background image

3. OPERATION

3.1 The unit is initiated directly from the power source.

The DB1P  & DB1HP units include two 5-way DIL switches to select any two
tones from the list. Use SW2 to select tone 1 & SW1 to select tone 2.

3.2 Single Stage Alarm (d.c. version only)

To operate as a single stage alarm, set the appropriate tone using SW1 and
connect input wires to TB1 (+ve) (red) and TB5 (–ve) (blue). Loop in and loop
out is then TB2 and TB6.
To operate in supervisory mode, reverse the voltage between TB1 and TB5
(such that TB1 is -ve and TB5 +ve).
Note that there is a diode mounted on the PCB which will inhibit the operation
of the sounder in the supervisory (reverse voltage) mode.

3.3 Two Stage alarm (d.c. version only)

To operate as a two stage alarm, set the required tones using SW2 for tone 1
and SW1 for tone 2.
3.3.1 Reverse Polarity Set Up

Connect input wires to TB1 (+ve) (red) and TB3 (–ve) (black), tone 1
will sound. Reverse the voltage so that TB3 is +ve and TB1 is –ve, tone
2 will sound.

3.3.2 ve Set Up

Connect input wires to TB1 (+ve) and separate –ve’s to TB3 and TB5.
When TB3 is –ve tone 1 will sound, when TB5 is –ve tone 2 will sound.

3.4 Single Stage Alarm (a.c. version)

When the unit is powered with a.c. only a single stage alarm is available.
Tones should be selected using SW1. Connect input wires between TB1 and
TB3.

Note: In all set ups, loop in and loop out is facilitated by TB2, TB4 and TB6 as
appropriate.

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 2003

06/01

Содержание DB1 P UL

Страница 1: ...as 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 altera...

Страница 2: ...move the 4 off screws holding the cover assembly to the base Keep in a safe accessible location Twist the cover gently clockwise and anti clockwise whilst pulling it away from the unit Remove to gain...

Страница 3: ...RANGEMENT 2 HOLES 5 16 8mm DIA 5 1 2 140mm FIXING CRS 3 1 8 79mm 6 7 8 175mm DIA 3 1 8 79mm 5 1 2 140mm FIXING CRS 6 3 4 171mm DIA 6 5 8 8 1 2 168mm 216mm 4 1 8 6 105mm 152mm 1 3 16 30mm ALL DIMENSION...

Страница 4: ...inuous at 970 Hz 10010 114 15 554Hz for 100mS 440 Hz for 400mS 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 Sw...

Страница 5: ...black tone 1 will sound Reverse the voltage so that TB3 is ve and TB1 is ve tone 2 will sound 3 3 2 Common ve Set Up Connect input wires to TB1 ve and separate ve s to TB3 and TB5 When TB3 is ve tone...

Страница 6: ...specific approval details UL listed for use in Class 1 Division 1 Groups C D USA USL Class 1 Zone 1 Groups IIA IIB UL Standards UL1203 UL464 Suitable for hazardous location fire alarm applications 6...

Страница 7: ...MEDC 2003 06 01...

Страница 8: ...liery Road Pinxton Nottingham NG16 6JF UK Tel 44 0 1773 864100 Fax 44 0 1773 582800 Sales Enq Fax 44 0 1773 582830 Sales Orders Fax 44 0 1773 582832 MEDC Stock No E mail sales medc com Web www medc co...

Отзывы: