MEDC DB1 User manual

© Eaton MEDC Ltd 2018 01/18
Technical Manual for the Sounders – DB1 & DB1H
Manuel technique pour sondeurs DB1 et DB1H
Technisches Handbuch für die Summer DB1 und DB1H
Manual Técnico para os dispositivos de
sinalização audível – DB1 e DB1H
Please note that every care has been taken to ensure the accuracy of our technical manual. We do not, however,
accept responsibility for damage, loss or expense resulting from any error or omission. We reserve the right to make
alterations in line with technical advances and industry standards.
Toutes les précautions ont été prises pour garantir l'exactitude du contenu de cette notice technique. Néanmoins,
nous déclinons toute responsabilité à l'égard des éventuels dégâts, pertes ou frais résultant de la présence dans
cette documentation d'une quelconque erreur ou omission. Nous nous réservons le droit d'apporter à cette notice
toute modification rendue nécessaire du fait de progrès techniques ou de l'évolution des normes industrielles.
Es wurden alle erforderlichen Maßnahmen getroffen, um die Genauigkeit unseres technischen Handbuchs
sicherzustellen. Wir übernehmen allerdings keine Haftung für Schäden, Verluste oder Kosten, die durch Fehler oder
Auslassungen entstehen. Wir behalten uns vor, entsprechend der technischen Fortschritte und Branchenstandards
Änderungen vorzunehmen.
Nota que foram feitos todos os esforços para assegurar a ausência de erros no nosso manual técnico. No entanto,
não no responsabilizamos por eventuais danos, perdas ou despesas que possam resultar de algum erro ou omissão.
Reservamos o direito de efectuar alterações para reflectir avanços técnicos e normas da indústria.

01/18 © Eaton MEDC Ltd 2018

English
1.0 INTRODUCTION
This range of light weight, flameproof sounders has been designed with a high weatherproof rating to cope with
the harsh environmental conditions found offshore and onshore in the oil, gas and petrochemical industries
New electronic circuitry allows the DB1 and DB1H to be switched between two user selectable tones by either
reversing the polarity, or connecting a second voltage supply (dual tone facility is available on dc units only).
The higher output DB1H is particularly suitable for noisy environments.
2.0 INSTALLATION
General
When installing and operating explosion-protected equipment, requirements for selection, installation and op-
eration should be referred to e.g. IEE Wiring Regulations and the ‘National Electrical Code’ in North America.
Additional national and/or local requirements may apply.
Ensure that all nuts, bolts and fixings are secure.
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. MEDC recommend the use of a sealing compound such
as ‘HYLOMAR PL32’ on the threads of glands and stopping plugs in order to maintain the IP or NEMA rating
of the unit.
The sounder is mounted via the 2 off Ø9mm fixing holes. The fixing holes have been designed to accept an M8
screw or bolt.
MEDC recommend the use of stainless steel screws.
The unit has been designed and certified to operate at any attitude – from horizontal to vertical however, it is
important to note that the alignment of the sounder should ensure that:-
1. Dust or debris cannot lodge or settle in the re-entrant horn
2. Water from hoses, jets or rain cannot settle in the re-entrant horn
Cable Termination
CAUTION: Before removing the cover assembly, ensure that the power to the unit is isolated.
Unscrew the 4 off M6 screws (5.0mm A/F hexagon key) holding the cover assembly to the base. Keep screws
in a safe accessible place as they are not retained in the cover.
Before lifting the cover, gently twist the cover assembly clockwise then anti-clockwise to break the seal.
Continue to gently twist the cover clockwise and anti-clockwise while gently lifting the cover assembly away from
the base of the enclosure to gain access to the interior.
The cover assembly is connected to the cover by a nylon restraining strap to prevent loss.
Cable termination should be in accordance with specifications applying to the required application. MEDC
recommends that all cables and cores should be correctly identified. Please refer to the wiring diagram provided
with the product and see below for wiring options.
Ensure that only the correct listed or certified cable glands are used and that the assembly is shrouded and
correctly earthed.
All cable glands should be of an equivalent NEMA/IP rating to that of the unit and integrated with the unit such
that this rating is maintained.
The internal earth terminal, where fitted, must be used for the equipment grounding connection and the external
terminal is for a supplementary bonding connection where local codes or authorities permit or require such a
connection.
© Eaton MEDC Ltd 2018 01/18

Once termination is complete ensure that both the spigot of the cover and the mating face of the body are well
covered with a suitable anti-seize compound. Carefully lower the cover assembly back onto the base, avoiding
damage to the mating surfaces, ensuring the O-ring is correctly seated in its groove during re-assembly. Replace
the 4 off M6 screws (5.0mm A/F hexagon key) into the holes in the cover assembly and tighten evenly. Ensure
the required gap (0.2mm Max.) is maintained between the cover and the base.
Wiring options
The unit is available in three basic configurations:
1. DC input, single tone
2. DC input, dual tone
3. AC input, single tone
Type 1 has 8 terminals labelled as TB1 to TB8. The supply should be connected to TB1 (+ve), TB3 (-ve), loop out
on TB2 & TB4 respectively.
Type 2 has 8 terminals labelled as TB1 to TB8.
For a 2 wire system, the supply should be connected to TB1 (+ve), TB3 (-ve), loop out on TB2 & TB4 respectively
to produce tone 1. Tone 2 is produced when the polarity of the supply is reversed TB1 (-ve), TB3 (+ve), loop out
on TB2 & TB4 respectively. Optionally, an EOL resistor may be fitted between TB2 & TB4.
For a 3 wire system, the supply should be connected to TB1 (common +ve), TB3 (-ve1) & TB5 (-ve2), loop out
on TB2, TB4 & TB6 respectively. Tone 1 is produced when the supply is connected to TB1 (common +ve) & TB3
(-ve1). Tone 2 is produced when the supply is connected to TB1 (common +ve) & TB5 (-ve2). Alternatively Tone
2 may also be produced by reversing the polarity of the Tone 1 supply TB1 (-ve), TB3 (+ve), loop out on TB2 &
TB4 respectively. Optionally and EOL resistor can be fitted between TB2 & TB4 or TB2 & TB6.
Type 3 has 8 terminals labelled as TB1 to TB8. The supply should be connected to TB1 (Live), TB3 (Neutral), loop
out on TB2 & TB4 respectively.
3.0 OPERATION
The operating voltage of the unit is stated on the certification label.
The DC version can be operated as a dual tone unit. The unit can be switched between the two tones by
either:-
a. Connecting as a 2 wire system and reversing the polarity of the supply
With TB1 (+ve) and TB3 (-ve) tone 1 is produced as set by DIL switch ‘TONE 1’.
With TB1 (-ve) and TB3 (+ve) tone 2 is produced as set by DIL switch ‘TONE 2’.
b. Connecting as a 3 wire common +ve system and switching between the two –ve lines
With TB1 (+ve) and TB3 (-ve) tone 1 is produced as set by DIL switch ‘TONE 1’.
With TB1 (+ve) and TB5 (-ve) or TB1 (-ve) and TB3 (+ve) tone 2 is produced as set by DIL switch ‘TONE 2’
The AC version can be operated as a single tone unit only.
01/18 © Eaton MEDC Ltd 2018

Tones
For all versions, a 5-way DIL switch selects the tone required. The standard settings are shown in table 1 be-
low:

TONE
No.
TONE FREQ/DESCRIPTION
SWITCH
SETTING
12345
TONE DESCRIPTIONNominal SPL
(dB(A) @ 1M)
1Alt Tones 800/970 Hz at 1/4 sec11111 114
2Sweeping 800/970 Hz at 7 Hz11110Fast Sweep (LF)114
3Sweeping 800/970 Hz at 1 Hz11101Medium Sweep (LF)114
4Continuous at 2850 Hz11100 109
5Sweeping 2400-2850 Hz at 7 Hz11011Fast Sweep114
6Sweeping 2400-2850 Hz at 1 Hz11010 114
7Slow Whoop11001Slow Whoop115
8Sweep 1200-500 Hz at 1 Hz11000Din Tone115
9Alt Tones 2400/2850 Hz at 2 Hz10111 111
10Int Tone of 970 Hz at 1 Hz10110Back-up Alarm (LF)114
11Alt Tones 800/970 Hz at 7/8 Hz10101 114
12Int Tone at 2850 Hz at 1Hz10100Back-up Alarm (HF)109
13970 Hz at 1/4 sec on 1 sec off10011 114
14Continuous at 970 Hz10010 114
15554 Hz for 0.1S/440 Hz for 0.4S10001French Fire Sound101
16Int 660 Hz 150 mS on 150 mS off10000Swedish Fire Alarm106
17Int 660 Hz 1.8 sec on 1.8 sec off01111Swedish Fire Alarm106
18Int 660 Hz 6.5 sec on 13 sec off01110Swedish Fire Alarm104
19Continuous 660 Hz01101Swedish Fire Alarm106
20Alt 554/440 Hz at 1 Hz01100Swedish Fire Alarm100
21Int 660 Hz at 7/8 Hz01011Swedish Fire Alarm106
22Int 2850 Hz 150 mS on 100 mS off01010Pelican Crossing109
23Sweep 800-970 Hz at 50 Hz01001Low Freq. Buzz113
24Sweep 2400 -2850 Hz at 50 Hz01000High Freq. Buzz112
253x970 Hz pulses 0.5 off, 1.5 off00111 113
263x2850 Hz pulses 0.5on/0.5off, 1.5 off00110 109
27Int 3100 Hz 0.32s on/0.68s off00101 110
28Spare / Customer special tone00100 
29Spare / Customer special tone00011 
30Spare / Customer special tone00010 
31Spare / Customer special tone00001 
32Spare / Customer special tone00000 

Table 1
GENERAL ARRANGEMENT
© Eaton MEDC Ltd 2018 01/18