Further Notes On Configuring And Installing The Module - Siemens SIMATIC S5 Manual

Installation Guidelines
2.4

Further Notes on Configuring and Installing the Module

As the module is usually used as a component in larger systems or plants, the following notes are
intended to help you safely integrate the module into its environment.
Notes to be observed for the installation and startup of the module, depending on individual
applications:
Warning
• Adhere to any safety and accident-prevention regulationsapplicable to your
situation and system
• If your system has a permanent power connection (stationary equipment) that is
not equipped with an isolating switch
and/or fuses that disconnect all poles, install either a suitable isolating switch or
fuses in the building wiring system. Connect your system to a ground conductor.
• Before startup, if you have units that operate using the main power supply,
makes sure that the voltage range setting on the equipment matches the local
main power voltage.
• When using a 24 V supply, make sure you provide proper electric isolation
between the main supply and the 24 V supply. Use only power supplies
manufactured according to IEC 364-4-41 or HD 384.04.41 (VDE 0100, part 410).
• Fluctuations or deviations of the supply voltage from the rated value may not
exceed the tolerance limit specified in the technical data. If they do, functional
failures or dangerous conditions can occur in the electronic modules or
equipment.
• Take suitable measures to make sure that programs that are interrupted by a
voltage dip or power failure resume proper operation when the power is
restored. Make sure that dangerous operating conditions do not occur even
momentarily. If necessary, force an EMERGENCY OFF.
• EMERGENCY OFF devices must be in accordance with EN 60204/IEC 204
(VDE 0113) and be effective in all operating modes of the equipment. Make
certain you prevent any uncontrolled or undefined restart when the
EMERGENCY OFF devices are released. Install power supply and signal cables
so that inductive and capacitive interference cannot affect the automation
functions.
• Install your automation system and its operative components so as to prevent
unintentional operation.
• Automation equipment can assume an undefined state in the case of a wire
break in the signal lines. To prevent this, take the proper hardware and software
safety measures when linking the inputs and outputs of the automation
equipment.
2-4
Standard Function Counter
EWA 4NEB 812 6131-02