Siemens PROFIBUS PA SIPART PS2 Manual page 45

Figure 3-5 Favorable and unfavorable installation positions
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Procedure
SIPART PS2 PA Manual
A5E00127926-03
If conditions oblige you to operate the positioner in a unfavorable
installation position, you can take additional precautionary measures to
prevent penetration by water.
NOTE
Never clean the positioner with a high pressure water jet because the
IP65 degree of protection is inadequate protection for this.
The necessary additional measures to prevent penetration by water de-
pend on the installation position chosen and you may additionally require:
screw-type gland with sealing ring (e.g. FESTO: CK –1 / 4–PK–6)
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plastic hose approx. 20 to 30 cm (e.g. FESTO PUN-- 8X1,25 SW)
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cable straps (number and length depends on local conditions)
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Connect the pipes in such a way that rain water which runs along the
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pipes can drip off before it reaches the terminal strip of the positioner.
Check the electrical connections for perfect firm contact.
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Check the seal in the housing cover for damage and contamination.
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Clean and replace if necessary.
Mount the positioner if possible so that the sinter bronze silencer faces
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downwards on the underside of the housing (vertical installation posi-
tion). If this is not possible, the silencer should be replaced by a suitable
screw-type gland with a plastic hose.
Preparing for Operation
43