MEDC DB15 User Manual

Technical Manual for the

Sounder – DB15

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.

© MEDC 2001 07/01

1. INTRODUCTION

These sounder units have been designed for use in harsh environmental
conditions.

2. INSTALLATION
General

When installing and operating electrical equipment, requirements for selection,
installation and operation should be referred to.

Additional national and/or local requirements may apply.

Ensure that all nuts, bolts and fixings are secure.
Ensure that appropriate stopping plugs are used to blank off unused gland entry

points. Sealing compound should be applied to stopping plug threads to maintain
the IP rating of the unit.

The DB15 is mounted via 2 x Ø 7mm (0.28”) fixing holes in the ‘u’ shaped
stirrup/mounting bracket.

If required, the unit can be initially placed via the Ø 13mm (0.51") central hole in
the stirrup. The unit can be rotated to the required position and fixed via the two
other holes.

The fixing holes accept M6 screws or bolts. MEDC recommend the use of stainless
steel screws.

The elevation of the unit can be adjusted by loosening the 2 x M6 screws which
fasten the stirrup to the sounder. The unit can then be adjusted by rotating to the
required position and then tightening the M6 screws. The DB15 should be
positioned such that debris, dust or water 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 2 off screws holding the cover to the unit. Remove to gain access to
the interior of the enclosure.

Cable termination should be in accordance with specifications applying to the
application. MEDC recommend that all cables and cores should be fully identi­fied.

Ensure that appropriate cable glands are used and that the assembly is shrouded
and correctly earthed.

07/01 © MEDC 2001

All cable glands should be of an equivalent IP rating to that of the sounder.
In order to maintain the IP rating of the unit, the cable glands should be sealed to

the unit using a sealing washer (if possible) and sealing compound.
Once termination is complete, carefully push the cover back onto the unit, avoid-

ing damage to the seal. Tighten the 2 off cover screws evenly, to ensure correct
sealing.

GENERAL ARRANGEMENT

3. OPERATION

The unit is initiated directly from the power source.
For all versions, a 5-way DIL switch selects the tone required from the list shown.
The DB15P includes two 5-way DIL switches to select any two tones from the list.

These units can be switched between any two of the tones listed by either:-

• Reversing the polarity of the power supply, or

• By a 3 wire common +ve system, switching between the two –ve lines.

© MEDC 2001 07/01

SWITCH TONE Nom O/P

TONE FREQ/DESCRIPTION SETTING DESCRIPTION (dB(A)

12345 @1M)
1 Alt Tones 800/970 Hz at 1/4 sec 11111 114
2 Sweeping 800/970 Hz at 7Hz 11110 Fast Sweep(LF) 117
3 Sweeping 800/970 Hz at 1 Hz 11101 Med Sweep(LF) 117
4 Continuous at 2850 Hz 11100 112
5 Sweeping 2400-2850 Hz at 7 Hz 11011 Fast Sweep 109
6 Sweeping 2400-2850 Hz at 1 Hz 11010 110
7 Slow Whoop 11001 Slow Whoop 117
8 Sweep 1200-500 Hz at 1 Hz 11000 Din Tone 116
9 Alt Tones 2400/2850 Hz at 2 Hz 10111 112

10 Int Tone of 970 Hz at 1 Hz 10110 Back-Up Alarm(LF) 113
11 Alt Tones 800/970 Hz at 7/8 Hz 10101 115
12 Int Tone at 2850 Hz at 1Hz 10100 Back Up Alarm(HF) 112
13 970Hz at 1/4 sec on 1 sec off 10011 114
14 Continuous at 970 Hz 10010 113
15 554Hz for 100mS / 440 Hz for 400mS 10001 French Fire Sound 104
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 109
18 Int 660 Hz 6.5 sec on 13 sec off 01110 Swedish Fire Alarm 109
19 Continuous 660 Hz 01101 Swedish Fire Alarm 109
20 Alt 554/440 Hz at 1 Hz 01100 Swedish Fire Alarm 105
21 Int 660 Hz at 7/8 Hz 01011 Swedish Fire Alarm 109
22 Int 2850 Hz 150 mS on 100 mS off 01010 Pelican Crossing 108
23 Sweep 800-970 Hz at 50 Hz 01001 Low Freq Buzz 115
24 Sweep 2400-2850 Hz at 50 Hz 01000 High Freq Buzz 110
25 3 970Hz pulses 0.5on/0.5off, 1.5 off 00111 113
26 3 2850Hz pulses 0.5on/0.5off, 1.5 off 00110 113
27 Int 3100 Hz 0.32s on / 0.68s off 00101 110
28 Spare/Customer Tone 00100
29 Spare/Customer Tone 00011
30 Spare/Customer Tone 00010
31 Spare/Customer Tone 00001
32 Spare/Customer Tone 00000

07/01 © MEDC 2001

4. MAINTENANCE

During the working life of the unit, little or no maintenance is required. However,
if abnormal or unusual environmental conditions occur due to plant damage or
accident etc., then visual inspection is recommended.

If a fault should occur, it is recommended that the unit be returned to MEDC for
repair. All parts are replaceable.

If you have acquired a significant quantity of units, it is recommended that spares
are also made available. Please discuss your requirements with the Technical
Sales Engineers at MEDC.

© MEDC 2001 07/01

07/01 © MEDC 2001

© MEDC 2001 07/01

MEDC Ltd, Colliery Road, Pinxton, Nottingham NG16 6JF, UK.
Tel: [phone] Fax: [phone]
Sales Enq. Fax: [phone] Sales Orders Fax: [phone] MEDC Stock No.
E-mail: [e-mail] Web: www.medc.com TM114-ISSA