Cable Connections - E2S D1xB2X05-S Instruction Manual

6) Access to the Enclosure
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.
In order to connect the electrical supply cables to the beacon,
it is necessary to open the explosion proof enclosure. Loosen
the locking grub screw in the cover and then remove the
glass dome cover assembly to gain access to the chamber.
This can be achieved by unscrewing the glass dome cover,
taking extreme care not to damage the threads when doing
so.
M20 Entry
3/4" NPT
Conduit
Entry
Figure 3: Accessing the Explosion Proof Enclosure.
On completion of the installation the flameproof threads should
be inspected to ensure that they are clean and that they have
not been damaged during installation. Ensure the O-ring seal
is in place and undamaged.
When fitting the flameproof cover ensure the thread is
engaged correctly. Fully tighten the cover all the way, ensure
no gap is visible between the cover and base of the beacon
enclosure.
7) 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 section 11), 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 beacons connected to the
line.
The entries are 2-off M20 x 1.5 thread & 3-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.
Impress House, Mansell Road, Acton, London W3 7QH
E2S Warning Signals
Document No. D191-00-621-IS
Glass dome
cover
3/4" NPT
Entry
Issue 1 27-10-22
For high ambient temperatures the cable entry temperature
or the cable branching point temperature may exceed 60ºC
and therefore suitable heat resisting cables and cable glands
must be used, with a rated service temperature of at least the
values stated below:
Table 2: Min. Ratings of Cables & Cable Glands.

8) Cable Connections

The units have 2-off M20 x 1.5 threaded entries and 3-off ¾"
NPT x 14 threaded entries.
Electrical Connections are to be made into the terminal blocks
using solid or stranded wire, sizes 0.5-2.5mm2 / AWG 20-14.
Wire insulation needs to be stripped 6-7mm. Wires may be
fitted securely with crimped ferrules. Terminal screws need to
be tightened down with a tightening torque of 0.4 Nm / 3.5 Lb-
in.
See section 6 of this manual for access to the enclosure.
9) Wiring
A 4-way terminal block is provided on the DC beacons for
power. There are 2-off +ve, 2-off –ve terminal and an internal
Earth boss.
See schematic diagram D191-06-621.
Terminals
- - + +
Figure 4: D1xB2XDC Terminals.
9.1 Line Monitoring
On the D1xB2X unit, DC reverse line monitoring can be used
if required.
All DC beacons have a blocking diode fitted in their supply
input lines. An end of line monitoring resistor can be connected
across the +ve and –ve terminals in the explosion proof
enclosure. If an end of line resistor is used it must have the
following values:
Minimum resistance 3K3 Ohms
Minimum resistance 470 Ohms
www.e2s.com
Minimum Power 0.5W
Minimum Power 2.0W
Tel: +44 (0)208 743 8880
Sheet 5 of 15