HDL Buspro / KNX Interface Converter,
https://b2b.hdl-automation.cz/en/support/products/data-sheets/buspro/communication-gateways/hdl-mceib-231(sb-dn-eib)
https://b2b.hdl-automation.cz/en/support/products/data-sheets/buspro/communication-gateways/hdl-mceib-231(sb-dn-eib)