For your safety
C9900-G05x6 Version: 1.0
2 For your safety
The signal panel and its meanings are explained in the chapter on safety. They contain fundamental safety
instructions that are essential for the avoidance of personal injuries and damage to property.
Exclusion of liability
Liability on the part of Beckhoff Automation GmbH & Co. KG is excluded in the following cases:
• Failure to comply with this documentation
• Improper use
• Use of untrained personnel
• Use of unauthorized spare parts
2.1 Description of safety symbols
The following safety symbols are used in these operating instructions. In order to avoid personal injuries and
damage to property, read and follow the safety and warning notices.
Warning of personal injuries:
DANGER
Disregarding the safety notice will lead to death or serious injuries.
WARNING
Disregarding the safety notice may lead to death or serious injuries.
CAUTION
Disregarding the safety notice may lead to minor injuries.
Warning of damage to property:
NOTE
Disregarding the notice may lead to damage to property.
2.2 Intended use
Control Panels and Panel PCs with a compact push-button extension enable the user-specific arrangement
of electromechanical push-button keys with signal lamp directly on the operating unit. It enables precise
adaptation of the Control Panel to the machine control requirements. In many cases a machine operator
control panel is no longer required, since all functions are integrated in the Control Panel.
Improper use
Do not use the compact push-button extensions in the following areas:
• potentially explosive atmospheres
• Areas with extreme environmental conditions, such as particularly high or low temperatures above and
below the operating temperature range
• Areas in which the device is loaded beyond the EMC interference immunity
• Areas (e.g. residential areas) in which the EMC requirements for interference emissions are
inadequate
• Areas in which the device is loaded beyond its shock resistance
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