Or vibrations – Cashco Siemens PS2 I/P User Manual

Page 38

Preparing for Operation

SIPART PS2 Manual

A5E00074631-01

Mount the above mentioned plastic hose on the screw--type gland

and check the good fit.

Fix the plastic hose with a cable strap to the fitting so that the

opening faces downwards.

Make sure that the hose has no kinks and the exhaust air can flow

out unhindered.

3.3.2

Instructions for using positioners which are exposed to great
accelerations or vibrations

Great acceleration forces which may be far beyond the specified data

occur on fittings under great mechanical stress such as breaking flaps,

heavily shaking or vibrating valves as well as “steam impacts”. This

may lead to maladjustment of the slip clutch in extreme cases.
Please use the positioner with reinforced slip clutch for such

applications.
The increased torque requires a much greater force to actuate the slip

clutch.

Applications in which the measures described above are inadequate

are also conceivable. This applies for instance with continuous and

heavy vibration, increased or too low ambient temperatures and in the

case of nuclear radiation.
The separate attachment of position displacement sensor and

controller unit can help here. A universal component is available which

is suitable both for linear and rotary actuators.
You require the following:

The position displacement sensor unit (order no. C73451-

A430-D78). This consists of a SIPART-PS2- housing with integrated

slip clutch, built--in potentiometer and various dummy plugs and

seals.

The controller unit, any positioner version.

The EMC filter plate, this is is a set together with cable clips and

M-20 screw--type cable gland and has the order number

C73451-A430-D23. The EMC filter plate must be installed in the

SIPART-PS2 positioner. The installation instructions enclosed with

the EMC filter plate explain how to assemble the components.

A 3-wire cable for connecting the components.

This retrofit kit should always be used for the controller unit when any

actuator--mounted potentiometer (resistance 10 kohms) is to be used

instead of the position displacement sensor unit C73451-A430-D78.

External

displacement

measurement