EATON DB3B Medc Sounder Instruction Manual

Technical manual
Sounder – DB3B

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. The sale of the product shown in this literature is subject to the terms and conditions outlined in appropriate Eaton selling policies or other contractual agreements 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 otherwise 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.

Introduction

This range of sounders, is 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: 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 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.

General safety messages and  warnings

All instructions and safety messages in this manual must be followed to allow the safe installation of the device. The device must only be installed and maintained by correctly trained site personnel/installers.

1. To reduce the risk of ignition of hazardous atmospheres and shock, do not apply power to the device until the installation has been completed and the device is fully sealed and secured.

2. To reduce the risk of ignition of hazardous atmospheres and shock, keep the device tightly closed when the circuit is energized.

3. Before removing the cover for installation or maintenance, ensure that the power to the device is isolated.

4. Following installation, test the device to ensure correct operation.

5. Following installation ensure a copy of this manual is made available to all operating personnel.

6. 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.

7. 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 the separate diagram provided with the unit).

8. Ensure that only the correct listed or certified cable glands are used and that the assembly is shrouded and correctly earthed.

9. 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.

10. MEDC recommends 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.

11. On Exide units, a suitable sealing washer must be fitted to all glands and stopping plugs fitted into the Exe enclosure.

12. The end-user or installer shall ensure that this equipment is protected against external influences which could adversely affect the explosion protection, or contact the manufacturer if in doubt of the suitability of this equipment in the environment in which it is to be installed.

13. 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.

14. When installing the device, MEDC recommends the use of stainless steel fasteners. Ensure that all nuts, bolts, and fixings are secure.

15. The unit should be positioned such that debris, dust, or water cannot settle in the re-entrant horn.

16. The unit should be positioned such that any solid object, not part of the equipment, is a minimum of 40mm from the Ex d flame path joint.

17. The purchaser should make the manufacturer aware of any external effects or aggressive substances that the equipment may be exposed to.

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.

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 on the cover.
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 maintained 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.

Note: Closing both switches will produce no tone.

Ex d – AC input wiring diagram (Types 1 & 2)

• 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.

Ex de – AC input wiring diagram (Types 3 & 4)

Ex d & Ex de – DC input, 3 stages 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 terminal. 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 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 stage 1 +ve and common -ve terminals. Stage 2 is produced when power is applied across stage 2 +ve and common -ve terminals. Stage 3 is produced when power is applied across stage 3 +ve and common -ve terminals.

All versions are supplied with terminals to allow loop-in loop-out connection of the supply wires.

Note: 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 stages without monitoring wiring details (Types 5 & 6)

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 terminal. 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.
Ex d & Ex de – DC input, dual-stage common +ve diagram (Types 7 & 8)

Ex d & Ex de – DC input, up to 3 stages with or without monitoring (alternative configuration) wiring details (Types 9 & 10)
Note: This alternative configuration must be specified when ordering the unit.

This type can be connected either as a three-stage common –configuration, or if an optional EOL is specified it can be configured as a dual-stage common –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 terminal. 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 terminal. 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.

Ex d & Ex de – DC input, up to 3 stage diagrams (Types 9 & 10)

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 is produced. See tone table 2 for details of pre-selected tones.
Note:   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.

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.

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 is produced. See tone table 2 for details of pre-selected tones.
Note: 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.

The unit is fitted with 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:

Tone table 1:

Tone no.| Tone freq/description| Switch setting 12345| Tone description| Nominal SPL (dB(A) @11111)
---|---|---|---|---
1| Alt Stages 800/970 Hz at 1/4 sec| 11111| | 112
2| Sweeping 800/970 Hz at 7 Hz| 11110| Fast Sweep (LF)| 111
3| Sweeping 800/1000 Hz at 1 Hz| 11101| Medium Sweep (LF)| 113
4| Continuous at 2850 Hz| 11100| | 111
5| Sweeping 2400-2850 Hz at 7 Hz| 11011| Fast Sweep| 112
6| Sweeping 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
9| Alt 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| ht 660 Hz 1.8 sec on 1.8 sec off| 0111| 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| 3×970 Hz pulses 0.5 off, 1.5 off| 00111| | 112
26| 3×2850 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| |

Note:   If special tones were requested at the time of order, 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.

Note:
Tone table 2: Pre-selected tone details for voltage-free activation stages:

Stage 1| Stage 2| Stage 3| Stage 4| Stage 5| Stage 2
---|---|---|---|---|---
1| Alt Tones 800/970Hz at 1/4 sec| 11111| 114| T10| T11| T8| T14
2| Sweeping 800/970Hz at 7 Hz| 11110| 114| T10| T1| T8| T14
3| Sweeping 800/970Hz at 1 Hz| 11101| 114| T10| T1| T8| T14
4| Continuous at 2850Hz| 11100| 114| T10| T1| T8| T14
5| Sweeping 2400-2850Hz at 7Hz| 11011| 114| T10| T1| T8| T14
6| Sweeping 2400-2850Hz at 1 Hz| 11010| 114| T10| T1| T8| T14
7| Slow Whoop| 11001| 114| T10| T1| T8| T14
8| Sweep 1 200-500Hz at 1 Hz| 11000| 114| T10| T1| T6| T14
9| Alt Tones 2400/2850Hz at 2Hz| 10111| 114| T10| T1| T8| T14
10| Int Tone of 970Hz at 1 Hz| 10110| 114| 112| T1| T8| T14
11| Alt Tones 800/970Hz at 7/8Hz| 10101| 114| T10| T1| T8| T14
12| Int Tone at 2850Hz at 1 Hz| 10100| 114| T10| T1| T8| T14
13| 970Hz at 1/4 sec on 1 sec off| 10011| 114| 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| 114| T10| T1| T8| T14
16| Int 660Hz 150 mS on 150 mS off| 10000| 114| T10| T1| T8| T14
17| Int 660Hz 1.8 sec on 1.8 sec off| 01111| 114| T10| T1| T8| T14
18| Int 660Hz 6.5 sec on 13 sec off| 01110| 114| T10| T1| T8| T14
19| Continuous 660Hz| 01101| 114| T10| T1| T8| T14
20| Alt 554/440Hz at 1 Hz| 01100| 114| T10| T1| T8| T14
21| Int 660Hz at 7/8Hz| 01011| 114| T10| T1| T8| T14
22| Int 2850Hz 150 mS on 100 mS off| 01010| 114| T10| T1| T8| T14
23| Sweep 800-970Hz at 50Hz| 01001| 114| T10| T1| T8| T14
24| Sweep 2400-2850Hz at 50Hz| 01000| 114| T10| T1| T8| T14
25| 3x970Hz pulses 0.5 off, 1.5 off| 00111| 114| T10| T1| T8| T14
26| 3x2850Hz pulses 0.5on/0.5off, 1.5 off| 00110| 114| T10| T1| T8| T14
27| Int 3100Hz 0.32s on/0.68s off| 00101| 114| 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| | | | |

General arrangement

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 the below diagram for details of the flameproof joints found in the unit. WARNING! – The flameproof joints detailed below are not intended to be repaired.

If the unit requires cleaning, then only clean the exterior with a damp cloth to avoid electrostatic 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.

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 temperatureranges 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 temperature 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

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.

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:

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. No more than one single or multiple strand wiring leads shall be connected to either side of any terminal unless multiple conductors have been joined in a suitable manner, e.g. two conductors into a single insulated bootlace 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:

Functional safety

Introduction
The DB3B Sounder 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 lightweight combined with corrosion resistance is required.
The safety function of the Sounder is to provide a predetermined 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.

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 (1001)| DB3B Sounder
Redundant Mode (loo2)| Verdict
---|---|---|---
Architectural constraints Safe Failure Fraction (SFF)| HFT=O| HFT=1| Type B
66.%| 66.%| SIL 1(1oo1) SIL 2 (loo2)
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.E-04| 5.E-05| SIL 3(1oo1)
Average freq. of dangerous failure (high demand-PFH)[h-1]| 1.E-07| 1.E-08| SIL 2(1ool)
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 (loo2) due to SFF value.

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 the 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, and 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.

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.

54-3 Compliant Tones Data

| Angle| Minimum Volume dB(A)
---|---|---
Horizontal Plane| Vertical Plane
Max 58V| Min 11V| Max 58V| Min 11V
TONE 3| 15°| 98.| 97.| 98.| 99.
45°| 102.| 101.| 101.| 100.
75°| 110.| 109.| 110.0| 109.
105°| 110.| 109.| 111.| 110.
135°| 103.| 102.0| 105.| 103.
165°| 98.| 97.| 100.| 99.
TONE 7| 15°| 98.0| 97.| 98.| 97.
45°| 104.| 102.| 104.| 102.
75°| 110.| 109.| 110.| 109.
105°| 110.| 109.| 110.| 109.
135°| 104.| 102.| 105.| 103.
165°| 98.| 97.| 100.| 98.
TONE 8| 15°| 98.| 97.| 97.| 96.
45°| 105.| 104.| 105.| 104.
75°| 109.| 108.| 109.| 108.
105°| 109.| 108.| 110.| 109.
135°| 103.| 102.| 104.| 103.
165°| 98.| 96.| 99.| 98.
1 1 TONE 15| 15°| 95.| 93.| 94.| 93.
45°| 101.| 99.| 100.| 98.
75°| 104.| 102.0| 103.0| 101.
105°| 103.| 102.| 104.| 102.
135°| 99.| 98.| 100.0| 98.
165°| 95.| 93.0| 95.| 94.
TONE 19| 15°| 99.0| 98.| 99.| 98.
45°| 98.| 98.| 94.| 93.
75°| 111.| 110.| 110.| 109.
105°| 111.| 110.0| 111.| 110.
135°| 102.| 102.| 104.| 103.
165°| 98.| 98.| 100.| 99.
TONE 20| 15°| 95.0| 93.| 95.| 93.
45°| 102.| 100.| 102.| 101.
75°| 104.| 102.| 103.| 102.0
105°| 104.| 103.| 105.| 104.
135°| 99.| 98.| 100.| 98.
165°| 96.| 94.| 97.| 96.

Changes to the products, the information contained in this document, and to prices are reserved; so are errors and omissions. Only order confirmations and technical documentation by Eaton are binding. Photos and pictures also do not warrant a specific layout or functionality. Their use in whatever form is subject to prior approval by Eaton. The same applies to Trademarks (especially Eaton, Moeller, and Cutler-Hammer). The Terms and Conditions of Eaton apply, as referenced on Eaton Internet pages and Eaton order confirmations.
Eaton is a registered trademark.
All trademarks are property of their respective owners.

Sounder – dB3B TM264 February 2022 www.eaton.com

Eaton
Unit B Sutton Parkway
Oddicroft Lane
Sutton-In-Ashfield
NG17 5FB
United Kingdom
© 2022 Eaton
All Rights Reserved
Publication No. TM264 / Issue F
February 2022

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