ABB Busch-Dimmer 6593 U-500 Manual Del Usuario página 47

Installation ENG 47
23 Installation
Supply and Load Connection
The supply is connected to the terminals L and N.
The load is connected to one of the terminals
(controlled outputs).
Connection to terminal N is an option and serves for
reducing the noise on the transformer load when switched
off.
Extensions
Any number of pushbuttons (e.g., 2020) can be connected
in parallel to allow switching and dimming via pushbutton
input terminal 1. Pushbutton control is either back-to-back
with L.