Saia PCD2.H310, Руководство пользователя

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Contents PCD2.H31x
Page 6
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SAIA-Burgess Electronics Ltd.
(2H3-00-E.DOC)
26/762 E2
Reliability and safety of electronic controllers
SAIA-Burgess Electronics Ltd. is a company which devotes the greatest
care to the design, development and manufacture of its products:
•
state-of-the-art technology
•
compliance with standards
•
ISO 9001 certification
•
international approvals: e.g. Germanischer Lloyd, UL,
Det Norske Veritas, CE mark ...
•
choice of high-quality componentry
•
quality control checks at various stages of production
•
in-circuit tests
•
run-in (burn-in at 85°C for 48h)
Despite every care, the excellent quality which results from this does
have its limits. It is therefore necessary, for example, to reckon with the
natural failure of components. For this reason SAIA-Burgess Electronics
Ltd. provides a guarantee according to the "General terms and conditions
of supply".
The plant engineer must in turn also contribute his share to the reliable
operation of an installation. He is therefore responsible for ensuring that
controller use conforms to the technical data and that no excessive stres-
ses are placed on it, e.g. with regard to temperature ranges, overvoltages
and noise fields or mechanical stresses.
In addition, the plant engineer is also responsible for ensuring that a
faulty product in no case leads to personal injury or even death, nor to
the damage or destruction of property. The relevant safety regulations
should always be observed. Dangerous faults must be recognized by ad-
ditional measures and any consequences prevented. For example, outputs
which are important for safety should lead back to inputs and be monito-
red from software. Consistent use should be made of the diagnostic ele-
ments of the PCD, such as the watchdog, exception organization blocks
(XOB) and test or diagnostic instructions.
If all these points are taken into consideration, the SAIA
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PCD will pro-
vide you with a modern, safe programmable controller to control, regu-
late and monitor your installation with reliability for many years.