R091 DALI / Modbus TCP converter

DALI / Modbus TCP converter

To read and control DALI bus over Modbus TCP, extended web interface for commissioning of the DALI bus


R091 is a serial 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 multi master of the DALI bus (according to EN 60929 ed. 4:2011 Annex E), and provides the power supply for the 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.

  • integration of DALI light controllers to a Modbus TCP compatible SCADA or PLC
  • configuration and control of DALI bus over a comfortable web interface, even on a remote basis
  • DALI bus control over CGI commands

R091 acts as a DALI bus multimaster 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, see below. The Modbus and web commands are translated into DALI protocol telegrams and sent to the DALI devices. The responses from the light controllers are translated back to Modbus registers and available at the corresponding addresses, see tables below.

Another way is to use CGI commands where all web functions may be also communicated to the device as CGI requests.