BERTHOLD TECHNOLOGIES LB 480, User Manual

Page: 35 / 450

SENSseries LB 480
BERTHOLD TECHNOLOGIES GmbH & Co. KG
1 – 35
Volume 1 5 Explosion Protection
1
5.6.1 Increased Safety "e" in the Terminal Compart-
ment
Housing Cover
• Take the weight (approx. 1.5 kg) of the housing cover into con-
sideration when open and closing it so that it doesn't smash
down.
• Install all four Allen screws (cylinder screws
ISO 4762 M5 x 20 - A4 - 70) for the housing cover with a
torgue of 4 Nm. Use spring washers (DIN 127 - B5 - 1.4310) for
housing covers with flat gaskets. For housing covers with
O-Rings, use Nord-Lock-washers (NL SS).
Screwed fittings
• Use only metallic screwed fittings and M20 x 1.5 screwed fit-
tings suitable for the type of protection, depending on their
application, but at least IP65.
• Only screwed fittings are permitted for ambient temperatures
between -20° C and +40° C that technically meet at least the
standard listed on the cover page of LB 480 EC type-examina-
tion certificate. Only screwed fittings which have been
approved by BERTHOLD TECHNOLOGIES may be used outside
this temperature range.
• Use only cables and fittings approved in accordance with local
installation regulations. This could require special cables to pre-
vent gas migration and, in particular, fittings with compound
filling.
• Use only screwed fittings that are suitable for the type of cable
(reinforced, non-reinforced, ...) and the cable cross-section.
• When using adapters for thread adjustment (e.g. thread reduc-
tion), only one adapter may be used in each cable gland.
• Replace the screwed fittings only by screwed fittings of the
same type.