F 3335 (0622)
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2 Operating Instructions for F 3335
2.1 Application
The module can be used to control Ex valves and Ex measuring transmitters (0/4 to 20 mA).
These valves or transmitters can be installed in potentially explosive atmospheres from Zone
1 on.
2.2 Electrical specifications concerning intrinsic safety
For these specifications please refer to the EC prototype test certificate enclosed.
2.3 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 7035.
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 output circuits of one or two modules of the F 3335 type can be wired in parallel.
The reduced maximum values have to be complied with (see EC prototype test certifi-
cate).
• 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.
• Modules, which were operated in general electrical system, may not be used thereafter
no more in Ex-plants.
The lines used must comply with the following insulation test voltages:
• Intrinsically safe lines
≥ 1000 VAC
• Not intrinsically safe lines
≥ 1500 VAC
No external voltage may be applied at the outputs.
Only these applications are permissible, which are described in the
data sheet for F 3335.
Note The module may not be mounted within a potentially explosive atmo-
sphere!
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