Siemens Simatic S7-300 - Page 9

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S7-300, Installation and Hardware
EW A 4NEB 710 6078-02a
Contents
Preface
1 Product
Overview
2 Mechanical Configuration
2.1
Horizontal and V ertical Arrangement of an S7-300 2-2. . . . . . . . . . . . . . . . . . . .
2.2 Mounting Dimensions of the S7-300 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 The Module Arrangement for an S7-300 Configuration on One Rack 2-6. . . .
2.4 The Module Arrangement for an S7-300 Configuration on Several Racks
(not CPU 312 IFM/313) 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Addressing the S7-300 Modules
3.1
Slot-Oriented Addressing for Modules (Default Addressing) 3-2. . . . . . . . . . . .
3.2 User-Oriented Address Allocation with the CPU 315-2 DP 3-4. . . . . . . . . . . . .
3.3 Addressing Signal Modules 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 Addressing the Integrated Inputs and Outputs of the CPUs 312 IFM and
314 IFM 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Electrical Configuration
4.1
General Rules and Guidelines for Operating an S7-300
Programmable Controller 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Current Consumption and Power Losses of an S7-300 4-4. . . . . . . . . . . . . . . .
4.3 Configuring the S7-300 Process Peripherals 4-8. . . . . . . . . . . . . . . . . . . . . . . . .
4.4 S7-300 Configuration with Grounded Reference Potential 4-12. . . . . . . . . . . . .
4.5 S7-300 Configuration with Ungrounded Reference Potential
(not CPU 312 IFM) 4-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6 S7-300 Configuration with Isolated Modules 4-14. . . . . . . . . . . . . . . . . . . . . . . . .
4.7 Configuration of an S7-300 with Non-Isolated Modules 4-16. . . . . . . . . . . . . . . .
4.8 Cabling Inside Buildings 4-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.9 Cabling Outside Buildings 4-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10 Protecting Digital Output Modules Against Induced Overvoltage 4-21. . . . . . . .
4.11 Lightning Protection 4-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.11.1 Lightning Protection Zone Concept 4-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.11.2 Rules for the T ransition between Lightning Protection Zones 0  1 4-26. . . . .
4.11.3 Rules for T ransition between Lightning Protection Zones 1  2 and
Greater 4-28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.11.4 Example Circuit for Surge Protection of Networked S7-300s 4-31. . . . . . . . . . .