F3325 (0622)
220
1 Operating Instructions
1.1 Application
The module can be used to supply Ex measuring transmitters (0/4 to 20 mA). These transmit-
ters can be installed in potentially explosive atmospheres from zone 1 on.
The cable shield for Ex applications has to be put to potential equalization. In non Ex applica-
tions the cable shield is connected to PE bar on the subrack.
1.2 Electrical specifications concerning intrinsic safety
For these specifications please refer to the EC Type Examination Certificate enclosed.
1.3 Assembly and installation
The module is mounted in a 19” subrack. It must be plugged in vertically. The design of the
subrack must allow heat dissipation.
Further information for assembly and installation see HIMA main catalog "The H41q and H51q
System Families".
The module is connected to the intrinsically safe field circuits via the cable plug Z 7025.
In addition, the following points should be considered:
• The electronic module including its connections has to be installed in a way that at least
the degree of protection IP 20 according to EN 60529: 1991 + A1: 2000 is achieved.
• The separation between intrinsically safe and not intrinsically safe terminals must be
≥ 50 mm (filament dimension), especially between adjacent modules.
• The separation between adjacent intrinsically safe terminals must be
≥ 6 mm (filament
dimension).
• Intrinsically safe and not intrinsically safe lines must be installed separately, or the
intrinsically safe lines must be provided with additional insulation.
• Intrinsically safe lines must be identifiable, e.g. by the light blue color (RAL 5015) of the
insulation.
• The wiring has to be secured mechanically in a way which ensures that in the event of
an accidental disconnection, the distance (EN 50 020/ Part 7, Table 4) between the
intrinsically safe and not intrinsically safe connections does not fall below the required
minimum. (e.g. by bundling).
• The line shield has to be connected to equipotential bonding.
• Modules, which were operated in general electrical system, may not be used thereafter
no more in Ex-plants.
No external voltage must be applied at the inputs.
Only these applications are permissible, which are described in the
data sheets for F 3325 and F 6221.
Note The module may not be mounted within a potentially explosive area.
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