Siemens SIPART PS2 PA 6DR55 Series, Руководство по эксплуатации

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Installation
4.4 Using the positioner in a humid environment
SIPART PS2 with PROFIBUS communication
Operating Instructions, 09/2007, A5E00127926-07
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Favorable and unfavorable mounting positions
Avoid the unfavorable mounting positions:
●
To prevent fluids seeping through during normal operation of the device, e.g. through
exhaust air openings.
● Otherwise the digital display becomes poorly legible.
Figure 4-3 Favorable and unfavorable mounting positions
Additional measures to prevent liquids from seeping through
Take additional measures to prevent liquids from seeping through if the conditions force you
to operate the positioner in an unfavorable mounting position.
Additional measures required to prevent liquids from seeping through depend on the
selected mounting position. You may also require:
●
Gland with sealing ring, e.g. FESTO: CK - 1 / 4-PK-6
● Approximately 20 to 30 cm plastic hose, e.g. FESTO: PUN - 8 x 1.25 SW
● Cable tie; the number and the length depend on the local conditions.
Procedure
1. Install the casing such that rain water or condensate running along the pipes can be
drained before the terminal strip of the positioner.
2. Check the seals of electrical connections for perfect fitting.
3. Check the seal in the enclosure cover for damage and contaminations. Clean and/or
replace if required.
4. Install the positioner such that the sintered bronze attenuator at the bottom side of the
enclosure points downwards in the vertical mounting position. If this is not possible,
replace the attenuator with a suitable gland having a plastic hose.