An illustrative example embodiment of a switch monitoring device (30) includes a controller (42) configured to command a switch (38, 40) to enter at least one of a conducting state and a non-conducting state. A monitoring circuit (46) conducts current when the switch (38, 40) is in the conducting state. A comparator (48) provides an output indicating a relationship between a voltage of a selected portion of the monitoring circuit (46) and a threshold voltage (52). The controller (42) determines a condition of the switch (38, 40) based on the output of the comparator (48) and the command.
ELEVATOR SWITCH MONITORING DEVICE
AUFZUGSSCHALTERÜBERWACHUNGSVORRICHTUNG
DISPOSITIF DE SURVEILLANCE DE COMMUTATEURS D'ASCENSEURS
2022-08-03
Patent
Elektronische Ressource
Englisch
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