Preface
PtP coupling and configuration of CP 340
4 Manual, 04/2011, A5E00369892-03
Certifications
You can find detailed information about certificates, approvals and standards in the manual
S7-300 Automation System; S7-300 Module Specifications
.
Assistance in using the manual
This manual has the following features to help you to find the information you need quickly:
● In the chapters, the information in the left-hand column of each page summarizes the
content of each section.
● Following the appendices, a glossary defines important technical terms used in the
manual.
● At the end of the manual a comprehensive index facilitates quick access to information
relating to specific subjects.
Additional assistance
Please contact your local Siemens representative if you have any queries about the products
described in this manual.
● You will find contact details for your representative at:
http://www.siemens.com/automation/partner
● You will find the guide to the technical documentation for the individual SIMATIC products
and systems at:
http://www.siemens.com/simatic-doku
● You will find the online catalog and online ordering system at:
http://www.siemens.com/automation/mall
Conventions
The abbreviation CP 340 is used in this manual when information applies to all three module
variants: CP 340-RS 232C, CP 340-20mA TTY and CP 340-RS 422/485.