_______________________________________________________________________________________________________________________________
European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH
Tel: +44 (0)208 743 8880
www.e-2-s.com
Fax: +44 (0)208 740 4200
Document No. D156-00-501-IS
Issue 1
11-12-15
Sheet 3 of 3
12-way
Terminal block
(Labeled 1-12)
External Earth
Stud
Internal Earth
Stud
M20 x 1.5
Entries
M20 x 1.5
Entries
12-off
Standard DIN rails
(Labelled 1-12)
4-off
Bonded Earth
DIN rails
(Labelled 13-16)
External Earth
Stud
Internal Earth
Stud
12)
Cable Connections
Terminal Block Version (GNExJ2T01)
The cable connections are made into the terminal block in the
flameproof enclosure. See section 7 of this manual for access
to the flameproof enclosure.
DIN Rail Version (GNExJ2D01)
The cable connections are made into the DIN Rail in the
flameproof enclosure. See section 7 of this manual for access
to the flameproof enclosure.
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.
Internal earthing connections should be made to the terminal
connections in terminal block or bonded Earth terminals of
DIN rail (see figure 5). The earth conductor should be at least
equal in size and rating to the incoming power conductors.
External earthing connections should be made to the M4
earth stud, using a ring crimp terminal to secure the earth
conductor to the earth stud between the two M4 stainless
steel flat washers, then reassemble the M4 spring washer
and tighten the M4 nut to ensure that the cable lug is secured
against loosening and twisting. The external earth conductor
should be at least 4mm
2
in size.
13)
Maintenance, Overhaul and Repair
Maintenance, repair and overhaul of the equipment should
only be carried out by suitably qualified personnel in
accordance with the current relevant standards:
EN60079-19/IEC60079-19 Explosive
atmospheres
-
Equipment repair, overhaul and reclamation
EN 60079-17/IEC60079-17 Explosive atmospheres -
Electrical installations inspection and maintenance
Units must not be opened while an explosive atmosphere is
present.
If opening the unit during maintenance operations a clean
environment must be maintained and any dust layer removed
prior
to opening the unit.
Electrostatic charging hazard - Clean only with a damp cloth.
14
)
Adapter Options
The GNEx Junctino Box can be supplied with the following
types of adapters:
M20 to ½” NPT
M20 to ¾” NPT
M20 to M25
It is important to note that stopping plugs cannot be fitted
onto adapters, only directly onto the M20 entries.
If the installation is made using conduit, openings must have
a sealing fitting connected as close as practical to the wall of
the enclosure, but in no case more than the size of the
conduit or 50mm, whichever is the lesser.
15)
Special Conditions of safe use
The enclosure is non-conducting and may generate an
ignition-capable level of electrostatic charges under certain
extreme conditions. The user should ensure that the
equipment is not installed in a location where it may be
subjected to external conditions that might cause a build-up
of electrostatic charges on non-conducting surfaces.
Figure 4
Figure 5
