SIMATIC NET
S7-1200
Compact Switch Module CSM 1277 G2
Compact Operating Instructions
Original instructions
Scope of validity
This document is valid for the following devices:
Device
CSM 1277 G2
1
Notes on security and product conformity
Function
The unmanaged Industrial Ethernet Switch CSM 1277 G2 allows for the installation of Industrial Ethernet bus and star
structure with switching functionality. They are designed for use in the control cabinet.
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 additional information on industrial cybersecurity measures that may be implemented, please visit
https://www.siemens.com/cybersecurity-industry.
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 Cybersecurity RSS Feed under
https://new.siemens.com/cert.
EU and UK Declaration of Conformity
You will find the EU and UK Declaration of Conformity on the Internet (https://sieportal.siemens.com/su/blv63).
Documentation
The complete documentation consists of operating instructions and system manuals. You will find the documentation on the
Internet (https://sieportal.siemens.com/su/blv7U).
Storing the documentation
Keep this documentation for later use.
1. Download the documentation after you receive your device, no later than the first assembly/commissioning.
2. Keep this version of the documentation.
Updating the documentation
The device documentation is updated in digital form. New features are provided in an updated version when the functions
are extended, in particular.
1. Download the current version as described above.
2. Keep this version of the documentation as well.
© Siemens 2025. All rights reserved
A5E54595177-AA, 06/2025
Article number
6GK7277-1AA50-0AA0
3