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Safety circuits for fail-safe switching off of dangerous technical equipment

A technology for safety circuits and technical equipment, applied in the direction of emergency protection circuit devices, circuits, safety arrangements, etc. for limiting overcurrent/overvoltage, and can solve problems such as high cost and high cost

Active Publication Date: 2022-06-07
PILZ (COMPANY)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is associated with relatively high costs and thus high fees

Method used

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  • Safety circuits for fail-safe switching off of dangerous technical equipment
  • Safety circuits for fail-safe switching off of dangerous technical equipment
  • Safety circuits for fail-safe switching off of dangerous technical equipment

Examples

Experimental program
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Embodiment Construction

[0028] refer to figure 1 , the safety circuit 1 is provided for fail-safe switching off of hazardous installations 3 with a number n≥2 switchable equipment components 4a, . Devices 2a, . . . , 2n. The safety switching devices 2a, . . . , 2n are preferably designed such that they meet the prerequisites for classification into category 4 (function class e) of the European standard EN ISO 13849-1-2009. Preferably, the number of safety switching devices 2a, . . . , 2n is equal to the number of equipment components 4a, . One each of the switching devices 2a, . . . , 2n. The individual safety switching devices 2 a , . . . , 2 n are connected in series with each other by means of connecting lines 5 . The safety circuit 1 preferably has a modular and scalable structure, so that the number n of the safety switching devices 2a, . . . , 2n can also be changed later in a simple manner. Due to the modular structure of the safety circuit 1 , each of the safety switching devices 2 a , . ...

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Abstract

The invention relates to a safety circuit for fail-safe switching off of dangerous technical equipment, which has a number n ≥ 2 switchable equipment components, the safety circuit comprising a plurality of safety switching devices, which are connected in communication with each other and have Fail-safe control units, wherein each fail-safe control unit is equipped with plant components and is configured to detect and analyze information about the current operating state of the plant components assigned to it, wherein the safety switching devices are connected in series and form a monitoring loop , in which case the monitoring current can flow through the safety switching device, the safety switching device comprising a through current changing device, which is arranged for changing the through current in the monitoring circuit if a safety request is detected by the safety switching device concerned ; The fail-safe control unit is configured to generate a cut-off signal when the passing current changes, which can cause the fail-safe cut-off of the non-cut-off equipment components connected to the fail-safe control unit.

Description

technical field [0001] The invention relates to a safety circuit for fail-safely cutting off dangerous technical equipment, the technical equipment having a number of n≥2 switchable equipment components, the safety circuit comprising a plurality of safety switch devices, the safety switches The devices are communicatively connected to each other and have each fail-safe control unit, wherein each of the fail-safe control units is provided with at least one of the aforementioned equipment components, and wherein each of the fail-safe control units is configured to, Information about the current operating state of the at least one plant component assigned to the fail-safe control unit is detected and analyzed. Background technique [0002] In modern technical plants, such as, for example, industrial production plants and production lines, transport and conveying plants, operating sequences are controlled to an increasing extent automatically. Such a plant has a central operati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B9/03
CPCG05B9/03G05B9/02H01H47/005H01H47/004H02H9/045
Inventor C·青泽尔
Owner PILZ (COMPANY)
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