APPENDIX 1
ATEX dust
certification
A1.0 ATEX dust certification
In addition to ATEX certification permitting
installation in explosive gas atmospheres which is
described in the main section of this instruction
manual, the BA414DF-F is available with optional
ATEX Ex ia IIIC and Ex ic IIIC dust certification. If
ATEX dust certification is required it must be
requested when the BA414DF-F Fieldbus Indicator
is purchased.
CAUTION
Before installing a BA414DF-F Fieldbus
Indicator
in
the
presence
of
a
combustible
dust,
ensure
that
the
certification information label, which is
located on the top of the instrument,
specifies dust certification - see section
A1.3
A1.1
Ex ia IIIC entity systems
The BA414DF-F Fieldbus Indicator has Ex ia IIIC
T100ºC Da IP66 certification. Installations should
comply with EN 60079-14
Electrical installation
design, selection and erection.
The Fieldbus Indicator may be installed in:
Zone 20 explosive atmosphere in the
form of a cloud of
combustible dust in air is
continuously present, or for
long periods or frequently.
Zone 21 explosive atmosphere in the
form of a cloud of
combustible dust in air is
likely to occur occasionally
in normal operation.
Zone 22 explosive atmosphere in the
form of a cloud of
combustible dust in air is not
likely to occur in normal
operation, but if it does
occur, will only persist for a
short period.
Be used with dusts having a Minimum Ignition
Temperature of:
Dust cloud
150
o
C
Dust layer on BA414DF-F 175
o
C
up to 5mm thick
Dust layer on BA414DF-F Refer to
over 5mm thick.
EN 60079:14
At an ambient temperature between -20 and +60
o
C
The Indicator may be connected to any intrinsically
safe segment providing:
The device powering the fieldbus segment is
ATEX Ex ia IIIC certified for Zone 20, 21 or
22 applications, or Ex ib IIIC certified for
application in Zone 21 or 22. The output
parameters should be equal to or less than:
Uo
=
22V dc
Io
=
250mA dc
Po
=
1.2W
The segment can provide an additional 13mA
to power the Fieldbus Indicator.
The equivalent capacitance Ci of the
BA414DF-F Fieldbus Indicator is zero and
the equivalent inductance is insignificant.
Therefore these BA414DF-F parameters do
not need to be considered.
A1.2
Ex ic IIIC entity systems
The BA414DF-F Fieldbus Indicator also has
Ex ic IIIC certification for applications in Zone 22.
The higher Ui voltage allows the indicator to be
used with Power-i and intrinsically safe segment
couplers powered from Ex e fieldbus trunks.
The Fieldbus Indicator may be installed in:
Zone 22 explosive atmosphere in the
form of a cloud of
combustible dust in air is not
likely to occur in normal
operation, but if it does
occur, will only persist for a
short period.
Be used with dusts having a Minimum Ignition
Temperature of:
Dust cloud
150
o
C
Dust layer on BA414DF-F 175
o
C
up to 5mm thick
Dust layer on BA414DF-F Refer to
over 5mm thick.
EN 60079:14
At an ambient temperature between -20 and +60
o
C
The BA414DF-F Fieldbus Indicator may be
connected to any intrinsically safe segment
providing:
The device powering the fieldbus segment is
ATEX Ex ia IIIC, ib IIIC or ic IIIC certified and
has output parameters equal to or less than:
Uo
=
32V dc
Io
=
125mA dc
Po
=
1W
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