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8.1.6 Electrical connection
EN175301-803 connectors
Area sicura
M12x1 connectors
Area sicura
The transmitter's metal case must always be connected to the earth using the threaded connector for the process, in order to
protect it against fluctuations due to electromagnetic fields and electrostatic charges. If this cannot be done, connect the
transmitter to earth using the connector and the shield on the cable.
8.1.7 Safety instructions
The transmitter must be connected to an Associated piece of Equipment (Diode safety barrier or Galvanic insulator) with an [Ex
ia] or [Ex ib] execution, complying with the maximum voltage (Ui), current (Ii), and power (Pi), and taking into consideration
the internal capacity (Ci) and inductance (Li) values, indicated in the "Nominal Characteristics". If the barrier has an "ib"
protection level, the entire system should be at an "ib" level suitable only for not inflammable fluids.
The transmitters must be installed in compliance with the European Standard CEI EN 60079-14 (current edition) and
maintenance operations must be carried out according to the requirements of the European Standard CEI EN 60079-17 (current
edition); Every Intrinsic Safety transmitter must be included in the Document Describing the System (CEI EN 60079-14 and CEI
EN 60079-25).
8.1.8 Commissioning
Before an electrical safety structure is commissioned within a plant or a system, the user must check that it complies with the
design data and is installed correctly. Check that the Associated Equipment called for in the relevant Document Describing the
System is connected to each transmitter.
Tighten the threaded portion of the transmitter, applying a torque (max 50 Nm) using a suitable spanner on the hexagonal part of
the process connector, without applying force to the casing with your hands or pipe wrench. Remove the connector as shown in
figure 1 and connect the cable as shown in figure 2. Refit the connector, complete with all its gaskets, to guarantee the declared
IP protection level, and fix it to the transmitter.
3
+V in
1
3
2
A out -
Area pericolosa
Field case
+V in
1 2 3 4
A out -
Area pericolosa
Wiring diagrams
NUOVA FIMA - Industrial instrumentation for Pressure and Temperature
User Guide
PRESSURE TRANSMITTER SX SERIES
Cable outlet
+V in
A out -
Area sicura
Area pericolosa
Permanent cable - immersion
+V in
A out -
Area sicura
Area pericolosa
Marrone
Bianco
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