Description of the question


Another method for connecting the TEDS chip would be the so-called zero-wire configuration. This circuitry does not require additional cables, just like the class 1 sensors. In this method, the TEDS module is installed with a tiny connection between the voltage supply and the sense line of the measuring bridge as shown in the illustration below.




The question is if it is possible to use and establish a parallel connection between our sense leads and pins 4 and 9 (cross-wiring) on the STG input, and retrieve the TEDS data from this particular sensor.


Description of the solution


For now, zero-wire TEDS is NOT directly supported by Dewesoft hardware capabilities or software.


However, if TEDS IC chip is accessible in this form, then the data could be read and duplicated/copied into Class 2 TEDS.


Full integrated zero-wire TEDS transducer data can currently be read by equipment capable of interfacing zero-wire TEDS, and then copied to Class 2 TEDS supported by DEWESoft.


TEDS Class 1, 2, zero-wire

  • Class 1 connections are mostly used for IEPE transducers, DEWESoft supports this type on ACC and CHG amplifiers.
  • Class 2 connections is most common on DEWESoft STG type amplifiers.
  • Zero-wire (usen on some HBM / HBK  transducers) is not supported in DEWESoft.


The IEEE1451.4 standard is currently under revision. The zero wire technology will become part of the new version and will be available for use by any manufacturer license-free.


Additional information