BEKA BA444NDF-P, Инструкция по установке и обслуживанию

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3.2 Zones, gas groups and T rating
The BA444NDF-P has been issued with Type
Examination Certificate ITS06ATEX45315
confirming that it complies with the requirements
for Group II Category 3G Ex nL IIC T4 (Tamb –20
to +60°C) specified in the ATEX Directive. When
connected to a suitable certified system the
BA444NDF-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
Having a temperature classification of:
T1 45°C
T2 300°C
T3 200°C
T4 135°C
At an ambient temperature between –20 and
+60
°
C.
This allows the BA444NDF-P to be used with most
common industrial gases.
3.3 Fieldbus connection
The BA444NDF-P Indicator is powered and
communicates via the fieldbus, which is connected
to terminals 1 and 2. These terminals are non-
polarised, comply with the Fieldbus Non-Incendive
Concept (FNICO) defined in EN 60079-27 and also
have the entity parameters shown below:
FNICO Entity
Ui = 17.5V dc 36V 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 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 FNICO Field
Device, plus BEKA associates name and location.
IECEx approval information is also included.
The instrument serial number and year of
manufacture are recorded on a separate label
inside the terminal compartment.