Mounting and wiring
KL2751/KS2751, KL2761/KS2761
22
Version: 3.1.0
Power feed terminal
It is imperative that you use a power feed terminal (e.g.: KL9150, KL9160, KL9250, KL9260) designed for
230 V
AC
to supply mains voltage (230 V
AC
) into the power contacts!
Attention
Risk of damage to the device!
Bus Couplers, Bus Terminal controllers and power supply terminals for 24 V are not suit-
able for the supply of mains voltage into the power contacts! They are designed only for
voltages up to 24 V and would be destroyed if 230 V
AC
is applied at their power contacts!
Several dimmer terminals can be operated on one power feed terminal.
Note
Separation terminal
If 24 V and 230 V
AC
are to be used on the power contacts in a Bus Terminal block, the
KL9080 separation terminal can be used in order to clearly separate the potential blocks
visually from each other.
Short-circuit limitation
The dimmer terminals are equipped with short-circuit current limitation. The current is limited to approx. 10 A
to 15 A. Normally triggering of the fuse is therefore prevented.
The short circuit current flows for less than 0.5 ms and is switched on automatically. After a short circuit was
detected the KL2751 tries to switch the system on again and tests the line with a low voltage. If the short
circuit has been eliminated, the dimmer terminal returns to the previous dimmer value.
A short circuit on the line should always be avoided and never deliberately caused! The components in the
dimmer terminal are stressed by short circuits. A large number of short circuits will shorten the service life of
the dimmer terminal!
Fuses
The dimmer terminal may be protected with fuses up to 10 A.
The dimmer terminal protects itself against destruction due to short circuit and overload. This built-in
protection acts on the connection line between dimmer terminal and load in the event of a short circuit.
Attention
Risk of damage to the device!
However, overload protection must still be provided. The fine-wire fuse often used in de-
vices with transformers must not be bridged or changed in its value. This could lead to
overheating of the transformer.