S7-300 Automation System Module data 
Manual,  08/2006, A5E00105505-04 
iii 
Preface 
Purpose of the manual 
The information contained in this manual can be used as a reference to operating, to 
functions, and to the technical data of the signal modules, power supply modules and 
interface modules of the S7-300. 
How to install, for example assemble and wire, an S7-300 or ET 200M system using those 
modules is described in the relevant manuals for establishing the system. 
Basic knowledge required 
This manual presumes a general knowledge in the field of automation engineering.  
Range of validity of this manual 
The manual describes the components based on the data valid at the time of its release.  
SIEMENS reserves the right of including a product information for each new module, and for 
each module of a later version. 
Changes compared to the previous version 
Changes / enhancements compared to the previous version described in this manual:  
●  The 'Analog modules' chapter has been revised extensively and split into 
–  Fundamentals of analog value processing 
–  Representation of the analog values of analog modules 
–  Modules overview of analog modules 
●  Packet assembling of documentation packet changed 
●  Various corrections were made.