Siemens Simatic S7-300, Hardware And Installation Manual, Page: 3 / 242

S7-300 Programmable Controller Hardware and Installation
A5E00105492-01
iii
Contents
1 1 Preface 1-1
2 2 Quick Guide 2-1
2.1 Quick Guide: selecting and arranging ...............................................................2-1
2.2 Quick Guide: Installation ...................................................................................2-4
3 3 Product overview 3-1
3.1 Product overview...............................................................................................3-1
4 4 Configuring 4-1
4.1 In this Chapter ...................................................................................................4-1
4.2 Basics................................................................................................................4-1
4.3 Component dimensions ....................................................................................4-4
4.4 Arranging modules on a single module rack.....................................................4-7
4.5 Arranging modules on multiple module racks ...................................................4-9
4.6 Selection and installation of cabinets..............................................................4-11
4.7 Sample application: Selecting a cabinet .........................................................4-13
4.8 Electrical assembly, protective measures and grounding...............................4-14
4.8.1 Grounding conception and overall structure ...................................................4-14
4.8.2 S7-300 installation with grounded reference potential....................................4-15
4.8.3 S7-300 assembly with floating reference potential
(not CPU 312 IFM and CPU 31xC) .................................................................4-16
4.8.4 Isolated or non-isolated modules? ..................................................................4-18
4.8.5 Grounding........................................................................................................4-21
4.8.6 Overview: Grounding ......................................................................................4-23
4.9 Selecting the load power supply unit ..............................................................4-26
4.10 Configuring a subnet .......................................................................................4-28
4.10.1 Expansion and networking options .................................................................4-28
4.10.2 Basics..............................................................................................................4-30
4.10.3 Interfaces.........................................................................................................4-32
4.10.4 Network components ......................................................................................4-34
4.10.5 Cable length ....................................................................................................4-38
4.10.6 Network samples.............................................................................................4-40
5 5 Installation 5-1
5.1 Installation .........................................................................................................5-1
5.2 Installing the profile rail .....................................................................................5-3
5.3 Installing modules on the profile rail..................................................................5-7
5.4 Label the modules .............................................................................................5-8