in the event of malfunctions, the
responsible Festo employee is also
notified. He can then prepare possible
solutions even before he is contacted by
the control centre of the municipality.
Early detection of malfunctions
The heart of the pneumatic complete
solution is an electrical terminal type CPX
combined with an ISO valve terminal
type VTSA. The high-performance system
resolves control problems directly on
site and supports comprehensive remote
diagnostics. Modules for temperature
measurement, pressure regulators or even
pressure sensors can be added on, and the
signals can be processed via the CPX
terminal. A data logger also continuously
documents the charge status of the
accumulators as well as recording the
charging behaviour. The compressed
air production times are also monitored
and the data is transmitted to the
wastewater control centre. Leaks,
problems with the power supply and
Energy self-sufficient automation:
Solar panels
on the roof of the pilot installation supply
power to the control system of the stormwater
retention tanks.
Monitored system:
The electrical terminal
CPX-VTSA is linked to the wastewater control
centre and the responsible employee at Festo
via GSM modem.
Sturdy, corrosion-resistant and suitable for
the ATEX zone:
Pneumatic linear actuators DLP
ensure reliable actuation of the exhaust flow
control valves even at sub-zero temperatures.
other issues can thus be detected and
rectified at an early stage.
The exhaust flow control valves, which
used to be actuated electrically with a
spindle rod, are now moved by pneumatic
linear actuators type DLP. They are ideally
suited to outdoor use. Robust and
corrosion resistant, the DLP are perfect
for use with water technology and can
also be used in an ATEX zone. With
working pressures of between 5 and 7
bar, which can be increased briefly if
required, they can release gate valves
even if they are stuck. This makes the
everyday work of the maintenance staff
much easier.
Ready for the rain
Following completion of the test phase,
the energy self sufficient complete
solution from Festo will be implemented
in other stormwater retention tanks. The
advantages are obvious: greater reliability
and reduced effort thanks to reliable
technology, self sufficient power supply
as well as central control and monitoring.
The excellent infrastructure of the
municipality is now well equipped even
for unexpectedly heavy rainfall.
Issue 24
trends in automation
Synergies
34
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35