THORLABS TPZ001, User Manual

Page: 12 / 60

12 HA0143T Rev 12K Sept 2015
Chapter 3
3.3 Electrical Installation
3.3.1 Connecting a Piezo Actuator
Fig. 3.2 Rear Panel Connections
HV OUT
(SMC connector) – 0 to 150V, 0 to 7.5mA. Provides the drive signal to the
piezo actuator. The maximum voltage (75V, 100V or 150V) is set via the front panel
(see Section 4.4.2.) or via the GUI ‘Settings’ panel (see Section 6.2.).
EXT IN
(SMA connector) – Used to connect an external analogue signal source to
control the operation of the cube. The input voltage range is 0 to +10V and the input
impedance is 12 k
Ω
.
The way the signal driving the EXT IN input controls the unit depends on the operating
mode. In
open loop mode, the voltage on the EXT IN input can be used to drive the
high voltage amplifier directly and the output voltage is proportional to the driving
voltage. In
closed loop mode, EXT IN can be used as a position feedback input,
designed to be driven by an external position reader (such as the TSG001 Strain
Gauge Reader). These operating modes are detailed in Section 5.3. to Section 5.6.
MONITOR
(SMA connector) – This low-voltage (0 to +10V), output can be used to
monitor the signal at the HV OUT high voltage output. In its most common use, it can
be connected directly to an oscilloscope to observe the waveforms or voltage levels
present at the high voltage output.
Caution
In open loop mode, the EXT IN connector drives the HV amplifier circuit
directly. If an external input is used, the output voltage limits (i.e. 75V, 100V or
150V) can be exceeded.
Note
The TPZ001 has two main, selectable output voltage ranges of 0 to 75V or
0 to 150V, to allow driving piezo actuators with different drive
requirements. (In addition, there is a 100V limit for operation under
software control). Regardless of which range is selected, the input and
output voltage range on the EXT IN and MONITOR connectors is always
0 to +10V full scale.