PI P-88 5 Series, User Manual, Page: 34 / 49

6 Starting and Operating
30 Version: 1.1.0 PZ266E P-88x.x5 Piezo Actuator
6.4 Discharging the P-88x.x5
The P-88x.x5 must be discharged in the following cases:

When the P-88x.x5 is not in use but the electronics remain switched on to ensure
temperature stability

If the P-88x.x5 has become accidentally charged due to thermal or mechanical loading

If the connecting cable of the P-88x.x5 is accidentally pulled out of the electronics
during operation
Requirements

You have read and understood the general notes on installation (p. 15).

You have read and understood the general notes on starting and operating (p. 23).
Tools and accessories
If the P-88x.x5 is not connected to the electronics:

Only for P-88x.x5
without
connector (condition as supplied):
− 10 k Ω discharge resistor (not included in scope of delivery); touchable parts must be
adequately insulated for the operating voltage range (p. 40) of the actuator

Only for P-88x.x5 with connector (p. 21):
− Electronics (p. 11) from PI or suitable shorting plug (available on request)
Discharging a P-88x.x5 connected to the electronics

Set the piezo voltage to 0 V on the electronics.
Discharging a P-88x.x5 not connected to the electronics
If the P-88x.x5 does not have a connector:
1. Ensure adequate protection against touching live parts.
2. Short-circuit the stranded wires of the P-88x.x5 for at least a few seconds using a 10 k Ω
discharge resistor
.
If the P-88x.x5 has a connector (p. 21):

Connect the voltage connector of the P-88x.x5 to the switched off PI electronics, which
has an internal discharge resistor, for at least a few seconds.

Alternative: Connect a suitable shorting plug with integrated discharge resistor to the
voltage connector of the P-88x.x5 for at least a few seconds.