18 - 8643
english
6
INSTALLATION
6.1 Safety Precautions
DANGER!
Hazard due to electrical voltage in the system!
Working on the unit involves acute risk of injury.
• Before starting work, be sure to switch off the supply voltage!
• Observe all applicable accident prevention and safety regulations for
electrical equipment during installation, operation and maintenance of
the device!
• In a potentially explosive atmosphere, only remove the connection ter-
minal cover for Ex-e circuits after the connected Ex-e electrical circuits
have been de-energized for more than 4 minutes.
After 4 minutes,
the internally stored energy is completely gone and the terminals are
voltage-free.
Danger from use in unauthorized ambient temperature ranges!
Hazardous situations may arise due to use in unauthorized ambient tem-
perature ranges, especially in potentially explosive atmospheres.
• Remain within the appropriate ambient temperature range, for each
type (e. g. 8643-4-AL-KS-F-I/O), according to the table in the EC-
Type Examination Certificate.
Hazard due to unauthorized combination of the types of ignition
protection!
Hazardous situations may arise due to unauthorized combination of
types of ignition protection!
• Once the bus supply has been used in an increased ignition protec-
tion class (e), the bus supply may no longer be done at the intrinsical
standard ignition protection class (i).