Siemens Simatic S5 Handbuch Seite 3

Warning
Risks involved in the
use of so-called
SlMATIC-cornpatible modules of non-
Siemens manuf acture
"The manufacturer of a product (SIMATIC in this case) is under the general obligation to give
waming of possible risks attached to his product. This obiigation has been extended in recent
court rulings to include parts supplied by other vendors. Accordingly, the manufacturer is
obliged to obsewe 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 SlMATlC
products
not t o install socalled SIMATICcompatible modules of other manufacture
in
the form
of repiacement or a d d o n modules
in SlMATlC
Systems.
Our products undergo a strict quality assurance procedure. We have no knowledge as to
whether outside rnanufacturers of so-catled SIMATE-compatible rnodules have any quality
assurance at all or one that
is
nearty equivalent to ours. These so-called SIMATIC- compatible
modules are not marketed in agreement
with
Siemens;
w e
have never recommended the use
of so-called SIMATIC-compatible modules of other rnanufacture. The adveriising of these
other manufacturers for so-called SIMATIC-compatible modutes wrongly creates the
impression that the subject advertised in periodicals, catalogues or at exhibitions had been
agreed with us. Where socalled SIMATIC-compatible modules of non-Siemens manufacture
are combined with our SlMATlC automation systems. we have a case of our product being
used contrary to recommendations. Because of the variety of applications of our SlMATlC
automation systems and the large number of these products rnarketed worldwide, we cannot
give a concrete description specifically anaiyzing the hazards created by these so-called
SIMATIC-compatible modules. It is beyond the manufacturer's capabilities to have all these
so-called SlMATlCcompatible modules checked for their effect on our SIMATIC products. If
the use of so-called SIMATIC-compatible modules leads to defects in a SlMATlC autornation
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 ttmely action in warning Users of the potential
hazards involved in so-called SIMATIC-compatible moduies."