Installation manual

4-1
S7-400 and M7-400 Programmable Controllers Hardware and Installation
A5E00069481-04
Wiring the S7-400
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) 4-8
4.6 Assembling an S7-400 with Ungrounded Reference Potential
(Ungrounded Configuration)
4-9
4.7 Assembling an S7-400 with Isolated Modules 4-11
4.8 Parallel Wiring of Digital S7-400 Outputs 4-13
4.9 Grounding 4-14
4.10 Interference-Free Configuration for Local and
Remote Connections
4-16
4.11 Wiring Rules 4-18
4.12 Setting the VAC Power Supply Module to the Line Voltage 4-19
4.13 Wiring the Power Supply Module 4-21
4.14 Wiring the Signal Modules 4-25
4.15 Wiring the Front Connector, Crimp Snap-On Terminals 4-27
4.16 Wiring the Front Connector, Screw-Type Terminals 4-28
4.17 Wiring the Front Connector, Spring-Type Terminals 4-29
4.18 Fitting the Strain Relief 4-31
4.19 Labeling a Front Connector 4-32
4.20 Fitting the Front Connector 4-36
4.21 Interconnecting the CR and ER(s) 4-39
4.22 Setting the Fan Subassembly to the Line Voltage and Wiring It 4-41
4.23 Routing Cables Using Cable Ducts or Fan Subassemblies 4-43
4.24 Routing Cables Using Fiber-Optic Cables 4-43
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