
flare. Stainless steel mounting bracket, cover screws and
fixings are incorporated throughout thus ensuring a corro-
sion free product.
An optional Ex e terminal chamber is available (see certifi-
cation section for further details).
An uncertified version is available for use in
non-explosive atmospheres.
2.0 General safety messages and
warnings
All instructions and safety messages in this manual must
be followed to allow safe installation of the device. The
device must only be installed and maintained by correctly
trained site personnel/installers.
I. To reduce the risk of ignition of hazardous
atmospheres and shock, do not apply power to
the device until installation has been completed
and the device is fully sealed and secured.
II. To reduce the risk of ignition of hazardous
atmospheres and shock, keep device tightly
closed when the circuit is energised.
III. Before removing the cover for installation or
maintenance, ensure that the power to the device
is isolated.
IV. Following installation, test the device to ensure
correct operation.
V. Following installation ensure a copy
of this manual is made available to all
operating personnel.
VI. When installing the device, requirements for
selection, installation and operation should be
referred to e.g. IEE Wiring Regulations and the
‘National Electrical Code’ in North America.
Additional national and/or local requirements
may also apply.
VII. Cable termination should be in accordance with
the specification applying to the required appli-
cation. MEDC recommends that all cables and
cores should be correctly identified. Please refer
to the wiring diagram in this manual (or separate
diagram provided with the unit).
VIII. Ensure that only the correct listed or certified
cable glands are used and that the assembly is
shrouded and correctly earthed.
IX. Ensure that only the correct listed or certified
stopping plugs are used to blank off unused
gland entry points and that the NEMA/IP rating of
the unit is maintained.
X. MEDC recommend the use of a sealing
compound such as HYLOMAR PL32 on the
threads of all glands and stopping plugs and/or a
suitable sealing washer in order to maintain the
IP rating of the unit.
XI. On Exde units, a suitable sealing washer must be
fitted to all glands and stopping plugs fitted into
the Exe enclosure.
XII. The end user or installer shall ensure that this
equipment is protected against external influ-
ences which could adversely affect the explosion
protection, or contact the manufacturer if in doubt
of the suitability of this equipment in the environ-
ment in which it is to be installed.
XIII. Ex d Units
The internal earth terminal must be used for
protective earthing when required. Do not remove
the internal ground strap from the earth terminal
where fitted.
For units with metric entries; gland continuity
and earthing may be achieved with an optional
external earth plate. If the external plate is fitted,
a thread sealing compound such as HYLOMAR
PL32 must beemployed to maintain the IP rating
of the unit.
Ex de Units
The internal/external earth stud must be used
for equipment grounding when required. Gland
continuity is achieved if the optional internal earth
plate is fitted.
XIV. When installing the device, MEDC recommends
the use of stainless steel fasteners. Ensure that all
nuts, bolts and fixings are secure.
XV. The unit should be positioned such that debris,
dust or water cannot settle in the re-entrant horn.
XVI. The unit should be positioned such that any solid
object, not part of the equipment, is a minimum
of 40mm from the Ex d flamepath joint.
XVII. The purchaser should make the
manufacturer aware of any external effects or
aggressive substances that the equipment may
be exposed to.
3.0 Installation
The unit is mounted via 2 off Ø9mm fixing holes in the
U-shaped stirrup/mounting bracket. If required, the unit
can be initially placed via the Ø13mm central hole in the
stirrup. The unit can then be rotated to the required posi-
tion and fixed via the other holes.
If ordered with the unit, a swivel mounting bracket option
is available to allow further rotational adjustment to
the unit.
The fixing holes have been designed to accept an M8
screw or bolt.
Access to terminals
On Ex d versions, the cover is secured with 6 off M5
cover screws (4.0mm A/F hexagon key). Once the cover
fixings are unscrewed, the cover can be lifted away from
the enclosure to gain access to the interior. The cover
fixings are captive and will remain in the cover.

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On Ex de versions the removable cover is secured using
3 off M5 cover screws (4.0mm A/F hexagon key). Once
the cover fixings are unscrewed, the cover can be lifted
away from the enclosure to gain access to the interior.
The cover fixings are captive and will remain in the cover.
All terminal screws, used and unused, shall be tightened
down. Once termination is complete, carefully replace
the cover assembly back onto the body, avoiding damage
to the mating surfaces. Tighten the cover screws evenly.
On Ex-de certified versions, ensure the maximum torque
value for the cover screws is observed, as marked on
the Ex e cover. Ensure the O-ring is seated correctly on
the cover during re-assembly. On Ex d certified versions,
ensure the required maximum gap of 0.04mm is main-
tained between the cover and the base once assembled.
Wiring details
The unit is available in a number of basic configurations,
below. See section 9 for EN54-3 specific configurations.
1. Ex d - AC input, single stage.
2. Ex d - AC input, dual stage with voltage-free
stage selection.
3. Ex de - AC input, single stage.
4. Ex de - AC input, dual stage with voltage-free
stage selection.
5. Ex d - DC input, up to 3 user selectable stages
without monitoring.
6. Ex de - DC input, up to 3 user selectable stages
without monitoring.
7. Ex d - DC input, up to 2 user selectable stages with
EOL/monitoring (standard configuration).
8. Ex de - DC input, up to 2 user selectable stages with
EOL/monitoring (standard configuration).
9. Ex d - DC input, up to 3 user selectable stages with
optional EOL/monitoring (alternative configuration).
10. Ex de - DC input, up to 3 user selectable stages with
optional EOL/monitoring (alternative configuration).
11. Ex d - DC input, 5 user selectable stages with voltage
free stage selection with or without monitoring.
12. Ex de - DC input, 5 user selectable stages
with voltage free stage selection with or
without monitoring.
Ex d – AC input wiring details (Types 1 & 2)
• Type 1: Connect the live and neutral supply wires to
the terminals as detailed in the wiring diagram. The unit
will be supplied with the link between R1 and R0 fitted
to the terminals. When power is applied to the unit,
the stage 1 tone will be produced as selected on the
5- way DIP switch.
• Type 2: Connect the live and Neutral supply wires to
the terminals as detailed in the wiring diagram. The unit
will be supplied with no link fitted between R1 and R0.
Connect wires and remote switches to terminals R0,
R1 and R2 as shown. When power is initially applied
to the unit, no tone will be produced. When the switch
connected to R1 is closed, the stage 1 tone will be
produced as selected by the 5-way DIP switch on the
electronics assembly. When the switch connected to R2
is closed, the pre-selected tone for stage 2 is produced.
See tone table 2 for details of pre-selected tones.
ote:N Closing both switches will produce no tone.
CUSTOMER
WIRING
DB3B Ex d CHAMBER
R1
R2
R0
N
N
L
L
ELECTRONICS
ASSEMBLY
VOLTAGE-FREE
STAGE
ACTIVATION
TERMINALS
LIVE IN
LIVE OUT
NEUTRAL IN
NEUTRAL OUT
STAGE 1
STAGE 2
COMMON
Ex de – AC input wiring details (Types 3 & 4)
• Type 3: Connect the live and neutral supply wires to
the terminals as detailed in the wiring diagram. When
power is applied to the unit, the stage 1 tone will be
produced as selected on the 5- way DIP switch inside
the Ex d chamber.
• Type 4: Connect the live and Neutral supply wires
to the terminals as detailed in the wiring diagram.
When power is initially applied to the unit, no tone
will be produced. Connect wires and remote switches
to terminals R0, R1 and R2 as shown. When the
switch connected to R1 is closed, the stage 1 tone
will be produced as selected by the 5-way DIP
switch on the electronics assembly. When the switch
connected to R2 is closed, the pre-selected tone for
stage 2 is produced. See tone table 2 for details of
pre-selected tones.
ote:N Closing both switches will produce no tone.
DB3B Ex e CHAMBER
CUSTOMER
WIRING
1
2
3
4
1
2
3
4
LIVE IN
LIVE OUT
NEUTRAL IN
NEUTRAL OUT
STAGE 1 (R1)
STAGE 2 (R2)
COMMON (R0)
Ex de – AC input wiring diagram (Types 3 & 4)
Ex d – AC input wiring diagram (Types 1 & 2)

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Ex d & Ex de – DC input, 3 stage without
monitoring wiring details (Types 5 & 6)
This type can be configured in a number of different ways
depending on requirements. Independent tone selection
for all 3 stages is via the 3 off 5-way DIP switches fitted
to the electronics assembly:
• 2-wire system (Single stage): Connect the positive
and negative supply wires to the terminals as detailed
in the wiring diagram.
• 2-wire system (Dual stage, reverse polarity): Connect
the positive and negative supply wires to the terminals
as detailed in the wiring diagram. The second stage
is produced by reversing the polarity of the supply to
theunit.
• 3-wire system (Dual stage, common +ve): Connect 3
supply wires to the terminals as detailed in the wiring
diagram (1 common +ve wire and 2 -ve wires). Stage 1
is produced when power is applied across the common
+ve and stage 1 -ve terminals. Stage 2 is produced
when power is applied across the common +ve and
stage 2 -ve terminals.
• 3-wire system (Dual stage, common -ve): Connect
3supply wires to the terminals as detailed in the wiring
diagram (2 +ve wires and 1 common -ve wire). Stage
1 is produced when power is applied across the stage
1 +ve and common -ve terminals. Stage 2 is produced
when power is applied across the stage 2 +ve and
stage common -ve terminals.
• 4-wire system (Triple stage, Common -ve): Connect
4 supply wires to the terminals as detailed in the wiring
diagram (3 +ve wires and 1 common -ve wire). Stage
1 is produced when power is applied across the stage
1 +ve and common -ve terminals. Stage 2 is produced
when power is applied across the stage 2 +ve and
common -ve terminals. Stage 3 is produced when
power is applied across the stage 3 +ve and common
-ve terminals.
All versions are supplied with terminals to allow loop-in
loop-out connection of the supply wires.
ote:N If an EOL resistor is specified on a DC unit, it will
be fitted as standard across terminals 5 & 6 in the
Ex d chamber (see below). Re-position EOL as
required for other configurations.
When positioning the EOL, ensure there is a minimum of
14mm free space between the resistor body and terminal
block and ensure the resistor is not in contact with the
PCB or housing.
Ex d & Ex de – DC Input, 3 stage without monitoring wiring details (Types 5 & 6)
R1
R1
R1
R1 R1
DB3B DC DUAL STAGE
REVERSE POLARITY CONFIGURATION
DB3B DC SINGLE STAGE
CONFIGURATION
DB3B DC DUAL STAGE
COMMON POSITIVE
CONFIGURATION
DB3B DC DUAL STAGE
COMMON NEGATIVE
CONFIGURATION
DB3B DC TRIPLE STAGE
COMMON NEGATIVE
CONFIGURATION
Ex d
1
2
3
4
5
6
7
8
Ex de
1
2
3
4
1
2
3
4
Ex d
1
2
3
4
5
6
7
8
Ex de
1
2
3
4
1
2
3
4
Ex d
1
2
3
4
5
6
7
8
Ex de
1
2
3
4
1
2
3
4
Ex d
1
2
3
4
5
6
7
8
Ex de
1
2
3
4
1
2
3
4
Ex d
1
2
3
4
5
6
7
8
Ex de
1
2
3
4
1
2
3
4
STAGE 1 +VE IN
COMMON -VE IN
NOT USED
STAGE 2 +VE IN
STAGE 1+VE OUT
COMMON -VE OUT
NOT USED
STAGE 2 +VE OUT
STAGE 2 +VE IN
STAGE 3 +VE IN
STAGE 1 +VE IN
COMMON -VE IN
STAGE 2 +VE OUT
STAGE 3 +VE OUT
STAGE 1 +VE OUT
COMMON -VE OUT
COMMON +VE IN
STAGE 1 -VE IN
NOT USED
STAGE 2 -VE IN
COMMON +VE OUT
STAGE 1 -VE OUT
NOT USED
STAGE 2 -VE OUT
STAGE 1 +VE IN/STAGE 2 -VE IN
STAGE 1 -VE IN/STAGE 2 +VE IN
NOT USED
NOT USED
STAGE 1 +VE OUT/STAGE 2 -VE OUT
STAGE 1 -VE OUT/STAGE 2 +VE OUT
NOT USED
NOT USED
STAGE 1 +VE IN
STAGE 1 -VE IN
NOT USED
NOT USED
STAGE 1 +VE OUT
STAGE 1 -VE OUT
NOT USED
NOT USED

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Ex d & Ex de – DC input, dual stage common
+ve with monitoring (standard configuration)
wiring details (Types 7 & 8)
Connect up to 4 supply wires to the terminals as detailed
in the wiring diagram. Stage 1 is produced when power is
applied across the common +ve and stage 1-ve terminals.
Stage 2 is produced when power is applied across the
common +ve and stage 2-ve terminals.
Monitoring functionality is obtained when the supply is
connected across M1 & M2 terminals.
ote:N monitored terminals are not polarity dependent.
DB3B DC DUAL STAGE
COMMON POSITIVE CONFIGURATION
WITH MONITORING
MONITORING FUNCTIONALITY ONLY
AVAILABLE WHEN RESISTOR IS FITTED
Ex de
1
2
3
4
1
2
3
4
Ex d
1
2
3
4
5
6
7
8
COMMON +VE / M1 IN
STAGE 1 -VE IN
M2 IN
STAGE 2 -VE IN
COMMON +VE / M1 OUT
STAGE 1 -VE OUT
M2 OUT
STAGE 2 -VE OUT
R1
Ex d & Ex de – DC input, up to 3 stage with or
without monitoring (alternative configuration)
wiring details (Types 9 & 10 )
ote:N This alternative configuration must be specified
when ordering the unit.
This type can be connected either as a three stage
common –ve configuration, or if an optional EOL is specified
if can be configured as a dual stage common –ve system
with monitoring.
•
4-wire system (Triple stage, Common +ve): Connect
4 supply wires to the terminals as detailed in the wiring
diagram (1 common +ve wire and 3 -ve wires). Stage 1
is produced when power is applied across the common
+ve and stage 1 -ve terminals. Stage 2 is produced
when power is applied across the common +ve and
stage 2 -ve terminals. Stage 3 is produced when
power is applied across the common +ve and stage
3 -ve terminals.
•
4-wire system (Dual stage, common –ve with
monitoring): Connect up to 4 supply wires to the
terminals as detailed in the wiring diagram. Stage 1 is
produced when power is applied across the common
-ve and stage 1 +ve terminals. Stage 2 is produced
when power is applied across the common -ve and
stage 2 +ve terminals.
Monitoring functionality is obtained when the supply is
connected across M1 & M2 terminals.
Note: monitored terminals are not polarity dependent.
R1
DB3B DC TRIPLE STAGE
COMMON POSITIVE
CONFIGURATION
DB3B DC DUAL STAGE
COMMON NEGATIVE CONFIGURATION
WITH MONITORING
MONITORING FUNCTIONALITY ONLY
AVAILABLE WHEN RESISTOR IS FITTED
R1
COMMON +VE IN
STAGE 1 -VE IN
STAGE 3 -VE IN
STAGE 2 -VE IN
COMMON +VE OUT
STAGE 1 -VE OUT
STAGE 3 -VE OUT
STAGE 2 -VE OUT
STAGE 2 +VE IN
M1 IN
STAGE 1 +VE IN
COMMON -VE / M2 IN
STAGE 2 +VE OUT
M1 OUT
STAGE 1 +VE OUT
COMMON -VE / M2 OUT
Ex d
1
2
3
4
5
6
7
8
Ex de
1
2
3
4
1
2
3
4
Ex d
1
2
3
4
5
6
7
8
Ex de
1
2
3
4
1
2
3
4
Ex d & Ex de – DC input, dual stage common +ve
diagram (Types 7 & 8)
Ex d & Ex de – DC input, up to 3 stage diagrams
(Types 9 & 10)

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Ex d – DC input with voltage free stage
activation wiring details (Type 11)
Connect the positive (+ve) and negative (-ve) supply
wires to the terminals as detailed in the wiring diagram.
When power is applied to the unit, no tone will be
produced initially. Connect wires and remote switches to
terminals R0 to R5 as shown. When the switch connected
to R1 is closed, the stage 1 tone will be produced as
selected by the 5-way DIP switch on the electronics
assembly. When any of the other switches connected
to R2 to R5 is closed, the preselected tone for stages
2 to 5 are produced. See tone table 2 for details of
pre-selected tones.
ote:N Closing more than one switch at a time will result
in no tone being produced.
If a resistor (R1) is fitted, monitoring functionality is
obtained when the supply polarity is reversed.
R1 - OPTIONAL EOL RESISTOR
R1
+VE IN
+VE OUT
-VE IN
-VE OUT
STAGE 1
STAGE 2
STAGE 3
STAGE 4
STAGE 5
COMMON
T1
T2
T3
T4
R1
R2
R3
R4
R5
R0
CUSTOMER
WIRING
DB3B Ex d CHAMBER
Ex de – DC input with voltage free stage
activation wiring details (Type 12)
Connect the positive (+ve) and negative (-ve) supply
wires to the terminals as detailed in the wiring diagram.
When power is applied to the unit, no tone will be
produced initially. Connect wires and remote switches to
terminals R0 to R5 as shown. When the switch connected
to R1 is closed, the stage 1 tone will be produced as
selected by the 5-way DIP switch on the electronics
assembly. When any of the other switches connected
to R2 to R5 is closed, the pre-selected tone for stages
2 to 5 are produced. See tone table 2 for details of
pre-selected tones.
ote:N Closing more than one switch at a time will result
in no tone being produced.
If a resistor (R1) is fitted, monitoring functionality is
obtained when the supply polarity is reversed.
R1 - OPTIONAL EOL RESISTOR
LOCATED IN Ex d CHAMBER
R1
DB3B Ex e CHAMBER
CUSTOMER
WIRING
1
2
3
4
1
2
3
4
+VE IN/OUT
-VE IN/OUT
STAGE 1 (R1)
STAGE 2 (R2)
STAGE 3 (R3)
STAGE 4 (R4)
STAGE 5 (R5)
COMMON (R0)
4.0 Operation
The sounder is available in various AC input voltage
versions and a single DC input voltage version.
For AC versions, the nominal operating voltage is stated
on the unit label and the supply voltage tolerance is ±10%.
For DC versions, the absolute input voltage range is
11.0Vdc to 57.6Vdc.
If using an EOL resistor with a value between 700Ω and
2KΩ the maximum voltage should be limited to 28.8Vdc,
if using an EOL resistor with a value between 470Ω and
700Ω the maximum voltage should be limited to 26Vdc.
The unit is fitted with a volume control which is positioned
on the top face of the electronics assembly PCB.
Maximum volume is obtained when this control is turned
fully clockwise. When turned fully anti-clockwise the unit
will emit no sound.
Warning: Do not attempt to turn the volume control past its
limits of movement as this may cause damage to the unit.
Stages
For all versions, a 5-way DIP switch selects the stage
required for each stage. The settings for the standard
stages are shown in the table below:

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Tone table 1:
Tone no. Tone freq/description Switch setting 12345 Tone description Nominal SPL (dB(A)
@1M)
1Alt Stages 800/970 Hz at 1/4 sec 11111 112
2Sweeping 800/970 Hz at 7 Hz 11110 Fast Sweep (LF) 111
3* Sweeping 800/1000 Hz at 1 Hz 11101 Medium Sweep (LF) 113
4Continuous at 2850 Hz 11100 111
5Sweeping 2400-2850 Hz at 7 Hz 11011 Fast Sweep 112
6Sweeping 2400-2850 Hz at 1 Hz 11010 113
7* Slow Whoop 11001 Slow Whoop 113
8* Sweep 1 200-500 Hz at 1 Hz 11000 Din Stage 117
9Alt Stages 2400/2850 Hz at 2 Hz 10111 111
10 Int Stage of 970 Hz at 1 Hz 10110 Back-up Alarm (LF) 112
11 Alt Stages 800/970 Hz at 7/8 Hz 10101 112
12 Int Stage at 2850 Hz at 1 Hz 10100 Back-up Alarm (HF) 112
13 970 Hz at 1/4 sec on 1 sec off 10011 112
14 Continuous at 970 Hz 10010 112
15* 554 Hz for 0.1S/440 Hz for 0.4S 10001 French Fire Sound 113
16 Int 660 Hz 150 mS on 150 mS off 10000 Swedish Fire Alarm 108
17 Int 660 Hz 1.8 sec on 1.8 sec off 01111 Swedish Fire Alarm 108
18 Int 660 Hz 6.5 sec on 13 sec off 01110 Swedish Fire Alarm 109
19* Continuous 660 Hz 01101 Swedish Fire Alarm 108
20* Alt 554/440 Hz at 1 Hz 01100 Swedish Fire Alarm 113
21 Int 660 Hz at 7/8 Hz 01011 Swedish Fire Alarm 108
22 Int 2850 Hz 150 mS on 100 mS off 01010 Pelican Crossing 111
23 Sweep 800-970 Hz at 50 Hz 01001 Low Freq. Buzz 109
24 Sweep 2400 -2850 Hz at 50 Hz 01000 High Freq. Buzz 111
25 3x970 Hz pulses 0.5 off, 1.5 off 00111 112
26 3x2850 Hz pulses 0.5on/0.5off, 1.5 off 00110 112
27 Int 3100 Hz 0.32s on/0.68s off 00101 105
28 Continuous 1400 Hz 00100 125
29 Spare / Custom tone 00011
30 Spare / Custom tone 00010
31 Spare / Custom tone 00001
32 Spare / Custom tone 00000
ote:N If special tones were requested at the time of ordering, please see the separate tones list supplied with the unit
for details of these special tones and their respective switch settings.
* = EN54-3 compliant tones. See section 9 for EN54-3 specific tones data.

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ote:N
Tone table 2: Pre-selected tone details for voltage-free activation stages:
Stage 1 Stage 2 Stage 3 Stage 4 Stage 5 Stage 2
1Alt Tones 800/970Hz at 1/4 sec 11111 T14 T10 T11 T8 T14
2Sweeping 800/970Hz at 7 Hz 11110 T14 T10 T1 T8 T14
3Sweeping 800/970Hz at 1 Hz 11101 T14 T10 T1 T8 T14
4Continuous at 2850Hz 11100 T14 T10 T1 T8 T14
5Sweeping 2400-2850Hz at 7Hz 11011 T14 T10 T1 T8 T14
6Sweeping 2400-2850Hz at 1 Hz 11010 T14 T10 T1 T8 T14
7Slow Whoop 11001 T14 T10 T1 T8 T14
8Sweep 1 200-500Hz at 1 Hz 11000 T14 T10 T1 T6 T14
9Alt Tones 2400/2850Hz at 2Hz 10111 T14 T10 T1 T8 T14
10 Int Tone of 970Hz at 1 Hz 10110 T14 T12 T1 T8 T14
11 Alt Tones 800/970Hz at 7/8Hz 10101 T14 T10 T1 T8 T14
12 Int Tone at 2850Hz at 1 Hz 10100 T14 T10 T1 T8 T14
13 970Hz at 1/4 sec on 1 sec off 10011 T14 T10 T1 T8 T14
14 Continuous at 970Hz 10010 T28 T10 T1 T8 T28
15 554Hz for 0.1 S/440Hz for 0.4S 10001 T14 T10 T1 T8 T14
16 Int 660Hz 150 mS on 150 mS off 10000 T14 T10 T1 T8 T14
17 Int 660Hz 1.8 sec on 1.8 sec off 01111 T14 T10 T1 T8 T14
18 Int 660Hz 6.5 sec on 13 sec off 01110 T14 T10 T1 T8 T14
19 Continuous 660Hz 01101 T14 T10 T1 T8 T14
20 Alt 554/440Hz at 1 Hz 01100 T14 T10 T1 T8 T14
21 Int 660Hz at 7/8Hz 01011 T14 T10 T1 T8 T14
22 Int 2850Hz 150 mS on 100 mS off 01010 T14 T10 T1 T8 T14
23 Sweep 800-970Hz at 50Hz 01001 T14 T10 T1 T8 T14
24 Sweep 2400-2850Hz at 50Hz 01000 T14 T10 T1 T8 T14
25 3x970Hz pulses 0.5 off, 1.5 off 00111 T14 T10 T1 T8 T14
26 3x2850Hz pulses 0.5on/0.5off, 1.5 off 00110 T14 T10 T1 T8 T14
27 Int 3100Hz 0.32s on/0.68s off 00101 T14 T10 T1 T8 T14
28 Continuous 1400Hz 00100 T14 T10 T1 T8 T14
29 Spare/Custom tone 00011
30 Spare/Custom tone 00010
31 Spare/Custom tone 00001
32 Spare/Custom tone 00000

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General arrangement
185 ±2
19°
19°
POS. 1
POS. 2
POS. 3
200 ±2
30 ±1
64.5 1 (POS. 1 & 2)
68.0
1 (POS. 3)
280 ±3
208
3 FOR SHORT FLARE VERSION
30 ±1
FIXING HOLES
9 ±1
2 POSITIONS
FIXING HOLE
13 ±1
143 ±2
75.90 ±2
2 ENTRIES MAX.
Ex d LONG FLARE VERSION
WITH STANDARD BRACKET
30°
30°
230 ±2
255.5
3
323.5
3 FOR LONG FLARE VERSION
37 ±1
145.5 ±2
9 ±1 TYP.
25°
25°
147.5
2
2 ENTRIES MAX.
Ex de SHORT FLARE VERSION
WITH OPTIONAL SWIVEL BRACKET
FOR Ex d UNIT, POSITION 3 IS USED IF ONLY
1 x M20 or 1 x 1/2" NPT ENTRY IS REQUIRED
ALL DIMENSIONS ARE COMMON TO ALL UNIT VARIATIONS UNLESS OTHERWISE STATED
ALL DIMENSIONS ARE IN MILLIMETRES
5.0 Maintenance
During the working life of the unit, it should require little or no maintenance. GRP will resist attack by most acids, alkalis
and chemicals and is as resistant to concentrated acids and alkalis as most metal products.
However, if abnormal or unusual environmental conditions occur due to plant damage or accident etc., then visual
inspection is recommended.
See below diagram for details of the flameproof joints found in the unit. WARNING! – The flameproof joints detailed
below are not intended to be repaired.
FLAMEPATH - 9.5 MIN.
INSIDE SCREW HOLES
Ex d COVER/ENCLOSURE
FLAMEPATH
GLAND ENTRY
18 MIN. WALL THICKNESS
UP TO 2 POSITIONS
CABLE ENTRY
DETAIL

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If the unit requires cleaning, then only clean exterior with
a damp cloth to avoid electro-static charge build up.
If a unit fault should occur, then the unit can be repaired
by MEDC.
If you acquired a significant quantity of units, then it
is recommended that spares are also made available.
Please discuss your requirements with the Technical Sales
Engineers at MEDC.
6.0 Certification/approvals
lECEx units
Gas (G) certified units
Certified to IEC60079-0, IEC60079-1 and IEC60079-7
Ex d IIC unit (IEC certification No. lECEx BAS 13.0112X)
Ex db IIC TG(Tamb.) Gb
Ex de IIC unit (IEC certification No. IECEx BAS 13.0114X)
Ex db eb IIC TG(Tamb.) Gb
See special conditions for safe use for ambient temperature
ranges and T-ratings.
The IECEx certificate and product label carry the IECEx
equipment protection level marking:
Gb
Where Gb signifies suitability for use in a Zone 1 surface
industries area in the presence of gas.
Gas & Dust (GD) certified units
Certified to IEC60079-0, IEC60079-1, IEC60079-7 and
IEC60079-31
Ex d IIIC unit (IEC certification No. IECEx BAS 13.0113X)
Ex db IIC TG(Tamb.) Gb
Ex tb IIIC TD(Tamb.) Db IP6X
Ex de IIIC unit (IEC certification No. IECEx BAS 13.0115X
Ex db eb IIC TG(Tamb.) Gb
Ex tb IIIC TD(Tamb.) Db IP65/66*
*depending on outer flare type (Short flare – IP65, Long
flare – IP66)
See special conditions for safe use for ambient tempera-
ture ranges and T-ratings.
The IECEx certificate and product label carry the IECEx
equipment protection level markings:
Gb and Db
Where Gb signifies suitability for use in a Zone 1 surface
industries area in the presence of gas.
Db signifies suitability for use in a Zone 21 surface
industries area in the presence of dust.
ATEX units
Gas (G) certified units
Certified to EN60079-0, EN60079-1 and EN60079-7
Ex d IIC unit (ATEX certification No. Baseefa
13ATEX0229X)
Ex db IIC TG(Tamb.) Gb
Ex de IIC unit (ATEX certification No. Baseefa 13ATEX0232X)
Ex db eb IIC TG(Tamb.) Gb
See special conditions for safe use for ambient temperature
ranges and T-ratings.
The ATEX certificate and product label carry the ATEX group
and category marking:
II 2 G
Where:
Signifies compliance with ATEX
II Signifies suitability for use in surface industries
2 Signifies suitability for use in a zone 1 area
G Signifies suitability for use in the presence of gases
Gas & dust (GD) certified units
Certified to EN60079-0, EN60079-1, EN60079-7 and
EN60079-31
Ex d IIIC unit (ATEX certification No. Baseefa13ATEX0231X)
Ex db IIC TG(Tamb.) Gb
Ex tb IIIC TD(Tamb.) Db IP6X
Ex de IIIC unit (ATEX certification No. Baseefa13ATEX0233X)
Ex db eb IIC TG(Tamb.) Gb
Ex tb IIIC TD(Tamb.) Db IP65/66*
*depending on outer flare type (Short flare – IP65, Long
flare – IP66).
See special conditions for safe use for ambient temperature
ranges and T-ratings.
The ATEX certificate and product label carry the ATEX
group and category marking:
II 2 GD
Where:
Signifies compliance with ATEX
II Signifies suitability for use in surface industries
2 Signifies suitability for use in a zone 1 area
G Signifies suitability for use in the presence of gases
D Signifies suitability for use in the presence of dust

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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 Tamb. TGTD
-55°C to +85°C T4 T135°C
15W -55°C to +55°C T5 T100°C
-55°C to +40°C T6 T85°C
b) Type DB3B Ex de:
IECEx BAS 13.0114X, IECEx BAS 13.0115X,
Baseefa13ATEX0232X & Baseefa13ATEX0233X
1. For replacement purposes the cover xing screws
shall be of stainless steel grade A2-70 or stronger.
2. Painting and surface nishes, 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
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 Tamb. TGTD
-50°C to +85°C T4 T135°C
15W -50°C to +55°C T5 T100°C
-50°C to +40°C T6 T85°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 1H.
The Sounder is classed as a Type B device.

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DB3B Sounder
Safety Function of DB3B Sounder:
To provide a pre-described audible warning sound when required
Summary of Clauses
2/7.4.2 and 2/7.4.4 DB3B Sounder Single Mode (1oo1)
DB3B Sounder
Redundant Mode (1oo2)
Verdict
Architectural constraints
Safe Failure Fraction (SFF)
HFT=0 HFT=1 Type B
65.9% 65.9% SIL 1(1oo1)
SIL 2 (1oo2)
Random hardware
failures: [h-1]
λDD
λDU
6.5E+09
1.16E-07
6.5E+10
1.16E-08
Random hardware
failures: [h-1]
λSD
λSU
0.00E+00
2.18E-07
0.00E+00
2.18E-08
PFD @ PTI = 8760Hrs MTTR = 8 Hrs 5.09E-04 5.09E-05 SIL 3(1oo1)
Average freq. of dangerous failure (high
demand-PFH)[h-1]
1.16E-07 1.16E- 08 SIL 2(1 oo1)
Hardware safety integrity compliance Route 1 H
Systematic safety integrity compliance Route 1 S
Systematic Capability
(SC1, SC2, SC3, SC4)
SC2
Hardware safety integrity achieved Limited to: SIL 1 (1oo1) & SIL 2 (1oo2) due to SFF value.

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Conditions of safe use
The following conditions apply to the installation,
operation and maintenance of the assessed equipment.
Failure to observe these may compromise the safety
integrity of the assessed equipment:
1. The user shall comply with the requirements given in
the manufacturer’s user documentation (This Safety
Manual and Technical manual) in regard to all relevant
functional safety aspects such as application of use,
installation, operation, maintenance, proof tests,
maximum ratings, environmental conditions, repair, etc.
2. Selection of this equipment for use in safety
functions and the installation, configuration, overall
validation, maintenance and repair shall only be
carried out by competent personnel, observing all the
manufacturer’s conditions and recommendations in
the user documentation.
3. All information associated with any field failures
of this product should be collected under a
dependability management process (e.g., IEC
60300-3-2) and reported to the manufacturer.
4. The unit should be tested at regular intervals to
identify any malfunctions; in accordance with this
safety manual.
5. If the product is used in a redundant installation,
both hardware safety integrity and systematic safety
integrity for SIL 2 can be achieved. The installation
must be such as to ensure sufficient protection
against common cause failures and independence
from cascading failures.
9.0 EN54-3 certified product
Wiring Configuration
The EN54-3 certified version may be connected for single
stage only (2 wires) dual stage common negative only (3
wires) or triple stage common negative (4 wires) in the
configurations shown below.

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EN54-3 Compliant Tones Data
Angle
Minimum Volume dB(A)
Horizontal Plane Vertical Plane
Max 58V Min 11V Max 58V Min 11V
TONE 3
15° 97.9 96.7 97.9 98.5
45° 102.2 100.7 101.2 99.6
75° 110.2 109.2 110.0 108.9
105° 110.2 109.3 110.6 109.5
135° 103.4 102.0 104.8 103.3
165° 98.4 97.4 99.6 98.5
TONE 7
15° 98.0 96.7 97.7 96.5
45° 104.1 102.3 103.8 102.1
75° 110.1 108.9 109.9 108.7
105° 110.1 108.9 110.4 109.3
135° 103.6 101.9 104.8 103.2
165° 98.2 96.7 99.5 98.3
TONE 8
15° 98.3 97.2 97.2 96.1
45° 104.7 103.5 104.7 103.5
75° 109.2 108.2 108.9 107.9
105° 109.1 108.1 109.5 108.5
135° 103.3 101.9 103.8 102.5
165° 97.5 96.4 98.7 97.7
TONE 15
15° 94.9 93.3 94.4 92.7
45° 100.7 99.1 100.1 98.4
75° 103.6 102.0 103.0 101.3
105° 103.2 101.6 103.8 101.9
135° 99.1 97.5 100.0 98.3
165° 94.6 93.0 95.3 93.5
TONE 19
15° 99.0 98.2 98.5 97.6
45° 98.4 97.6 93.6 92.7
75° 110.9 110.1 110.2 109.2
105° 110.7 110.0 110.5 109.6
135° 102.3 101.5 103.6 102.6
165° 98.4 97.7 99.8 98.8
TONE 20
15° 95.0 93.3 94.9 93.4
45° 101.5 99.8 101.9 100.5
75° 104.2 102.4 103.4 102.0
105° 104.4 102.6 105.1 103.6
135° 99.2 97.5 99.8 98.3
165° 96.1 94.4 96.9 95.5

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Contents
1.0 INTRODUCTION.....................................................................15
2.0 MESSAGES ET AVERTISSEMENTS GÉNÉRAUX DE SÉCURITÉ ..............................15
3.0 INSTALLATION......................................................................16
Accès aux bornes .......................................................................... 16
Détail du câblage........................................................................... 16
Ex d – Détail du cablâge de l’alimentation CA (Types 1 & 2) ......................................... 16
Ex de – Détail du cablâge de l’alimentation CA (Types 3 & 4) ........................................ 17
Ex d & Ex de – Détail du cablâge de I’alimentation CC, 3 phases sans contrôle (Types 5 & 6)............... 17
Ex d & Ex de – Alimentation CC, détail de cablâge pour +ve commun deux phases avec contrôle
(configuration standard) (Types 7 & 8) ......................................................... 18
Ex d & Ex de – Détail du cablâge de l’alimentation CC, jusqu’à 3 phases avec ou sans contrôle
(configuration alternative) (Types 9 & 10) ....................................................... 19
Ex d – Alimentation CC, jusqu’à 5 phases sélectionnables par l’utilisateur avec sélection de phase hors tension
avec ou sans contrôle (Type 11) .............................................................. 19
Ex de – Alimentation CC, jusqu’à 5 phases sélectionnables par l’utilisateur avec sélection de phase hors tension
avec ou sans contrôle (Type 12) .............................................................. 20
4.0 FONCTIONNEMENT .................................................................20
5.0 ENTRETIEN ........................................................................23
6.0 CERTIFICATION/APPROBATIONS ......................................................24
Unités IECEx .............................................................................. 24
Unités certifiées pour les gaz (G) .............................................................. 24
Unités certifiées pour gaz et poussière (GD) ..................................................... 24
Unités ATEX............................................................................... 24
Unités certifiées pour les gaz (G) .............................................................. 24
Unités certifiées pour gaz et poussière (GD) ..................................................... 24
Ces unités bénéficient également des approbations suivantes ....................................... 24
7.0 CONDITIONS SPÉCIALES POUR UTILISATION SÉCURISÉE .................................25
8.0 SÉCURITÉ FONCTIONNELLE ..........................................................26
Introduction ............................................................................... 26
Évaluation de sécurité fonctionnelle ............................................................ 26
Conditions d’utilisation sécurisée .............................................................. 27
9.0 EN54-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

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1.0 Introduction
Cette gamme de générateurs de sons, conçue pour être
utilisée dans des atmosphères gazeuses potentiellement
explosives et poussiéreuses, est disponible dans des
versions adaptées aux groupes de gaz et/ou poussièressuiv-
ants :
La gamme est disponible dans des versions adaptées pour
une utilisation soit avec des groupes de gaz (G), soit avec
des groupes de gaz et poussières (GD).
ote:N l’unité (G) a une puissance de sortie nominale supéri-
eure de 6 dB à celle d’une unité (GD).
Le boîtier Ex est fabriqué en polyester renforcé de bres
de verre résistant aux UV et ayant une robuste balise ther-
moplastique. L’intégration d’un support en acier inoxydable,
des vis du couvercle et des xations garantit un produit
anticorrosion.
Une boîte de raccordement Ex e optionnelle est disponible
(voir section de certication pour davantage de détails).
Une version non certiée est disponible pour une utilisation
dans des atmosphères non explosives.
2.0 Messages et avertissements généraux de
sécurité
Suivre toutes les instructions et messages de sécurité
contenus dans ce manuel pour permettre l’installation
sécurisée de l’appareil. L’appareil doit être exclusivement
installé et entretenu par du personnel/des installateurs sur
site correctement formés.
I. Pour réduire le risque d’incendie dans des atmosphères
dangereuses et de décharges, ne pas mettre l’appareil
sous tension avant d’avoir terminé l’installation et avant
de l’avoir parfaitement scellé et sécurisé.
II. Pour réduire le risque d’incendie dans des atmosphères
dangereuses et de décharges, maintenir l’appareil
totalement fermé lors de la mise sous tension du
circuit.
III. Avant de retirer le couvercle pour toute opération
d’installation ou d’entretien, s’assurer que l’alimentation
de l’appareil est isolée.
IV. Une fois l’installation terminée, tester l’appareil pour
s’assurer de son bon fonctionnement.
v. Une fois l’installation terminée, s’assurer qu’une copie
de ce manuel est mise à la disposition de tous les
opérateurs.
VI. Lors de l’installation de l’appareil, se reporter
aux exigences de sélection, d’installation et de
fonctionnement : par exemple les Réglementations de
câblage de l’IEE et le Code national d’électricité améri-
cain (NEC) pour l’Amérique du Nord. Des exigences
nationales et/ou locales supplémentaires peuvent égale-
ment s’appliquer.
VII. Les terminaisons de câble doivent être conformes aux
exigences spéciques de l’application requise. MEDC
recommande que tous les câbles et conducteurs
soient correctement identiés. Merci de se reporter
au schéma de câblage fourni dans ce manuel (ou au
schéma spécique fourni avec l’unité).
VIII. S’assurer de n’utiliser que les presse-étoupe spéciés
ou certiés et vérier que l’ensemble soit bien protégé
et mis à la terre.
IX. S’assurer de n’utiliser que les bouchons obturateurs
spéciés ou certiés pour obturer les entrées de
presse-étoupe non utilisées et vérier que le degré de
protection NEMA/IP de l’unité soit maintenu.
X. MEDC recommande l’utilisation d’une pâte d’étanchéité
telle que HYLOMAR PL32 sur tous les letages des
presse-étoupe et des bouchons obturateurs et/ou d’une
rondelle d’étanchéité adaptée, an de maintenir le degré
de protection IP de l’unité.
XI. Sur les unités Exde, une rondelle d’étanchéité adaptée
doit être montée sur tous les presse-étoupe et les
bouchons obturateurs présents dans le boîtier Exe.
XII. L'utilisateur nal ou l'installateur doit s'assurer que cet
équipement est protégé contre les inuences extérieures
qui pourraient nuire à la protection contre les explosions,
ou contacter le fabricant en cas de doute sur son adéqua-
tion à l'environnement dans lequel il doit être installé.
XIII. Unités Ex d
La borne de terre interne
2.0 GENERAL SAFETY MESSAGES AND WARNINGS
All instructions and safety messages in this manual must be followed to allow safe installation of the device. The
device must only be installed and maintained by correctly trained site personnel/installers.
i. To reduce the risk of ignition of hazardous atmospheres and shock, do not apply power to the device until
installation has been completed and the device is fully sealed and secured.
ii. To reduce the risk of ignition of hazardous atmospheres and shock, keep device tightly closed when the
circuit is energised.
iii. Before removing the cover for installation or maintenance, ensure that the power to the device is isolated.
iv. Following installation, test the device to ensure correct operation.
v. Following installation ensure a copy of this manual is made available to all operating personnel
vi. When installing the device, requirements for selection, installation and operation should be referred to e.g.
IEE Wiring Regulations and the ‘National Electrical Code’ in North America. Additional national and/or
local requirements may also apply.
vii. Cable termination should be in accordance with the specification applying to the required application.
MEDC recommends that all cables and cores should be correctly identified. Please refer to the wiring
diagram in this manual (or separate diagram provided with the unit).
viii. Ensure that only the correct listed or certified cable glands are used and that the assembly is shrouded and
correctly earthed.
ix. Ensure that only the correct listed or certified stopping plugs are used to blank off unused gland entry
points and that the NEMA/IP rating of the unit is maintained.
x. MEDC recommend the use of a sealing compound such as HYLOMAR PL32 on the threads of all glands
and stopping plugs and/or a suitable sealing washer in order to maintain the IP rating of the unit.
xi. On Exde units, a suitable sealing washer must be fitted to all glands and stopping plugs fitted into the Exe
enclosure.
x
.
© Eaton MEDC Ltd 2017 06/17
xii. Ex d Units
The internal earth terminal must be used for protective earthing when required. Do not remove the
internal ground strap from the earth terminal where fitted.
For units with metric entries; gland continuity and earthing my be achieved with an optional external earth
plate. If the external plate is fitted, a thread sealing compound such as HYLOMAR PL32 must be employed to
maintain the IP rating of the unit.
Ex d e Units
The internal/external earth stud must be used for equipment grounding when required. Gland continuity is
achieved if the optional internal earth plate is fitted.
x
xiii. When installing the device, MEDC recommends the use of stainless steel fasteners. Ensure that all nuts,
bolts and fixings are secure.
xiv. The unit should be positioned such that debris, dust or water cannot settle in the re-entrant horn.
xv. The unit should be positioned such that any solid object, not part of the equipment, is a minimum of 40mm
from the Ex d flamepath joint
.
1.0 INTRODUCTION
This range of sounders, intended for use in potentially explosive gas and dust atmospheres, is available in versions
suitable for use in the following gas/dust groups:
The range is available in versions suitable for use in either gas (G) or gas and dust (GD) groups.
Note: (G) unit has nominally 6dB higher output than (GD) unit
The Ex enclosure is manufactured from a UV stable glass reinforced polyester with a rugged thermoplastic flare.
Stainless steel mounting bracket, cover screws and fixings are incorporated throughout thus ensuring a corrosion
free product.
An optional Ex e terminal chamber is available (see certification section for further details).
An uncertified version is available for use in non-explosive atmospheres.
x
x
3.0 INSTALLATION
The unit is mounted via 2 off Ø9mm fixing holes in the U-shaped stirrup/mounting bracket. If required, the unit can
be initially placed via the Ø13mm central hole in the stirrup. The unit can then be rotated to the required position
and fixed via the other holes.
If ordered with the unit, a swivel mounting bracket option is available to allow further rotational adjustment to the
unit.
The fixing holes have been designed to accept an M8 screw or bolt.
doit être utilisée pour une
mise à la terre de protection lorsque nécessaire. Ne pas
retirer la tresse de masse de la borne de terre, quand
elle existe.
Pour les unités avec entrées métriques ; la continuité du
presse-étoupe et la mise à la terre peuvent être réalisés
avec une plaque de masse externe en option. Si la
plaque externe est montée, un composé d’étanchéité
de letage comme HYLOMAR PL32 doit être employé
pour maintenir la classication IP de l’appareil.
Unites Ex d e
La tige de mise à la terre interne/ externe doit étre utili-
sée pour la mise à la terre de l’équipement au besoin.
La continuité du presse-étoupe est réalisée si la plaqu e
de mise à la terre interne en option estinstallée.
XIV. MEDC recommande l’utilisation d’éléments de xation
en acier inoxydable lors de I’installation de l’appareil.
S’assurer que tous les écrous, les boulons et les xa-
tions sont sécurisés.
XV. L’unite doit étre positionnée de façon que les débris,
la poussiére ou l’eau ne puissent pas pénétrer dans le
pavillon.
XVI. L’unité doit étre placée de telle sorte que tout objet
solide ne faisant pas partie de l’equipement , se trouve
à un minimum de 40 mm du joint Ex d situé sur le
parcours des ammes.
XVII. L’acheteur doit informer le fabricant de tout impact
externe ou de toute substance agressive
auxquels l’appareil peut être exposé.

16 SOUNDER - DB3B TM264 July 2020 www.eaton.com
Sounder - DB3B
Francais
3.0 Installation
L’unité est montée à l’aide de 2 trous de fixation de 9 mm
de diamètre sur l’étrier et/ou support en forme de U. Si
nécessaire, l’unité peut être mise en place au départ à
l’aide du trou central de 13 mm de diamètre prévu dans
l’étrier. L’unité peut ensuite être tournée en position
requise et fixée à l’aide des autres trous.
Si elle est commandée avec l’unité, une option
comportant un étrier de montage pivotant est disponible
pour permettre un réglage supplémentaire en rotation
del’unité.
Les trous de fixation ont été conçus pour accueillir une vis
ou un boulon M8.
Accès aux bornes
Sur les versions Ex d, le couvercle est fixé à l’aide de 6
vis imperdables M5 (à l’aide d’une clé hexagonale/à 6
pans de 4 mm). Une fois que les fixations du couvercle
sont dévissées, il est possible de démonter le couvercle
en le soulevant pour accéder à l’intérieur. Les fixations du
couvercle sont imperdables et restent liées au couvercle.
Sur les versions Ex de, le couvercle amovible est fixé
à l’aide de 3 vis imperdables M5 (à l’aide d’une clé
hexagonale/à 6 pans de 4 mm). Une fois que les fixations
du couvercle sont dévissées, il est possible de démonter
le couvercle en le soulevant pour accéder à l’intérieur. Les
fixations du couvercle sont imperdables et restent liées
au couvercle. Toutes les vis des bornes, utilisées ou non,
doivent être serrées à fond.
Une fois l’opération de terminaison des câbles achevée,
remettre le couvercle en place sur le corps en faisant
attention à ne pas endommager les surfaces de contact.
Serrer uniformément les vis du couvercle. Sur les
versions Ex de certifiées, s’assurer que le couple maximal
est bien appliqué aux vis du couvercle, comme indiqué
sur le couvercle Ex e. S’assurer que le joint torique est
correctement fixé sur le couvercle pendant le remontage.
Sur les versions Ex d certifiées, s’assurer que la distance
maximale nécessaire de 0,04 mm est bien maintenue
entre le couvercle et la base après l’assemblage.
Détail du câblage
L'unité est disponible en un certain nombre de
configurations de base listées ci-dessous. Voir section 9
pour les configurations spécifiques à la norme EN54-3.
1. Ex d – entrée CA, une seule phase.
2. Ex d – entrée CA, deux phases avec sélection de la
phase hors tension.
3. Ex de – entrée CA, une seule phase.
4. Ex de – entrée CA, deux phases avec sélection de la
phase hors tension.
5. Ex d - Alimentation CC, jusqu’à 3 phases
sélectionnables par l’utilisateur sans contrôle.
6. Ex de - Alimentation CC, jusqu’à 3 phases
sélectionnables par l’utilisateur sans contrôle.
7. Ex d - Alimentation CC, jusqu’à 2 phases
sélectionnables par l’utilisateur avec EOL/contrôle
(configuration standard).
8. Ex de - Alimentation CC, jusqu’à 2 phases
sélectionnables par l’utilisateur avec EOL/contrôle
(configuration standard).
9. Ex d - Alimentation CC, jusqu’à 3 phases
sélectionnables par l’utilisateur avec EOL/contrôle en
option (configuration alternative).
10. Ex de - Alimentation CC, jusqu’à 3 phases
sélectionnables par l’utilisateur avec EOL/contrôle en
option (configuration alternative).
11. Ex d - Alimentation CC, jusqu’à 5 phases
sélectionnables par l’utilisateur avec sélection de
phase hors tension avec ou sans contrôle.
12. Ex de - Alimentation CC, jusqu’à 5 phases
sélectionnables par l’utilisateur avec sélection de
phase hors tension avec ou sans contrôle.
Ex d – Détail du cablâge de l’alimentation CA
(Types 1 & 2)
• Type 1 : Connecter les fils d’alimentation actif et neutre
aux bornes comme indiqué en détail dans le schéma
de câblage. L’unité est fournie avec la liaison entre
R1 et R0 fixée aux bornes. Lorsque l’alimentation est
appliquée à l’unité, le son de la phase 1 est émis, selon
la sélection choisie sur l’interrupteur DIP à 5 voies.
• Type 2 : Connecter les fils d’alimentation actif et neutre
aux bornes comme indiqué en détail dans le schéma
de câblage. L’unité est fournie sans liaison entre R1
et R0. Connecter les fils et les interrupteurs distants
aux bornes R0, R1 et R2 comme indiqué. Lorsque
l’alimentation est appliquée initialement à l’unité,
aucun son n’est émis. Lorsque l’interrupteur connecté
à R1 estfermé, le son de la phase 1 est émis, selon
la sélection choisie sur l’interrupteur DIP à 5 voies
de l’ensemble électronique. Lorsque l’interrupteur
connecté à R2 est fermé, c’est le son prélectionné pour
la phase 1 qui est émis. Voir la table des sons 2 pour
les détails des sons présélectionnés.
ote:N Si l’on ferme les deux interrupteurs, aucun son
n’est émis.
CÂBLAGE
PAR CLIENT
CAVITE DB3B Ex d
R1
R2
R0
N
N
L
L
ENSEMBLE
ÉLECTRONIQUE
BORNES D'ACTIVATION
DE PHASE HORS TENSION
ENTRÉE ACTIVE
SORTIE ACTIVE
ENTRÉE NEUTRE
SORTIE NEUTRE
PHASE 1
PHASE 2
COMMUNE