Siemens SIMATIC S7-300 Produktinformation Seite 3

SIMATIC
S7-300
Product information for the S7-300 CPU 31xC and CPU 31x
operating instructions: Installation (A5E00105491-12)
03/2011
Product Information
Introduction
This product information describes additions to the S7-300 CPU 31xC and CPU 31x operating instructions: Installation, Edition
03/2011 (A5E00105491-12) on the
Cybersecurity information
Siemens provides products and solutions with industrial cybersecurity 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 cybersecurity 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 more information on protective industrial cybersecurity measures for implementation, please
(
https://www.siemens.com/global/en/products/automation/topic-areas/industrial-cybersecurity.html
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 customers' exposure to cyber
threats.
To stay informed about product updates at all times, subscribe to the Siemens Industrial Cybersecurity RSS Feed
(
https://new.siemens.com/global/en/products/services/cert.html
Notes to Section 6 Wiring
External power supply to modules
Even if the main supply to the plant is disconnected, externally supplied modules can continue to carry voltage. An electric
shock on contact with live parts can lead to death or serious injury.
For special SIMATICmodules, e.g. relay modules, you can connect or switch voltages larger than 24 V DC, e.g. 230 V AC. In
some applications, these modules are supplied with voltages from outside the system (external power supply). In the event of
an external power supply, a dangerous voltage may still be present on these modules even if the system is disconnected.
Maintenance
Ensure the following points before starting work:
• The plant is completely disconnected from the power supply.
All externally supplied plant units are disconnected from the power supply
•
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