4
3.2 Zones, gas groups and T rating
The BA448CF-F has been issued with EC Type
Examination
certificate
ITS06ATEX25314/2X
which has been used to confirm compliance with
the requirements for Group II Category 1G Ga Ex
ia IIC T4 (Tamb –40 to 70
o
C) specified in the
ATEX Directive. When connected to a suitable
certified system the BA448CF-F may be installed
in:
Zone 0
explosive gas air mixture
continuously present.
Note: Special conditions for
safe use apply see section 5.1
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
Having a temperature classification of:
T1
450oC
T2
300oC
T3
200oC
T4
135oC
At an ambient temperature between –40 and
+70
o
C.
Note: minimum guaranteed operating temperature
is –20ºC.
3.3 Fieldbus connection
The BA448CF-F 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) defined in EN 60079 Part 27 and have
separate entity parameters shown below:
FISCO Entity
Ui
=
17.5V dc
22.0V dc
Ii
=
380mA dc
250mA dc
Pi
=
5.32W
1.2W
The
maximum
equivalent
capacitance
and
inductance at terminals 1 & 2 is:
Ci
= 0
Li
= 8µH
3.4 Certification Label Information
The certification information label is fitted to the top
outer surface of the enclosure. It shows details of
the ATEX certification and a statement that the
instrument is a FISCO Field Device, plus BEKA
associates name and location. IECEx approval
information is also included. The label may also
contain non-European certification information.
The instrument serial number and year of
manufacture are shown on the rear panel adjacent
to the terminals.
