Signaling device for a safety circuit

A signal device and safety circuit technology, applied in the direction of electrical signal transmission system, circuit, safety arrangement, etc., can solve the problems of limiting the maximum space allocation, series dead, etc., to achieve the effect of saving physical space and cost, and simplifying wiring

Active Publication Date: 2007-03-28
PILZ (COMPANY)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, the looping of the enable signal limits the maximum space allocation of series connected signaling devices
Also, from the point of view of the high-level safety controller, if one of the signaling devices suppresses the enable signal either due to a change of situation in the control unit (opening a safety door or whatnot) or due to an internally detected fault condition, the entire cascade is "dead"

Method used

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  • Signaling device for a safety circuit
  • Signaling device for a safety circuit
  • Signaling device for a safety circuit

Examples

Experimental program
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Embodiment Construction

[0042] In FIG. 1 , the device protected according to the invention is designated with the reference numeral 10 in its entirety.

[0043] In this embodiment, the device 10 comprises a manipulator 12 whose automatic operation poses a danger to persons (not shown here) in the area of ​​its movement. The movement area of ​​the manipulator 12 is thus protected by safety gates 14 and safety barriers, which are known per se. The safety gate 14 has a control unit 16 mounted thereon. On a fixed frame there is a safety switch 18 against which when the safety door is closed, said safety switch 18 is more generally the fixed part of the signaling device according to the invention. The safety switch 18 is connected to the safety controller 20 through a plurality of lines. The output of the safety controller 20 controls two contactors 22 , 24 whose contacts interrupt the power supply 26 to the manipulator 12 .

[0044] Device 10 is shown here in simplified form. As is known to those ski...

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PUM

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Abstract

A signaling device for a protective circuit is provided with an input part (52) for receiving an external state variable, with at least one circuit element (34, 36) and one control part (30, 32). Said control part (30, 32) is adapted to control the at least one circuit element (34, 36), depending on the external state variable, in such a manner that a signal applied to the input (38) is switched through to the output (42). According to an embodiment of the invention, the input (38) of the circuit element (34, 36) is internally subjected to a permanent potential, preferably a permanent high potential. In a protective circuit for switching off a hazardous installation the aforementioned signaling devices are connected in series to a safety control device. The control part of the second signal device (18b) controls the circuit elements associated therewith also depending on the first signal device.

Description

technical field [0001] The invention relates to a signaling device (other names: inductor, signal generator) for a safety circuit, said signaling device comprising an input part for receiving an external state variable, comprising at least one switching unit with an input and an output , and comprising a control section designed to control said at least one switching unit depending on said external variable, such that a signal applied to the input is transmitted to the output. [0002] The invention also relates to a safety device for safely shutting down a hazardous device, said safety device comprising a safety controller designed to shut down said hazardous device in a fail-safe manner, and comprising devices of the above-mentioned type connected in series with each other A first and at least one second signaling device of the safety controller. Background technique [0003] Such a signaling device and such a safety circuit are known from EP 1363306 A2. [0004] The ope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H47/00G05B9/02G05B9/03G05B19/045G05B23/02G08C13/00G08C19/16
CPCG05B9/02G05B9/03H01H47/004
Inventor J·普尔曼C·青泽尔G·霍尔农J·弗来那
Owner PILZ (COMPANY)
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