Electronic test nodes for automatic check of a safety chain

An electronic test node (1) for a safety chain (22) in a passenger conveyor system includes an electrical connection (2) for an associated safety switch (4). A processor (6) is configured to monitor a signal carried by the electrical connection (2) so as to detect whether the associated safety switc...

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Bibliographische Detailangaben
Hauptverfasser:	Diwisch, Norbert, Herkel, Peter
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRIC SWITCHES ELECTRICITY ELEVATORS EMERGENCY PROTECTIVE DEVICES ESCALATORS OR MOVING WALKWAYS HAULING HOISTING LIFTING MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PERFORMING OPERATIONS PHYSICS RELAYS SELECTORS TESTING TRANSPORTING
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Beschreibung
Zusammenfassung:	An electronic test node (1) for a safety chain (22) in a passenger conveyor system includes an electrical connection (2) for an associated safety switch (4). A processor (6) is configured to monitor a signal carried by the electrical connection (2) so as to detect whether the associated safety switch (4) is open or closed. The electronic test node (1) further includes a test switch (8) connected in series with the electrical connection (2), wherein the processor (6) is configured to run a test by selectively opening the test switch (8) and monitoring for a change in the signal carried by the electrical connection (2).