公开(公告)号：US20210155455A1

公开(公告)日：2021-05-27

申请号：US16953475

申请日：2020-11-20

Applicant: Otis Elevator Company

Inventor： Peter Herkel ,  Norbert Diwisch

IPC: B66B5/00 ,  G01R31/327

Abstract: 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).

公开(公告)号：US11565911B2

公开(公告)日：2023-01-31

申请号：US16953475

申请日：2020-11-20

Applicant: Otis Elevator Company

Inventor： Peter Herkel ,  Norbert Diwisch

IPC: G01R31/327 ,  B66B5/00 ,  H01H9/00

Abstract: 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).