R091 is a converter which acts as a Modbus TCP server (accepts Modbus TCP commands) and web server, and controls a DALI (Digital Addressable Light Interface) bus with up to 64 DALI devices. R091 is a DALI multi-master and can also provide power supply for the DALI bus. It also incorporates a web interface for manual entering of DALI commands including bus configuration and diagnostics commands. The R091 fully covers the functionality of previous types M090 and R090 and now supports standard DALI v2.
R091 acts as a DALI bus multi-master controller (according to EN 60929 ed. 4:2011 Annex E, static priority 4, setting time 16 ms, retry timeout 300 ms), and provides the power supply for the bus. The Modbus and web commands are translated into DALI protocol telegrams and sent to the DALI devices. It supports broadcasts, individual control, groups and scenes. The telegrams from DALI input and control devices are translated back to Modbus registers and available at the corresponding addresses, see tables in data sheet. Another way is to use CGI commands where all web functions may be also communicated to the device as CGI requests. The converter is powered either by 24 AC/DC or over PoE (Power over Ethernet).
See attached spec. sheet.