公开(公告)号：EP3703313A1

公开(公告)日：2020-09-02

申请号：EP20159625.1

申请日：2020-02-26

Applicant: Key Automation S.r.l.

Inventor： BATTISTUZZI, Angelo

IPC: H04L12/10

Abstract: An apparatus (1) for moving a closing barrier, in particular for moving a door or gate, comprises:
- a control station (10) for controlling the movement apparatus, said control station (10) comprising a supply circuit (100) for supplying a PWM supply voltage to a two-wire communication and supply bus (B) coupled to said control station (10); and
- at least one utilizer device (12) that uses said PWM supply voltage and is coupled to said two-wire communication bus (B), said utilizer device (12) comprising a conversion circuit (120) for converting said PWM supply voltage into a supply current for an electric motor (122) for movement of said closing barrier.
The control station (10) comprises an amplitude-modulation circuit (102) for transmitting an amplitude-modulated data communication signal superimposed on said PWM supply voltage onto said communication and supply bus (B), and the at least one utilizer device (12) that uses said PWM supply voltage is coupled to a circuit (124) for amplitude demodulation of said amplitude-modulated data communication signal for receiving signals from said communication and supply bus (B).