CN215729353U - Safety controller - Google Patents
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- CN215729353U CN215729353U CN202121594913.2U CN202121594913U CN215729353U CN 215729353 U CN215729353 U CN 215729353U CN 202121594913 U CN202121594913 U CN 202121594913U CN 215729353 U CN215729353 U CN 215729353U
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Abstract
The utility model relates to a safety controller, and relates to the technical field of controllers. The safety controller comprises a first control board and a second control board; the first calculation processing unit of the first control board is respectively connected and electrically isolated with the first system IO input processing unit, the first system IO output processing unit, the first user IO input processing unit and the first user IO output processing unit of the first control board, so that interference signals are prevented from being interfered to the first calculation processing unit; the second calculation processing unit of the second control board is respectively connected with and electrically isolated from the second system IO input processing unit, the second system IO output processing unit, the second user IO input processing unit and the second user IO output processing unit of the second control board, so that interference signals are prevented from being interfered to the second calculation processing unit. Simultaneously, first control panel and second control panel are spaced each other, possess sufficient electric clearance between the two to can effectively avoid the mutual electric interference of the two.
Description
Technical Field
The utility model relates to the technical field of controllers, in particular to a safety controller.
Background
Safety controllers are important control components in robots. Most of the existing safety controllers adopt a 1oo2 architecture, and under the 1oo2 architecture, the safety controller comprises two MCU systems.
In the prior art, the integration level of two MCU subsystems is high, and sufficient electrical clearance is difficult to ensure between the MCU systems; the two MCU systems are prone to generate mutual electrical interference, which results in communication errors. Meanwhile, signal crosstalk is easily generated between MCU systems.
SUMMERY OF THE UTILITY MODEL
The utility model provides a safety controller, which aims to solve the problems that mutual electrical interference and signal crosstalk are easily generated between two MCU systems of the conventional safety controller.
The utility model provides a safety controller, which comprises a first control board and a second control board; the first control panel comprises a first computing processing unit, a first system IO input processing unit, a first system IO output processing unit, a first user IO input processing unit and a first user IO output processing unit; the first computing processing unit is respectively connected and electrically isolated with the first system IO input processing unit, the first system IO output processing unit, the first user IO input processing unit and the first user IO output processing unit;
the second control panel comprises a second computing processing unit, a second system IO input processing unit, a second system IO output processing unit, a second user IO input processing unit and a second user IO output processing unit, and the second computing processing unit is respectively connected with and electrically isolated from the second system IO input processing unit, the second system IO output processing unit, the second user IO input processing unit and the second user IO output processing unit;
the first calculation processing unit is connected with the second calculation processing unit.
The further technical scheme is that the safety controller also comprises a system IO input interface and a user IO input interface;
the first system IO input processing unit comprises a first isolation device, the input end of the first isolation device is connected with the system IO input interface, the output end of the first isolation device is connected with the first computing processing unit, and the input end and the output end of the first isolation device are respectively supplied with power by different voltage sources;
the first user IO input processing unit comprises a second isolation device, the input end of the second isolation device is connected with the user IO input interface, the output end of the second isolation device is connected with the first computing processing unit, and the input end and the output end of the second isolation device are respectively supplied with power by different voltage sources;
the second system IO input processing unit comprises a third isolation device, the input end of the third isolation device is connected with the system IO input interface, the output end of the third isolation device is connected with the second computing processing unit, and the input end and the output end of the third isolation device are respectively supplied with power by different voltage sources;
the second user IO input processing unit comprises a fourth isolation device, the input end of the fourth isolation device is connected with the user IO input interface, the output end of the fourth isolation device is connected with the second computing processing unit, and the input end and the output end of the fourth isolation device are respectively supplied with power by different voltage sources.
The technical scheme is that the first system IO input processing unit further includes a first level shift unit, and an output end of the first isolation device is connected to the first calculation processing unit through the first level shift unit;
the first user IO input processing unit further comprises a second level conversion unit, and the output end of the second isolation device is connected with the first calculation processing unit through the second level conversion unit;
the second system IO input processing unit further comprises a third level conversion unit, and the output end of the third isolation device is connected with the second calculation processing unit through the third level conversion unit;
the second user IO input processing unit further comprises a fourth level conversion unit; and the output end of the fourth isolation device is connected with the second calculation processing unit through the fourth level conversion unit.
The further technical scheme is that the safety controller also comprises a system IO output interface and a user IO output interface;
the first system IO output processing unit comprises a fifth isolation device, and the input end of the fifth isolation device is connected with the first calculation processing unit; the output end of the fifth isolation device is connected with the system IO output interface, and the input end and the output end of the fifth isolation device are respectively supplied with power by different voltage sources;
the first user IO output processing unit comprises a sixth isolation device, and the input end of the sixth isolation device is connected with the first computing processing unit; the output end of the sixth isolation device is connected with the user IO output interface, and the input end and the output end of the sixth isolation device are respectively supplied with power by different voltage sources;
the second system IO output processing unit comprises a seventh isolation device, and the input end of the seventh isolation device is connected with the second computing processing unit; the output end of the seventh isolating device is connected with the system IO output interface, and the input end and the output end of the seventh isolating device are respectively supplied with power by different voltage sources;
the second user IO output processing unit comprises an eighth isolating device, and the input end of the eighth isolating device is connected with the second computing processing unit; and the output end of the eighth isolating device is connected with the user IO output interface, and the input end and the output end of the eighth isolating device are respectively supplied with power by different voltage sources.
The safety controller comprises a first power interface, a second power interface and a third power interface;
the input end of the first isolation device, the input end of the third isolation device, the output end of the fifth isolation device and the output end of the seventh isolation device are all connected with the first power interface;
the input end of the second isolation device, the input end of the fourth isolation device, the output end of the sixth isolation device and the output end of the eighth isolation device are all connected with the third power interface;
the output end of the first isolation device, the output end of the third isolation device, the input end of the fifth isolation device, the input end of the seventh isolation device, the output end of the second isolation device, the output end of the fourth isolation device, the input end of the sixth isolation device and the input end of the eighth isolation device are all connected with a second power supply interface.
The further technical scheme is that the first system IO output processing unit comprises a ninth isolation device, and an input end of the ninth isolation device is connected with an output end of the fifth isolation device and grounded; the output end of the ninth isolation device is connected with the first computing processing unit and the second power interface;
the first user IO output processing unit comprises a tenth isolation device, and the input end of the tenth isolation device is connected with the output end of the sixth isolation device and grounded; the output end of the tenth isolating device is connected with the first computing processing unit and the second power interface;
the second system IO output processing unit comprises an eleventh isolation device, and the input end of the eleventh isolation device is connected with the output end of the seventh isolation device and grounded; the output end of the eleventh isolating device is connected with the second computing processing unit and the second power supply interface;
the second user IO output processing unit comprises a twelfth isolation device, and the input end of the twelfth isolation device is connected with the output end of the eighth isolation device and grounded; and the output end of the twelfth isolating device is connected with the second computing processing unit and the second power supply interface.
The first control board also comprises a first over-current and over-voltage detection unit, a second over-current and over-voltage detection unit and a third over-current and over-voltage detection unit; the first computing and processing unit is connected with the first power interface, the second power interface and the third power interface respectively through the first overcurrent and overvoltage detection unit, the second overcurrent and overvoltage detection unit and the third overcurrent and overvoltage detection unit;
the second control board further comprises a fourth overcurrent and overvoltage detection unit, a fifth overcurrent and overvoltage detection unit and a sixth overcurrent and overvoltage detection unit; the second calculation processing unit is connected with the first power interface, the second power interface and the third power interface through the fourth overcurrent and overvoltage detection unit, the fifth overcurrent and overvoltage detection unit and the sixth overcurrent and overvoltage detection unit respectively.
The first control board further comprises a first watchdog reset circuit, and the first watchdog reset circuit is connected with the first calculation processing unit.
The second control board further comprises a second watchdog reset circuit, and the second watchdog reset circuit is connected with the second calculation processing unit.
The safety controller also comprises a communication interface which is connected with the first calculation processing unit; the communication interface, the system IO input interface, the user IO input interface, the system IO output interface and the user IO output interface are all arranged on the first control board.
In the technical scheme of the utility model, on one hand, the first control board and the second control board are mutually spaced and have enough electric clearance, so that the mutual electric interference between the first control board and the second control board can be effectively avoided. On the other hand, the first calculation processing unit is respectively connected with and electrically isolated from the first system IO input processing unit, the first system IO output processing unit, the first user IO input processing unit and the first user IO output processing unit, so that propagation of interference signals can be effectively blocked, and interference signals are prevented from being interfered to the first calculation processing unit. The second calculation processing unit is respectively connected with the second system IO input processing unit, the second system IO output processing unit, the second user IO input processing unit and the second user IO output processing unit and is electrically isolated, so that propagation of interference signals can be effectively blocked, and interference signals are prevented from being interfered to the second calculation processing unit.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a block diagram of a safety controller according to an embodiment of the present invention;
fig. 2 is a block diagram of a first system IO input processing unit of a security controller according to an embodiment of the present invention;
fig. 3 is a block diagram of a first user IO input processing unit of a security controller according to an embodiment of the present invention;
fig. 4 is a block diagram of a second system IO input processing unit of a security controller according to an embodiment of the present invention;
fig. 5 is a block diagram of a second user IO input processing unit of a security controller according to an embodiment of the present invention;
fig. 6 is a block diagram of a first system IO output processing unit of a security controller according to an embodiment of the present invention;
fig. 7 is a block diagram of a first user IO output processing unit of a security controller according to an embodiment of the present invention;
fig. 8 is a block diagram of a second system IO output processing unit of a security controller according to an embodiment of the present invention;
fig. 9 is a block diagram of a second user IO output processing unit of a security controller according to an embodiment of the present invention.
Reference numerals
A first control board 10, a second control board 20, a system IO input interface 50, a user IO input interface 60, a system IO output interface 70, a user IO output interface 80, a communication interface 90, a board-to-board connector 100, a first power interface 110, a second power interface 120, a third power interface 130, a first level conversion unit 140, a second level conversion unit 150, a third level conversion unit 160, a fourth level conversion unit 170, a first calculation processing unit 31, a first over-current and over-voltage detection unit 34, a second over-current and over-voltage detection unit 35, a third over-current and over-voltage detection unit 36, a first watchdog reset circuit 37, a first system IO input processing unit 321, a first system IO output processing unit 322, a first user IO input processing unit 331, a first user IO output processing unit 332, a second calculation processing unit 41, a fourth over-current and over-voltage detection unit 44, A fifth overcurrent and overvoltage detection unit 45, a sixth overcurrent and overvoltage detection unit 46, a second watchdog reset circuit 47, a second system IO input processing unit 421, a second system IO output processing unit 422, a second user IO input processing unit 431, and a second user IO output processing unit 432.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1 to 9, an embodiment of the present invention provides a safety controller. As can be seen, the safety controller includes a first control board 10 and a second control board 20.
The first control board 10 includes a first calculation processing unit 31, a first system IO input processing unit 321, a first system IO output processing unit 322, a first user IO input processing unit 331, and a first user IO output processing unit 332; the first computation processing unit 31 is respectively connected and electrically isolated with the first system IO input processing unit 321, the first system IO output processing unit 322, the first user IO input processing unit 331, and the first user IO output processing unit 332, so that propagation of interference signals can be effectively blocked, and interference signals are prevented from being interfered to the first computation processing unit 31.
The second control board 20 includes a second calculation processing unit 41, a second system IO input processing unit 421, a second system IO output processing unit 422, a second user IO input processing unit 431, and a second user IO output processing unit 432, the second calculation processing unit 41 respectively with the second system IO input processing unit 421, the second system IO output processing unit 422, the second user IO input processing unit 431, and the second user IO output processing unit 432 are connected and electrically isolated, so that propagation of an interference signal can be effectively blocked, and crosstalk of the interference signal to the second calculation processing unit 41 is avoided.
Further, the first calculation processing unit 31 is connected to the second calculation processing unit 41, so that data interaction can be performed between the first calculation processing unit 31 and the second calculation processing unit 41. For example, in one embodiment, the first calculation processing unit 31 and the second calculation processing unit 41 are connected through a UART and exchange data. UART (Universal Asynchronous Receiver/Transmitter) is widely used, and can convert data to be transmitted between serial communication and parallel communication.
It should be noted that the first control board 10 and the second control board 20 may be both PCB boards.
In the technical solution of the present invention, on one hand, the first control board 10 and the second control board 20 are spaced from each other, and there is a sufficient electrical gap between the two, so that the electrical interference between the two can be effectively avoided. On the other hand, the first calculation processing unit 31 is respectively connected and electrically isolated from the first system IO input processing unit 321, the first system IO output processing unit 322, the first user IO input processing unit 331, and the first user IO output processing unit 332, so that propagation of an interference signal can be effectively blocked, and crosstalk of the interference signal to the first calculation processing unit 31 is avoided. The second calculation processing unit 41 is respectively connected and electrically isolated with the second system IO input processing unit 421, the second system IO output processing unit 422, the second user IO input processing unit 431, and the second user IO output processing unit 432, so that propagation of an interference signal can be effectively blocked, and crosstalk of the interference signal to the second calculation processing unit 41 is avoided.
In the embodiment of the utility model, the safety controller carries out redundancy detection on the input of a system safety signal and a user safety signal; and meanwhile, the redundant control is carried out on the output of the system safety signal and the user safety signal.
Specifically, if the system safety signal and the user safety signal received by the first control board 10 and the second control board 20 do not coincide, it is determined that a safety failure has occurred.
If the loop detection signals redundantly output by the first control board 10 and the second control board 20 are not consistent, it is determined that a safety fault occurs.
Further, the safety controller further includes a system IO input interface 50 and a user IO input interface 60, where the system IO input interface 50 is configured to receive a system IO signal (system safety signal); the user IO input interface 60 is used to receive a user IO signal (user security signal).
Referring to fig. 2 in combination with fig. 1, in the present embodiment, the first system IO input processing unit 321 includes a first isolation device Q1 and a first level shift unit 140.
The input end of the first isolation device Q1 is connected to the system IO input interface 50, the output end of the first isolation device Q1 is connected to the first computation processing unit 31, and the input end and the output end of the first isolation device Q1 are respectively supplied with power by different voltage sources, so that electrical isolation between the input end and the output end of the first isolation device Q1 can be achieved, and crosstalk of interference signals to the first computation processing unit 31 is avoided.
Further, the output terminal of the first isolation device Q1 is connected to the first calculation processing unit 31 through the first level shift unit 140. The first level shift unit 140 is configured to shift the voltage output from the output terminal of the first isolation device Q1 to a voltage matched with the first computation processing unit 31, so as to avoid the first computation processing unit 31 from being burned out. The first level conversion unit 140 may specifically include a DC-DC conversion circuit.
Referring to fig. 3 in combination with fig. 1, in an embodiment, the first user IO input processing unit 331 includes a second isolation device Q2 and a second level shift unit 150.
The input end of the second isolation device Q2 is connected to the user IO input interface 60, the output end of the second isolation device Q2 is connected to the first computation processing unit 31, and the input end and the output end of the second isolation device Q2 are respectively supplied with power by different voltage sources, so that electrical isolation between the input end and the output end of the second isolation device Q2 can be achieved, and crosstalk of interference signals to the first computation processing unit 31 is avoided.
Further, the output terminal of the second isolation device Q2 is connected to the first calculation processing unit 31 through the second level shift unit 150.
The second level shifter 150 is used to convert the voltage output from the output terminal of the second isolation device Q2 into a voltage matched with the first computation processing unit 31, so as to avoid the first computation processing unit 31 from being burned out. The second level shifting unit 150 may specifically include a DC-DC conversion circuit.
Referring to fig. 4 in combination with fig. 1, in an embodiment, the second system IO input processing unit 421 includes a third isolation device Q3 and a third level shift unit 160.
The input end of the third isolation device Q3 is connected to the system IO input interface 50, the output end of the third isolation device Q3 is connected to the second computation processing unit 41, and the input end and the output end of the third isolation device Q3 are respectively supplied with power by different voltage sources; therefore, the electrical isolation between the input end and the output end of the third isolation device Q3 can be realized, and the interference signal crosstalk to the second calculation processing unit 41 is avoided.
Further, the output terminal of the third isolation device Q3 is connected to the second calculation processing unit 41 through the third level shift unit 160.
The third level shifter 160 is used to convert the voltage output from the output terminal of the third isolation device Q3 into a voltage matched with the second calculation processing unit 41, so as to avoid the second calculation processing unit 41 from being burned out. The third level conversion unit 160 may specifically include a DC-DC conversion circuit.
Referring to fig. 5 in combination with fig. 1, in an embodiment, the second user IO input processing unit 431 includes a fourth isolation device Q4 and a fourth level shift unit 170.
The input end of the fourth isolation device Q4 is connected to the user IO input interface 60, the output end of the fourth isolation device Q4 is connected to the second computation processing unit 41, and the input end and the output end of the fourth isolation device Q4 are respectively supplied with power by different voltage sources, so that electrical isolation between the input end and the output end of the fourth isolation device Q4 can be achieved, and crosstalk of interference signals to the second computation processing unit 41 is avoided.
The output terminal of the fourth isolation device Q4 is connected to the second calculation processing unit 41 through the fourth level shift unit 170. The fourth level shift unit 170 is configured to shift the voltage output from the output terminal of the fourth isolation device Q4 to a voltage matched with the second computation processing unit 41, so as to avoid the second computation processing unit 41 from being burned out. The fourth level shifting unit 170 may specifically include a DC-DC conversion circuit.
Further, the safety controller further includes a system IO output interface 70 and a user IO output interface 80, where the system IO output interface 70 is configured to output a system IO signal (system safety signal); the user IO output interface 80 is used to output a user IO signal (user security signal).
Referring to fig. 6 in combination with fig. 1, the first system IO output processing unit 322 includes a fifth isolation device Q5, and an input terminal of the fifth isolation device Q5 is connected to the first calculation processing unit 31; the output end of the fifth isolation device Q5 is connected to the system IO output interface 70, and the input end and the output end of the fifth isolation device Q5 are respectively supplied with power by different voltage sources, so that electrical isolation between the input end and the output end of the fifth isolation device Q5 can be achieved, and crosstalk of interference signals to the first computing and processing unit 31 is avoided.
Referring to fig. 7 in conjunction with fig. 1, the first user IO output processing unit 332 includes a sixth isolation device Q6, an input of the sixth isolation device Q6 is connected to the first calculation processing unit 31; the output end of the sixth isolation device Q6 is connected to the user IO output interface 80, and the input end and the output end of the sixth isolation device Q6 are respectively supplied with power by different voltage sources, so that electrical isolation between the input end and the output end of the sixth isolation device Q6 can be achieved, and interference signals are prevented from being interfered to the first computing and processing unit 31.
Referring to fig. 8 in conjunction with fig. 1, the second system IO output processing unit 422 includes a seventh isolation device Q7, and an input terminal of the seventh isolation device Q7 is connected to the second calculation processing unit 41; the output end of the seventh isolation device Q7 is connected to the system IO output interface 70, and the input end and the output end of the seventh isolation device Q7 are respectively supplied with power by different voltage sources, so that electrical isolation between the input end and the output end of the seventh isolation device Q7 can be achieved, and crosstalk of interference signals to the second computing and processing unit 41 is avoided.
Referring to fig. 9 in conjunction with fig. 1, the second user IO output processing unit 432 includes an eighth isolation device Q8, an input of the eighth isolation device Q8 is connected to the second calculation processing unit 41; the output end of the eighth isolating device Q8 is connected to the user IO output interface 80, and the input end and the output end of the eighth isolating device Q8 are respectively supplied with power by different voltage sources, so that electrical isolation between the input end and the output end of the eighth isolating device Q8 can be achieved, and crosstalk of interference signals to the second computing and processing unit 41 is avoided.
Further, referring to fig. 1-9, the security controller includes a first power interface 110, a second power interface 120, and a third power interface 130. The first power interface 110, the second power interface 120 and the third power interface 130 are respectively connected to different voltage sources. Specifically, the first power interface 110 is integrated within the system IO input interface. The third power interface 130 is integrated within the user IO input interface.
Further, the input terminal of the first isolation device Q1, the input terminal of the third isolation device Q3, the output terminal of the fifth isolation device Q5, and the output terminal of the seventh isolation device Q7 are all connected to the first power interface 110, and are powered by the voltage source connected to the first power interface 110.
The input terminal of the second isolation device Q2, the input terminal of the fourth isolation device Q4, the output terminal of the sixth isolation device Q6, and the output terminal of the eighth isolation device Q8 are all connected to the third power interface 130, and are powered by a voltage source connected to the third power interface 130.
The output end of the first isolation device Q1, the output end of the third isolation device Q3, the input end of the fifth isolation device Q5, the input end of the seventh isolation device Q7, the output end of the second isolation device Q2, the output end of the fourth isolation device Q4, the input end of the sixth isolation device Q6 and the input end of the eighth isolation device Q8 are all connected with the second power interface 120, and are powered by a voltage source connected with the second power interface 120.
Through the structure arrangement, the input ends and the output ends of the first isolation device Q1-the eighth isolation device Q8 can be respectively supplied with power by different voltage sources only by three voltage sources, and the use amount of the voltage sources is greatly reduced.
With continued reference to fig. 6 in conjunction with fig. 1, the first system IO output processing unit 322 includes a ninth isolation device Q9, an input terminal of the ninth isolation device Q9 is connected to an output terminal of the fifth isolation device Q5 and grounded; the output end of the ninth isolation device Q9 is connected to the first computing unit 31 and the second power interface 120. The ninth isolation device Q9 functions to output loop detection, and when the first calculation processing unit 31 outputs a high level, the first calculation processing unit 31 detects a high level signal in a loop. Meanwhile, based on the above connection manner, the input terminal and the output terminal of the ninth isolation device Q9 are respectively powered by different voltage sources, and the input terminal and the output terminal of the ninth isolation device Q9 are electrically isolated, so that crosstalk of interference signals to the first computing and processing unit 31 is avoided.
With continued reference to fig. 7 in conjunction with fig. 1, the first user IO output processing unit 332 includes a tenth isolation device Q10, an input of the tenth isolation device Q10 is connected to an output of the sixth isolation device Q6 and to ground; the output terminal of the tenth isolation device Q10 is connected to the first computing unit 31 and the second power interface 120. The tenth isolation device Q10 functions to output loop detection, and when the first calculation processing unit 31 outputs a high level, the first calculation processing unit 31 detects a high level signal in a loop. Meanwhile, based on the above connection manner, the input terminal and the output terminal of the tenth isolation device Q10 are respectively powered by different voltage sources, and the input terminal and the output terminal of the tenth isolation device Q10 are electrically isolated, so that crosstalk of interference signals to the first computing and processing unit 31 is avoided.
With continued reference to fig. 8 in conjunction with fig. 1, the second system IO output processing unit 422 includes an eleventh isolation device Q11, an input terminal of the eleventh isolation device Q11 is connected to an output terminal of the seventh isolation device Q7 and is grounded; the output end of the eleventh isolation device Q11 is connected to the second calculation processing unit 41 and the second power interface 120. The eleventh isolation device Q11 functions to output loop detection, and when the second calculation processing unit 41 outputs a high level, the second calculation processing unit 41 loop detects a high level signal. Meanwhile, based on the above connection manner, the input terminal and the output terminal of the eleventh isolation device Q11 are respectively powered by different voltage sources, and the input terminal and the output terminal of the eleventh isolation device Q11 are electrically isolated, so that crosstalk of interference signals to the second computing and processing unit 41 is avoided.
With continued reference to fig. 9 in conjunction with fig. 1, the second user IO output processing unit 432 includes a twelfth isolation device Q12, an input of the twelfth isolation device Q12 is connected to an output of the eighth isolation device Q8 and to ground; the output end of the twelfth isolation device Q12 is connected to the second calculation processing unit 41 and the second power interface 120. The twelfth isolation device Q12 functions to output loop detection, and when the second calculation processing unit 41 outputs a high level, the second calculation processing unit 41 loop detects a high level signal. Meanwhile, based on the above connection manner, the input terminal and the output terminal of the twelfth isolation device Q12 are respectively powered by different voltage sources, and the input terminal and the output terminal of the twelfth isolation device Q12 are electrically isolated, so that crosstalk of interference signals to the second computing and processing unit 41 is avoided.
Through the structure arrangement, the input ends and the output ends of the first isolation device Q1-the twelfth isolation device Q12 can be respectively supplied with power by different voltage sources only by three voltage sources, and the use amount of the voltage sources is greatly reduced.
In the embodiment of the present invention, the first isolation device Q1, the second isolation device Q2, the third isolation device Q3, the fourth isolation device Q4, the fifth isolation device Q5, the sixth isolation device Q6, the seventh isolation device Q7, the eighth isolation device Q8, the ninth isolation device Q9, the tenth isolation device Q10, the eleventh isolation device Q11, and the twelfth isolation device Q12 are all photocouplers. In other embodiments, the first isolation device to the twelfth isolation device may also be another type of isolation device, such as a magnetic isolation device, which is not specifically limited in this embodiment of the present invention.
Referring to fig. 1, further, the first control board 10 further includes a first overcurrent and overvoltage detection unit 34, a second overcurrent and overvoltage detection unit 35, and a third overcurrent and overvoltage detection unit 36. The first calculation processing unit 31 is connected to the first power interface 110, the second power interface 120 and the third power interface 130 through the first overcurrent and overvoltage detection unit 34, the second overcurrent and overvoltage detection unit 35 and the third overcurrent and overvoltage detection unit 36, respectively, to detect whether the power supply current and the power supply voltage of the first power interface 110, the second power interface 120 and the third power interface 130 are normal, and if not, it determines that an abnormal condition occurs, and sends an abnormal alarm message to the user terminal.
Further, the second control board 20 further includes a fourth overcurrent and overvoltage detection unit 44, a fifth overcurrent and overvoltage detection unit 45, and a sixth overcurrent and overvoltage detection unit 46; the second calculation processing unit 41 is connected to the first power interface 110, the second power interface 120 and the third power interface 130 through the fourth overcurrent/overvoltage detection unit 44, the fifth overcurrent/overvoltage detection unit 45 and the sixth overcurrent/overvoltage detection unit 46, respectively, to detect whether the power supply currents and the power supply voltages of the first power interface 110, the second power interface 120 and the third power interface 130 are normal, and if not, it determines that an abnormal condition occurs, and may send an abnormal alarm message to the user terminal.
Referring to fig. 1, the first control board 10 further includes a first watchdog reset circuit 37, and the first watchdog reset circuit 37 is connected to the first calculation processing unit 31. If the first watchdog circuit does not receive the dog feeding signal from the first calculation processing unit 31 within the cycle time, it is determined as a safety failure, and the first watchdog circuit resets the first control board 10.
The second control board 20 further includes a second watchdog reset circuit 47, and the second watchdog reset circuit 47 is connected to the second calculation processing unit 41. If the second watchdog circuit does not receive the dog feeding signal from the second calculation processing unit 41 within the cycle time, it is determined as a safety failure, and the second watchdog circuit resets the second control board 20.
Referring to fig. 1, further, the security controller further includes a communication interface 90, and the communication interface 90 is connected to the first calculation processing unit 31. The security controller may interact with an external IC chip through the communication interface 90. The communication interface 90 may be embodied as an RS485 interface.
Further, the communication interface 90, the system IO input interface 50, the user IO input interface 60, the system IO output interface 70, and the user IO output interface 80 are all disposed on the first control board 10.
Further, the first control board 10 and the second control board 20 are connected by a board-to-board connector 100. The board-to-board connector 100 can efficiently receive cables so that the wiring is more orderly.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A safety controller is characterized by comprising a first control board and a second control board; the first control panel comprises a first computing processing unit, a first system IO input processing unit, a first system IO output processing unit, a first user IO input processing unit and a first user IO output processing unit; the first computing processing unit is respectively connected and electrically isolated with the first system IO input processing unit, the first system IO output processing unit, the first user IO input processing unit and the first user IO output processing unit;
the second control panel comprises a second computing processing unit, a second system IO input processing unit, a second system IO output processing unit, a second user IO input processing unit and a second user IO output processing unit, and the second computing processing unit is respectively connected with and electrically isolated from the second system IO input processing unit, the second system IO output processing unit, the second user IO input processing unit and the second user IO output processing unit;
the first calculation processing unit is connected with the second calculation processing unit.
2. The security controller of claim 1, further comprising a system IO input interface and a user IO input interface;
the first system IO input processing unit comprises a first isolation device, the input end of the first isolation device is connected with the system IO input interface, the output end of the first isolation device is connected with the first computing processing unit, and the input end and the output end of the first isolation device are respectively supplied with power by different voltage sources;
the first user IO input processing unit comprises a second isolation device, the input end of the second isolation device is connected with the user IO input interface, the output end of the second isolation device is connected with the first computing processing unit, and the input end and the output end of the second isolation device are respectively supplied with power by different voltage sources;
the second system IO input processing unit comprises a third isolation device, the input end of the third isolation device is connected with the system IO input interface, the output end of the third isolation device is connected with the second computing processing unit, and the input end and the output end of the third isolation device are respectively supplied with power by different voltage sources;
the second user IO input processing unit comprises a fourth isolation device, the input end of the fourth isolation device is connected with the user IO input interface, the output end of the fourth isolation device is connected with the second computing processing unit, and the input end and the output end of the fourth isolation device are respectively supplied with power by different voltage sources.
3. The safety controller according to claim 2, wherein the first system IO input processing unit further includes a first level shift unit, and an output terminal of the first isolation device is connected to the first computation processing unit through the first level shift unit;
the first user IO input processing unit further comprises a second level conversion unit, and the output end of the second isolation device is connected with the first calculation processing unit through the second level conversion unit;
the second system IO input processing unit further comprises a third level conversion unit, and the output end of the third isolation device is connected with the second calculation processing unit through the third level conversion unit;
the second user IO input processing unit further comprises a fourth level conversion unit; and the output end of the fourth isolation device is connected with the second calculation processing unit through the fourth level conversion unit.
4. The security controller of claim 2, further comprising a system IO output interface and a user IO output interface;
the first system IO output processing unit comprises a fifth isolation device, and the input end of the fifth isolation device is connected with the first calculation processing unit; the output end of the fifth isolation device is connected with the system IO output interface, and the input end and the output end of the fifth isolation device are respectively supplied with power by different voltage sources;
the first user IO output processing unit comprises a sixth isolation device, and the input end of the sixth isolation device is connected with the first computing processing unit; the output end of the sixth isolation device is connected with the user IO output interface, and the input end and the output end of the sixth isolation device are respectively supplied with power by different voltage sources;
the second system IO output processing unit comprises a seventh isolation device, and the input end of the seventh isolation device is connected with the second computing processing unit; the output end of the seventh isolating device is connected with the system IO output interface, and the input end and the output end of the seventh isolating device are respectively supplied with power by different voltage sources;
the second user IO output processing unit comprises an eighth isolating device, and the input end of the eighth isolating device is connected with the second computing processing unit; and the output end of the eighth isolating device is connected with the user IO output interface, and the input end and the output end of the eighth isolating device are respectively supplied with power by different voltage sources.
5. The safety controller of claim 4, wherein the safety controller comprises a first power interface, a second power interface, and a third power interface;
the input end of the first isolation device, the input end of the third isolation device, the output end of the fifth isolation device and the output end of the seventh isolation device are all connected with the first power interface;
the input end of the second isolation device, the input end of the fourth isolation device, the output end of the sixth isolation device and the output end of the eighth isolation device are all connected with the third power interface;
the output end of the first isolation device, the output end of the third isolation device, the input end of the fifth isolation device, the input end of the seventh isolation device, the output end of the second isolation device, the output end of the fourth isolation device, the input end of the sixth isolation device and the input end of the eighth isolation device are all connected with a second power supply interface.
6. The safety controller according to claim 5, wherein the first system IO output processing unit comprises a ninth isolation device, an input terminal of the ninth isolation device is connected to an output terminal of the fifth isolation device and grounded; the output end of the ninth isolation device is connected with the first computing processing unit and the second power interface;
the first user IO output processing unit comprises a tenth isolation device, and the input end of the tenth isolation device is connected with the output end of the sixth isolation device and grounded; the output end of the tenth isolating device is connected with the first computing processing unit and the second power interface;
the second system IO output processing unit comprises an eleventh isolation device, and the input end of the eleventh isolation device is connected with the output end of the seventh isolation device and grounded; the output end of the eleventh isolating device is connected with the second computing processing unit and the second power supply interface;
the second user IO output processing unit comprises a twelfth isolation device, and the input end of the twelfth isolation device is connected with the output end of the eighth isolation device and grounded; and the output end of the twelfth isolating device is connected with the second computing processing unit and the second power supply interface.
7. The safety controller according to claim 6, wherein the first control board further comprises a first overcurrent and overvoltage detection unit, a second overcurrent and overvoltage detection unit and a third overcurrent and overvoltage detection unit; the first computing and processing unit is connected with the first power interface, the second power interface and the third power interface respectively through the first overcurrent and overvoltage detection unit, the second overcurrent and overvoltage detection unit and the third overcurrent and overvoltage detection unit;
the second control board further comprises a fourth overcurrent and overvoltage detection unit, a fifth overcurrent and overvoltage detection unit and a sixth overcurrent and overvoltage detection unit; the second calculation processing unit is connected with the first power interface, the second power interface and the third power interface through the fourth overcurrent and overvoltage detection unit, the fifth overcurrent and overvoltage detection unit and the sixth overcurrent and overvoltage detection unit respectively.
8. The security controller of claim 1, wherein the first control board further comprises a first watchdog reset circuit, the first watchdog reset circuit being connected to the first computational processing unit.
9. The safety controller according to claim 1, wherein the second control board further comprises a second watchdog reset circuit, and the second watchdog reset circuit is connected with the second calculation processing unit.
10. The security controller of claim 5, further comprising a communication interface, the communication interface being connected to the first computational processing unit; the communication interface, the system IO input interface, the user IO input interface, the system IO output interface and the user IO output interface are all arranged on the first control board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121594913.2U CN215729353U (en) | 2021-07-13 | 2021-07-13 | Safety controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121594913.2U CN215729353U (en) | 2021-07-13 | 2021-07-13 | Safety controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215729353U true CN215729353U (en) | 2022-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121594913.2U Active CN215729353U (en) | 2021-07-13 | 2021-07-13 | Safety controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215729353U (en) |
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2021
- 2021-07-13 CN CN202121594913.2U patent/CN215729353U/en active Active
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