Siemens SINUMERIK 808D Operating Instructions Manual page 8

Safety instructions
Mechanical installation
Death or serious injury from electric shock
The equipment which is not diconnected from the mains or properly protected contains
hazardous voltage.
Such a voltage may lead to death or serious injury.
Before installing or removing the components of the control system, make sure that the
system is disconnected from the mains. In addition, do install the control system in a
distribution cabinet with an adequate protection level.
Death or serious injury from fire or electric shock
If the equipment operates in an area subject to inflammables or combustibles, water or
corrosion hazards, it contains high risk of fire or electric shock.
The fire or electric shock may lead to death or serious injury.
Do install the control system in an area free of inflammables or combustibles, water or
corrosion hazards.
Note
When dimensioning the control cabinet, make sure that the installed components do not
exceed the permissible ambient temperature, even if the outside temperature is high.
Electrical installation
Damage to the control system
The high-voltage components have strong interference in 24 V DC power supply.
If the 24 V DC power supply is not isolated from high-voltage components, the control
system may be damaged.
The 24 V DC protective extra-low voltage must be generated as a protective extra-low
voltage with safe electrical isolation (to IEC 204-1, Section 6.4, PELV), and grounded by
with a PELV M signal connection to the central grounding point of the system.
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DANGER
DANGER
CAUTION
Mechanical Installation Manual
Operating Instructions, 12/2012, 6FC5397-2EP10-0BA0