Installation; Recommendations For Installing The Knx; Electric Connections - Gewiss GW 90 764 Handbuch

ATTENTION: the device must only be installed by qualified personnel, observing
current regulations and the guidelines for KNX installations.

Recommendations for installing the KNX

1. The length of the BUS line between the dimmer actuator and the power supply unit must not exceed
350 metres.
2. The length of the BUS line between the dimmer actuator and the furthest KNX device must not
exceed 700 metres.
3. To avoid unwanted signals and overvoltages, do not use ring circuits.
4. Keep a distance of at least 4mm between the individually insulated cables of the BUS line and
those of the electricity line (figure C
5. Do not damage the electrical continuity conductor of the shielding (figure D
ATTENTION: the unused BUS signal cables, and the electrical continuity conductor,
must never touch any live elements or the earthing conductor!
Assemble the dimmer on a 35mm DIN rail in the following way (figure E
1. Insert the upper device coupling in the DIN rail.
2. Rotate the device, then lock it in place on the DIN rail by means of the fixing tab.
ATTENTION: disconnect the mains voltage before connecting the device to the
electricity supply!
Figure B
shows a diagram of the electrical connections.
1. Connect the red wire of the BUS cable to the red clamp (+) of the terminal, and the black wire
to the black clamp (-). Up to 4 BUS lines can be connected to the BUS terminal (same
coloured wires on the same terminal) (figure F
2. Insulate the shield, the electrical continuity conductor, and the other white and yellow wires of
the BUS cable (if a 4-conductor BUS cable is being used), that are not necessary (figure D
3. Insert the BUS clamp in the pins of the device. The correct connection direction is determined
by the fixing rails. Insulate the BUS terminal with the special cover, that must be screwed
onto the device. The cover guarantees the minimum separation distance of 4mm between
the power cables and the BUS cables (figure G
4.
Connect the load to the relevant screw terminals underneath the actuator, making sure the current limits
specified in the Technical Data are not exceeded.

INSTALLATION

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Assembly on the DIN rail

Electric connections

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