Modbus TCP/DALI multimaster converter - MIDAM CDALI01
Serial converter which acts as a Modbus TCP server (accepts Modbus TCP commands) and controls a DALI bus with up to 64 DALI enabled devices. This is the second generation multimaster converter harmonized according to EN60929 Edition 4: 2011 Annex E. CDALI01 provides the power supply for the DALI bus, can be powered over the Ethernet and features an integrated web interface for manual intervention of DALI commands or configuration and diagnostic.
- Operates as a Modbus TCP server
- Controls up to 64 DALI-enabled devices
- 2nd generation multimaster converter
- Provides power supply for the DALI bus
- Supports Power over Ethernet (PoE)
Function
CDALI01 acts as a DALI bus multimaster harmonized according to EN 60929 ed. 4:2011 Annex E, with static priority 4, setting time 16 ms and retry timeout of 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. The responses from the light controllers are translated back to Modbus registers and available at the corresponding addresses. It is also possible to use CGI commands, where all web functions can be communicated to the device as CGI requests too.
Application
- Direct DALI bus control
- DALI bus maintenance and configuration
- Web-based remote control of the DALI bus
- Wired integration into SCADA systems
Design notes
The DALI bus supports up to 64 light controller addresses, up to 16 scenes, and up to 16 groups. Wire length and diameter must always be respected! For the complete overview of the DALI bus specification, refer to http://www.dali-ag.org/ (DALI manual). The bus devices are connected over a 2-pole connector, regardless of polarity. The Ethernet is connected over RJ45 connector with PoE (Power over Ethernet) functionality.
Power supply
When specifying the DALI bus load, the amount and types of the DALI components must be considered in order not to exceed the standardized DALI bus power supply current. The DALI bus uses 22.5 V operation voltage. The device is overload sustainable to unlimited bus short-circuit. Using the single master topology, up to 64 control devices may be installed. It is recommended not to exceed a maximum total current multimaster bus load for all devices (incl. input devices and application controllers) of 240 mA. In any case, maximum current according to EN 62386-101 is guaranteed up to 250 mA. To learn about different power supply options please refer to the “Power supply alternatives” row in Technical data section further in this document.
Operation environment
If the bus is loaded, please allow proper heat dissipationt all around the module, especially when multiple of these are installed in a row on DIN rail. The heat is a consequence of frequent communication with high number of devices. Please do not exceed maximal permitted working temperature of 45 °C, otherwise the proper function can not be guaranteed or may result in device damage.