Security Information; Atex / Iecex; Use In Class I And Class Ii Hazardous Locations; Atex/Iecex-Certified Motor Overload Protection - Siemens SIRIUS 3RW55 Equipment Manual

Safety information

2.6 ATEX / IECEx

2.5

Security information

Siemens provides products and solutions with industrial security functions that support the
secure operation of plants, systems, machines and networks.
In order to protect plants, systems, machines and networks against cyber threats, it is necessary
to implement – and continuously maintain – a holistic, state-of-the-art industrial security
concept. Siemens' products and solutions constitute one element of such a concept.
Customers are responsible for preventing unauthorized access to their plants, systems,
machines and networks. Such systems, machines and components should only be connected to
an enterprise network or the internet if and to the extent such a connection is necessary and only
when appropriate security measures (e.g. firewalls and/or network segmentation) are in place.
For additional information on industrial security measures that may be implemented, please
visit
https://www.siemens.com/industrialsecurity.
Siemens' products and solutions undergo continuous development to make them more secure.
Siemens strongly recommends that product updates are applied as soon as they are available
and that the latest product versions are used. Use of product versions that are no longer
supported, and failure to apply the latest updates may increase customer's exposure to cyber
threats.
To stay informed about product updates, subscribe to the Siemens Industrial Security RSS Feed
under
https://www.siemens.com/cert.
2.6 ATEX / IECEx
2.6.1

Use in Class I and Class II Hazardous Locations

The components of the 3RW55 and 3RW55 Failsafe soft starters are not suitable for installation
in Class I and Class II Hazardous Locations .
Use the device only in a control cabinet with at least degree of protection IP 4x.
If you have any questions, ask your ATEX/IECEx expert.
2.6.2

ATEX/IECEx-certified motor overload protection

Environmental conditions
Comply with the ambient conditions for which the 3RW55 and 3RW55 Failsafe soft starters are
approved.
Note that the 3RW55 and 3RW55 Failsafe soft starters are approved for operation in a
temperature range of -25 °C to +60 °C. Consider the derating of the rated operational current at
ambient temperatures higher than 40 °C. You will find further information on derating in the
16
SIRIUS 3RW55 and 3RW55 Failsafe Soft Starters
Equipment Manual, 02/2022, A5E35630887002A/RS-AF/006