Safety device, valve device and method

By introducing current limiting elements into safety equipment, the problem of transmission units being susceptible to excessive voltage or current is solved, the safety and troubleshooting capabilities of the equipment are improved, and the stability of current isolation is ensured.

CN114110233BActive Publication Date: 2025-07-22FESTO AG & CO KG
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Patent Information

Application Number
CN202011433116.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2020-08-28
Filing Date
2020-12-10
Publication Date
2025-07-22
Estimated Expiration
2040-12-10

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Abstract

The present invention relates to a safety device (10, 30, 40, 50) for industrial automation, in particular a safety control device and / or a safety diagnostic device, the safety device comprising: a logic voltage region (4); a load voltage region (5) that is galvanically isolated from the logic voltage region (4); a transmission unit (6) for transmitting communication signals between the logic voltage region (4) and the load voltage region (5) while maintaining the galvanic isolation; a first voltage supply connection (7) for supplying a first supply voltage (V1) to the logic voltage region (4); and a first current-limiting element (8), wherein the transmission unit (6) is connected to the first voltage supply connection (7) via the first current-limiting element (8) and is fed by the first voltage supply connection (7) via the first current-limiting element (8).
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Citation Information

Patent Citations

  • Relay circuit means for controlling the application of AC power to a load using a relay with arc suppression circuitry

    US6621668B1

  • Pager-based gas valve controller

    WO2002025612A1