Extensible single-pole single-throw switch system based on LXI bus
By adopting the CPCI backplane and LXI bus single-pole single-throw switch system, the problems of high cost and inconvenient maintenance are solved, and a low-cost, easy-to-expand and maintain single-pole single-throw switch system is realized.
Patent Information
- Application Number
- CN202423046703.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-10
AI Technical Summary
Existing single-pole, single-throw switch systems are expensive and difficult to maintain, especially the PXI system, whose wiring method is unsightly and cumbersome to disassemble.
The system body is composed of a CPCI backplane and 3U CPCI slots, which are controlled via the LXI bus. The switch module signal is directly led out of the backplane connector and connected to the switch using an RJ45 Ethernet connector. The backplane provides power and is designed to be expandable to 5-slot, 10-slot, 20-slot, etc., reducing cable clutter.
The hardware cost is reduced to one tenth of the original cost, the equipment is easy to maintain and expand, and the versatility and aesthetics of the system are improved.
Smart Images
Figure CN223486379U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of measurement and control technology, and relates to an expandable single-pole single-throw switch system based on the LXI bus. Background Technology
[0002] The common implementation method of single-pole single-throw switch system is as follows: it consists of a 3U PXI chassis, a controller and a single-pole double-throw module. The PXI chassis and controller form a PXI control system. The single-pole single-throw switch is a PXI or PXIe bus, which is plugged into the PXIe chassis hybrid slot and led out through the module panel to a unified connector. The PXI control system controls the switch module through the Windows operating system and related module drivers.
[0003] Leveraging the modular design of PXI control systems, many ready-made rack modules are available on the market, such as those from NI and Shanghai Jianyi, making it easy to build the entire switching system's hardware and software. However, the high cost of PXI chassis, controllers, and even single-pole double-throw (SPDT) modules makes building such a system very expensive; a 10-slot SPDT switching system is estimated to cost over 150,000 RMB. Furthermore, because PXI systems use wiring from the module panels, the wiring becomes unsightly when there are many modules, and each module removal requires disconnecting the cable connectors, making maintenance inconvenient. Therefore, optimization of the switching system is necessary. Utility Model Content
[0004] Utility Model Purpose
[0005] The purpose of this invention is to provide a novel single-pole single-throw switch system that facilitates installation between the chassis and the controller, makes maintenance easier, and improves system stability.
[0006] Technical solution
[0007] A scalable single-pole single-throw switch system based on the LXI bus comprises a CPCI backplane and three UCPCI slots forming the main body of the system, creating independent module slots. A single-pole double-throw switch module is inserted into the slot and connected to the backplane slot connector, drawing power from the backplane for operation. The switching signal is connected to the test interface via a connector on the backplane. The single-pole single-throw switch module's front panel has an RJ45 standard Ethernet connector, which connects to a gigabit Ethernet switch via a network cable, forming a local LXI bus network. The gigabit network is controlled by a host computer through an external Ethernet interface. The system includes a power module to provide secondary power to the gigabit Ethernet switch and backplane.
[0008] Furthermore, the CPCI backplane uses a back-to-back DIN41612 96-pin connector; the switching module signals are directly led out without passing through the backplane printed circuit board traces, reducing signal attenuation and other problems caused by PCB traces.
[0009] Furthermore, the backplane distributes the input DC power—±15V and 5V—to each slot connector to power the switching module.
[0010] Furthermore, the CPCI backplane uses a rear panel cabling method to bring out the switch signals. This allows for fixed and consistent wiring, resulting in neat and uniform cabling and reducing cable clutter.
[0011] Furthermore, the back panel design can be customized to have 5, 10, or 20 slots as needed.
[0012] Furthermore, the single-pole single-throw switch module can be inserted into the socket in an independent form, and the number of switch modules can be increased or decreased as needed to form an expansion space that can be flexibly configured to increase or decrease.
[0013] The beneficial effects of this application are as follows:
[0014] a) This new type of wiring exits through the back panel, which makes the wiring fixed and unchanging, and the wiring can be neat and uniform, reducing the mess of cables. This makes it convenient for equipment maintenance without having to worry about the signal connector connection when maintaining the board module.
[0015] b) Using an LXI bus to form a distributed network makes the system's controllers more versatile and easier to use, greatly improving the system's versatility and thus reducing costs.
[0016] c) The cost of the new main hardware can be reduced to one-tenth of that of the PXI architecture, which has great economic value.
[0017] d) This invention has strong scalability and interchangeability. By replacing the switch modules, different types and quantities of switch systems can be formed, making the application range of the equipment extremely wide. Attached Figure Description
[0018] Figure 1 Design diagrams for hardware solutions;
[0019] Figure 2 This is a schematic diagram of a slot connector. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be described in more detail below with reference to the embodiments of this utility model. In the examples, the same or similar reference numerals denote the same or similar components or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this utility model. The embodiments described below with reference to the embodiments are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. The embodiments of this utility model will be described in detail below with reference to their specific implementation.
[0021] This new system consists of a CPCI backplane and 3U CPCI slots, forming independent module slots. A single-pole double-throw (SPDT) switch module is inserted into the slot and connected to the backplane slot connector, drawing power from the backplane for operation. Switch signals are connected to the test interface via connectors on the back of the backplane. The SPDT switch module's panel has an RJ45 standard Ethernet connector, connecting to a gigabit Ethernet switch via a network cable. This forms a local LXI bus network, with the gigabit network controlled by a host computer through an external Ethernet interface. A power module is provided to supply secondary power to the gigabit Ethernet switch and backplane. The CPCI backplane uses back-to-back DIN41612 96-pin connectors, directly leading the switch module signals without PCB traces, reducing signal attenuation issues caused by PCB routing. Simultaneously, the backplane distributes the input DC power (±15V and 5V) to each slot connector to power the switch module. The CPCI backplane uses a rear panel wiring method, allowing for fixed wiring, neat and uniform cabling, and reducing cable clutter. The backplate design can be configured with 5 slots, 10 slots, 20 slots, etc., as needed. The single-pole single-throw switch module can be inserted into the box in an independent working form. The number of switch modules can be increased or decreased as needed to form a flexible expansion space that can be added or reduced.
[0022] The backplane slot uses a DIN41612 connector, with a 13mm long pin passing directly through the backplane to bring out the interface pins. Then, the DIN41612 connector housing is fitted, forming a back-to-back connector. The switch signal is connected to the test interface, bypassing the backplane PCB and exiting through the slot connector, reducing the impact of PCB attenuation and damage on the signal. A schematic diagram of the slot connector is shown below. Figure 2 .
[0023] The system uses an LXI bus for control. All boards and modules are centrally connected to a gigabit Ethernet switch via network cables, and then connected to an external communication port through the switch. The controller can then easily control the system through this communication interface. This distributed control method eliminates the need to specify the brand or architecture of the controller; as long as it complies with the LXI bus protocol, it can be linked and controlled. Therefore, it facilitates easy networking and control, greatly improving the versatility of the equipment and reducing costs.
[0024] Example
[0025] The backplane slot uses a DIN41612 connector, and a 13mm long pin is used to directly pass through the backplane to bring out the interface pins. Then, the DIN41612 connector housing is put on to form a back-to-back connector. The switch signal is connected to the test interface. The switch signal does not pass through the backplane PCB, but is brought out through the slot connector to reduce the influence of factors such as signal attenuation and damage caused by the PCB on the board.
[0026] The system adopts a CPCI slot structure, and the single-pole single-throw module adopts a 3U standard CPCI size design. It is controlled by an LXI bus and features scalability, easy maintenance, and low cost.
[0027] 1) Backplane Design: The CPCI backplane uses back-to-back DIN41612 96-pin connectors, directly leading out the switch module signals without routing through the backplane printed circuit board, reducing signal attenuation issues caused by PCB traces. Simultaneously, the backplane distributes the input DC power (±15V, 5V) to each slot connector to power the switch modules. The CPCI backplane uses a rear panel wiring method to lead out the switch signals, allowing for fixed wiring, neat and uniform cabling, and reducing cable clutter. The backplane design can be configured with 5, 10, or 20 slots as needed. Single-pole single-throw switch modules are inserted into the slot box in an independent working manner. The number of switch modules can be increased or decreased as needed, creating a flexible configurable expansion space.
[0028] 2) Backplane slot connector selection: This new type uses DIN41612 connector as slot connector. The connector uses a 13mm long pin to directly pass through the hole to the other side, and then the DIN41612 connector shell is put on to form a back-to-back connector, which can reduce the influence of PCB on the board on signal attenuation and damage.
[0029] 3) Control Bus Design: This new design uses an LXI bus for control. All board modules are centrally connected to a gigabit Ethernet switch via network cables, and then connected to an external communication port through the switch. The controller can then easily control the devices via the communication interface. This distributed control method eliminates the need to specify the controller brand or architecture; as long as the LXI bus protocol is met, linking and control are possible. Therefore, networking and control are very convenient, greatly improving the versatility of the equipment and reducing costs.
[0030] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless defined as herein. The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this invention. It should be understood that the above descriptions are merely specific embodiments of this invention and are not intended to limit this invention. Within the spirit and principles of this invention, any person skilled in the art may modify or alter the disclosed technical content to create equivalent embodiments applicable to other fields. However, any simple modifications, equivalent changes, alterations, modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the technical essence of this invention without departing from the content of the technical solution of this invention should be included within the protection scope of this invention.
Claims
1. A scalable single-pole single-throw switch system based on an LXI bus, characterized in that, The main body of the system consists of a CPCI backplane and 3 UCPCI slots, forming independent module slots. The single-pole double-throw switch module is inserted into the slot and connected to the backplane slot connector. It operates by drawing power from the backplane, and the switching signal is connected to the test interface through the connector lead on the back of the backplane. The single-pole double-throw switch module has an RJ45 standard Ethernet connector on its front panel. It is connected to the gigabit Ethernet switch through a network cable to form a local LXI bus network. The gigabit network is controlled by the host computer through the external Ethernet interface. The system provides a power module to provide secondary power to the gigabit Ethernet switch and backplane.
2. The system as described in claim 1, characterized in that, The CPCI backplane uses a back-to-back DIN41612 96-pin connector; the switch module signals are directly led out without passing through the backplane printed circuit board traces.
3. The system as described in claim 2, characterized in that, The backplane distributes the input DC power (±15V, 5V) to each slot connector to power the switching module.
4. The system as described in claim 3, characterized in that, The CPCI backplane uses a rear panel wiring method to bring out the switch signals.
5. The system as described in claim 4, characterized in that, The back panel can be designed with 5 slots, 10 slots, or 20 slots as needed.
6. The system as described in claim 5, characterized in that, The single-pole single-throw switch module is inserted into the socket in a self-contained form. The number of switch modules can be increased or decreased as needed to form a flexible configuration expansion space.