Connecting A Module Assembly - Siemens S7-400 Installation Manual

8.5

Connecting a Module Assembly

Introduction
The individual modules and interface submodules of a module assembly can be
connected via commercially-available cables and connectors.
Requirements
The connector housings and cables must meet the following requirements:
• Connector housing
The height of the connector housing should not be more than 43 mm, the width
up to 19 mm. It must have a 45° side outlet for the cable. These requirements
are met by the connector housings of cables and lines listed in the chapter on
spare parts and accessories in the Reference Manual.
• Cables
You should only use cables that are shielded using a braided screen. The shield
must be connected to the housing ground with low resistance.
Components to be Connected
A module assembly can comprise the following components to be connected:
• CPU with MPI and interface submodules
• EXM expansion module with interface submodules
• ATM AT adapter module with short AT card
• Mass storage module with parallel interface
Connecting the CPU
Connecting the MPI for particular applications is explained in Chapter 5,
"Networking."
Connecting Interface Submodules (IFs)
The interface submodules are equipped with subminiature D female or male
connectors. To connect devices to the interface submodules, you must fabricate
cables with the appropriate mating connectors or obtain preassembled,
commercially available cables.
The pin assignments of the subminiature D connectors can be found in the
description of the relevant interface submodule in the chapter on interface
submodules of the Reference Manual.
S7-400 and M7-400 Programmable Controllers Hardware and Installation
A5E00069481-04
Assembling the M7-400
8-29