Supply

Mains supply

Note

No upstream transformers!

The KL2751 and KL2761 dimmer terminals are intended for direct operation on mains supplies (230 V_AC) without upstream transformer.
Overly large inductances in the supply line to the dimmer terminal will lead to its destruction in the event of a short circuit!
Automatic load detection does not operate reliably with an upstream transformer.

Power feed terminals
It is imperative that you use a power feed terminal (e.g.: KL9150, KL9160, KL9250, KL9260) designed for 230 V_AC to input mains voltage into the power contacts of the dimmer terminals
KL2751-0000, KL2761-0000,
KS2751-0000, KS2761-0000!
See application example for KL2751-0000.

The supply in of mains voltage without a power feed terminal is permissible only for dimmer terminals without power contacts:
KL2751-0011, KL2761-0011, KS2751-0011, KS2761-0011!
See application example for KL2751-0011.

Minimum interruption of the mains voltage supply
Any interruption in the mains voltage supply to the dimmer terminal may not be shorter than 3 seconds (e.g. an automatic circuit-breaker switching off and on again)!
In the case of shorter interruptions the dimmer does not lose its mains synchronization and can (depending on the starting edge) operate the load for a short while with the wrong type of control. In the case of operation of wound transformers this can lead to the destruction of the dimmer terminal!

Ripple control pulses

	Malfunction due to ripple control pulses External ripple control pulses on the mains supply can cause brightness fluctuations. Ripple control pulses with higher amplitudes can trigger the dimmer terminal's short circuit detection. The dimmer terminal then switches the load off and ramps up again. The light is switched off for several seconds. Use audio frequency filters in the supply line to the dimmer terminal in order to avoid these effects.