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7 Unipolar Output Voltage
The output voltage of a standard PDUS210 or TX210 device is bipolar. For example, the maximum
output voltage of the PDUS210-200 or TX210-200 is +/-100V. The PDUS210 and TX210 can also be
configured with a positive or negative unipolar output range using the order code suffix
–UnipolarPositive or –UnipolarNegative. For example, the order code PDUS210-200-UnipolarPositive
or TX210-200-UnipolarPositive would result in a maximum output voltage range of 0V to +200V, as
shown in Figure 2.
The unipolar option adds a DC offset voltage which is equal to half the signal amplitude; therefore,
the resulting voltage is always between zero volts and the chosen amplitude, as shown in
Figure 2. Compared to a fixed DC offset voltage, this approach minimizes the average DC voltage,
which improves transducer lifetime.
Since the output of the standard PDUS210 and TX210 is electrically isolated, the polarity of the offset
voltage can be inverted by reversing the connection of the transducer to the amplifier or transformer.
In other words, except for very specific applications where the phase of the output voltage is
important, the –UnipolarPositive option can be used to create both positive and negative offset
voltages by reversing the polarity of the transducer connection.
Positive Unipolar Option
Standard Bipolar Output
Negative Unipolar Option
Half Output
Full Output
Figure 2 Comparison of standard bipolar output voltage and unipolar output options.
PDUS210 V5 Manual
6
Modified 17/12/2022
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