6 Starting and Operating
P-5x7/P-5x8 Positioners
PZ82E
Version: 3.2.0
25
In this Chapter
General Notes on Starting and Operating ................................................................................... 25
Operating the P-5x7/P-5x8 .......................................................................................................... 27
Discharging the P-5x7/P-5x8 ........................................................................................................ 27
6.1
General Notes on Starting and Operating
CAUTION
Risk of electric shock if the protective earth conductor is not connected!
If a protective earth conductor is not or not properly connected, dangerous touch voltages can
occur on the P-5x7/P-5x8 in the case of malfunction or failure of the system. If there are touch
voltages, touching the P-5x7/P-5x8 can result in minor injuries from electric shock.
Connect the P-5x7/P-5x8 to a protective earth conductor (p. 18) before starting.
Do
not
remove the protective earth conductor during operation.
If the protective earth conductor has to be removed temporarily (e.g., in the case of
modifications), reconnect the P-5x7/P-5x8 to the protective earth conductor before
restarting.
NOTICE
Destruction of the piezo actuator due to electric flashovers!
Using the P-5x7/P-5x8 in environments that increase the electrical conductivity can lead to the
destruction of the piezo actuator by electric flashovers. Electric flashovers can be caused by
moisture, high humidity, liquids, and conductive materials (e.g., metal dust). In addition,
electric flashovers can also occur in certain air pressure ranges due to the increased
conductivity of the air.
Avoid operating the P-5x7/P-5x8 in environments that can increase the electric
conductivity.
Operate the P-5x7/P-5x8 only within the permissible ambient conditions and classifications
(p. 41).
NOTICE
Decreased lifetime due to permanently high voltage!
Applying a continuous high static voltage to piezo actuators leads to a considerable reduction
in the lifetime of the piezo ceramic.
When the P-5x7/P-5x8 is not used but the electronics remain switched on to ensure
temperature stability, discharge the P-5x7/P-5x8 (p. 27).
6
Starting and Operating
