Contents
ix
Automation System S7-400 Hardware and Installation
A5E00850741-01
7 Maintenance 7-1...........................................................
7.1 Replacing the Backup Battery 7-2.....................................
7.2 Replacing a Power Supply Module 7-4.................................
7.3 Replacing CPUs 7-5................................................
7.4 Replacing Digital or Analog Modules 7-7...............................
7.5 Changing the Fuses in the Digital Modules 7-9..........................
7.6 Replacing Interface Modules 7-11......................................
7.7 Replacing the Fuse of the Fan Subassembly 7-13........................
7.8 Replacing Fans in the Fan Subassembly During Operation 7-14............
7.9 Replacing the Filter Frame of the Fan Subassembly During Operation 7-16..
7.10 Replacing the Power Supply PCB and Monitoring PCB
of the Fan Subassembly 7-18..........................................
7.11 Replacing Interface Submodules 7-19..................................
A Assembling and Installing Systems A-1......................................
A.1 General Rules and Regulations for Operating the S7-400 A-2.............
A.2 Principles of System Installation for EMC A-5...........................
A.3 Installation of Programmable Controllers for EMC A-9....................
A.4 Examples of EMC-Compatible Assembly A-10...........................
A.5 Shielding Cables A-13................................................
A.6 Equipotential Bonding A-15............................................
A.7 Cabling Inside Buildings A-17..........................................
A.8 Cabling Outside Buildings A-19........................................
A.9 Lightning Protection and Overvoltage Protection A-20.....................
A.9.1 Lightning Protection Zone Concept A-21................................
A.9.2 Rules for the Transition between Lightning Protection Zones 0 and 1 A-23...
A.9.3 Rules for the Transitions between Lightning Protection Zones 1 <-> 2
and Greater A-25....................................................
A.9.4 Sample of a Surge Protection Circuit for Networked S7-400 PLCs A-28.....
A.10 How to Protect Digital Output Modules against Inductive Surge A-30........
A.11 Safety of Electronic Control Equipment A-32.............................
A.12 Interference-Free Connection of Monitors A-34...........................
B Guidelines for Handling Electrostatically-Sensitive Devices (ESD) B-1..........
B.1 What is ESD? B-2...................................................
B.2 Electrostatic Charging of Persons B-3.................................
B.3 General Protective Measures Against Electrostatic Discharge Damage B-4.
Glossary
Index
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