Transducers with Frequency Output

Technical Data

Accurancy of the Frequency Output

Basic error of max. 0.2% (incl. transmission error, calibration error and drift between 20-30°C). On delivery, the outputs of the measurement transducers are set to 5 kHz (max. 0.2% error). The calibration can alter slightly when the range is switched (SMD switches), switching error typ. 1% (max. 4% for 100, 200, 400 and 800 Hz).

Input/Measurement Range

• The input stage (connections, technical data) of the frequency output modules is identical to that of the basis modules with voltage output.
• Basis module with fixed range: most measurement ranges are available (specify when ordering), for more information see the documentation for the corresponding basis module.
• Programmable basis module: measurement range and zero point selectable by switches, (intermediate values set using a potentiometer), for more information see the documentation for the corresponding basis module.

Power Supply

The power supply for this module is the same as for the basis module, current consumption is around 20 mA greater. Bipolar power supply is not possible. A galvanically isolated power supply is available as an option (uses DC-DC converter). 3 port isolation is thus achieved (not suitable for mains voltages).

Frequency Output

Square impulses, amplitude determined by the voltage at input 3 (enable). The output impedance is around 600 Ohm (protection against short circuits and interference voltages). When the load resistance is 1 kOhm, a voltage splitter arises (600 Ohm/1 kOhm), which correspondingly reduces the voltage amplitude (to approx. 15 V for 24 V at the enable input). The galvanically isolated output stage eliminates earth loops and varying ground potentials. It is NOT suitable for mains voltages (max. 60 V). See the operating instructions for more information.

Frequency Range

The output frequency varies between 0 Hz and the max. output frequency, according to the magnitude of the input. In the programmable version (option), the maximum output frequency can be set via switches, in steps of 100 Hz (up to a max. of 20 kHz)

Options

• DC-DC converter (built into the module) for galvanic isolation of the 24 V power supply, test voltage of 700 V, max. operating voltage 60 V.
• Programmable cut-off switch (built into module) for monitoring, control.
• Other dimensions (ranges, input, output, time behaviour).