Siemens S5-155U System Manual page 19

Notes on Using this Manual/Overview
1 - 2
Given as a guide in the following are pointers on how this manual is
organized; they will assist you when using your S5-135U/155U
programmable controller.
• • At the end of this manual you will find the "ESD Guidelines."
You must observe these to the letter and follow them during the
entire time you are working with the S5-135U/155U PLC. If your
PLC requires repair, you must observe the Repair Guidelines in
Section 4.1.4.
• • Chapter 3 contains the Installation Guidelines with information
on interference-free installation of the S5-135U/155U PLC.
Which of the remaining chapters of this manual you may require
when working with your PLC will depend on the extent of your
automation task and on the configuration of your PLC.
For a basic configuration in single-processor operation without
expansion units, you will need the following chapters:
• • Chapter 4 describes the central controller (CC) in Section 4.1.
Described are the technical features, installation, startup and
maintenance of the CC. Section 4.3 describes the power supply
units. You will find a separate description of the 6ES5 955-3NA12
power supply unit in Section 4.5. Both sections describe the
installation and startup as well as the necessary maintenance on
the power supply units. The 24 V/4 A load power supply is
described in Section 4.4.
• • Chapter 5 contains the instructions for the individual CPUs.
Described here are the technical features, installation and startup
of the individual CPUs. The various methods of operating the
CPUs are also described, as are the CPU statuses where they can
be directly indicated by the LEDs on the module. If you use
memory submodules or memory cards (CPU 948), you can look
up the necessary information in Sections 5.5 to 5.7.
• • Chapter 8 and Chapter 9 describe the digital and analog I/O
modules. Described here are the installation, wiring and operation
of these modules. Individual I/O modules exhibit specific features
which are discussed in separate chapters.
System Manual
C79000-D8576-C199-03