Siemens S7-400 installation manual Maintenance, Assembling and Installing Systems

			Contents
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

7.10Replacing 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

Automation System S7-400	Hardware and Installation	ix
A5E00850741-01