cause a built-up of electrostatic charges on non-conducting
surfaces.
The equipment has not been assessed as a safety-related
device (as referred to by Directive 94/9/EC Annex II, clause
1.5).
To maintain the ingress protection rating and mode of
protection, the cable entries must be fitted with suitably rated
ATEX / IECEx certified cable glands and/or suitably rated
ATEX / IECEx certified blanking devices during installation
according to EN / IEC60079-14. If a high IP (Ingress
Protection) rating is required then a suitable sealing washer
must be fitted under the cable gland.
For use in explosive gas atmospheres, a minimum ingress
protection rating of IP54 must be maintained. For use in
explosive dust atmospheres, a minimum ingress protection
rating of IP64 must be maintained.
The enclosure is accessed by removing the 4 M4 Hex cover
bolts fastening the enclosure. Do not open other joints of the
enclosure for installation, service and maintenance.
Connections are to be made into the terminal blocks using
solid wire, sizes 0.5-4mm
2
or stranded wire, sizes 0.5-2.5 mm
2
.
Wire insulation needs to be stripped 8mm. Stranded wires may
be fitted securely with crimped ferrules. Terminal screws need
to be tightened down with a tightening torque of 0.45 Nm.
Earthing connections should be made to the Internal Earth
terminal on the PCBA. The internal earth bonding wire
connects the PCBA earth terminal to the internal earth terminal
in the enclosure.
Check that the earth bonding wire between the two enclosure
parts is secure and the ‘O’ ring seal is in place before closing.
4.2 Maintenance, Repair and Overhaul
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
__________________________________________________________________________________________________________________
European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH [email protected] Tel: +44 (0)20 8743 8880
www.e2s.com Fax: +44 (0)20 8740 4200
Document No. IS4231-ATEX Issue: A 19-03-15 Sheet 2 of 2