WIKA PSD-4-ECO, Operating Instructions Manual

Page: 21 / 140

14247391.01 07/2019 EN/DE/FR/ES
21 WIKA operating instructions, model PSD-4-ECO
EN
Delay times (0 ... 65 s)
This makes it possible to filter out unwanted pressure peaks of a short duration or
a high frequency.
The pressure must be present for at least a certain pre-set time for the output to
switch on. The output does not immediately change its status when it reaches the
switching event (SP), but rather only after the pre-set delay time (DS).
If the switching event is no longer present after the delay time, the switch output
does not change.
The output only switches back when the system pressure has fallen down to the
reset point (PR) and stays at or below the reset point (RP) for at least the pre-set
delay time (DR).
If the switching event is no longer present after the delay time, the switch output
does not change.
5.10 Damping function
The time constant “x” specifies the time duration which the digital display, the
switching output or the analogue signal requires to approach the end value with
a deviation of ± 1 % following a change in measured value. After a duration of 2
times “x”, the output value has reached 100 % with a deviation of ± 0.01 % of the
prevailing pressure.
Fig.: Delay times
5.11 Description of the IO-Link functionality (optional)
IO-Link is a point-to-point connection for the communication of the PSD-4-ECO with an IO-Link master.
IO-Link specification: Version 1.1
A detailed description of the IO-Link functionality and the device description file (IODD) can be found online on the
product details page of the pressure switch at www.wika.com.
5. Commissioning, operation
100 %
0
x
Zeit
Time