Siemens SINUMERIK 840D sl Manual page 10

Fundamental safety instructions
1.1 General safety instructions
Danger to life when live parts are touched on damaged devices
Improper handling of devices can cause damage.
For damaged devices, hazardous voltages can be present at the enclosure or at exposed
components; if touched, this can result in death or severe injury.
● Ensure compliance with the limit values specified in the technical data during transport,
● Do not use any damaged devices.
Danger to life through electric shock due to unconnected cable shields
Hazardous touch voltages can occur through capacitive cross-coupling due to unconnected
cable shields.
● As a minimum, connect cable shields and the cores of cables that are not used at one
Danger to life due to electric shock when not grounded
For missing or incorrectly implemented protective conductor connection for devices with
protection class I, high voltages can be present at open, exposed parts, which when touched,
can result in death or severe injury.
● Ground the device in compliance with the applicable regulations.
Danger to life due to fire spreading if housing is inadequate
Fire and smoke development can cause severe personal injury or material damage.
● Install devices without a protective housing in a metal control cabinet (or protect the device
● Ensure that smoke can only escape via controlled and monitored paths.
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WARNING
storage and operation.
WARNING
end at the grounded housing potential.
WARNING
WARNING
by another equivalent measure) in such a way that contact with fire is prevented.
NCU 7x0.3 PN, NCU 7x0.3B PN
Manual, 06/2014, 6FC5397-1EP40-5BA1