CN1307697A - Digital input module - Google Patents
Digital input module Download PDFInfo
- Publication number
- CN1307697A CN1307697A CN 99808114 CN99808114A CN1307697A CN 1307697 A CN1307697 A CN 1307697A CN 99808114 CN99808114 CN 99808114 CN 99808114 A CN99808114 A CN 99808114A CN 1307697 A CN1307697 A CN 1307697A
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- CN
- China
- Prior art keywords
- input
- voltage
- signal
- digital
- input block
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- 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.)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
- B61L5/12—Visible signals
- B61L5/18—Light signals; Mechanisms associated therewith, e.g. blinders
- B61L5/1809—Daylight signals
- B61L5/1881—Wiring diagrams for power supply, control or testing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/24—Testing correct operation
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Emergency Protection Circuit Devices (AREA)
- Electronic Switches (AREA)
Abstract
The aim of the invention is to provide a digital input module (1) for a data-processing system. With said input module it is possible to obtain a digital signal from a binary-coded signal alternating voltage or signal direct voltage applied to a contact (5) of a signal transmitter (10). There are also means for monitoring the mode of functioning of the digital input module. According to the invention, a digital input module (1) for a data-processing system, for obtaining a digital signal from a binary-coded signal voltage applied to a contact (5) of a signal transmitter (10) has an input unit (15) which can be connected to the contact (5) and to the data-processing system, a changeover unit (30) which is connected to said input unit (15) and which subjects the input unit (15) to a tap voltage of zero volts in order to obtain the digital signal and subjects the input unit (15) to a test voltage in order to produce a test signal; and an optocoupler (20) which is located in the input unit (15). Said optocoupler is connected to the two inputs of the input unit (E15a, E15b) and to the output (A15a) of the input unit (15) by a rectifier bridge (25).
Description
The objective of the invention is provides a kind of digital input module to data processing equipment.Utilize this digital input module to obtain a digital signal from binary-coded ac voltage signal on the contact that is arranged in sender unit or d. c. voltage signal, the working method to the data load module also can realize monitoring simultaneously.
According to the present invention, above-mentioned purpose is to realize by a kind of like this digital input module that is used for data processing equipment, the binary-coded signal voltage that it is used for from the contact that is positioned at sender unit obtains a digital signal, this signal voltage has the magnitude of voltage of non-zero volt when logical one, have the magnitude of voltage of zero volt when logical zero.This digital input module comprises:
-one input block, an one input end can link to each other with the contact of sender unit, and its output terminal can link to each other with data processing equipment;
-one converter unit that links to each other by fixed interface with another input end of input block, this converter unit impels input block to load the tapping voltage (Abgreifspannung) of one zero volt, so that acquisition digital signal, and the test voltage of impelling a non-zero volt of input block loading, so that produce a test signal;
-one photo-coupler that is arranged in input block,
-its optocoupler input end links to each other with two input ends of input block by a rectifier bridge;
-its optocoupler output terminal links to each other with the output terminal of input block.
According to the present invention, the major advantage of digital input module is that its reliability can be monitored, and therefore also can be applied to the railway system, for example is used in the repeating signal station, requires to have extreme high reliability in these places as everyone knows.The reliability of digital input module monitored particularly be based on, can test its functional characteristic regularly by converter unit, in other words, by means of converter unit, be added in input block other input end be not tapping voltage but test voltage.Therefore, the digital input module course of work is as follows: under normal operation mode, promptly be used for when sender unit contact branch picks out signal voltage and be used to obtain digital signal, one zero volt voltage is added in another input end of input block by converter unit, so that be in signal voltage on the input end of input block by rectifier and photo-coupler, under the immovable situation of binary message, be connected to the output terminal of input block, just the output terminal of digital input module as digital signal.On the contrary, under the test job mode, test voltage is carried in another input end of input block by converter unit, and this test voltage is equivalent to the magnitude of voltage of signal voltage when logical one of sender unit.This conversion on another input end of input block causes the differential voltage on two input ends of input block to change.This can cause the output terminal generation variation of output signals at input block, or test signal occur for the digital input block with normal action function, and this must arouse attention.This test signal is corresponding with the digital signal of its binary message negate.If what the contact of sender unit occurred is the signal of logical one, then after being transformed into test voltage by converter unit, between two input ends of input block is 0 volt differential voltage signal.This in digital input module corresponding to logical zero, because the voltage that is on two input ends of input block is identical.After conversion, should produce the change of output signal, or produce the test signal of logical zero at the output terminal of input block.If test signal do not occur, then digital input module is bad.When the contact load logic " 0 " of sender unit, correspondingly also can test digital input module.
According to the present invention, another advantage of digital input module is, because rectifier bridge is arranged, digital input module can not only be with d. c. voltage signal as signal voltage, and can be with ac voltage signal as signal voltage, because have only (positive) DC voltage to be added on the photo-coupler all the time by the direct current rectifier bridge.This is necessary for photo-coupler, because digital input module provides a d. c. voltage signal as digital signal usually at its output terminal.The input end of photo-coupler generally has a photodiode in addition, and photodiode can not be operated under the reverse voltage.Another advantage of this photo-coupler be it effectively the protected data treating apparatus avoid influence at the overload voltage at the contact place of sender unit; thereby can remove the infringement that may cause the data treating apparatus; improve the reliability of the tap unit of forming by digital input module and data processing equipment (Abgreifeinheit) significantly, and and then improve its safety in operation.
For digital input module of the present invention also can be used in a plurality of sender units that the contacts that have a signal voltage are provided more, according to the present invention, digital input module has and the corresponding a plurality of input blocks of described input block, these input blocks input end separately links to each other with another contact of sender unit respectively, and another input end then links to each other with converter unit respectively.
If be applied to then on the relay tip at repeating signal station, should connect digital input module in the repeating signal station according to digital input module of the present invention.Relay tip links to each other with the earth by an optical indicating device usually.If the concrete condition at each repeating signal station is not like this, the indicator that is lacked considers that it just can come to substitute to the electro ultrafiltration of digital input module like this, promptly between two input ends of input block, connect an electric loading, for example an Ohmage or a constant current source.Advantage according to this digital input module of the present invention is that this module can not only be applied to have the repeating signal station of optical indicator, can be applied to not have the repeating signal station of optical indicator too.
In order especially simply thereby particularly advantageously to provide zero volt voltage and non-zero volt voltage to converter unit, also proof more advantageously, converter unit links to each other with the earth by the one joint that can lay, and the joint that can lay by its another links to each other with the voltage source of an output non-zero volt voltage of sender unit.
In order to explain the present invention, described in detail by the embodiment of an accompanying drawing below digital input module of the present invention.
A digital input module 1 shown in the accompanying drawing, it obtains digital signal by an input block 15 by a signal voltage on a contact 5 of sender unit 10, an input end E15a of input block 15 can link to each other with the contact 5 of sender unit 10, or is the state that linked to each other as shown in FIG..Input block 15 has a photo-coupler 20 and is used for potential isolation.An optocoupler input end E20a of photo-coupler 20 links to each other with an input end E15a of input block 15, and another optocoupler input end E20b links to each other with another input end E15b of input block 15.Two input end E15a of input block 15 and E15b, and two input end E20a of photo-coupler 20 and the connection between the E20b guarantee by a rectifier bridge 25.Another input end E15b of input block 15 links to each other with the fixedly input end E30a of converter unit 30.The joint E30b that converter unit 30 can be laid by one links to each other with the ground potential as tapping voltage (Abgreifspannung), and the joint E30c that can lay by its another links to each other with a test voltage, wherein, test voltage is corresponding with the signal voltage value of the non-zero volt of sender unit 10 outputs.This point realizes like this that specifically the joint E30c that another of converter unit 30 can be laid links to each other with the voltage source 35 of sender unit 10.Sender unit 10 has a plurality of electronic switches 40, and they turn on respectively between each contact of voltage source 35 and sender unit 10.Except contact 5, sender unit 10 also has other contact 45, utilizes them can transmit other signal voltage.
In addition, other input block 50 is shown also in the accompanying drawing, its electrical structure is identical with input block 15, links to each other with other contact 45 of sender unit 10 respectively by an one input end E50a.
The contact 5 of sender unit 10 and/or other contact 45 are the relay tips as the repeating signal station of sender unit 10 work.
By accompanying drawing as can be known, be connected with optical indicator 55 respectively between the contact 5 of sender unit 10 and other contact 45, they make signal voltage visual on contact separately respectively.Because herein sender unit 10 is repeating signal stations, optical indicator 55 for example can be the bulb on the signal meter (SM) panel at repeating signal station.
If between the contact 5 of sender unit 10 and/or other contact 45, can not take over what optical indicator, then can substitute with the Ohmage between two input ends of the input block in the digital input module 1.
Can obtain digital signal from the binary-coded signal voltage on the contact 5 (exchanging or DC voltage) by digital input module 1, and obtain other digital signal from the same signal voltage on other contact 45, and with in the digital signal feed-in data processing equipment, thus contact 5 and 45 and data processing equipment between connect a digital input module 1.The interface of data processing equipment one side, the interface that promptly is used for acquired digital signal is fed to data processing equipment is the output terminals A 15a of input block 15 and the output terminals A 50a and the A50b of A15b and other input block 50.
In order to read signal voltage at contact 5 and 45 places, on another input end E50b of another input end E15b of input block 15 or input block 50, add the tapping voltage of one zero volt, so that between two input end E15a of input block 15 and the E15b or between two the input end E50a and E50b at other input block 50, set up one and correspond respectively to the voltage of signal voltage separately, the non-zero volt voltage that the on off operating mode of promptly looking each switch 40 equals zero respectively and lies prostrate voltage or equal voltage source 35.Voltage source can provide for example 60V or 24V DC voltage, also can provide the 24V alternating voltage.Voltage between two input ends of each input block carries out rectification in affiliated rectifier bridge, and send separately photo-coupler thus to, photo-coupler is realized potential isolation, and in one of the output terminal output of digital input module and each contact binary coding voltage corresponding output voltage as digital signal.Briefly, the signal voltage of each contact carries out rectification in digital input module, and is sent to each output terminal of digital input module as digital signal.
The test of the working method of digital input module 1 is by means of converter unit 30 another input end E15b of input block 15 or another input end E50b of other input block 50 to be linked to each other with voltage source 35.In this case, between two input end E15a and E15b of input block 15, and between two input end E50a of other input block 50 and E50b, set up a voltage, this voltage volt that equals zero when signal voltage is not equal to zero volt (switch 40 is connected), this voltage is not equal to zero lying prostrate when signal voltage equals zero volt (switch 40 is opened).The variation of this input voltage on input block 15 and 50, in high performance digital input module 1, must on two output terminals of input block 15 and 50, the change by signal arouse attention, and on the output terminal of each input block or digital input module 1, producing a test signal, this test signal equals the digital signal of negate.When signal voltage is a logical one, replace that the digital signal of logical one occurs be not the test signal of logical zero the time, show that then digital input module is bad.This can be by in data processing equipment, or a fault-signal that produces in the control module that does not illustrate in digital input module 1 represents, can certainly produce be used for determining input block 15 and 50 which be bad fault-signal.
If when signal voltage is not equal to zero volt (" 1 "), after the converter unit conversion, in digital input module, do not define fault, just can follow whether measuring optical indicant 55 is bad.When switch 40 is opened (the signal voltage volt that equals zero, " 0 ") time, on another input end E15b of input block 15, load test voltage, or on another input end E50b of other input block 50, load test voltage, should in each photo-coupler 20, flow through an electric current, this electric current can be used as signal change in the input block 15 or 50 that is disposed identified, and promptly digital signal " 0 " should correspondingly become test signal " 1 ".If in high performance digital input module 1, do not flow through electric current (both do not had signal change, and test signal also do not occurred), then be that the optics indicant has been broken certainly.
As shown in drawings, can also comprise other converter unit 70 in the digital input module 1, they are worked as converter unit 30, and link to each other with unshowned input block in the accompanying drawing.If a plurality of converter units 70 are arranged, then they are operated front and back in time, and monitor the change of signal level on the input block output terminal.In high performance digital input module 1, only allow on the input block of in running order converter unit, to occur the change of signal level.On the contrary, if the change of signal level occurs on the input block of one or more converter units, then produce the signal of not expected " cross-talk " from a converter unit to another converter unit, this can represent by corresponding fault-signal again.
Claims (4)
1. digital input module (1) that is used for data processing equipment, the binary-coded signal voltage that is used for from the contact (5) that is positioned at sender unit (10) obtains a digital signal, this signal voltage has the magnitude of voltage of non-zero volt when logical one, have the magnitude of voltage of zero volt when logical zero, this digital input module comprises:
-one input block (15), an one input end (E15a) can link to each other with the contact (5) of sender unit (10), and its output terminal (A15a) links to each other with data processing equipment;
-one converter unit (30) that links to each other with another input end (E15b) of input block (15) by fixture splice (E30a), this converter unit impels input block (15) to load the tapping voltage (Abgreifspannung) of one zero volt, so that acquisition digital signal, and the test voltage of impelling a non-zero volt of input block (15) loading, so that produce a test signal;
-one photo-coupler (20) that is arranged in input block (15),
-its photo-coupler input end (E20a, E20b) (E15a's two input ends by a rectifier bridge (25) and input block (15) E15b) links to each other;
-its photo-coupler output terminal links to each other with the output terminal (A15a) of input block (15).
2. digital input module according to claim 1 is characterized in that,
-this digital input module (1) has other and the corresponding input block of described input block (15) (50),
An input end (E50a) of-these input blocks (50) links to each other with another contact (45) of sender unit (10) respectively;
-their other input ends (50b) then link to each other with converter unit (30) respectively.
3. according to the described digital input module of above-mentioned each claim, it is characterized in that,
-between two input ends of at least one input block, connecting an electric loading, this electric loading is copied an optical indicator in the repeating signal station aspect electrical specification.
4. according to the described digital input module of above-mentioned each claim, it is characterized in that,
Described converter unit (30) links to each other with the earth by its joint that can lay (E30b), links to each other the voltage of this voltage source output non-zero volt with a voltage source (35) of sender unit (10) by another joint that can lay (E30c).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19823441.4 | 1998-05-19 | ||
| DE1998123441 DE19823441C1 (en) | 1998-05-19 | 1998-05-19 | Digital input assembly for data processing system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1307697A true CN1307697A (en) | 2001-08-08 |
| CN1132082C CN1132082C (en) | 2003-12-24 |
Family
ID=7868939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99808114 Expired - Fee Related CN1132082C (en) | 1998-05-19 | 1999-05-05 | Digital input module |
Country Status (5)
| Country | Link |
|---|---|
| CN (1) | CN1132082C (en) |
| AT (1) | AT413307B (en) |
| DE (1) | DE19823441C1 (en) |
| HK (1) | HK1036113A1 (en) |
| WO (1) | WO1999060453A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2182500A1 (en) | 2008-10-31 | 2010-05-05 | Siemens AG | Digital inputs for electronic equipment |
| CN103378847B (en) * | 2012-04-24 | 2016-11-23 | 西门子电力自动化有限公司 | Binary input circuit |
| CN113562017B (en) * | 2021-08-19 | 2023-02-28 | 中铁二十四局集团上海电务电化有限公司 | Railway turnout interlocking control system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1169166B (en) * | 1983-02-15 | 1987-05-27 | Gd Spa | FUNCTIONAL CONTROL SYSTEM OF INPUT CIRCUITS TO A CENTRAL CONTROL AND CONTROL UNIT FOR MACHINES AND / OR DEVICES USABLE IN PRODUCTION AND / OR PACKAGING LINES OF PRODUCTS |
| DE4100699A1 (en) * | 1991-01-11 | 1992-07-16 | Siemens Ag | CIRCUIT FOR SECURE INPUT AND / OR OUTPUT OF BINARY DATA |
| US5757275A (en) * | 1995-12-29 | 1998-05-26 | Siemens Energy & Automation, Inc. | Fault monitoring technique for programmable logic controllers |
| DE19606894C2 (en) * | 1996-02-13 | 2003-01-23 | Siemens Ag | Device for the signal-safe control and monitoring of electrical consumers in the railway system |
-
1998
- 1998-05-19 DE DE1998123441 patent/DE19823441C1/en not_active Expired - Fee Related
-
1999
- 1999-05-05 WO PCT/DE1999/001388 patent/WO1999060453A1/en active Application Filing
- 1999-05-05 AT AT0903499A patent/AT413307B/en not_active IP Right Cessation
- 1999-05-05 CN CN 99808114 patent/CN1132082C/en not_active Expired - Fee Related
-
2001
- 2001-09-19 HK HK01106610A patent/HK1036113A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| HK1036113A1 (en) | 2001-12-21 |
| CN1132082C (en) | 2003-12-24 |
| DE19823441C1 (en) | 1999-07-08 |
| ATA903499A (en) | 2005-06-15 |
| AT413307B (en) | 2006-01-15 |
| WO1999060453A1 (en) | 1999-11-25 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20031224 |