1-channel AC motor speed controller 230 V AC, 200 VA KL2791
Error LED
Net OK 
Run LED 
Power contact
230 V
Power contact N
Power contact PE
Output 1
Output 1
230 V
Top view 
Contact assembly 

KL2791 | 1-channel AC motor speed controller 230 V AC, 200 VA

The KL2791 AC motor speed controller is designed for direct connection of different single-phase AC motors with small capacity. The KL2791 enables speed reduction of typical motors such as capacitor motors, universal motors and shaded-pole motors. The required output is specified via the process data. The output setting matches respective output value through targeted on and off switching at optimised times. This technique is particularly suitable for drives with quadratic load characteristic such as fans and pumps.

Technical data KL2791 | KS2791
Connection technology direct motor connection
Number of outputs 1 motor
Mains voltage 230 V AC
Rated output ≤ 200 VA
Load type 1-phase AC motors
Max. output current 0.9 A
Control type phase/full wave control
Resolution 1 %
Reverse voltage protection no
Electrical isolation 500 V (K-bus/field voltage), 3,750 V AC (1 min.)
Leakage current (OFF state) < 1 mA
Current consumption power contacts only load
Current consumpt. K-bus typ. 95 mA
Bit width in the process image output: 1 x 16 bit data (1 x 8 bit control/status optional)
Weight approx. 60 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/see documentation
Pluggable wiring for all KSxxxx Bus Terminals
Approvals CE
Special terminals
KL2791-0011 1-channel AC motor speed controller, 230 V AC, 200 VA, max. 0.9 A, without power contacts
KL2791-1200 1-channel AC motor speed controller, 120 V AC, 100 VA