The present invention discloses a safety electronic switch, comprising: a first terminal, a second terminal, a third terminal, a surge voltage suppression unit, a comparator, and a relay. The surge voltage suppression unit is connected to a safety circuit through the first terminal. The first terminal is provided with a live wire end and a neutral wire end. The surge voltage suppression unit is connected to the comparator. The comparator is connected to the relay. The relay is connected to the second terminal and the third terminal. The third terminal is connected to a low-voltage power supply. The third terminal is provided with a positive electrode and a negative electrode that are connected to the low-voltage power supply. In the present invention, a surge voltage suppression unit is used to enhance the anti-interference capability of an input terminal, thereby ensuring the reliability of operation in a complex electromagnetic environment. In addition, a threshold voltage is designed through the comparator, so as to reduce the influence of input voltage fluctuation on the circuit. The dual-channel output structure is adopted to meet the requirements of a functional safety level SIL3. PhotoMOS optoelectronic couplers are used, so that the requirements of safety electric isolation are satisfied.


    Access

    Download


    Export, share and cite



    Title :

    SAFETY ELECTRONIC SWITCH


    Additional title:

    ELEKTRONISCHER SICHERHEITSSCHALTER
    COMMUTATEUR ÉLECTRONIQUE DE SÉCURITÉ


    Contributors:
    MO LI (author) / LI ZHI JUN (author) / LIN WENFENG (author) / ZHU JINPENG (author)

    Publication date :

    2021-06-09


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / B66B Aufzüge , ELEVATORS / H03K PULSE TECHNIQUE , Impulstechnik



    Safety switch

    BOHN MATTHIAS | European Patent Office | 2024

    Free access

    SAFETY SWITCH

    FORD TIMOTHY D F / GASCON STEPHANE / ROUMELIOTIS STEVE | European Patent Office | 2019

    Free access

    SWITCH SAFETY DEVICE

    NELSON II WARREN CHRISTOPHER | European Patent Office | 2022

    Free access

    MANUAL SAFETY SWITCH FOR ELECTRIC RAILROAD SWITCH

    WANG ZHIWEN / LIU CHANG / PIAO SHENGBIN et al. | European Patent Office | 2021

    Free access

    Safety switch and switch machine with same

    LIU CHUNYANG / LI CHAO / ZHANG XUN et al. | European Patent Office | 2023

    Free access