Siemens S5-135U/155U - Manual (Page 17)

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System Manual
C79000-G8576-C199-06
Safety Notes
Risks Involved in the Use of So-Called SIMATIC-Compatible Modules of
Non-Siemens Manufacture
“The manufacturer of a product (SIMATIC in this case) is under the general
obligation to give warning of possible risks attached to his product. This
obligation has been extended in recent court rulings to include parts supplied
by other vendors. Accordingly, the manufacturer is obliged to observe and
recognize such hazards as may arise when a product is combined with
products of other manufacture.
For this reason, we feel obliged to warn our customers who use SIMATIC
products not to install so-called SIMATIC-compatible modules of other
manufacture in the form of replacement or add-on modules in SIMATIC
systems.
Our products undergo a strict quality assurance procedure. We have no
knowledge as to whether outside manufacturers of so-called
SIMATIC-compatible modules have any quality assurance at all or one that is
nearly equivalent to ours. These so-called SIMATIC-compatible modules are
not marketed in agreement with Siemens; we have never recommended the
use of so-called SIMATIC-compatible modules of other manufacture. The
advertising of these other manufacturers for so-called SIMATIC-compatible
modules wrongly creates the impression that the subject advertised in
periodicals, catalogs, or at exhibitions had been agreed with us. Where
so-called SIMATIC-compatible modules of non-Siemens manufacture are
combined with our SIMATIC automation systems, we have a case of our
product being used contrary to recommendations. Because of the variety of
applications of our SIMATIC automation systems and the large number of
these products marketed worldwide, we cannot give a concrete description
specifically analyzing the hazards created by these so-called
SIMATIC-compatible modules. It is beyond the manufacturer’s capabilities
to have all these so-called SIMATIC-compatible modules checked for their
effect on our SIMATIC products. If the use of so-called SIMATIC-compatible
modules leads to defects in a SIMATIC automation system, no warranty for
such systems will be given by Siemens.
In the event of product liability damages due to the use of so-called
SIMATIC-compatible modules, Siemens are not liable since we took timely
action in warning users of the potential hazards involved in so-called
SIMATIC-compatible modules.”
Notes on Using this Manual and on the CE Symbol