Mounting The Part-Turn Actuator; Using The Positioner In A Humid Environment - Siemens SIPART PS2 Compact Operating Instructions

3.3

Mounting the part-turn actuator

You require an actuator-specific VDI/VDE 3845 mount to install the positioner on a part-turn actuator. You receive the mount
and screws from the actuator manufacturer. Ensure that the mount has a sheet metal thickness of > 4 mm and
reinforcements. You also need the mounting kit 6DR4004-8D or the stainless steel coupling TGX: 16300-1556. Refer to the
detailed operating instructions for further information on mounting.
3.4

Using the positioner in a humid environment

Introduction
This information contains important notes for the installation and operation of the positioner in a wet environment with
frequent and heavy rains and/or continuous tropical dew. The IP66 degree of protection is no longer adequate in this
environment, especially when there is a risk of water freezing.
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 display becomes poorly legible.
Figure 3-1 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 with a plastic hose.
Procedure for installing the plastic hose on the gland
1. Unscrew the sintered bronze attenuator from the exhaust air opening at the bottom side of the enclosure.
2. Screw in the aforementioned gland into the exhaust air opening.
3. Install the aforementioned plastic hose into the gland and check whether it fits firmly.
SIPART PS2 (6DR5...)
A5E03436620-04, 02/2014
9