Burkert Type 8643 - Manual (Page 18)

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 volt-
age-free.
Do not connect a lead to the 24 v Power supply terminals when using •
the 2-lead version in a potentially explosive atmosphere!
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. 8643-2-AL-KS-F-I/O), according to the table in the EC-
Type Examination Certificate (see
Annex / Type Examination Certifi-
cate).
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 of the 4-wire version has been used in an in- •
creased ignition protection class (e), the bus supply may no longer be
done at the intrinsical standard ignition protection class (i).
warnInG!
unintentional operations or unauthorized tampering can lead to
generally dangerous situations including personal injury.
Take suitable measures to prevent unintentional operation or unauthor- •
ized tampering!