CN105259853A - A redundant on-site bus I/O control device - Google Patents
A redundant on-site bus I/O control device Download PDFInfo
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Abstract
The invention discloses a redundant on-site bus I/O control device comprising a control mainboard, a display control panel, a power supply terminal, a switching value incoming signal terminal, a switching value output signal terminal and communication terminals. The control mainboard comprises a central processor, a storage, a power supply interface, an input interface, an output interface, two DP slave station controllers, two optoelectronic isolation circuits and two transmit-receive circuits. The display mainboard comprises a button set, a display screen and an indicating lamp set. In the invention, two DP slave station interfaces are respectively controlled by the DP slave station controllers corresponding to the DP slave station interfaces, and can respectively carry out complete data communication with a main station. When the control device is electrified, a power indication lamp shows the electrification. Through two indicating lamps, states of two DP networks are displayed. Through a display screen, measurement and configuration data are displayed. The communication terminals allows two modes which are a pluggable terminal and a DB9 socket to be employed. The wiring mode is selectable. The redundant on-site bus I/O control device of the invention is simple in structure, low in cost, high in communication rate and is reliable and stable. Usage of cables is greatly reduced.
Description
Technical field
The present invention relates to fieldbus I/O control technology field, particularly relate to a kind of on site redundant bus I/O control device.
Background technology
The current on-the-spot electrical equipment such as bus control system such as door, valve, substantially be all adopt the band DP of import from the Electrically operated gate of station interface, not only expensive and interface not redundancy, standby redundancy, plant maintenance etc. simultaneously all has problems, and for the control of domestic Electrically operated gate, valve etc., major part still adopts and the hard wired mode of dcs (DistributedControlSystem, DCS) system realizes, and cannot directly control corresponding field apparatus.PROFIBUS-DP bus is one of fieldbus international standard, Ye Shi China first fieldbus national standard, be made up of three compatible portion: PROFIBUS-DP, ROFIBUS-PA, PROFIBUS-FMS, wherein DP and DecentralizedPeriphery-dispersion is peripheral, PA and ProcessAutomation-process automation, FMS and FieldbusMessageSpecification-fieldbus message specification, PROFIBUS – DP is a kind of (baud rate is from 9.6Kbit/s to 12Mbit/s) low cost communication solution at a high speed, be usually used in the high-speed data transfer of field layer.Main website reads the input information of slave station periodically and sends output information to slave station periodically.Except the transmission of periodic user data, PROFIBUS-DP also provides the aperiodicity communication needed for intelligent equipment to carry out configuration, diagnosis and alert process.But existing fieldbus I/O (I/O) module also exists following deficiency: one, irredundant interface, and what provide is all single face, once interface, main website or bus cable occur abnormal, will normal communication; Two, the relevant parameters of module cannot be set at the scene and check communication state and the I/O situation of module; Three, can not carry out optimum configurations at the scene, local operation is tested, and the situation test such as the relay output of module and the action of institute's bringing onto load equipment; Four, DP slave station module is all take the mode of DB9 socket to be connected with the external world, external communication bus must through T-shaped Bussing connector could and model calling, mode is fixed, inconvenience on-the-spot installation and wiring; Five, the rig-site utilization environment of I/O module is comparatively severe, may have the strong interferers such as high-power electrical equipment and frequency converter, and connection process cable testing bridge in may containing the interference of various scenes, anti-interference facility is comprehensive, affects module and normally works; Six, poor reliability, communication speed is low, and on-site cable is numerous and diverse, and effect is bad.
Summary of the invention
The object of the invention is to, by a kind of on site redundant bus I/O control device, solve the problem that above background technology part is mentioned.
For reaching this object, the present invention by the following technical solutions:
A kind of on site redundant bus I/O control device, comprises and controls mainboard, display control board, power supply terminal, On-off signal signal terminal, switching value output signal terminal and communication terminal; Described control mainboard comprises central processing unit, storer, power interface, input interface, output interface, two DP from station control, two photoelectric isolating circuits, two transmission circuits; Described display mainboard comprises button group, display screen, pilot lamp group; Described storer, power interface, input interface, output interface and two DP connect central processing unit from station control, described two photoelectric isolating circuits connect from station control is corresponding with two DP, and described two transmission circuits correspondence connects two photoelectric isolating circuits; Described power supply terminal, On-off signal signal terminal, switching value output signal terminal, communication terminal are connected with the power interface on control mainboard, input interface, output interface, two transmission circuits; Described button group, display screen, pilot lamp group connection control mainboard.
Especially, described communication terminal comprises two pluggable communication terminals of three cores and DB9 socket.
Especially, described control mainboard also comprises reset circuit and watchdog circuit, and described reset circuit and watchdog circuit are electrically connected described central processing unit.
Especially, described DP selects SPC3 chip from station control; Described transmission circuit selects RS485 transmission circuit.
Especially, described button group comprises reset key, regulating key, button for subsequent use and setting/confirmation button.
Especially, described display screen selects LCD display.
Especially, described pilot lamp group comprises power light and two DP network relay indicating lights.
Especially, it is ten two points that the On-off signal of described On-off signal signal terminal is counted, each input point two terminals, is made up of two groups of each 12 double layers of terminals.
Especially, it is 6 points that the output of described switching value output signal terminal is counted, and the way of output is a normal opened contact and a normally closed contact of band common port, and each output point three terminals, are made up of one group of 18 core double layers of terminals.
The on site redundant bus I/O control device tool that the present invention proposes has the following advantages: one, redundant interface.Two DP that are completely independent, that can simultaneously work are controlled from station control by the DP corresponding with it separately from station interface, can carry out complete data communication respectively, and realize the on off control box state acquisition to field apparatus with main website.Two, on-the-spot display and configuration.Shown by power light during energising, and work and the communication state of two DP networks is shown respectively by two DP network relay indicating lights, character can be joined by display screen liquid crystal display simultaneously, the parameters such as the duty of display measurement and each communication port of configuration data and front end, convenient debugging and maintenance, and can on-the-spot configuration be carried out.Meanwhile, the situation test such as the relay output of optimum configurations and local operation test, particularly module and the action of institute's bringing onto load equipment can be carried out at the scene by button group and display screen, facilitate field adjustable, maintenance and test.Three, the mode of connection is enriched.Communication terminal provides pluggable terminal and DB9 socket two kinds of modes simultaneously, optionally can select the mode of connection, facilitates on-the-spot installation and wiring.Four, multiple devices can be with simultaneously.On-off signal signal terminal, switching value output signal terminal are 6DO/12DI, if the load equipment I/O point connected is few, then can share same module by multiple devices, decrease system cost, have more the advantage of cost performance than the equipment independently carrying bus interface.Five, open strong.Owing to have employed field bus technique, the present invention has good opening, and communications protocol opens completely with disclosed, be highly susceptible to other system particularly DCS network.Six, high anti-jamming capacity and environmental suitability.In the present invention, I/O adopts the isolation of Phototube Coupling, relay, communication adopts Phototube Coupling, by Optical Fiber Transmission etc., in addition, employs connection shielding, metal chassis shielding in shielding, parity checking, the verification of message cumulative sum are used in verification, have very strong environmental adaptation and antijamming capability.The environment temperature of work of the present invention is-20 DEG C-70 DEG C, and degree of protection is IP56, is therefore applicable to the place that boiler top equitemperature environment is more severe.Structure of the present invention is simple, and cost is low, reliable and stable, and signaling rate is high, significantly decreases cable and uses, be easy to promote the use of.
Accompanying drawing explanation
The on site redundant bus I/O control device one-piece construction figure that Fig. 1 provides for the embodiment of the present invention;
The on site redundant bus I/O control device structured flowchart that Fig. 2 provides for the embodiment of the present invention;
The power supply terminal wiring schematic diagram that Fig. 3 provides for the embodiment of the present invention;
The arrangement of the power supply terminal that Fig. 4 provides for the embodiment of the present invention, On-off signal signal terminal, switching value output signal terminal and communication terminal and entity structure diagram;
The display format schematic diagram of the On-off signal that Fig. 5 provides for the embodiment of the present invention;
The DP communication interface A condition display schematic diagram that Fig. 6 provides for the embodiment of the present invention;
The DP communication interface B state display schematic diagram that Fig. 7 provides for the embodiment of the present invention;
Fig. 8 for the embodiment of the present invention provide non-state is set time display screen display schematic diagram;
What Fig. 9 provided for the embodiment of the present invention enters display screen display schematic diagram after the state of setting;
Figure 10 arranges schematic diagram for the address of the DP communication interface A that the embodiment of the present invention provides;
Figure 11 arranges schematic diagram for the address of the DP communication interface B that the embodiment of the present invention provides.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.Be understandable that, specific embodiment described herein is only for explaining the present invention, but not limitation of the invention.It also should be noted that, for convenience of description, illustrate only part related to the present invention in accompanying drawing but not full content, unless otherwise defined, all technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present invention understand usually.Term used herein, just in order to describe specific embodiment, is not intended to be restriction the present invention.
Please refer to shown in Fig. 1 and Fig. 2, in the present embodiment, on site redundant bus I/O control device specifically comprises control mainboard (not shown), display control board 101, power supply terminal 102, On-off signal signal terminal 103, switching value output signal terminal 104 and communication terminal 105.Control mainboard, display control board 101, power supply terminal 102, On-off signal signal terminal 103, switching value output signal terminal 104 and communication terminal 105 in practical application to be all arranged in metal chassis 106.Described control mainboard comprises central processing unit 201, storer 202, power interface 203, input interface 204, output interface 205, display screen interface 206, keystroke interface 207, two DP from station control 208, two photoelectric isolating circuits 209, two transmission circuits 210; Described display mainboard comprises button group, display screen 107, pilot lamp group; Described storer 202, power interface 203, input interface 204, output interface 205, display screen interface 206, keystroke interface 207 and two DP connect central processing unit 201 from station control 208, described two photoelectric isolating circuits 209 connect from station control 208 is corresponding with two DP, and described two transmission circuits 210 correspondence connects two photoelectric isolating circuits 209; Described power supply terminal 102, On-off signal signal terminal 103, switching value output signal terminal 104, communication terminal 105 are connected with the power interface 203 controlled on mainboard, input interface 204, output interface 205, two transmission circuits 210; Described button group, display screen 107, pilot lamp group connection control mainboard.Described control mainboard also comprises reset circuit and watchdog circuit in the present embodiment, and described reset circuit and watchdog circuit are electrically connected described central processing unit 201.Eeprom chip selected by storer 202, is mainly used in the tributary address (may be the same or different) preserving two nets be set.Input interface 204 is for collection site equipment feedback signal.Output interface 205, for exporting for relay, is used for controlling field apparatus.Display screen interface 206, for connecting display screen 107, carries out setting parameter and data display.Keystroke interface 207, for connecting button group, carries out scene setting and operation.For needing the scene of collection analog data, can increase by 1 or 2 road AI interfaces.The group of button described in the present embodiment comprises reset key 108, regulating key 109, button for subsequent use 110 and arranges/confirm button 111, and wherein, reset key 108 represents with " R "; Regulating key 109 comprises rise button and lowers button, represents respectively with " ∧ " " ∨ "; Button 110 for subsequent use represents with " * "; Arrange/confirm button 111 to represent with " S "." S ": when measuring state, presses this key and enters the state of setting.Be acknowledgement key in the state of setting." ∧, ∨ ": non-state is set time, change displaying contents.When arranging state for revising parameter." * ": spare key." R ": no matter when, press this key and all will front end be resetted.Described display screen 107 selects LCD display.Described pilot lamp group comprises power light 112 and two DP network relay indicating lights 113.
In the present embodiment, described DP selects SPC3 chip from station control 208.Described transmission circuit 210 selects RS485 transmission circuit.SPC3 chip is a kind of for PROFIUBS-DP opened industrial Fieldbus Intelligent interface chip, SPC3 is integrated with complete DP agreement, comprising mode register, status register, interrupt register, various buffer pointer and buffer zone etc., effectively alleviate central processing unit pressure, can be used for 12Mbaud bus.DP slave station state machine is actually all PROFIBUS-DP slave stations and works from power on the several main state phase started to having to pass through during carrying out loop-around data exchange process with main website, one of four states is had: 1. in this state machine, electrification reset state: after on site redundant bus I/O control device powers on, the DP of two redundancies all enters Power_On state from station control, at central processing unit from station control, necessary optimum configurations and initialization carried out to two DP and start DP after station control, DP enters baud rate matching status from station control, continuous replacing baud rate is to realize baud rate synchronous be connected DP main website, now, if allow change tributary address two terminals (on site redundant bus I/O control device lower right side) short circuit (must before powering on short circuit, otherwise on site redundant bus I/O control device address can not be changed), then can set new tributary address by the debugging software on DP main website or notebook.Attention: two setting terminal short circuits also (disconnect after powering on several seconds after re-powering, otherwise heavily power on next time and can again enter address set condition), the address of two slave station unit all becomes 126 of acquiescence, no matter need the address of two DP interfaces of setting whether identical, all should arrange respectively.2., parametrization state is waited for: possessing the tributary address that user specifies (read from storer or reset) and docking port chip initiation completes and after starting its work, slave station enters waits for parametrization state, namely wait for the parametrization message from main website, this message carries part slave station operational factor, after parametrization success, slave station returns confirmation message, because main website only carries out exchanges data with by its parameterized slave station, therefore, parameterized object is actually the membership set up between master-salve station.3., configuration state is waited for: after parametrization, slave station enters waits for configuration state, wait for and check configuration message, that whether the I/O byte number of this message audit slave station is grasped with main website or that describe in GSD file identical (configuration data carried in message is the data that main website is expected).4., exchanges data state: after said process completes, main website may send out the message once reading slave station diagnostic data again, to check the state that slave station is current, after confirmation slave station has entered exchanges data state, then the operation of main website to this station enters cycle exchange data mode, and main website constantly exports data (when there being output data) to slave station write and obtains up-to-date slave station input data information simultaneously.This state is the object state that master-salve station connects, also be normality state, if because certain reason exchanges data state that caused slave station to exit, then main website is connected with it, at least will from subordinate phase, that is, the connection between master-salve station can not be skipped parametrization and configuration stage and directly be entered exchanges data.
As shown in Figure 3, power supply terminal 102 described in the present embodiment is the pluggable terminal of 3 core, is followed successively by L, N, G from left to right, corresponding to the live wire of acceptable 85-265VAC, zero line and ground wire.The power supply of front end is input as alternating current 220V or 110V (power consumption of every platform front end is no more than 5W, scope 85-265V), takies three connection terminals, is followed successively by live wire, zero line and ground wire.Should notice that its polarity must indicate one_to_one corresponding with terminal when accessing power lead, namely live wire should access the terminal, the zero line that are denoted as " L " and should access the terminal, the ground wire that are denoted as " N " and should access the terminal being denoted as " G ".
As shown in Figure 4, it is ten two points that the On-off signal of the signal terminal of On-off signal described in the present embodiment 103 is counted, each input point two terminals, be made up of two groups of each 12 double layers of terminals, terminal number is 1-24, upper strata is odd chanel, and lower floor is even-numbered channels, and upper strata 1,2 is the connection terminal of the 1st way switch amount input; 3,4 is the connection terminal that the 3rd way switch amount inputs; The rest may be inferred, and 17,18 is the connection terminal that the 11st way switch amount inputs.Lower floor 7,8 is the connection terminal of the 2nd way switch amount input; 9,10 is the connection terminal that the 4th way switch amount inputs; The rest may be inferred, and 23,24 is the connection terminal that the 12nd way switch amount inputs.During wiring, the two ends of input contact are directly accessed the connection terminal of corresponding input point.It is 6 points that the output of described switching value output signal terminal 104 is counted, the way of output is a normal opened contact and a normally closed contact of band common port, each output point three terminals, be made up of one group of 18 core double layers of terminals, terminal number is 25-42, and 25,26,27 is the connection terminal that the 1st way switch amount exports; 28,29,30 is the connection terminal that the 3rd way switch amount exports ... 40,41,42 is the connection terminal that the 6th way switch amount exports.During wiring, according to the type of contact, respectively load is directly accessed respective terminal of corresponding output point.With connecing two terminals above during normal opened contact, with connecing two terminals next during normally closed contact.For the 1st output point, when adopting normal opened contact, connecing 25,26 terminals, when adopting normally closed contact, connecing 26,27 terminals.
Described communication terminal 105 comprises two pluggable communication terminals of three cores and DB9 socket, is respectively used to be connected fieldbus by terminal mode with Bussing connector mode.Generally recommend to adopt conventional terminal to connect (being connected to again after line short circuit in terminal), add add-in connectors at the network terminal and terminal resistance switch is allocated to " ON " shelves.DP communication interface A on described two pluggable communication terminals of three cores and DB9 socket correspondence control respectively mainboard and DP communication interface B.The corresponding DP network A of DP communication interface A, DP communication interface B and DP network B.
Brief below pilot lamp group, display screen and button group to be described.One, pilot lamp group.Power light prompting power supply is connected.Two DP network relay indicating lights and DPA and DPB are respectively used to network state, represent that DP nets A just in communication when DPA length is bright, represent that DP nets B just in communication when DPB length is bright.Two, display screen.In this enforcement, display screen selects LCD display.Non-state is set time, LCD liquid crystal display screen is for showing relevant measurement data and communication interface state, On-off signal and output show respectively, the display format of On-off signal as shown in Figure 5, the top display of screen be the hexadecimal data of On-off signal, wherein 1-8 passage byte, 9-12 passage byte (reality nybble, Gao Siwei fixedly sets to 0).Below a line shows screen is the binary data of On-off signal, 1-8 and 9-12 passage is display separately, 8 bit binary data distinguish the binary value of corresponding 8-1 passage from left to right above, input junction closure is represented when being 1, represent when being 0 that input contact disconnects, below four is then the binary data of corresponding 12-9 passage.Such as, when 1,5 passages close, when 2,3,4,6,7,8 passages disconnect, corresponding hexadecimal data is 11, and scale-of-two is 00010001.When 9,10 passages close, when 11,12 passages disconnect, corresponding hexadecimal data is 03, and scale-of-two is 0011 (only display is effectively low four).Displaying contents by press regulating key " ∧, ∨ " key, can also show following parameter: as shown in Figure 6, and DP communication interface A condition shows, above a line show the address of DP communication interface A, here is the communication state of DP communication interface A and current baud rate.Communication state is one of four kinds below: Wait_PRM: wait for parametrization; Wait_CFG: wait for configuration; DATA_EX: exchanges data; ERROR: interface is abnormal; During normal operation, should continue to keep DATA_EX (exchanges data) state.As shown in Figure 7, DP communication interface B state shows, and the display implication of DP communication interface B is the same.Two, measuring state display and operation.As shown in Figure 8, non-state is set time, display screen, for showing relevant measurement data and communication interface state, can select different displaying contents by pressing " ∧, ∨ " key.The state of setting is entered by " S ".Three, state display and operation are set.A., after entering the state of setting, first show input password, form as shown in Figure 9.B. press " S " key after pressing " ∧, ∨ " key input 12, the address of the DP communication interface A of the machine can be set as shown in Figure 10.Press " ∧, ∨ " key modified address to desired value.C. again press " S " key, the address of the DP communication interface B of the machine is set as shown in figure 11.Generally, as DP communication interface A and DP communication interface B fully redundance, identical address value should be arranged to regard to address, in particular cases, also can be different.D. again press " S " key, then preserve the address date that just now arranged and return display measurement state of value.
In addition, because the rig-site utilization environment of this on site redundant bus I/O control device is comparatively severe, the strong interferers such as high-power electrical equipment and frequency converter may be had, and connection process cable testing bridge in may containing various scene interference, therefore, the interference protection measure of on site redundant bus I/O control device is very important, the major measure taked on site redundant bus I/O control device comprises: isolation (I/O: Phototube Coupling, relay are isolated, communication: Phototube Coupling, by Optical Fiber Transmission etc.); Shielding (connection shielding, metal chassis shielding); Verification (parity checking, the verification of message cumulative sum); Except the above-mentioned measure that module itself is taked, also following methods should be taked: on site redundant bus I/O control device installation site should as far as possible away from the strong interferers such as high-power electrical equipment and frequency converter.Connection should be forbidden and power cable or the cable parallel lay-up having frequency signal.The shielding line of connection must connect and guarantee single-end earthed.
Technical scheme tool of the present invention has the following advantages: one, redundant interface.Two DP that are completely independent, that can simultaneously work are controlled from station control by the DP corresponding with it separately from station interface, can carry out complete data communication respectively, and realize the on off control box state acquisition to field apparatus with main website.Two, on-the-spot display and configuration.Shown by power light during energising, and work and the communication state of two DP networks is shown respectively by two DP network relay indicating lights, character can be joined by display screen liquid crystal display simultaneously, the parameters such as the duty of display measurement and each communication port of configuration data and front end, convenient debugging and maintenance, and can on-the-spot configuration be carried out.Meanwhile, the situation test such as the relay output of optimum configurations and local operation test, particularly module and the action of institute's bringing onto load equipment can be carried out at the scene by button group and display screen, facilitate field adjustable, maintenance and test.Three, the mode of connection is enriched.Communication terminal provides pluggable terminal and DB9 socket two kinds of modes simultaneously, optionally can select the mode of connection, facilitates on-the-spot installation and wiring.Four, multiple devices can be with simultaneously.On-off signal signal terminal, switching value output signal terminal are 6DO/12DI, if the load equipment I/O point connected is few, then can share same module by multiple devices, decrease system cost, have more the advantage of cost performance than the equipment independently carrying bus interface.Five, open strong.Owing to have employed field bus technique, the present invention has good opening, and communications protocol opens completely with disclosed, be highly susceptible to other system particularly DCS network.Six, high anti-jamming capacity and environmental suitability.In the present invention, I/O adopts the isolation of Phototube Coupling, relay, communication adopts Phototube Coupling, by Optical Fiber Transmission etc., in addition, employs connection shielding, metal chassis shielding in shielding, parity checking, the verification of message cumulative sum are used in verification, have very strong environmental adaptation and antijamming capability.The environment temperature of work of the present invention is-20 DEG C-70 DEG C, and degree of protection is IP56, is therefore applicable to the place that boiler top equitemperature environment is more severe.Structure of the present invention is simple, and cost is low, reliable and stable, and signaling rate is high, significantly decreases cable and uses, be easy to promote the use of.
Note, above are only preferred embodiment of the present invention and institute's application technology principle.Skilled person in the art will appreciate that and the invention is not restricted to specific embodiment described here, various obvious change can be carried out for a person skilled in the art, readjust and substitute and can not protection scope of the present invention be departed from.Therefore, although be described in further detail invention has been by above embodiment, the present invention is not limited only to above embodiment, when not departing from the present invention's design, can also comprise other Equivalent embodiments more, and scope of the present invention is determined by appended right.
Claims (9)
1. an on site redundant bus I/O control device, is characterized in that, comprises and controls mainboard, display control board, power supply terminal, On-off signal signal terminal, switching value output signal terminal and communication terminal; Described control mainboard comprises central processing unit, storer, power interface, input interface, output interface, two DP from station control, two photoelectric isolating circuits, two transmission circuits; Described display mainboard comprises button group, display screen, pilot lamp group; Described storer, power interface, input interface, output interface and two DP connect central processing unit from station control, described two photoelectric isolating circuits connect from station control is corresponding with two DP, and described two transmission circuits correspondence connects two photoelectric isolating circuits; Described power supply terminal, On-off signal signal terminal, switching value output signal terminal, communication terminal are connected with the power interface on control mainboard, input interface, output interface, two transmission circuits; Described button group, display screen, pilot lamp group connection control mainboard.
2. on site redundant bus I/O control device according to claim 1, is characterized in that, described communication terminal comprises two pluggable communication terminals of three cores and DB9 socket.
3. on site redundant bus I/O control device according to claim 1, is characterized in that, described control mainboard also comprises reset circuit and watchdog circuit, and described reset circuit and watchdog circuit are electrically connected described central processing unit.
4. on site redundant bus I/O control device according to claim 1, it is characterized in that, described DP selects SPC3 chip from station control; Described transmission circuit selects RS485 transmission circuit.
5. on site redundant bus I/O control device according to claim 1, is characterized in that, described button group comprises reset key, regulating key, button for subsequent use and setting/confirmation button.
6. on site redundant bus I/O control device according to claim 1, it is characterized in that, described display screen selects LCD display.
7. on site redundant bus I/O control device according to claim 1, is characterized in that, described pilot lamp group comprises power light and two DP network relay indicating lights.
8. on site redundant bus I/O control device according to claim 1, is characterized in that, it is ten two points that the On-off signal of described On-off signal signal terminal is counted, each input point two terminals, is made up of two groups of each 12 double layers of terminals.
9. according to the on site redundant bus I/O control device one of claim 1 to 8 Suo Shu, it is characterized in that, it is 6 points that the output of described switching value output signal terminal is counted, the way of output is a normal opened contact and a normally closed contact of band common port, each output point three terminals, are made up of one group of 18 core double layers of terminals.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510755647.XA CN105259853A (en) | 2015-11-09 | 2015-11-09 | A redundant on-site bus I/O control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510755647.XA CN105259853A (en) | 2015-11-09 | 2015-11-09 | A redundant on-site bus I/O control device |
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| CN108227683A (en) * | 2018-03-22 | 2018-06-29 | 徐工集团工程机械股份有限公司科技分公司 | The centralized Control box of serial interface communication control |
| CN108241115A (en) * | 2016-12-26 | 2018-07-03 | 惠州市蓝微电子有限公司 | A kind of qualification test method of electric tool multi-series lithium battery protection panel products |
| WO2020119732A1 (en) * | 2018-12-14 | 2020-06-18 | 京信通信系统（中国）有限公司 | Adjusting and testing method and apparatus for communication device networking |
| CN112904814A (en) * | 2021-01-16 | 2021-06-04 | 京能十堰热电有限公司 | PROFIBUS equipment online communication state monitoring method based on NT6000 platform |
| CN113376552A (en) * | 2021-06-04 | 2021-09-10 | 北京四方继保工程技术有限公司 | Switching value testing device and method |
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| CN113376552A (en) * | 2021-06-04 | 2021-09-10 | 北京四方继保工程技术有限公司 | Switching value testing device and method |
| CN113376552B (en) * | 2021-06-04 | 2023-10-27 | 北京四方继保工程技术有限公司 | Switching value testing device and method |
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