ABB AG-102-500 Manuel D'instructions page 40

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Important Information GB
as actuator 6972 AG-102-500) with incandescent lamps, the instructions of the
lamp/electronic control gear manufacturer regarding making current and power
factor must be adhered to.
The Powernet EIB can also be connected to a different phase than the power
supply of the device. In this case, care must be taken when working on the
installation that all poles are disconnected.
ATTENTION
The pushbutton input must be connected to the same phase as the power
supply of the device.
The maximum length of the pushbutton line must not exceed 100 m. Use
only pushbuttons without contact-parallel lighting.
In order to prevent ripple voltage, the connected line must be laid separately
to the pushbutton line.