BEKA PROFIBUS PA BA444DF-P, Manual

Page: 4 / 26

3.2 Ex ia Zones, gas groups and T rating
The BA444DF-P has Group II Category 1G Ex ia
IIC T4 Ga Ta = –40 to 70
o
C FISCO and entity
parameter approval. When connected to a
suitable certified system the BA444DF-P may be
installed in:
Zone 0 explosive gas air mixture
continuously present.
Zone 1 explosive gas air mixture
likely to occur in normal
operation.
Zone 2 explosive gas air mixture not
likely to occur, and if it does will
only exist for a short time.
Be used with gases in groups:
Group A propane
Group B ethylene
Group C hydrogen
In gases which may be used with equipment
having a temperature classification of:
T1 450oC
T2 300oC
T3 200oC
T4 135oC
At an ambient temperature between –40 and
+70
o
C.
3.3 Ex ic Zones, gas groups and T rating
The BA444DF-P also has Group II Category 3G
Ex ic IIC Gc T4 Ta = –40 to 70
o
C entity parameter
approval with a higher Ui input voltage than the
Ex ia approval. When connected to a suitable
certified system the BA444DF-P may be installed
in:
Zone 2 explosive gas air mixture not
likely to occur, and if it does will
only exist for a short time.
Be used with gases in groups:
Group A propane
Group B ethylene
Group C hydrogen
In gases which may be used with equipment
having a temperature classification of:
T1 450oC
T2 300oC
T3 200oC
T4 135oC
At an ambient temperature between –40 and
+70
o
C.
Note : the guaranteed operating temperature range
of the BA444DF-P Fieldbus Indicator is –20 to
+70
o
C
Ex ia and Ex ic entity certification plus FISCO
certifiation allows the BA444DF-P to be installed in
all Zones and to be used with most common
industrial gases.
3.4 Fieldbus connection
The BA444DF-P Indicator is powered and
communicates via the fieldbus which is connected
to terminals 1 and 2. These are non-polarised,
comply with the Fieldbus Intrinsically Safe Concept
(FISCO) and have separate Ex ia and Ex ic entity
input parameters as shown below:
FISCO Ex ia entity Ex ic entity
Ui = 17.5V 22.0V 32V
Ii = 380mA 250mA 125mA
Pi = 5.32W 1.2W 1W
3.5 Certification Label Information
The certification information label is fitted in a
recess on the top outer surface of the enclosure. It
shows details of the ATEX certification, a statement
that the instrument is a FISCO Field Device, plus
BEKA associates name and location. IECEx
approval information is also included. The label for
some versions of the instrument will also contain
non-European certification information.
The instrument serial number and year of
manufacture are recorded on a separate label
inside the terminal compartment.
The label includes boxed areas which should be
marked by the installer to show which of the three
certifications is being used.
4