F 6221 (0625)
320
4 Operating Instructions for F 6221
4.1 Application
The module is used to measure the current of 0/4 to 20 mA transmitters. These transmitters
can be installed in potentially hazardous atmospheres from Zone 1 on.
The digitized process signals are made available at the outputs.
4.2 Electrical specifications concerning intrinsic safety
For these specifications please refer to the EC prototype test certificate enclosed.
4.3 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 7063.
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.
• Two intrinsically safe input circuits of two F 6221 modules or several intrinsically safe
inputs of one F 6221 module as well as one Ex supply unit for the transmitter can be
wired in parallel. The maximum values (U
0,I0,C0,L0) reduced due to this method of con-
nection have to be considered (interconnection according to PTB-ThEx-10). A technical
report on the interconnection of the F 6221 and F 3325 modules with two-wire transmit-
ters is available from HIMA on request.
• The separation between intrinsically safe and not intrinsically safe terminals must be
≥ 50 mm, especially between adjacent modules.
• The separation between adjacent intrinsically safe terminals must be
≥ 6 mm.
• 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.
No external voltage must be applied at the outputs.
Only these applications are permissible, which are described in the
data sheets for F 3325 and F 6221.
Note The module must not be mounted within a potentially explosive area.
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