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22882-D02
Single-Channel Piezo Controller, 75 V to 150 V
gain values are predefined with a tolerance of +/- 2%. The input impedence is 20k
load.
The exact bandwidth achievable is dependent on a variety of factors, such as the load
capacitance but in general is a few kHz in open loop mode and about 200 Hz in closed
loop.
Before they can be used, these inputs must be enabled in the Settings panel (see
Section 5.2.) or in software by calling the Piezo SetIPSource method (see the
APTServer helpfile
available from the Windows ‘Start’ menu).
The difference between the two signals is amplified internally before being routed to
the HV OUT connector. The high voltage amplifier output will be 0V when the positive
input is equal to the negative input, and will be at full scale (75V, 100V or 150V
depending on the voltage range selected) when the positive input minus the negative
input equals 10V. If either input is unconnected, it contributes 0V. The differential
nature of these inputs can be useful in some applications, as they reject unwanted
common mode signals. Although they are differential, these inputs can also be used
in single-ended mode. In this configuration, the +ve input can be considered as non-
inverting and the -ve input as inverting. The unused input can simply be left
unconnected.
PIEZO IN
– This Female 9-Pin D-type connector receives the signal from the position
sensor (strain gauge) of the piezo actuator to provide the feedback for the control loop
- see Section A.1. for pin out details.
HV OUT
(SMC connector) – 0 to 150V, 0 to 500mA. Provides the drive signal to the
piezo actuator.
Caution
It is recommended that only cables supplied by Thorlabs are used to connect
the piezo drive outputs. Other cables may not be rated to the same
specification. If using third party cables for the high voltage output, the HV cable
used must have insulation able to withstand 200V DC / 150V AC.
