Signal Modules of the S7-400
3-2
Automation System S7-400 Configuration and Use
A5E0044271 1-02
3.1 Signal Modules
Introduction
There are numerous signal modules for the S7-400 automation system. You can
therefore select the most suitable and economic solution for your application.
Digital and Analog Modules
Digital and analog modules are collectively referred to as ”signal modules” (SM).
The ’SM’ abbreviation that is printed on these modules stands for the international
designation, ”signal module”.
Advantages
The modules of the S7-400 offer you the following advantages:
• The modules of the S7-400 are compact and feature high channel density.
• The modules of the S7-400 require little space and are extremely easy to
mount.
• The modules of the S7-400 are designed with uniform connection and display
features.
• All connections are located behind a hinged cover on the front of the modules.
• All modules are configured using the programming software, STEP 7.
• The modules can be hot pulled and plugged.
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