CPU 31xC and CPU 31x, Technical Data 
Manual, 01/2006 Edition, A5E00105475-06 
1-1 
Guide to the S7-300 documentation 
1
Overview 
There you find a guide leading you through the S7-300 documentation. 
Selecting and configuring 
Table 1-1  Ambient influence on the automation system (AS) 
Information on..  is available in ... 
What provisions do I have to make for AS installation 
space? 
S7-300, CPU 31xC and CPU 31x operating instructions: 
Installation: Configuring - Component dimensions 
S7-300, CPU 31xC and CPU 31x operating instructions: 
Installation: Mounting - Installing the mounting rail 
How do environmental conditions influence the AS?  S7-300, CPU 31xC and CPU 31x operating instructions: 
Installation: Appendix 
 
Table 1-2  Galvanic isolation 
Information on..  is available in ... 
Which modules can I use if electrical isolation is required 
between sensors/actuators? 
S7-300, CPU 31xC and CPU 31x operating instructions: 
Hardware and Installation: Configuring – Electrical 
assembly, protective measures and grounding 
Module Data Manual 
Under what conditions do I have to isolate the modules 
electrically? 
How do I wire that? 
S7-300, CPU 31xC and CPU 31x operating instructions: 
Hardware and Installation: Configuring – Electrical 
assembly, protective measures and grounding 
CPU 31xC and CPU 31x operating instructions: Installation: 
Wiring 
Under which conditions do I have to isolate stations 
electrically? 
How do I wire that? 
S7-300, CPU 31xC and CPU 31x operating instructions: 
Installation – Configuring – Configuring subnets