BEKA BA304E, Руководство пользователя

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5. INSTALLATION
5.1 Location
The BA304E and BA324E indicators are housed in
robust IP66 glass reinforced polyester (GRP)
enclosures incorporating an armoured glass
window and stainless steel fittings making them
suitable for exterior mounting in most industrial
installations, including off-shore and waste water
treatment. The indicators should be positioned
where the display is not in continuous direct
sunlight.
Both indicators are surface mounting, but may be
pipe mounted using one of the accessory kits
described in section 9.5 of this manual.
The field terminals and the two mounting holes are
located in a separate compartment with a sealed
cover allowing the instrument to be installed
without exposing the display assembly.
Terminals 2 and 4 are internally joined and may be
used for linking the return 4/20mA wire - see Fig 2.
Similarly terminals 5 and 6 are internally joined and
may be used for linking cable screens. The
indicator’s earth terminal is connected to the
carbon loaded GRP enclosure. If this enclosure is
not bolted to an earthed post or structure, the earth
terminal should be connected to the plant potential
equalising conductor.
The enclosures are fitted with a bonding plate to
ensure electrical continuity between the three
conduit / cable entries.
5.2 Installation Procedure
Fig 4 illustrates the instrument installation
procedure.
a. Remove the instrument terminal cover by
unscrewing the two captive 'A' screws.
b. Mount the instrument on a flat surface and
secure with screws or bolts through the two
'B' holes. Alternatively use one of the pipe or
stem mounting kits described in section 9.5.
c. Remove the temporary hole plug and install
an appropriate IP rated cable gland or
conduit fitting. If more than one entry is
required, one or both of the IP66 stopping
plugs may be replaced with an appropriate IP
rated cable gland or conduit fitting.
d. Connect the field wiring to the terminals as
shown in Fig 5.
e. Replace the instrument terminal cover and
evenly tighten the two 'A' screws.
Fig 4 BA304E & BA324E installation procedure
Fig 5 Dimensions and terminal connections
5.3 EMC
Both instruments compy with the requirements of
the European EMC Directive 2014/30/EU. For
specified immunity all wiring should be in screened
twisted pairs, with the screens earthed in the safe
area.