A safety chain device includes a safety chain including a plurality of protective switches connected in series, each of the protective switches is configured to switch from a first state to a second state in the event of abnormal operation of a respective corresponding drive chain; a resistive network encoder having a plurality of encoder output values, each of the encoder output values corresponds to one of combinations of states of the plurality of protective switches; a processor coupled with the resistive network encoder and configured to output a level signal corresponding to the encoder output values; a first controlled current source coupled with the safety chain and configured to output a first current corresponding to a current flowing through the safety chain; and a second controlled current source coupled with the processor and configured to output a second current corresponding to the level signal.
SAFETY CHAIN DEVICE AND SAFETY PROTECTION SYSTEM FOR ESCALATOR
2023-10-05
Patent
Electronic Resource
English
IPC: | B66B Aufzüge , ELEVATORS |
SAFETY CHAIN DEVICE AND SAFETY PROTECTION SYSTEM FOR ESCALATOR
European Patent Office | 2023
|Safety chain device and safety protection system for escalator
European Patent Office | 2023
|