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Current output type safe isolated gate

A safety isolation and current-type technology, applied in the direction of measuring electricity, emergency protection circuit devices for limiting overcurrent/overvoltage, electrical components, etc., can solve the risk, safety zone and danger of increasing the energy of the safety circuit beyond the safe range In order to reduce the risk of energy exceeding the safe range and other issues such as the increase of coupling channels in the

Active Publication Date: 2014-01-01
ZHEJIANG SUPCON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the above two methods, it is necessary to add an additional optocoupler as an isolation device to realize the connection between the safe area and the dangerous area, so that the disconnection detection and alarm circuit is a separate signal transmission loop, which will directly lead to the safety area and the dangerous area. The number of coupling channels in the hazardous area increases greatly, which greatly increases the risk that the energy supplied to the intrinsically safe circuit exceeds the safe range

Method used

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  • Current output type safe isolated gate
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  • Current output type safe isolated gate

Examples

Experimental program
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Effect test

Embodiment 1

[0051] Please refer to the attached figure 1 , is a schematic structural diagram of a current output type safety isolation barrier disclosed in the present invention.

[0052] The current output type safety isolation barrier is composed of a power supply area 10 , a safe area 11 , a dangerous area 12 , an input end 13 and an output end 14 . The connection relationship is as follows:

[0053] The input terminal 13 is connected with the control system, and is used for obtaining a current-type standard industrial signal, and inputting the current-type standard industrial signal into the safe area 11 .

[0054] It should be noted that the power supply area 10, the safety area 11 and the danger area 12 of the current output type safety isolation barrier disclosed in this embodiment are completely isolated electrically, and the input terminal 13 is obtained from the control system (such as DCS) The control signal is a current-type standard industrial signal of 4-20mA. The current-...

Embodiment 2

[0062] Please refer to the attached figure 2 , is a schematic structural diagram of another current output type safety isolation barrier disclosed in the embodiment of the present invention. The current output type safety isolation barrier is specifically composed of a power supply area 10, a safety area 11, a danger area 12, an input terminal 13 and an output terminal 14 composition. Wherein, the safe area 11 includes the disconnection detection alarm unit 110 and the primary side of the isolation transformer 15; the dangerous area 12 includes the energy limiting unit 120, the current replication unit 121 and the secondary side of the isolation transformer 15;

[0063] The connection relationship is as follows:

[0064] The input terminal 13 is connected with the control system, and is used for obtaining a current-type standard industrial signal, and inputting the current-type standard industrial signal into the safe area 11 .

[0065] It should be noted that the power sup...

Embodiment 3

[0097] Please refer to the attached image 3 , is a schematic structural diagram of another current output type safety isolation barrier disclosed in the embodiment of the present invention. The current output type safety isolation barrier is specifically composed of a power supply area 10, a safety area 11, a danger area 12, an input terminal 13 and an output terminal 14 composition. Wherein, the safe area 11 includes the disconnection detection alarm unit 110 and the primary side of the isolation transformer 15; the dangerous area 12 includes the energy limiting unit 120, the current replication unit 121 and the secondary side of the isolation transformer 15;

[0098] The connection relationship is as follows:

[0099] The input terminal 13 is connected with the control system, and is used for obtaining a current-type standard industrial signal, and inputting the current-type standard industrial signal into the safe area 11 .

[0100] It should be noted that the power supp...

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PUM

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Abstract

The invention discloses a current output type safe isolated gate which comprises a power supply area, a safety area, a danger area, an input end and an output end, wherein the power supply area, the safety area and the danger area are mutually isolated; the input end is connected with a control system, is used for acquiring a current type standard industrial signal and inputs the current type standard industrial signal to the safety area; the power supply area is used for generating an isolating power supply supplied to the safety area and the danger area; the safety area and the danger area are isolated through an isolation transformer; the output end is connected with an actuator and used for transmitting output current to the actuator. The current output type safe isolated gate disclosed by the invention realizes the connection of the safety area and the danger area by using the isolation transformer as an isolation device, thereby realizing the disconnection detection and the alarm in the safety area without forming a signal coupling channel which passes through the safety area and the danger area and further reducing the risk that the energy supplied to an intrinsic safety circuit exceeds a safety range.

Description

technical field [0001] The invention relates to the fields of automation and instrumentation, and more specifically relates to a current output type safety isolation barrier. Background technique [0002] The safety isolation barrier is a device connected between the intrinsically safe circuit and the non-intrinsically safe circuit to limit the energy supplied to the intrinsically safe circuit within a certain safe range. Among them, the intrinsically safe circuit is connected to the dangerous area, and the non-intrinsically safe circuit is connected to the safe area. The control system is included in the non-intrinsically safe circuit, and the actuator is included in the intrinsically safe circuit. [0003] The current output type safety isolation barrier is a device that transmits the current type standard industrial signal (4~20mA) of the control system to the actuator (such as a valve). It is mainly designed according to the three-area isolation mode of power supply ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/02G01R31/02
Inventor 陈宇王文辉段汝良
Owner ZHEJIANG SUPCON TECH