Why does the SR1B201BD module and ZELIO SOFT2 fail to communicate, "com error"?

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This error is displayed because the software does not match the hardware used. In short, it is not possible to use Zelio Soft 1 programming software to program SR2** and SR3** relays, or Zelio Soft 2 to program SR1 relays.

The ZELIO range of programmable relays, part number SR 1**, are obsolete. Zelio Soft 1 software was used to program this range of relays. This software is also discontinued.

The ZELIO 2 range part numbers (SR2** (compact) and SR3** (modular)) replaced the old SR1 range and are still available. Zelio Soft 2 software is used to program this range of relays.