_______________________________________________________________________________________________________________________________
European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH [email protected] Tel: +44 (0)208 743 8880
www.e2s.com Fax: +44 (0)208 740 4200
Document No. D211-00-471-IS-SC Issue A 27-11-19 Sheet 3 of 8
4) Location and Mounting
The location of the beacon should be made with due regard
to the area over which the warning signal must be visible. It
should only be fixed to services that can carry the weight of
the unit.
The D2xB1LD3 beacon should be secured to any flat surface
using the two 7mm fixing holes in the feet of the base. The 2-
off mounting feet supplied with the unit must first be fitted to
the base using the 2-off M5 X 8mm countersunk screws
provided. Additional feet are available as spare parts if
required. The unit can also be pole mounted
using the ¾”
NPT Entry in the centre of the base. See Fig. 1.
116,0mm [4,52in.]
116,0mm [4,
5
2
in
.]
168,0mm [6,55in.]
130,1mm [5,07in.]
132,4mm [5,
1
7
in
.]
Ø6,92mm [Ø0,270in.]
3/4" NPT
(For pole mount)
M5 X 8mm
Countersunk screw,
customer to fix
Fig. 1 Fixing Locations
5) Access to the Enclosure
To access the enclosure, loosen the four M4 posi pan head
screws and withdraw the cover.
Fig. 2 Accessing the Enclosure.
To replace cover, c
heck that the ‘O’ ring seal is in place.
Carefully push the cover in place. Insert M4 screws with fibre
washers and tighten to 3Nm torque.
6) Selection of Cable, Cable Glands, Blanking
Elements & Adapters
When selecting the cable size, consideration must be given
to the input current that each unit draws (see Table 4), the
number of beacons 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.
When selecting the cable size consideration must be given to
the voltage drop over the length of the cable run to ensure
the min. input voltage at the point of use (voltage range, see
section 13)
The voltage drop depends on:
-
The total current draw of the devices installed on
this cable run
-
The wire size and total length of the cable run,
determining the total resistance of this cable run
-
The minimum output voltage supplied by the power
supply
The voltage drop and input voltage at the point of use can be
calculated as follows:
Total Wire resistance =
Wire resistance / 1000ft x length of cable run x 2
(length of cable run needs to be multiplied by two to account
for two wires going to and from the unit)
Total current draw =
Current draw per unit x number of units
Voltage Drop = Total current draw x Total wire resistance
Minimum output of power supply =
Min. voltage at point of use + voltage drop
The entries are as follows:
2-off M20 x 1.5 thread, 2-
off ½” NPT thread & 1-off ¾” NPT
thread
If a high IP (Ingress Protection) rating is required then a
suitable sealing washer must be fitted under the cable glands
or blanking plugs.
For use in explosive dust atmospheres, a minimum ingress
protection rating of IP6X must be maintained.
For use in explosive gas atmospheres, a minimum ingress
protection rating of IP54 must be maintained.
NPT plugs should be greased before insertion.
M4 Cover
Screw (4-off)
(Appropriate cable
entry devices to be
customer supplied)
Cover
Warning
– High voltage may be present,
risk of electric shock. DO NOT open when
energised, disconnect power before
opening.
Warning
–
Hot surfaces. External surfaces
and internal components may be hot after
operation, take care when handling the
equipment.
