Newport NPC DIG Series, Instruction Manual

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7
4 Purchased Part Package

Please check the completeness of the delivery after receiving the shipment:

piezo amplifier NPCxxxDIG

wide range power supply 24 V DC

RS232 cable

USB cable

instruction manual

CD-ROM with driver, software, and instruction manual
5 Instructions for using piezo electrical elements and power supplies

Piezoelectric actuators from Newport Corporation are controlled by voltages up to 150 V.
These values can be quite hazardous. Therefore, read the installation instructions carefully
and ensure that only authorized personnel handle the power supply.

After transportation, piezoelectric actuators should be allowed to adapt to room temperature
for approximately 2 hours before being switched on.

Piezoelectric actuators are made from ceramic materials with and without metallic casings.
The piezo-ceramic is a relatively brittle material. This should be noted when handling
piezoelectric actuators. All piezo elements are sensitive to bending or shock forces.

Due to the piezoelectric effect, piezo actuators can generate electrical charges by changing
the mechanical load or the temperature, or by actions such as the ones described above.

Piezoelectric actuators are able to work under high compressive forces. Only actuators with
a pre-load can be used under tensile loads (these tensile forces must be less than the pre-
load given in the data sheet). Please note that acceleration of the ceramic material (e.g.,
caused by fall down, discharging, or high dynamic application) will occur.

After excitation of the actuators by a voltage in the upper control range, the ceramic will
move and generate an opposite high voltage after disconnection.

Heating of the ceramic material will occur during dynamic operation and is caused by
structure conditional loss processes. This may cause failure if the temperature exceeds
specified values cited below. With increasing temperature up to the Curie temperature T
C
,
(usual values approx. 140°C - 250°C) the piezoelectric effect disappears. We recommend
working in temperatures up to T
C
/2 (normally up to 80°C).

Piezoelectric actuators, such as stacks or other devices, work electrically as a capacitor.
These elements are able to store electrical energy over a long period of time (up to some
days) and the stored energy may be dangerous.

If the actuator remains connected to the drive electronics, it will be unloaded within a
second after shutdown and quickly reaches harmless voltage values.

Piezo actuators can only generate voltages by warming or cooling (caused by the
longitudinal change). The discharge potential should not be ignored due to the inner
capacitance. This effect is insignificant at usual room temperature.

Piezo actuators from Newport Corporation are adjusted and glued. Any opening of the
unit will cause misalignment or possible malfunction and will result in the loss of the
guarantee..

Please only use original parts from Newport Corporation .

Please contact Newport Corporation or your local representative if there are any problems
with your actuator or power supply.
Caution! Shock forces may damage the built-in ceramic elements. Please avoid such forces,
and handle the units with care, otherwise the guarantee will be lost.