Siemens installation manual Wiring the S7-400

Wiring the S7-400 4

Chapter Overview

Section	Description	Page
4.1	Supplying Power to Modules	4-2
4.2	Choosing the Power Supply Module	4-3
4.3	Choosing the Load Current Power Supply	4-4
4.4	Assembling an S7-400 with Process I/Os	4-5
4.5	Assembling an S7-400 with Grounded Reference Potential (M)	4-7
4.6	Assembling an S7-400 with Ungrounded Reference Potential	4-8
	(Ungrounded Configuration)
4.7	Assembling an S7-400 with Isolated Modules	4-10
4.8	Parallel Wiring of Digital S7-400 Outputs	4-12
4.9	Grounding	4-13
4.10	Interference-Free Configuration for Local and	4-15
	Remote Connections
4.11	Wiring Rules	4-17
4.12	Wiring the Power Supply Module	4-18
4.13	Wiring the Signal Modules	4-22
4.14	Wiring the Front Connector, Crimping	4-24
4.15	Wiring the Front Connector, Screw Terminals	4-25
4.16	Wiring the Front Connector, Spring-Type Terminals	4-26
4.17	Fitting the Strain Relief	4-28
4.18	Labeling a Front Connector	4-29
4.19	Fitting the Front Connector	4-32
4.20	Interconnecting the CR and ER(s)	4-35
4.21	Setting the Fan Subassembly to the Line Voltage and Wiring It	4-37
4.22	Cable routing in cable ducts or fan subassemblies	4-38
4.23	Routing Fiber-Optic Cables	4-38

Automation System S7-400	Hardware and Installation	4-1
A5E00850741-01