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European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH [email protected] Tel: +44 (0)208 743 8880
www.e-2-s.com Fax: +44 (0)208 740 4200
Document No. IS 2446-76-P Issue 1 25/02/13 Sheet 3 of 6
Mod No: ACN0012
The current levels shown above are for the 440Hz
Continuous tone @ nominal input voltage. The 24V and 48V
DC units and the 230V and 115V 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.
Beacon Section
The input current to the beacon section will vary according to
the voltage input level. The current levels shown above are
for nominal input voltage. The 12V, 24V and 48V DC units
have a converter circuit and therefore the input current level
will decrease slightly as the input voltage is increased and will
increase slightly as the input voltage is reduced.
9)
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 units 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 units connected to the
line.
SAFETY WARNING: If the unit is used at high ambient
temperatures, i.e. over +40ºC, then the cable entry
temperature may exceed +70ºC and therefore suitable heat
resisting cables must be used, with a rated service
temperature of at least 110ºC.
10)
Earthing
Both AC and DC units must be connected to a good quality
earth. The units are provided with internal and external
earthing terminals, which are both, located on the beacon
section of the unit (see figures 2 and 3).
When using the external earth terminal a cable crimp lug
must be used. The cable lug should be located between the
two M5 stainless steel flat washers. The M5 stainless steel
spring washer must be fixed between the outer flat washer
and the M5 stainless steel nut to ensure that the cable lug is
secured against loosening and twisting.
The internal earth bonding wire ensures that a good quality
earth is maintained between the sounder section casting and
the beacon section casting.
11)
Cable Glands
The BExDCTS110-05D unit has dual cable gland entries
which have an M20 x 1.5 entry thread as standard. Only
cable gland
s approved for Ex ‘d’ applications can be used,
which must be suitable for the type of cable being used and
also meet the requirements of the Ex ‘d’ flameproof
installation standard EN 60079-14:2008 / IEC60079-14:2007.
When only 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.
For combustible dust applications, the cable entry device and
blanking elements shall be in type of explosion protection
increased safety "e" or flameproof enclosure "d" and shall
have an IP 6X rating according to EN60529:1992.
SAFETY WARNING: If the unit is used at high ambient
temperatures, i.e. over +40ºC, then the cable entry
temperature may exceed +70ºC and therefore suitable heat
resisting cable glands must be used, with a rated service
temperature of at least 110ºC.
12)
Cable Connections
The combined sounder / beacon unit BExDCTS110-05D has
separate printed circuit boards in the sounder and beacon
sections. The terminals for the incoming power supply and
telephone signal are on the printed circuit board in the
sounder section and the terminals for the beacon are on the
printed circuit board in the beacon section (see figures 4&5
and 6&7). See section 7 of this manual for access to the
enclosure and the wiring diagrams at the end of this manual.
The incoming cables must be wired to the terminals on
the electronics assembly in the sounder and beacon
section of the unit.
POWER CONNECTIONS TO SOUNDER AND BEACON
SECTION
The power input cable should enter the enclosure via one of
the M20 cable entries and be connected to the following
terminals.
The power input (L) AC units or (+ve) DC units is connected
to the telephone board (L/+) terminal (see figures 8 & 9)
The power input (N) AC units or (-ve) DC units is connected
to the beacon board (N) AC or (-ve) DC units terminal (see
figures 8 & 9)
(L & N) AC units (+ve &
–ve) DC units in the sounder section
of the unit (see figures 6 and 7).
The telephone signal cable should enter the enclosure via the
other M20 entry and be connected to the telephone terminal
in the sounder section of the units (see figures 6,7 and 8,9)
and wiring diagrams on pages four and five.
A single wire with a cross sectional area of up to 4mm² can
be connected to each terminal way. When connecting wires
to the terminals great care should be taken to dress the wire
so that when the beacon section is inserted into the chamber
the wires do not exert excess pressure on the terminal
blocks. This is particularly important when using cables with
large cross sectional areas such as 2.5mm² and above.
Internal Bonding Wire Terminal
Internal Earth Terminal
2 off M20
Cable Entries
Figure 3
