Siemens SIMATIC S7-300 Hardware And Installation Manual page 8

Contents
Tables
2-1 Influence of the ambient conditions on the automation system (AS)................2-1
2-2 Electrical isolation..............................................................................................2-1
2-3 Communication between sensors/actuators and the automation system ........2-2
2-4 Use of centralized and decentralized peripherals .............................................2-2
2-5 Configuration consisting of the central processing unit (CPU) and
expansion modules (EMs).................................................................................2-2
2-6 CPU performance .............................................................................................2-3
2-7 Communication .................................................................................................2-3
2-8 Software ............................................................................................................2-3
2-9 Supplementary features ....................................................................................2-4
4-1 Components of an S7-300: ...............................................................................4-2
5-1 rails - overview ..................................................................................................5-4
5-2 Module width .....................................................................................................5-4
5-3 Shielding terminals - overview ..........................................................................5-6
5-4 Interface modules - Overview ...........................................................................5-9
5-5 Types of cabinet ..............................................................................................5-13
5-6 Choice of cabinets...........................................................................................5-15
5-7 VDE specifications for the installation of a PLC system .................................5-17
5-8 Protective grounding measures ......................................................................5-26
5-9 Connection of the load voltage reference potential.........................................5-28
5-10 Characteristics of load power supply units......................................................5-31
5-11 Nodes on the subnet .......................................................................................5-37
5-12 MPI/PROFIBUS DP addresses.......................................................................5-37
5-13 MPI addresses of CPs/FMs in an S7-300.......................................................5-38
5-14 The following devices may be connected .......................................................5-41
5-15 Available bus cables .......................................................................................5-41
5-16 Marginal conditions for wiring interior bus cables ...........................................5-42
5-17 Bus connector .................................................................................................5-43
5-18 RS 485 repeater ..............................................................................................5-43
5-19 PG patch cord .................................................................................................5-44
5-20 Permitted cable lengths in an MPI subnet segment........................................5-45
5-21 Permitted cable lengths in a PROFIBUS subnet segment .............................5-45
5-22 Stub cable lengths per segment......................................................................5-46
6-1 Module accessories ..........................................................................................6-2
6-2 Installation tools and materials..........................................................................6-3
6-3 Mounting holes for rails .....................................................................................6-5
6-4 Slot numbers for S7 modules............................................................................6-9
7-1 Wiring accessories ............................................................................................7-1
7-2 Conditions for connecting the PS and CPU ......................................................7-2
7-3 Wiring conditions for front connectors...............................................................7-3
7-4 Assignment of front connectors to modules......................................................7-8
7-5 Wiring the front connector ...............................................................................7-10
7-6 Assigning the labeling strips to modules .........................................................7-12
7-7 Assigning the shielding diameter to shielding terminals .................................7-13
8-1 Integrate inputs and outputs on the CPU 312 IFM............................................8-8
8-2 Integrate inputs and outputs on the CPU 314 IFM............................................8-8
8-3 Integrated inputs and outputs on the CPU 312C ..............................................8-9
8-4 Integrated inputs and outputs on the CPU 313C ..............................................8-9
8-5 Integrated inputs and outputs on the CPU 313C-2 PtP/DP ............................8-10
8-6 Integrated inputs and outputs on the CPU 314C-2 PtP/DP ............................8-10
9-1 Recommended commissioning procedure - part I: Hardware ..........................9-2
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S7-300 Programmable Controller Hardware and Installation
A5E00105492-02