Relay card and signal conditioning box based on serial bus RS485

Abstract

The utility model relates to a relay card, concretely relates to a relay card and signal conditioning box based on serial bus RS485. The relay card includes relay card body and installs the baffle, is provided with the electrical interface, signal module and debugging interface connected in proper order on the relay card body, the electrical interface includes power supply interface and communication interface, the power supply interface is connected with the power supply outside, the debugging interface is connected with the burner, the relay card body is installed in the signal conditioning box through the installation baffle, the relay card body adopts standard 3U printed board to make, the electrical interface adopts DIN96 connector, the signal module includes a plurality of signal relays, the communication interface adopts RS485 communication interface, the communication interface is connected with the RS485 control bus outside, is used for receiving the control instruction of RS485 control bus input outside. The relay card adopts signal relay and reduces the influence to millivolt signal accuracy, satisfies the need.

Description

Technical Field

[0001] This utility model relates to a relay card and a signal conditioning box, specifically to a relay card and a signal conditioning box based on the RS485 serial bus. Background Technology

[0002] The electronic controller test equipment project is a special test equipment developed for electronic controllers. The test equipment needs to provide discrete signals and millivolt signals to the electronic controller, and the millivolt signals need to have switching capabilities.

[0003] The testing equipment uses a discrete signal control board to control a power relay to switch between discrete signal output and millivolt signal on / off. The selected power relay model is Phoenix Contact PLC-RSC-24DC / 21. However, during the test, this solution achieves the function of switching the millivolt signal on / off after the power relay is switched, but it cannot meet the accuracy requirements of the millivolt signal. Utility Model Content

[0004] To address the technical problem that existing relay cards cannot meet the accuracy requirements of millivolt signals, this invention provides a relay card and signal conditioning box based on the RS485 serial bus.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A relay card based on RS485 serial bus includes a relay card body; the relay card body is provided with an electrical interface, a signal module and a debugging interface connected in sequence. The electrical interface includes a power supply interface and a communication interface; the power supply interface is connected to an external power supply; the debugging interface is used for programming relay cards and is connected to a programmer. Its special feature is: Includes a mounting baffle installed at one end of the relay card body; the relay card body is installed in the signal conditioning box via the mounting baffle; The relay card body is made of a standard 3U printed circuit board; The electrical interface uses a DIN96 connector and is installed on the other end of the relay card body; The signal module includes multiple signal relays; The communication interface adopts an RS485 communication interface; the communication interface is connected to an external RS485 control bus and is used to receive control commands input from the external RS485 control bus.

[0006] Furthermore, a plurality of first through holes are provided on one side edge of the relay card body, and a plurality of first threaded holes are provided on the mounting baffle; the plurality of first threaded holes correspond to the plurality of first through holes; the relay card body is assembled with the mounting baffle by screws.

[0007] Furthermore, there are two of each of the first through hole and the first screw hole; The two first through holes are respectively provided on both sides of one end face of the relay card body along the width direction; The mounting baffle has two second through holes at both ends along its length; the inner side of the mounting baffle has two L-shaped mounting plates, and one end of each mounting plate has a second screw hole. The two mounting plates are assembled with the mounting baffle using screws through two second through holes and two second screw holes; The two first screw holes are respectively located at the other end of the two mounting plates; The mounting baffle is provided with two third through holes at both ends along its length. The mounting baffle is installed in the signal conditioning box using screws through the two third through holes.

[0008] Furthermore, the number of signal relays is 32; an array of 32 signal relays is provided.

[0009] In addition, this utility model also provides a signal conditioning box, which is special in that: Includes the signal conditioning box body and multiple crossbeams; Multiple crossbeams are arranged parallel to each other inside the signal conditioning box body, and multiple slots are provided between two adjacent crossbeams. The multiple slots are evenly distributed along the length of the crossbeam. Each of the aforementioned card slots is equipped with a relay card based on the RS485 serial bus, and the relay card body is connected to the signal conditioning box body through a mounting baffle.

[0010] The beneficial effects of this utility model are: 1. The use of signal relays reduces the impact on the accuracy of millivolt signals, meeting the usage requirements.

[0011] 2. Power relays occupy a large amount of space, while signal relays occupy a small amount of space. Replacing power relays with signal relays reduces the weight of the conditioning box and increases the usable space. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a relay card embodiment based on the RS485 serial bus according to this utility model; Figure 2This is a schematic diagram illustrating the connection between a relay card based on the RS485 serial bus and an industrial control computer according to this utility model. Figure 3 This is a schematic diagram of the connection between an existing power relay and an industrial control computer; Figure 4 This is a schematic diagram of the mounting baffle in an embodiment of a relay card based on a serial bus RS485 according to this utility model; Figure 5 This is a schematic diagram of a relay card based on the RS485 serial bus and an existing power relay installed on a signal conditioning box.

[0013] The attached figures are labeled as follows: 1-Relay card body, 11-Electrical interface, 12-Signal module, 13-Debugging interface, 14-First through hole 2- Mounting baffle, 21- First screw hole, 22- Second through hole, 23- Second screw hole, 24- Third through hole, 25- Mounting plate; 3-Crossbeam, 4-Slot. Detailed Implementation

[0014] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0015] This utility model provides a relay card based on the RS485 serial bus, such as... Figure 1 As shown, it includes a relay card body 1 and a mounting baffle 2 installed at one end of the relay card body 1.

[0016] The relay card body 1 is made of a standard 3U printed circuit board, which measures 160mm in length and 100mm in width. The relay card body 1 is provided with an electrical interface 11, a signal module 12, and a debugging interface 13 connected in sequence.

[0017] Electrical interface 11 uses a DIN96 connector and is mounted on the other end of the relay card body 1; see [link / reference] Figure 2 Specifically, the electrical interface 11 includes a power supply interface 11 and a communication interface 11.

[0018] The power supply interface 11 is connected to an external 24VDC power supply; the communication interface adopts an RS485 communication interface, which is connected to an external RS485 control bus to receive control commands input from the external RS485 control bus.

[0019] Signal module 12 includes 32 signal relays; the 32 signal relays are arranged in an array. The signal relays are mounted on the relay card body 1 via through holes and connected through solder pads on the relay card body 1.

[0020] See Figure 2 Let com be the common terminal of the signal relay, no be the normally open terminal of the signal relay, and nc be the normally closed terminal of the signal relay. The industrial control computer controls the relay card body 1 via RS485. The relay card body 1 receives RS485 commands and controls the signal relay to output switching signals.

[0021] Using the connection method described in this embodiment, the connection can be completed in two weeks. Compared to existing power relay connection methods, see [link to documentation]. Figure 3 The industrial control computer controls the relay output through discrete signal cards. The procurement cycle for discrete signal cards is 4 to 6 weeks, which is relatively long.

[0022] Debugging interface 13 is used for programming relay cards and is connected to the programmer.

[0023] The relay card body 1 is installed in the signal conditioning box via the mounting baffle 2.

[0024] See Figure 4 Specifically, a plurality of first through holes 14 are provided on one side edge of the relay card body 1. In this embodiment, there are two first through holes 14 and two first screw holes 21. The two first through holes 14 are respectively provided on both sides of the end face of one side of the relay card body 1 along the width direction. The mounting baffle 2 is provided with two second through holes 22 at both ends along its length direction. The inner side of the mounting baffle 2 is provided with two L-shaped mounting plates 25, and one end of the two mounting plates 25 is provided with two second screw holes 23. The two mounting plates 25 are assembled with the mounting baffle 2 using screws through the two second through holes 22 and the two second screw holes 23. The other end of each of the two mounting plates 25 is provided with a first threaded hole 21, and the two first through holes 14 corresponding to the first threaded hole 21 are respectively; the relay card body 1 is assembled with the mounting baffle 2 by screws.

[0025] The mounting baffle 2 is provided with two third through holes 24 at both ends along its length. The mounting baffle 2 is installed in the signal conditioning box using screws through the two third through holes 24.

[0026] See Figure 5In the prior art, the signal conditioning box body is usually provided with multiple guide rails, and multiple power relays are respectively provided on the multiple guide rails. However, since the power relays are heavy and bulky, the use of a large number of power relays will result in a large overall weight and volume of the signal conditioning box body. Therefore, based on the prior art, this embodiment uses signal relays instead of power relays.

[0027] Specifically, the configuration is as follows: multiple crossbeams 3 are set in the signal conditioning box; the multiple crossbeams 3 are set parallel to each other in the signal conditioning box body, and multiple slots 4 are set between two adjacent crossbeams 3, and the multiple slots 4 are evenly arranged along the length direction of the crossbeams 3; a relay card based on the RS485 serial bus is set in each of the multiple slots 4, and the relay card body 1 is connected to the signal conditioning box body through the mounting baffle 2.

[0028] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A relay card based on RS485 serial bus, comprising a relay card body (1); the relay card body (1) is provided with an electrical interface (11), a signal module (12) and a debugging interface (13) connected in sequence; The electrical interface (11) includes a power supply interface and a communication interface; the power supply interface is connected to an external power supply; the debugging interface (13) is used for relay card program burning and is connected to a programmer. Its features are: Includes a mounting baffle (2) installed at one end of the relay card body (1); the relay card body (1) is installed in the signal conditioning box via the mounting baffle (2); The relay card body (1) is made of a standard 3U printed circuit board; The electrical interface (11) adopts a DIN96 connector and is installed at the other end of the relay card body (1); The signal module (12) includes multiple signal relays; The communication interface adopts an RS485 communication interface; the communication interface is connected to an external RS485 control bus and is used to receive control commands input from the external RS485 control bus.

2. The relay card based on RS485 serial bus according to claim 1, characterized in that: The relay card body (1) has a plurality of first through holes (14) on one side edge, and the mounting baffle (2) has a plurality of first screw holes (21); the plurality of first screw holes (21) correspond to the plurality of first through holes (14); the relay card body (1) is assembled with the mounting baffle (2) by screws.

3. The relay card based on RS485 serial bus according to claim 2, characterized in that: There are two of each of the first through hole (14) and the first screw hole (21); The two first through holes (14) are respectively provided on both sides of the end face of one side of the relay card body (1) along the width direction; The mounting baffle (2) has two second through holes (22) at both ends along its length; the mounting baffle (2) has two L-shaped mounting plates (25) on its inner side, and one end of each mounting plate (25) has a second screw hole (23). The two mounting plates (25) are assembled with the mounting baffle (2) using screws through two second through holes (22) and two second screw holes (23); The two first screw holes (21) are respectively located at the other end of the two mounting plates (25); The mounting baffle (2) has two third through holes (24) at both ends along its length direction. The mounting baffle (2) is installed in the signal conditioning box by screws through the two third through holes (24).

4. The relay card based on RS485 serial bus according to claim 1, characterized in that: The number of signal relays is 32; the array of 32 signal relays is configured.

5. A signal conditioning box, characterized in that: Includes the signal conditioning box body and multiple crossbeams (3); Multiple crossbeams (3) are arranged parallel to each other in the signal conditioning box body, and multiple slots (4) are provided between two adjacent crossbeams (3). The multiple slots (4) are evenly arranged along the length of the crossbeams (3). Each of the multiple card slots (4) is provided with a relay card based on RS485 serial bus as described in any one of claims 1-4, and the relay card body (1) is connected to the signal conditioning box body through a mounting baffle (2).

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