CN2261051Y - Small pinboard-type field power-supply signal isolation safety keeper - Google Patents
Small pinboard-type field power-supply signal isolation safety keeper Download PDFInfo
- Publication number
- CN2261051Y CN2261051Y CN 96233597 CN96233597U CN2261051Y CN 2261051 Y CN2261051 Y CN 2261051Y CN 96233597 CN96233597 CN 96233597 CN 96233597 U CN96233597 U CN 96233597U CN 2261051 Y CN2261051 Y CN 2261051Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- moulding board
- distribution
- master module
- utility
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Connections Arranged To Contact A Plurality Of Conductors (AREA)
Abstract
The utility model relates to a small-sized plug-in type safety keeper for the isolation of power supply signals, which is composed of a display panel, a main moulding board, a casing, a plug, an auxiliary moulding board, a socket, wire connecting terminals and a standard lead rail. The utility model is characterized in that the auxiliary moulding board is a power distribution safety fence moulding board of which a circuit is connected in parallel to the input terminal of a circuit of the main moulding board, and the circuit of the auxiliary moulding board and the circuit of the main moulding board form a safety keeping circuit for the isolation of signals. The model utility has the advantages of small size and light weight, and the working conditions of an instrument can be observed at any time; besides, the inflammable and explosive problems of dangerous sites can be solved, and voltage limitation and current limitation are carried out to distribution voltage; the utility model has highly integrated circuits, and is stable, reliable, simple and practical.
Description
The utility model relates to a kind ofly provides insulating power supply with on-the-spot two-wire system transformer, limit dangerous energy simultaneously and seal in the hazardous area, and 4～20mADC conversion of signals that two-wire system transformer is sent here is become 1～5VDC (or 4～20mADC) signal output of isolating with it from the intrinsic safety terminal; Or self tuning regulator (or manipulater) 4～20mADC signal is exported to current to pneumatic converter or electricity/pneumatic valve positioner after isolating in the future, limits dangerous energy seals in the hazardous area from the intrinsic safety terminal small-sized plug-in instrument simultaneously.
At present, the greatest problem that frame dress safety barrier exists is that volume is big, and the structure heaviness is installed the wiring complexity, uses inconvenient.Because board area is big, current sinking is big; Structure adopts frame carried type, wasting space and starting material; Take the front terminal wiring, be unfavorable for safeguarding and be connected that production efficiency is low.In addition, instrument non-transformer pilot lamp, insurance pilot lamp, output indicator and power switch use, safeguard, maintenance, debugging be all very inconvenient, when especially one group of instrument is worked simultaneously, find out problem, and very difficulty just removes barriers.Chinese patent 94229785.7 discloses a kind of " small-sized plug-in channel signal is handled instrument ".It is small and light skilful volume that this patent changes the big and heavy volume of similar instrument, change Wiring type and be connected to standard guide rail plug-in mounting, changing support is mounting guide rail and socket, simultaneously, on instrument, be provided with display panel, therefore, not only volume is little for it, in light weight, easy for assembly, disassembly and maintenance, and be convenient to observe at any time the working condition of instrument.When especially one group of instrument is worked simultaneously, can rapidly I go out out of order instrument, the weak point of this patent is, what auxiliary template adopted is the distribution template, and it is not provided with pressure limiting, current-limiting protection circuit, therefore, can not use in inflammable, explosive hazardous area.
The purpose of this utility model provides a kind of small-sized plug-in field power supply Signal Spacing safety retainer, not only volume is little, in light weight for it, Installation and Debugging convenient, can observe the working condition of instrument at any time, and can solve inflammable, the explosive problem of hazardous area, instrument can normally be used in the hazardous area.
The purpose of this utility model is achieved in that in comprising the small-sized plug-in instrument of display panel, master module, casing, plug, auxiliary template, socket, connection terminal and standard guide rail, changing the distribution template is distribution, safety barrier template, its structural feature is: auxiliary template is distribution, safety barrier template, this template circuit is connected in parallel on the input end of master module circuit, it is made up of three terminal regulator, sample resistance and restricting circuits, and wherein three terminal regulator is connected with restricting circuits; Distribution voltage signal when master module provides after the three terminal regulator voltage stabilizing, carries out voltage limit and electric current restriction by restricting circuits again, make it reach the requirement of essential safety electric signal, simultaneously, be connected to sample resistance, for master module provides input voltage signal at the distribution output terminal.
The utility model is on the basis of the basic structure that keeps Chinese patent 94229785.7 " small-sized plug-in channel signal is handled instrument "; only the power distribution circuit with auxiliary template changes distribution, safety barrier circuit into; therefore; it both had the advantage of " small-sized plug-in channel signal is handled instrument "; can carry out pressure limiting, current limliting to distribution voltage again, make circuit from playing a protective role in essence.
Adopt such scheme, volume is little, and is in light weight, and installation, debugging, easy to maintenance can be observed the duty of instrument at any time, are convenient to discover problems and solve them immediately.In addition, can carry out pressure limiting, current limliting to distribution voltage, and this circuit level height, reliable and stable, simple and practical.
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a structural drawing of the present utility model;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the circuit diagram of Fig. 1.
As shown in Figure 1: the utility model is made up of display panel 1, master module 2, casing 3, plug 4, auxiliary template 5, socket 6, connection terminal 7 and standard guide rail 8, wherein display panel 1 is positioned at the top of casing 3, plug 4 is positioned at the below of casing 3, and master module 3 and auxiliary template 5 are arranged in casing 3; The instrument volume that is made of panel 1, casing 3, plug 4 is 48 * 48 * 74 (mm
3), the plug 4 of instrument is inserted on the socket 6, and connection terminal 7 is arranged on socket 6, and socket 6 is installed on the standard guide rail 8.
As shown in Figure 2: power light (POWER), insurance pilot lamp (FUSE), switch (ON/OFF) and output indicator (OUT) are arranged on display panel 1.
In Fig. 3, auxiliary template is distribution, safety barrier template, and this template circuit is connected in parallel on the input end of master module circuit, and it is by three terminal regulator D
1, sample resistance R
9With restricting circuits T
1～T
8Form, wherein three terminal regulator D
1With restricting circuits T
1～T
8Series connection; The distribution voltage signal that provides when master module 2 is through three terminal regulator D
1After the voltage stabilizing, again by restricting circuits T
1～T
8Carry out the restriction of voltage limit and electric current, make its requirement that reaches the essential safety electric signal, simultaneously, be serially connected with sample resistance R at the distribution output terminal
9, for master module 2 provides input voltage signal.The auxiliary template circuit is connected in parallel on the signal amplifier A of master module circuit
2Input end, it constitutes Signal Spacing safety holding circuit with the master module circuit.The master module circuit is by signal amplification circuit A
2, electromagnetic isolation coil B
1, B
2, level shift circuit A
3, oscillatory circuit T
9, T
12With holding circuit T
13～T
16And output indicating circuit D
6, power indicating circuit D
2, protection indicating circuit D
3Deng composition.When switch 2 closures, oscillatory circuit T
9, T
12Start working solenoid B
2Start working, instrument enters duty.
The N of master module
2The distribution voltage signal that provides is through D
1Behind the three terminal regulator, again via T
1～T
8The signal limitations circuit of forming carries out voltage limit and electric current restriction to its distribution voltage that provides, and makes its requirement that reaches the essential safety electric signal, simultaneously, is connected to the sample of signal resistance R at the distribution output terminal
9, for master module provides input voltage signal 0.2～1V.
Master module input voltage signal 0.2～1V through A
2And peripheral 5 times of voltage signals that are enlarged into 1～5V, the P of carrying out
19, D
13Limit feedback, driving signal retarder B
1Carry out electromagnetic isolation, enter level shift circuit, pass through D
12The stream that shakes passes through operational amplifier A again
3With triode T
10Carry out level shift, the voltage signal of output 4～2OmADC and 1～5V.In conjunction with shown in Figure 2, as output terminal I
0, V
0Between when being connected to load, circuit turn-on produces loop current, through light emitting diode D
6The back is to ground, and the output indicator (OUT) on the display panel 1 is bright at this moment, and showing has signal output; After mu balanced circuit provides a 24V voltage, through light emitting diode O
3Conducting, (POWER) is bright for the power light on the display panel 1, and showing has electric current to pass through; Behind power connection, by T
13～T
16Form power protecting circuit work,, then protect pilot lamp D when supply voltage overvoltage and gauge internal short circuit cause overcurrent
2Bright, promptly the insurance pilot lamp (FUSE) on the display panel 1 is bright, show and should keep in repair, when instrumentation just often, protection pilot lamp D
2Extinguish.
Claims (1)
1. field power supply Signal Spacing safety retainer, comprise panel (1), master module (2), casing (3), plug (4), auxiliary template (5), socket (6), connection terminal (7) and standard guide rail (8), it is characterized in that auxiliary template (5) is distribution, safety barrier template, this template circuit is connected in parallel on the input end of master module circuit, and it is by three terminal regulator (D
1), sample resistance (R
9) and restricting circuits (T
1～T
8) form; Three terminal regulator (D wherein
1) and restricting circuits (T
1～T
8) series connection; The distribution voltage signal that provides when master module (2) is through three terminal regulator (D
1) after the voltage stabilizing, again by restricting circuits (T
1～T
8) carry out voltage limit and electric current restriction, make its requirement that reaches the essential safety electric signal, simultaneously, be serially connected with sample resistance R at the distribution output terminal
9, for master module (2) provides input voltage signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96233597 CN2261051Y (en) | 1996-08-16 | 1996-08-16 | Small pinboard-type field power-supply signal isolation safety keeper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96233597 CN2261051Y (en) | 1996-08-16 | 1996-08-16 | Small pinboard-type field power-supply signal isolation safety keeper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2261051Y true CN2261051Y (en) | 1997-08-27 |
Family
ID=33910235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96233597 Expired - Fee Related CN2261051Y (en) | 1996-08-16 | 1996-08-16 | Small pinboard-type field power-supply signal isolation safety keeper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2261051Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100478822C (en) * | 2005-08-17 | 2009-04-15 | 沈阳中科博微自动化技术有限公司 | FF field bus intrinsic safety barrier |
-
1996
- 1996-08-16 CN CN 96233597 patent/CN2261051Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100478822C (en) * | 2005-08-17 | 2009-04-15 | 沈阳中科博微自动化技术有限公司 | FF field bus intrinsic safety barrier |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |