DALI/DALI 2 multi-master and power supply terminal KL6821
Input 2
Receive LED
Error LED 2
Input 1 
+24 V Power LED 
Send LED 
Run LED 
+24 V
Input 1
0 V
Input 2
Top view 
Contact assembly 
extended shock and vibration range 25g

KL6821 | DALI/DALI 2 multi-master and power supply terminal

The KL6821 enables the connection of up to 64 DALI/DALI 2 slaves and 64 DALI input devices. The KS2000 software enables simple configuration via a PC that is directly coupled with the Bus Coupler via an RS232 interface or via the fieldbus. The integrated power supply unit generates an electrically isolated 24 V DC output voltage. No further components are required for the operation of the DALI/DALI 2 devices. The KL6821 operates fieldbus-independent.

Technical data KL6821
Technology DALI/DALI 2
Number of channels 1
Slaves/groups max. 64 DALI/DALI 2 slaves and 64 DALI input devices; max. 16 groups
Data transfer channels 1
Data transfer standard DALI + DALI 2
Data transfer rates 1200 baud
Current consumption K-bus typ. 55 mA
Short-circuit proof yes
Electrical isolation 500 V (K-bus/DALI-bus)
Bit width in the process image input/output: 4 x 8 bit user data, 1 x 8 bit control/status (up to 5 x 8 bit user data are possible)
Configuration via the Bus Coupler or the controller
Nominal voltage 24 V DC (-15 %/+20 %)
Input voltage 24 V DC (-15 %/+20 %)
Insulation voltage DALI-bus/K-bus: 1,500 V DC,
DALI-bus/power contacts: 1,500 V DC
DALI power supply max. 250 mA
Surge voltage resistance constant load 275 V ACrms
Special features 2 digital inputs for simplified installation; TwinCAT library: TwinCAT PLC DALI
Weight approx. 80 g
Operating/storage temperature 0…+55 °C/-25…+85 °C
Relative humidity 95 %, no condensation
Vibration/shock resistance conforms to EN 60068-2-6/EN 60068-2-27
EMC immunity/emission conforms to EN 61000-6-2/EN 61000-6-4
Protect. class/installation pos. IP 20/variable
Approvals/markings CE
subsystem For further subsystem products please see the system overview.