Festo SDE1 Series, Operating Instructions Manual

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SDE1−...
Festo SDE1−... 0511e English
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3 Function and application
The SDE1−... is intended for the monitoring of pressure alterations in pressure line
systems or terminals and for converting pneumatic pressure values into electrical
signals which can be used for control or regulatory functions. Measurements are
carried out using a piezoresistive sensor element with a following electronic evalu
ation unit. The measurement result is shown numerically on the display. Interfac
ing to higher−level systems is provided by one or two switching outputs or analog
outputs, depending on type.
The product versions P2, 2I and N2 (see Fig.2) provide two switching outputs
(OutA/Out B). Other product versions have only one switching output (Out A). The
switching outputs can be configured as NC and NO contacts. The desired switching
points can be defined as threshold comparator or window comparator. The product
versions FQ4, HQ4 and WQ4 (see Fig.2) provide two pneumatic ports for differen
tial pressure measurement (measuring pressure p1 reference pressure p2). If
there is no tube connection for p2, the reference pressure is the ambient pressure
(relative pressure measurement). The product versions PU, PI, NU, NI (see Fig.2)
have an analog output which transfers the measured value as an electrical signal
proportional to pressure.
4 Conditions of use
Warning
Depending on the functions of the machine/system, the manipulation of signal
states can cause serious injury to human beings and damage to property.
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Note that if the switching behaviour of the switching outputs is modified in
the EDIT mode, the new status will be effective immediately.
Activate the password protection (security code) in order to prevent uninten
tional modification by unauthorised third parties (see section 6 under EDIT
mode).
Please note
Incorrect handling can result in malfunctions.
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Make sure that the following specifications are always observed.