Table Of Contents - Siemens SIMATIC S7-300 Hardware And Installation Manual

Contents
1 Preface.............................................................................................................................1-1
2 Guide to the S7-300 documentation .............................................................................2-1
3 Installation Order ............................................................................................................3-1
4 S7-300 modules ..............................................................................................................4-1
5 Configuring .....................................................................................................................5-1
5.1 Summary of the Content ...................................................................................5-1
5.2 Basic Principles of Planning..............................................................................5-2
5.3 Component dimensions ....................................................................................5-4
5.4 Arranging modules on a single rack..................................................................5-7
5.5 Arranging modules on multiple racks................................................................5-9
5.6 Selection and installation of cabinets..............................................................5-12
5.7 Example: Selecting a cabinet..........................................................................5-14
5.8 Electrical assembly, protective measures and grounding...............................5-16
5.8.1 Grounding concept and overall structure ........................................................5-16
5.8.2 Installing an S7-300 with grounded reference potential..................................5-17
5.8.3 Installing an S7-300 with ungrounded reference potential
(not CPU 312 IFM or CPU 31xC)....................................................................5-20
5.8.4 Isolated or non-isolated modules? ..................................................................5-23
5.8.5 Grounding........................................................................................................5-26
5.8.6 Overview: Grounding ......................................................................................5-28
5.9 Selecting the load power supply unit ..............................................................5-31
5.10 Planning subnets.............................................................................................5-34
5.10.1 Extending and networking subnets .................................................................5-34
5.10.2 Basic Principles of MPI, DP and PtP Subnets ................................................5-35
5.10.3 Interfaces.........................................................................................................5-39
5.10.4 Network components ......................................................................................5-41
5.10.5 Cable length ....................................................................................................5-45
5.10.6 Sample networks.............................................................................................5-46
6 Installation.......................................................................................................................6-1
6.1 Installing an S7-300 ..........................................................................................6-1
6.2 Installing the rail ................................................................................................6-3
6.3 Installing modules on the rail.............................................................................6-7
6.4 Label the modules .............................................................................................6-9
7 Wiring...............................................................................................................................7-1
7.1 Wiring ................................................................................................................7-1
7.2 connecting the protective conductor to the rail .................................................7-4
7.3 Adjusting the power supply module to mains voltage.......................................7-5
7.4 Wiring the power supply module and the CPU .................................................7-6
S7-300 Programmable Controller Hardware and Installation
A5E00105492-02
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