Siemens S7-300 Installation Manual page 8

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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 ...............................................................................2-3
5-1 Components of an S7-300: ..........................................................................4-2
4-1 Rails - overview ............................................................................................5-4
4-2 Module width ................................................................................................5-4
4-3 Shielding terminals - overview .....................................................................5-5
4-4 Interface modules - Overview ......................................................................5-9
4-5 Types of cabinet .........................................................................................5-14
4-6 Choice of cabinets......................................................................................5-16
4-7 VDE specifications for the installation of a PLC system ............................5-18
4-8 Protective grounding measures .................................................................5-25
4-9 Connection of the load voltage reference potential....................................5-27
4-10 Connection of the load voltage reference potential....................................5-28
4-11 Connection of the load voltage reference potential....................................5-29
4-12 Characteristics of load power supply units.................................................5-30
4-13 Nodes on the subnet ..................................................................................5-34
4-14 MPI/PROFIBUS DP addresses..................................................................5-35
4-15 MPI addresses of CPs/FMs in an S7-300 ..................................................5-36
4-16 The following devices may be connected ..................................................5-38
4-17 Available bus cables...................................................................................5-39
4-18 Marginal conditions for wiring interior bus cables ......................................5-40
4-19 Bus connector ............................................................................................5-40
4-20 RS 485 repeater .........................................................................................5-41
4-21 PG patch cord ............................................................................................5-42
4-22 Permitted cable lengths in an MPI subnet segment...................................5-42
4-23 Permitted cable lengths in a PROFIBUS subnet segment.........................5-43
4-24 Stub cable lengths per segment.................................................................5-43
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 Wiring accessories .......................................................................................7-7
7-5 Assignment of front connectors to modules .................................................7-8
7-6 Assignment of front connectors to modules ...............................................7-10
7-7 Wiring the front connector ..........................................................................7-10
7-8 Assigning the labeling strips to modules ....................................................7-13
7-9 Assigning the shielding diameter to shielding terminals ............................7-14
8-1 Integrate inputs and outputs on the CPU 312 IFM.......................................8-6
8-2 Integrate inputs and outputs on the CPU 314 IFM.......................................8-7
9-1 Recommended commissioning procedure - part I: Hardware .....................9-2
9-2 Recommended commissioning procedure - part II: software ......................9-3
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S7-300 Automation System, Hardware and Installation: CPU 312IFM - 318-2 DP
A5E00203919-01