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Technical Information
HC8X Heat Control
Safety Information
8010043
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SICK AG · All rights reserved
E-9
Safety Information
Electrical hazard!
Dangerous voltage in the control unit.
Even with the power switched OFF, voltage may still be applied to some parts of the control
unit when the control unit is connected to the mains.
For operation, the control unit must always be grounded.
Never disconnect or remove the protective conductors in the control unit or in the sup-
ply line.
Electrical hazard!
To avoid a potential hazard of injury by electric voltage and to prevent the control units
from damage, switch OFF the control unit and disconnect it from the mains at all poles
before performing or modifying any electrical connections.
Verify whether the control unit is voltage-free.
Secure the switched OFF control unit against any unauthorized or unintentional switch-
ing on.
Electrical hazard!
This control unit may be connected to the mains only by authorized/qualified personnel.
Only a SICK service engineer or similarly trained and authorized person should be per-
mitted to service or repair the control unit.
The control unit operates with high voltages. Even with the power switched OFF, high
voltages can be present inside the control unit.
When the control unit is switched on, the electrical connections are live. Opening covers
or removing parts is likely to expose live parts.
Capacitors inside the control unit may still be charged even if the control unit has been
switched off and disconnected from all voltage sources.
Do not attempt to make internal adjustments or replacements except as directed in this
User's Handbook.
Do not operate the control unit with any covers or parts removed.
Disconnect the control unit from all voltage sources before opening it. If the opened
control unit must be operated for further adjustment, maintenance or repair, this must
be done only by a trained person who is aware of the hazard involved and knows how
to protect himself with appropriate measures.