Bernecker + Rainer 5PC820.SX01-00, User Manual, Page: 19 / 318

General information • Safety notices
Section 1
Genera
l in
forma
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19 Automation PC 820 User's Manual V 1.20
2.5 Installation
• Installation must take place according to the documentation, using suitable equipment
and tools.
• Devices must be installed without voltage applied and by qualified personnel. Before
installation, voltage to the switching cabinet should be switched off and prevented from
being switched on again.
• General safety regulations and nationally applicable accident prevention guidelines must
be observed.
• Electrical installation must be carried out according to the relevant guidelines (e.g. line
cross section, fuse, protective ground connection).
2.6 Operation
2.6.1 Protection against touching electrical parts
To operate programmable logic controllers, operating and monitoring devices or uninterruptible
power supplies, certain components must carry dangerous voltage levels of over 42 VDC. A life-
threatening electrical shock could occur if you come into contact with these parts. This could
result in death, severe injury or material damage.
Before turning on the programmable logic controller, the operating and monitoring devices and
the uninterruptible power supply, ensure that the housing is properly grounded (PE rail). The
ground connection must be established when testing the operating and monitoring devices or
the uninterruptible power supply, even when operating them for only a short time.
Before turning the device on, make sure that all parts with voltage applied are securely covered.
During operation, all covers must remain closed.
2.6.2 Environmental conditions - dust, humidity, aggressive gases
Use of operating and monitoring devices (e.g. industrial PCs, power panels, mobile panels, etc.)
and uninterruptible power supplies in very dusty environments should be avoided. Dust
collection on the devices influences their function and, especially in systems with active cooling
(fans), sufficient cooling cannot be guaranteed.
The presence of aggressive gases in the environment can also lead to malfunctions. When
combined with high temperature and humidity, aggressive gases - e.g. with sulfur, nitrogen and
chlorine components - start chemical processes that can damage electronic components very
quickly. Signs of the presence of aggressive gases are blackened copper surfaces and cable
ends on existing installations.
For operation in dusty or humid conditions, correctly installed (cutout installation) operating and
monitoring devices like Automation Panel or Power Panel are protected on the front side. The
rear side of all devices must be protected from dust and humidity and must be cleaned at suitable
intervals.