CN2084684U - Leakage compensator for electric signal switch - Google Patents
Leakage compensator for electric signal switch Download PDFInfo
- Publication number
- CN2084684U CN2084684U CN 90226463 CN90226463U CN2084684U CN 2084684 U CN2084684 U CN 2084684U CN 90226463 CN90226463 CN 90226463 CN 90226463 U CN90226463 U CN 90226463U CN 2084684 U CN2084684 U CN 2084684U
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- electric leakage
- switch
- input
- comparator
- driver
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Abstract
The utility model discloses an electricity leakage compensator for an electric signal switch, comprising an electricity leakage compensating circuit, or a plurality of electricity leakage compensating circuits. The electricity leakage compensating circuit is provided with a comparator 7, making electricity leakage voltage on a signal switch compare with threshold voltage Vr. Furthermore, the opening, and closing of the safety switch 10 is controlled by a driver, and thus, the electricity leakage signal is eliminated. The utility model has the advantages of safe operation, simple device, reliability, convenient use, etc.
Description
The utility model relate to a kind of to signaling switch in the electronic circuit because of the safety device that compensates of electric leakage that causes affected by environment.
Signaling switch in the existing electronic circuit, as supplying used travel switch of input signal or the like in all kinds of Programmable Logic Controllers on the automatic machine tool, they often are arranged on the relatively poor operation site of environment, influenced by surrounding atmosphere, can cause the switch electric leakage because of the cohesion of moisture and other pollutant especially, consequently cause distorted signals, break down.
In order to overcome the above-mentioned defective of prior art, the utility model has designed a kind of electric leakage compensation arrangement of signal of telecommunication switch.This electric leakage compensation arrangement comprises one or more compensator circuit of electric leakage (1), each compensator circuit of electric leakage has an electric leakage input (2), a common port (3), two compensate outputs (4 and 5) and reference voltage end external links such as (6), and are made up of " deflection machine " (7), " comparator " (8), " driver " (9) and " safety switch " all parts such as (10).Be connected a current-limiting resistance (11) with electric leakage between the input at reference voltage, two stiff ends of " deflection machine " connect reference voltage and common port respectively, the adjustable end (12) of " deflection machine " is connected with two inputs of " comparator " respectively with the electric leakage input, the output of " comparator " is connected to the input of " driver ", the output of " driver " is connected to the input of " safety switch ", with the switch link (4 and 5) of " safety switch " as two compensation outputs.Signaling switch (14) two ends of during use need being carried out safety allowance link to each other with electric leakage input and common port respectively, make an input of the electrical leakage voltage input " comparator " that between these two ends, produces, make the adjustable end and the voltage between the common port of " deflection machine " transfer to a threshold values Vr who presets again, the choosing of Vr value requires the small electric pressure drop that it produces because of contact resistance when closed greater than signaling switch, may produce the ohmically voltage drop of minimum leakage but be less than when signaling switch disconnects.Electrical leakage voltage and threshold voltage Vr on the signaling switch are compared by " comparator ".How positive and negative two inputs of " comparator " are connected respectively with above-mentioned two voltages, depend at signaling switch to disconnect and electrical leakage voltage during that the output of " comparator " always can make " safety switch " be in off-state equally by " driver " greater than Vr.Otherwise when signaling switch closure and electrical leakage voltage during less than Vr, the output of " comparator " will make " safety switch " same closed.Because " safety switch " itself is subjected to strict protection, it and environment completely cut off, and can not produce electric leakage because of moist or pollution.Be subjected to the control of compensator circuit of electric leakage, eliminated the electric leakage signal of signaling switch under off-state, two switch terminals of " safety switch " are only to be in " disconnection " and " closure " the two kinds of distinct states of keeping strokes with signaling switch between two of the compensator circuit of electric leakage compensation outputs (4 and 5).
Accompanying drawing is the circuit diagram of a two-way electric leakage of the utility model compensation arrangement embodiment.This embodiment does " safety switch " (10) with bidirectional triode thyristor optical coupling switch.The electric current on the former limit of optical coupling switch flows into end and connects reference voltage (6) through a current-limiting resistance (13), outflow end directly is connected with output end of driver, the electric leakage input inserts the anode of " comparator " (8), the adjustable end (12) of " deflection machine " inserts the negative terminal of " comparator ", and the common port (3) of electric leakage compensation arrangement Nei Gelu all interconnects.During work, an end separately of two signaling switches (14) all links to each other with common port, and the other end separately is connected to the electric leakage input of two-way compensating circuit.Because the electric leakage input current potential that is access to " comparator " anode that is produced by leak resistance (being equivalent to an equivalent resistance 15) when signaling switch disconnects is usually above the threshold potential of " deflection machine " adjustable termination toward " comparator " negative terminal, thereby output this moment " comparator " high level, " driver " also exports high level, it has blocked the electric current on the former limit of optical coupling switch (10), disconnects between two compensation outputs (4 and 5).When signaling switch is closed, the current potential that has only very low contact resistance generation to transport to " comparator " anode is usually less than threshold potential, it makes " comparator " output low level, " driver " be output low level also, the former limit of optical coupling this moment switch has electric current to flow through, and is closed between two compensation outputs.
Such signal of telecommunication switch electric leakage compensation arrangement has had both plurality of advantages such as simple in structure, reliable, of many uses, with low cost and easy to use.
Description of drawings
Accompanying drawing is the circuit diagram of a two-way electric leakage of the utility model compensation arrangement embodiment.Wherein 1 is compensator circuit of electric leakage, and 2 are the electric leakage input, and 3 is common port, 4 and 5 are the compensation output, and 6 is reference voltage end, and 7 is deflection machine, 8 is comparator (LM393 type), 9 is driver (7407 type), and 10 is safety switch (MOC3023 type bidirectional triode thyristor optical coupling switch), and 11 is current-limiting resistance, 12 is the adjustable end of deflection machine, 13 is current-limiting resistance, and 14 is signaling switch, and 15 is the equivalent resistance of leak resistance.
Claims (4)
1, a kind of electric leakage compensation arrangement of signal of telecommunication switch, it is characterized by, it comprises one or more compensator circuit of electric leakage, each compensator circuit of electric leakage is provided with an electric leakage input, a common port, two compensation outputs and a reference voltage end etc. are link externally, and comprise one " deflection machine ", one " comparator ", one " driver " and parts such as " safety switches ", between reference voltage and electric leakage input, insert a current-limiting resistance, two stiff ends of " deflection machine " connect reference voltage and common port respectively, the adjustable end of " deflection machine " is connected with two inputs of " comparator " respectively with the electric leakage input, the output of " two than device " is connected to the input of " driver ", the output of " driver " is connected to the input of " safety switch ", with the switch link of " safety switch " as two compensation outputs.
2, according to the electric leakage compensation arrangement of the described signal of telecommunication switch of claim 1, it is characterized by, described " safety switch " is exactly bidirectional triode thyristor optical coupling switch, electric current outflow end with the former limit of optical coupling switch links to each other with the output of described " driver ", flow into end with electric current and be connected with described reference voltage, and compensate outputs as described two with two switch links of optical coupling switch through a current-limiting resistance.
3, according to the electric leakage compensation arrangement of claim 1 and 2 described signal of telecommunication switches, it is characterized by, described electric leakage input inserts the anode of described " comparator ", and the adjustable termination of described " deflection machine " is gone into the negative terminal of described " comparator ".
4, according to the electric leakage compensation arrangement of the described signal of telecommunication switch of claim 1, it is characterized by, all be communicated with between the common port of described multichannel compensator circuit of electric leakage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90226463 CN2084684U (en) | 1990-12-28 | 1990-12-28 | Leakage compensator for electric signal switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90226463 CN2084684U (en) | 1990-12-28 | 1990-12-28 | Leakage compensator for electric signal switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2084684U true CN2084684U (en) | 1991-09-11 |
Family
ID=4903708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90226463 Withdrawn CN2084684U (en) | 1990-12-28 | 1990-12-28 | Leakage compensator for electric signal switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2084684U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106716156A (en) * | 2014-09-25 | 2017-05-24 | 西门子公司 | Circuit arrangement comprising a control device having at least one binary input, and associated operating method |
-
1990
- 1990-12-28 CN CN 90226463 patent/CN2084684U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106716156A (en) * | 2014-09-25 | 2017-05-24 | 西门子公司 | Circuit arrangement comprising a control device having at least one binary input, and associated operating method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |