ABLE BEXS110D Скачать руководство пользователя страница 4

shaped mounting bracket (see figure 1). The angle can then
be adjusted in the direction that the sound is primarily
required to cover. This can be achieved by loosening the two
large bracket screws in the side of the unit, which allow
adjustment in steps of 18

°

. On completion of the installation

the two large bracket adjustment screws on the side of the
unit must be fully tightened to ensure that the unit cannot
move in service.

7)

Safety Warning (Electrostatic Hazard)

The acoustic horn section is made of ABS Plastic, therefore
to avoid a possible ELECTROSTACTIC CHARGE the unit
must only be cleaned with a damp cloth.

8)

Access to the Flameproof Enclosure

In order to connect the electrical supply cables to the sounder
it is necessary to remove the flameproof cover to gain access
to the flameproof chamber. To achieve this remove the four
M6 hexagon socket head screws (see figure 2) and withdraw
the flameproof cover taking extreme care not to damage the
flameproof joints in the process.

Note the four

M6 screws are Class A4-80 stainless steel

and only screws of this category can be used on these
sounders.

It is therefore important that these screws and

their spring washers are kept in a safe place during
installation.

On completion of the cable wiring installation the flameproof
joints should be inspected to ensure that they are clean and
that they have not been damaged during installation. Also
check that the earth bonding wire between the two casting
sections is secure and the ‘O’ ring seal is in place. When

replacing the flameproof cover casting

ensure that it is

square with the flameproof chamber casting before inserting.
Carefully push the cover in place allowing time for the air to
be expelled. Only after the cover is fully in place should the
four M6 Stainless Steel A4-80 cover bolts and their spring
washer be inserted and tightened down. If the cover jams
while it is being inserted, carefully remove it and try again.
Never use the cover bolts to force the cover into position.

9)

Power Supply Selection

It is important that a suitable power supply is used to run the
sounders. The power supply selected must have the
necessary capacity to provide the input current to all of the
sounders connected to the system.

The following table shows the input current taken by the
various sounder units:-

Unit Type

Input

Input

Max.

Voltage

Current

I/P Volts

BExS120D

24V DC

800mA

30V

BExS120D

12V DC

850mA

15V

BExS120D

48V DC

420mA

58V

BExS120D

230V AC

90mA

264V

BExS120D

110V AC

200mA

121V

BExS120D

115V AC

180mA

126V

BExS110D

24V DC

265mA

30V

BExS110D

12V DC

195mA

15V

BExS110D

48V DC

130mA

58V

BExS110D

230V AC

56mA

264V

BExS110D

110V AC

93mA

121V

BExS110D

115V AC

110mA

126V

The input current will vary according to the voltage input level
and the frequency of the tone selected. The current levels
shown above are for the 440Hz Continuous tone @ nominal
input voltage. The 24V and 48V DC units and the 230V AC,
115V AC and 110V AC units have a switching voltage
regulator circuit and therefore the input current level will
decrease slightly as the input voltage in increased and will
increase slightly as the input voltage is reduced. The 12V
units do not have a voltage regulator and therefore their input
current will increase when the input voltage is increased.

The above table also shows the maximum voltages at which
the sounders can be operated.

10)

Cable Selection

When selecting the cable size consideration must be given to
the input current that each unit draws (see table above), the
number of sounders on the line and the length of the cable
runs. The cable size selected must have the necessary
capacity to provide the input current to all of the sounders
connected to the line.

SAFETY WARNING: If the high output BExS120D sounders
are used at high ambient temperatures, i.e. over +40ºC, then
the cable entry temperature may 70ºC and therefore
suitable heat resisting cables must be used, with a rated
service temperature of at least 95ºC.

11)

Earthing

Both AC and DC sounder units must be connected to a good
quality earth. The units are provided with internal and

Figure 1

Plastic Acoustic Horn

Please see Safety Warning
in Section 7 of this manual

Flameproof
Chamber

Flameproof
Cover

S/S Mounting
Bracket

Figure 2

4 off M6 Cover Screws

External Earth
Terminal

Содержание BEXS110D

Страница 1: ...Supplied by Call us on 44 0 118 916 9420 Email info 247able com com Installation Maintenance Instructions BEXS110D BEXS120D ...

Страница 2: ...ley Reading Berkshire RG6 4UT UK Tel 44 0 118 9311188 Email info able co uk Aberdeen Office Unit 6 Airside Business Park Kirkhill Industrial Estate Dyce Aberdeen AB21 0GT UK Tel 44 0 1224 725999 Email ab able co uk Internet www able co uk e procurement www 247able com Registered in England No 01851002 VAT No GB 417 2481 61 ...

Страница 3: ...of Enclosure d 4 Installation Requirements The sounders must be installed in accordance with the latest issues of the relevant parts of the BS EN 60079 specifications or the equivalent IEC specifications Selection Installation and maintenance of electrical apparatus for use in potentially explosive atmospheres other than mining applications or explosive processing and manufacture BS EN 60079 14 19...

Страница 4: ...hat a suitable power supply is used to run the sounders The power supply selected must have the necessary capacity to provide the input current to all of the sounders connected to the system The following table shows the input current taken by the various sounder units Unit Type Input Input Max Voltage Current I P Volts BExS120D 24V DC 800mA 30V BExS120D 12V DC 850mA 15V BExS120D 48V DC 420mA 58V ...

Страница 5: ... one cable entry is used the other one must be closed with an Ex d flameproof blanking plug which must be suitably approved for the installation requirements 13 Cable Connections The cable connections are made into the terminal blocks on the electronic pcb assembly located in the flameproof enclosure See section 8 of this manual for access to the flameproof enclosure On the AC units a two way term...

Страница 6: ... or an end of line monitoring resistor can be connected across the ve and ve terminals If an end of line resistor is used it must have a minimum resistance value of 3k3 ohms and a minimum wattage of 0 5 watts or a minimum resistance value of 500 ohms and a min wattage of 2 watts TONE SELECTION TABLE Tone Selection DIP Switch Settings Stage Selection Stage 1 Frequency Description 1 2 3 4 5 Stage 2 ...

Отзывы: