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Electrical or electronic safety circuits

An electronic safety and electrical technology, applied in the field of electrical or electronic safety circuits, can solve problems such as power limitation

Inactive Publication Date: 2017-05-24
ENDRESS HAUSER GMBH CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above-described methods of limiting the surface temperature have in principle the disadvantage that the power of the individual components or areas must be strongly limited as a function of the upstream or current-limiting resistors

Method used

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  • Electrical or electronic safety circuits
  • Electrical or electronic safety circuits
  • Electrical or electronic safety circuits

Examples

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Embodiment Construction

[0036] figure 1 A schematic representation of the filling level measuring device 6 is shown, in which case the solution of the invention is preferably applied. The filling material 2 is stored in the container 1. The propagation time method is used to confirm the filling level 3 of the filling substance 2 in the container 1 by means of the filling level measuring device 6. In the illustrated situation, the antenna unit 10 with the signal generation unit, the transmission unit and the reception unit is spatially separated from the control / evaluation unit 9. The data exchange and current supply between the high-frequency module 12 that generates signals on the one hand and the sensor electronics 9 on the other hand take place via the connecting lines 7 and 8. Of course, with regard to the present invention, a compact device can also be applied as the filling level measuring device 6.

[0037] The antenna unit 10 is installed in the opening 5 in the cover 4 of the container 1. V...

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Abstract

The invention relates to a time-triggered crowbar (11) designed in such a way that it monitors the switch-on time (t) and the timing period (T) of at least one downstream electronic component (12) and thus monitors the power supply , such that a predetermined maximum permissible surface temperature of the at least one downstream component (12) in the explosion-endangered area is not exceeded.

Description

Technical field [0001] The present invention relates to an electrical or electronic safety circuit that is connected via at least one supply line to at least one component connected downstream in an explosion-endangered area and is passed as an ignition protection type required in the explosion-endangered area The function monitors the power supplied via the supply line to protect such a component, wherein the at least one downstream component is operated by timing in such a way that its on time is less than the timing period. Background technique [0002] Especially in the field of automation technology, regardless of factory or process automation technology, the ignition protection type of devices installed in explosion-endangered areas plays an important role. The type of ignition protection should exclude the risk of ignition sources that can trigger an explosion in an explosive or explosion-endangered environment. The type of ignition protection used in measurement and auto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F15/06G01F23/00G01F23/284
CPCG01F15/06G01F23/284G01F23/80H02H9/008
Inventor 罗兰·格罗青格得特勒夫·拉明
Owner ENDRESS HAUSER GMBH CO KG
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