Siemens CPU 312 Hardware And Installation Guide

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S7-300 Automation System, Hardware and Installation: CPU 31xC and CPU 31x
viii A5E00105492-03
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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 .........................................................................................2-2
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 .......................................................................5-8
4-5 Types of cabinet..........................................................................................5-13
4-6 Choice of cabinets.......................................................................................5-15
4-7 VDE specifications for the installation of a PLC system .............................5-17
4-8 Protective grounding measures ..................................................................5-23
4-9 Connection of the load voltage reference potential ....................................5-25
4-10 Connection of the load voltage reference potential....................................5-26
4-11 Connection of the load voltage reference potential....................................5-27
4-12 Characteristics of load power supply units.................................................5-28
4-13 Nodes on the subnet ..................................................................................5-32
4-14 MPI/PROFIBUS DP addresses..................................................................5-33
4-15 MPI addresses of CPs/FMs in an S7-300..................................................5-34
4-16 Possible interface operating modes for CPU 317-2 DP.............................5-36
4-17 The following devices may be connected ..................................................5-37
4-18 Available bus cables...................................................................................5-38
4-19 Marginal conditions for wiring interior bus cables ......................................5-39
4-20 Bus connector ............................................................................................5-39
4-21 RS 485 repeater .........................................................................................5-40
4-22 PG patch cord ............................................................................................5-40
4-23 Permitted cable lengths in an MPI subnet segment...................................5-41
4-24 Permitted cable lengths in a PROFIBUS subnet segment.........................5-41
4-25 Stub cable lengths per segment.................................................................5-42
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 Assignment of front connectors to modules................................................7-10
7-6 Wiring the front connector ...........................................................................7-11
7-7 Assigning the labeling strips to modules.....................................................7-13
7-8 Assigning the shielding diameter to shielding terminals .............................7-14
8-1 Integrated inputs and outputs on the CPU 312C ..........................................8-6
8-2 Integrated inputs and outputs on the CPU 313C ..........................................8-7
8-3 Integrated inputs and outputs on the CPU 313C-2 PtP/DP ..........................8-7
8-4 Integrated inputs and outputs on the CPU 314C-2 PtP/DP ..........................8-8

Siemens CPU 312 Specifications

General

Brand	Siemens
Model	CPU 312
Category	Processor
Language	English