E2S GNExB1X05, Инструкция по эксплуатации

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European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH www.e2s.com Tel: +44 (0)208 743 8880
Document No. D155-00-201-IS Issue 3 28-11-22 Sheet 3 of 5
6.2. Access to the Flameproof Enclosure
In order to connect the electrical supply cables to the beacon
it is necessary to remove the flameproof cover to gain access
to the flameproof chamber. To access the Ex d chamber,
loosen the M3 grub screw on the beacon cover. Open the
enclosure by turning the beacon cover counter-clockwise and
remove the cover taking extreme care not to damage the
flameproof threads in the process (see figure 2).
On completion of the installation the flameproof threaded
joints should be inspected to ensure that they are clean and
that they have not been damaged during installation.
Flameproof threaded joints are not intended to be repaired.
Ensure that 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. Tighten the M3 grub screw.
7) Installation Requirements
7.1. Installation Standards Compliance
Attention: Disconnect from power
source before installation or service
to prevent electric shock.
The beacons must only be installed by suitably qualified
personnel in accordance with the latest issues of the relevant
standards:
EN60079-14 / IEC60079-14: Explosive atmospheres -
Electrical installations design, selection and erection.
EN60079-10-1 / IEC60079-10-1: Explosive atmospheres -
Classification of areas. Explosive gas atmospheres.
EN60079-10-2 / IEC60079-10-2: Explosive atmospheres -
Classification of areas. Explosive dust atmospheres.
The installation of the units must also be in accordance with
any local codes that may apply and should only be carried
out by a competent electrical engineer who has the
necessary training.
7.2. Cable Selection and Connections
When selecting the cable size, consideration must be given
to the input current that each unit draws, 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.
Electrical connections are to be made into the terminal blocks
on the PCBA. A five-way terminal block is provided on both
AC and DC beacons. There are two live, two neutral and an
Earth terminal for the input and output wiring on AC units. DC
units have two +ve, two -ve and an S2 terminal for the input
and output wiring.
Wires having a cross sectional area of up to 2.5mm² can be
connected to each terminal way. If an input and output wire is
required the 2-off Live/Neutral or +/- terminals can be used. If
fitting 2-off wires to one terminal way the sum of the 2-off
wires must be a maximum cross sectional area of 2.5mm².
Strip wires to 8mm. When connecting wires to the terminals
great care should be taken to dress the wires so that when
the cover 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.
Earthing
Please note that for AC supply voltage product versions the
Earth terminal on the PCBA does not provide an earth
connection to the product enclosure. The enclosure must be
independently earthed using either the external or internal
earth fixing point, (see fig 3 and notes below).
Both AC and DC beacon units can be connected to an earth.
The units are provided with internal and external earth
terminals which are both located on the terminal chamber
section of the unit (see figures 3 and 4).
M3 x 6mm Grub Screw
Lid Moulding
Figure 2
O-Ring
Supply
Terminals
E
L L
N
AC Unit
Figure 3
N
External Earth Stud Internal Earth Stud
S2 -
- +
+
DC Unit
External Earth Stud Internal Earth Stud Supply Terminals
Figure 4