Universal injection molding expansion board system

Abstract

The invention discloses a universal injection molding expansion board system which comprises a hand controller, a pulse / CANopen / EtherCAT / drive and control integrated main board, a European expansion board and an IO expansion board. The European extension board is in communication interaction with the pulse / CANopen / EtherCAT / drive and control integrated main board through a CAN (Controller Area Network) bus, and IO (Input / Output) information is transmitted to the pulse / CANopen / EtherCAT / drive and control integrated main board; the hand controller is in communication interaction with the pulse / CANopen / EtherCAT / driving and control integrated main board through an RS422 interface; the hand controller monitors signal input of the European extension board in real time and controls signal output of the European extension board. External European standard injection molding machine signals are accessed to the European standard expansion board; the IO expansion board is connected with the European expansion board; original three European standard products are reduced to one, the problem that a driving and control integrated European standard host is difficult to develop is solved, and product compatibility and application flexibility are improved. When the European standard board needs to be used, a special European standard board does not need to be replaced, only one European standard expansion board needs to be additionally arranged on a standard product, and application is more flexible.

Description

Technical Field

[0001] The invention relates to the technical field related to an injection molded part removal robot system, and in particular to a universal injection molding expansion plate system. Background Art

[0002] During the use of the injection molding machine robot, part of the injection molding machine signal must be connected to the robot for control, so as to achieve real-time monitoring of the injection molding machine status and ensure that the robot and the injection molding machine can cooperate under safe conditions. However, there are certain differences in the definitions of the injection molding machine signals connected to the robot at home and abroad. Foreign injection molding machines generally use European Standard 67 or European Standard 12, while China defines another set of standards based on its own usage. There are significant differences between the input and output signals and logical functions of the European standards. For injection molding machines that need to use European standards, the software and hardware solutions must be redesigned according to the European signals and logic.

[0003] The traditional expansion board has three schemes according to the different control modes: pulse, bus, and integrated drive and control. Each scheme has its own independent software and hardware. The existing European standard product design idea is: on top of the original three control schemes, each one adds European standard models, and its product form is as follows: Product 1: hand controller + pulse European standard motherboard; Product 2: hand controller + bus European standard motherboard; Product 3: hand controller + integrated drive and control European standard host. The above-mentioned European standard scheme has many defects, the specific defects are as follows: 1. The European standard board is incompatible with the standard board, and the software and hardware are developed separately. Customers choose different products according to different needs. 2. The integrated drive and control product has many hardware and structural changes and is difficult to design. At present, there is no special development. 3. The traditional solution has many product models and types, and internal control is difficult. Customers also have certain troubles in selection and use. Summary of the invention

[0004] In order to solve the defects in the prior art, the present invention provides a universal injection molding expansion plate system.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] The present invention discloses a universal injection molding expansion board system, comprising a hand controller, a pulse / CANopen / EtherCAT / drive control integrated mainboard, a European expansion board and an IO expansion board;

[0007] The European expansion board communicates and interacts with the pulse / CANopen / EtherCAT / drive-control integrated main board through the CAN bus, and transmits IO information to the pulse / CANopen / EtherCAT / drive-control integrated main board;

[0008] The hand controller communicates and interacts with the pulse / CANopen / EtherCAT / drive-control integrated mainboard via the RS422 interface; the hand controller monitors the signal input of the European expansion board in real time and controls the signal output of the European expansion board;

[0009] The European standard expansion board is connected to the external European standard injection molding machine signal;

[0010] The IO expansion board is connected to the European expansion board; the signal on the European expansion board meets the European standard requirements.

[0011] As a preferred technical solution of the present invention, the European standard expansion board includes a signal processor model GD32F103RBT6, The signal processor is provided with a CAN interface for connecting to a CAN bus, and the signal processor is also provided with a plurality of European standard injection molding machine input signal interfaces and a plurality of injection molding machine output signal interfaces; Several of the European standard injection molding machine input signal interfaces include a safety door signal input interface, a mold opening completion signal input interface, a mold closing completion signal input interface, an ejector in-position signal input interface, an ejector retracted position signal input interface, a mold opening signal input interface, a reserved / middle plate mold input interface, a core entry stop signal input interface, a core exit stop signal input interface, an emergency stop input signal input interface, and a defective product signal input interface; Several of the European standard injection molding machine output signal interfaces include a mold closing signal output interface, a mold closing signal output interface, an allowable push-in signal output interface, an allowable push-out signal output interface, a mold area safety signal output interface, a neutron movement to allow the robot to enter signal output interface, a neutron movement to allow the robot to enter signal output interface, a neutron movement to allow the robot to take the injection molded product signal output interface, a reserved signal output interface, and a connection interface connected to a 4-wire dip switch.

[0015] As a preferred technical solution of the present invention, each of the European standard injection molding machine input signal interfaces is connected to the European standard injection molding machine signal via an optical coupling isolation module.

[0016] As a preferred technical solution of the present invention, the optical coupling isolation module includes a photoelectric coupler U1, resistors R1, R2, R3, R4 and R5, and capacitors C1 and C2;

[0017] One end of the resistor R1, one end of the resistor R2 and one end of the capacitor C1 are all connected to pin 4 of the photocoupler U1, and the other end of the resistor R1 is connected to the vcc3.3v voltage; the other end of the resistor R2 is connected to the input signal pin of the signal processor, the other end of the capacitor C1 is grounded, and one end of the resistor R3, one end of the capacitor C2 and one end of the resistor R4 are all connected to pin 1 of the photocoupler U1, and the other end of the capacitor C2, the other end of the resistor R4 and one end of the resistor R5 are connected to pin 2 of the photocoupler U1;

[0018] The other end of the resistor R3 and the other end of the resistor R5 are both connected to the input signal interface of the European standard injection molding machine; the 3rd pin of the photoelectric coupler is grounded.

[0019] As a preferred technical solution of the present invention, each of the injection molding machine output signal interfaces is connected to the European standard injection molding machine signal via a relay isolation module.

[0020] As a preferred technical solution of the present invention, the relay isolation module includes a photoelectric coupler U2, a relay U3, a resistor R6 and a diode D1;

[0021] One end of the resistor R6 is connected to pin 2 of the photocoupler U2, and the other end of the resistor R6 is connected to the European standard injection molding machine output signal interface on the European standard expansion board, pin 1 of the photocoupler U2 is connected to the vcc5V voltage, pin 3 of the photocoupler U2 is grounded, pin 4 of the photocoupler U2 is connected to the anode of the diode D1 and pin 1 of the relay, the cathode of the diode D1 and pin 2 of the relay U3 are connected to the 24v voltage, and pins 3 and 4 of the relay U3 are connected to the injection molding machine output signal.

[0022] As a preferred technical solution of the present invention, the European standard expansion board is provided with a CAN bus connection circuit, which includes a CAN transceiver U4, capacitors C3 and C4, resistors R7 and R8, diodes D2 and D3, and a common mode inductor L. One end of the capacitor C3 is connected to the 3 pin of the CAN transceiver U4 and is connected to VCC5V at the same time. The other end of the capacitor C3 is grounded, one end of the resistor R7 is connected to the RXD pin of the CAN transceiver U4, one end of the resistor R8 is grounded, and the other end of the resistor R8 is connected to the other end of the resistor R7, and is connected to the CAN_1RX pin on the signal processor. The TXD pin of the CAN transceiver U4 is connected to the CAN_1TX on the signal processor, and one end of the capacitor C3 is connected to the 1 pin of the CAN transceiver U4, and the other end of the capacitor C3 is grounded.

[0023] The CANH pin and CANL pin of the CAN transceiver are connected via pins 1 and 3 of the common-mode inductor L, pins 2 and 4 of the common-mode inductor L are communicatively connected to the pulse / CANopen / EtherCAT / drive-control integrated mainboard, and the anode of the diode D3 and the anode of the diode D4 are grounded, and the cathode of the diode D3 is connected to the CANH pin of the CAN transceiver, and the cathode of the diode D4 is connected to the CANL pin of the CAN transceiver.

[0024] As a preferred technical solution of the present invention, an RE232 debugging interface is reserved on the European standard expansion board.

[0025] The beneficial effects of the present invention are:

[0026] This universal injection molding expansion board system adds a European expansion board to the existing pulse / CANopen / EtherCAT / drive-control integrated mainboard, wherein the signals on the European expansion board meet the European requirements, wherein the European expansion board is directly connected to the existing pulse / CANopen / EtherCAT / drive-control integrated mainboard via the CAN communication interface, wherein the pulse / CANopen / EtherCAT / drive-control integrated mainboard shares a European expansion board, thereby reducing product types and increasing product extensibility; the present invention reduces the original three European products to one, and solves the problem that the drive-control integrated European host is difficult to develop, thereby improving product compatibility and application flexibility. When the European board is needed, there is no need to replace the dedicated European board, but only to add a European expansion board to the standard product, which makes the application more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0028] In the attached picture:

[0029] Figure 1 It is a system block diagram of a universal injection molding expansion board system of the present invention;

[0030] Figure 2 It is a structural schematic diagram of a standard expansion board of a universal injection molding expansion board system of the present invention;

[0031] Figure 3 It is a structural schematic diagram of a signal processor of a universal injection molding expansion board system of the present invention;

[0032] Figure 4 It is a circuit diagram of an optocoupler isolation module of a universal injection molding expansion board system of the present invention;

[0033] Figure 5It is a circuit diagram of a relay isolation module of a universal injection molding expansion board system of the present invention;

[0034] Figure 6 The invention discloses a circuit diagram of a CAN bus connection circuit of a universal injection molding expansion board system.

[0035] In the figure: 1. Hand controller; 2. Pulse / CANopen / EtherCAT / drive control integrated mainboard; 3. European expansion board; 4. IO expansion board; 5. CAN interface; 6. Safety door signal input interface; 7. Mold opening completion signal input interface; 8. Mold closing completion signal input interface; 9. Ejector in place signal input interface; 10. Ejector retracted signal input interface; 11. Mold opening signal input interface; 12. Reserved / middle plate mold input interface; 13. Core entry stop signal input interface; 14. Core exit stop signal input interface; 15. Emergency stop input signal input interface; 16. Mold closing signal output interface; 17. Mold closing signal output interface; 18. Ejection allowance signal output interface; 19. Ejection allowance signal output interface; 20. Mold area safety signal output interface; 21. Neutron movement to allow the robot to run signal output interface; 22. Reserved signal output interface; 23. Connection interface; 26. Defective product signal input interface; 28. RE232 debugging interface. DETAILED DESCRIPTION

[0036] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0037] Example: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the present invention provides a universal injection molding expansion plate system, such as Figure 1 As shown, it includes a hand controller 1, a pulse / CANopen / EtherCAT / drive control integrated mainboard 2, a European expansion board 3 and an IO expansion board 4;

[0038] The European expansion board 3 communicates and interacts with the pulse / CANopen / EtherCAT / drive-control integrated main board 2 via the CAN bus, and transmits IO information to the pulse / CANopen / EtherCAT / drive-control integrated main board 2;

[0039] The hand controller 1 communicates and interacts with the pulse / CANopen / EtherCAT / drive-control integrated mainboard 2 via the RS422 interface; the hand controller 1 monitors the signal input of the European expansion board 3 in real time and controls the signal output of the European expansion board 3;

[0040] The European standard expansion board 3 is connected to the external European standard injection molding machine signal;

[0041] The IO expansion board 4 is connected to the European expansion board 3; the signal on the European expansion board 3 meets the European regulation requirements.

[0042] The present invention adds a European standard expansion board 3 to the existing pulse / CANopen / EtherCAT / drive-control integrated mainboard 2, wherein the signal on the European standard expansion board 3 meets the European standard requirements, wherein the European standard expansion board 3 is directly connected to the existing pulse / CANopen / EtherCAT / drive-control integrated mainboard 2 through the CAN communication interface, wherein the pulse / CANopen / EtherCAT / drive-control integrated mainboard 2 shares a European standard expansion board 3, thereby reducing product types and increasing product extensibility; the present invention reduces the original three European standard products to one, and solves the problem that the drive-control integrated European standard host is difficult to develop, thereby improving product compatibility and application flexibility. When the European standard board is needed, there is no need to replace the special European standard board, and only a European standard expansion board needs to be added to the standard product, which is more flexible in application.

[0043] Among them, the European standard expansion board 3 includes a signal processor with model number GD32F103RBT6.

[0044] like Figure 2 As shown, the signal processor is provided with a CAN interface for connecting to a CAN bus, and the signal processor is also provided with a plurality of European standard injection molding machine input signal interfaces and a plurality of injection molding machine output signal interfaces; in this way, various signals on the European standard injection molding machine are received through a plurality of European standard injection molding machine input signal interfaces, and various signals on the injection molding machine are controlled through the injection molding machine output signal interface, so that the injection molding machine can control various devices in the injection molding machine system according to the injection molding machine output signal output by the European standard expansion board.

[0045] Several of the European standard injection molding machine input signal interfaces include a safety door signal input interface 6, a mold opening completion signal input interface 7, a mold closing completion signal input interface 8, an ejector in place signal input interface 9, an ejector retracted signal input interface 10, a mold opening signal input interface 11, a reserved / middle plate mold input interface 12, a core entry stop signal input interface 13, a core exit stop signal input interface 14, an emergency stop input signal input interface 15, and a defective product signal input interface 26; wherein the safety door signal input interface 6 is provided with multiple, and the number of settings is consistent with the number of settings of the injection molding machine safety door. There are multiple core entry stop signal input interfaces 13 and core exit stop signal input interfaces 14, because there are multiple core entry stop detection sensors and multiple core exit stop detection sensors, which meets the requirements of multi-directional detection. There are also multiple emergency stop input signal input interfaces 15.

[0046] Several of the European standard injection molding machine output signal interfaces include a mold closing signal output interface 16, a mold closing signal output interface 17, a push-in signal output interface 18, a push-out signal output interface 19, a mold area safety signal output interface 20, a neutron movement-allowed robot entry signal output interface 21, a neutron movement-allowed robot entry signal output interface 21, a neutron movement-allowed robot to take injection molding product signal output interface 29, a reserved signal output interface 22, and a connection interface 23 connected to a 4-wire dial switch. Multiple neutron movement-allowed robot entry signal output interfaces 21 and neutron movement-allowed robot to take injection molding product signal output interfaces 29 are provided.

[0047] During the normal use of the European standard injection molding machine, we must first ensure that the mold area is safe. The mold area safety is determined in this way: when the main rise is safe and the auxiliary rise is safe, or the storage point is safe, power is supplied, and the following operations can be performed: mold closing, mold opening allowed, reserving recirculation, ejection allowed, ejection allowed, neutron movement allowed to allow the robot to enter, neutron movement allowed to take the injection molded products, etc.

[0048] Each of the European standard injection molding machine input signal interfaces is connected to the European standard injection molding machine signal via an optocoupler isolation module, which improves the anti-interference ability of signal transmission, thereby ensuring that the European standard expansion board can accurately receive the injection molding machine input signal, which facilitates the subsequent output of the injection molding machine control signal to control the injection molding machine system.

[0049] The following is an introduction to the optocoupler isolation module. Figure 4 As shown, the optical coupling isolation module includes a photoelectric coupler U1, resistors R1, R2, R3, R4 and R5, and capacitors C1 and C2;

[0050] In the default state of the circuit, the voltage difference between the optocoupler pin 1 and pin 2 cannot form a path, pins 3 and 4 (CE) are disconnected, VCC3v3 pulls up the signal, and the signal processor input signal EU_IN_10 is high. When ZB4 is a low-level signal and ZC9 is a high-level signal, the optocoupler pins 1 and 2 form a path, the light-emitting device inside the optocoupler emits light, and the internal light signal turns on pins 3 and 4 (CE), the resistor R2 connects one end of the optocoupler to the ground, and the signal processor input signal EU_IN_10 is input at a low level.

[0051] One end of the resistor R1, one end of the resistor R2 and one end of the capacitor C1 are all connected to pin 4 of the photocoupler U1, and the other end of the resistor R1 is connected to the vcc3.3v voltage; the other end of the resistor R2 is connected to the input signal pin of the signal processor, the other end of the capacitor C1 is grounded, and one end of the resistor R3, one end of the capacitor C2 and one end of the resistor R4 are all connected to pin 1 of the photocoupler U1, and the other end of the capacitor C2, the other end of the resistor R4 and one end of the resistor R5 are connected to pin 2 of the photocoupler U1;

[0052] The other end of the resistor R3 and the other end of the resistor R5 are both connected to the input signal interface of the European standard injection molding machine; the 3rd pin of the photoelectric coupler is grounded.

[0053] Each of the injection molding machine output signal interfaces is connected to the European standard injection molding machine signal via a relay isolation module.

[0054] Wherein, the relay isolation module includes a photoelectric coupler U2, a relay U3, a resistor R6 and a diode D1; Figure 5 As shown, one end of the resistor R6 is connected to pin 2 of the photocoupler U2, and the other end of the resistor R6 is connected to the European standard injection molding machine output signal interface on the European standard expansion board 3, pin 1 of the photocoupler U2 is connected to the vcc5V voltage, pin 3 of the photocoupler U2 is grounded, pin 4 of the photocoupler U2 is connected to the anode of the diode D1 and pin 1 of the relay, the cathode of the diode D1 and pin 2 of the relay U3 are connected to the 24V voltage, and pins 3 and 4 of the relay U3 are connected to the injection molding machine output signal.

[0055] When the output signal of the European standard injection molding machine on the M_OUT5 expansion board 3 is at a low level, pins 1 and 2 of the photocoupler U2 form a path, the light-emitting device inside the photocoupler emits light, and generates a light signal to turn on pins 3 and 4 (CE), and the coils of the relay pins 1 and 2 generate a 24V voltage, and the relay pins 3 and 4 are switched from normally open to normally closed.

[0056] The European expansion board 3 is provided with a CAN bus connection circuit, such as Figure 6As shown, the CAN bus connection circuit includes a CAN transceiver U4, capacitors C3 and C4, resistors R7 and R8, diodes D2 and D3, and a common mode inductor L. One end of the capacitor C3 is connected to the 3 pin of the CAN transceiver U4 and is also connected to VCC5V. The other end of the capacitor C3 is grounded. One end of the resistor R7 is connected to the RXD pin of the CAN transceiver U4. One end of the resistor R8 is grounded. The other end of the resistor R8 is connected to the other end of the resistor R7 and is also connected to the CAN_1RX pin on the signal processor. The TXD pin of the CAN transceiver U4 is connected to the CAN_1TX on the signal processor. One end of the capacitor C3 is connected to the 1 pin of the CAN transceiver U4 and the other end of the capacitor C3 is grounded.

[0057] The CANH pin and CANL pin of the CAN transceiver are connected via pins 1 and 3 of the common-mode inductor L, pins 2 and 4 of the common-mode inductor L are communicatively connected to the pulse / CANopen / EtherCAT / drive-control integrated mainboard 2, and the anode of the diode D3 and the anode of the diode D4 are grounded, and the cathode of the diode D3 is connected to the CANH pin of the CAN transceiver, and the cathode of the diode D4 is connected to the CANL pin of the CAN transceiver.

[0058] The CAN transceiver will realize the conversion between serial port signals and CAN signals. Pins 1 and 4 of the CAN transceiver chip are connected to the transmitting and receiving ends of the mainboard. The C4 capacitor is used to decouple the signal sent by the mainboard. The STB pin is grounded to select the normal working mode. The CAN differential signal output by pins 7 and 8 is filtered out of common-mode interference through a common-mode filter, and each is connected to a TVS diode for surge and electrostatic protection.

[0059] The European expansion board 3 has a reserved RE232 debugging interface 28 .

[0060] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A universal injection molding expansion board system, characterized in that: It includes a hand controller (1), a pulse / CANopen / EtherCAT / drive control integrated mainboard (2), a European standard expansion board (3) and an IO expansion board (4); The European standard expansion board (3) communicates and interacts with the pulse / CANopen / EtherCAT / drive-control integrated main board (2) via the CAN bus, and transmits IO information to the pulse / CANopen / EtherCAT / drive-control integrated main board (2); The hand controller (1) communicates and interacts with the pulse / CANopen / EtherCAT / drive-control integrated mainboard (2) via an RS422 interface; the hand controller (1) monitors the signal input of the European standard expansion board (3) in real time and controls the signal output of the European standard expansion board (3); The European standard expansion board (3) is connected to the external European standard injection molding machine signal; The IO expansion board (4) is connected to the European standard expansion board (3); the signal on the European standard expansion board (3) meets the European standard requirements.

2. A universal injection molding expansion board system according to claim 1, characterized in that: The European expansion board (3) includes a signal processor model GD32F103RBT6, The signal processor is provided with a CAN interface for connecting to a CAN bus, and the signal processor is also provided with a plurality of European standard injection molding machine input signal interfaces and a plurality of injection molding machine output signal interfaces; The plurality of European standard injection molding machine input signal interfaces include a safety door signal input interface (6), a mold opening completion signal input interface (7), a mold closing completion signal input interface (8), an ejector in position signal input interface (9), an ejector retracted position signal input interface (10), a mold opening signal input interface (11), a reserved / middle plate mold input interface (12), a core entry stop signal input interface (13), a core exit stop signal input interface (14), an emergency stop input signal input interface (15), and a defective product signal input interface (26); The plurality of output signal interfaces of the European standard injection molding machine include a mold closing signal output interface (16), a mold closing signal output interface (17), an ejection permission signal output interface (18), an ejection permission signal output interface (19), a mold area safety signal output interface (20), a neutron movement permission to allow a robot to enter signal output interface (21), a neutron movement permission to allow a robot to enter signal output interface (21), a neutron movement permission to take out a molded product signal output interface (29), a reserved signal output interface (22), and a connection interface (23) connected to a 4-wire DIP switch.

3. A universal injection molding expansion board system according to claim 2, characterized in that: Each of the European standard injection molding machine input signal interfaces is connected to the European standard injection molding machine signal via an optocoupler isolation module.

4. A universal injection molding expansion board system according to claim 3, characterized in that: The optical coupling isolation module includes a photoelectric coupler U1, resistors R1, R2, R3, R4 and R5, and capacitors C1 and C2; One end of the resistor R1, one end of the resistor R2 and one end of the capacitor C1 are all connected to pin 4 of the photocoupler U1, and the other end of the resistor R1 is connected to the vcc3.3v voltage; the other end of the resistor R2 is connected to the input signal pin of the signal processor, the other end of the capacitor C1 is grounded, and one end of the resistor R3, one end of the capacitor C2 and one end of the resistor R4 are all connected to pin 1 of the photocoupler U1, and the other end of the capacitor C2, the other end of the resistor R4 and one end of the resistor R5 are connected to pin 2 of the photocoupler U1; The other end of the resistor R3 and the other end of the resistor R5 are both connected to the input signal interface of the European standard injection molding machine; the 3rd pin of the photoelectric coupler is grounded.

5. A universal injection molding expansion board system according to claim 2, characterized in that: Each of the injection molding machine output signal interfaces is connected to the European standard injection molding machine signal via a relay isolation module.

6. A universal injection molding expansion board system according to claim 5, characterized in that: The relay isolation module includes a photocoupler U2, a relay U3, a resistor R6 and a diode D1; One end of the resistor R6 is connected to pin 2 of the photocoupler U2, and the other end of the resistor R6 is connected to the European standard injection molding machine output signal interface on the European standard expansion board (3). Pin 1 of the photocoupler U2 is connected to the vcc5V voltage, pin 3 of the photocoupler U2 is grounded, pin 4 of the photocoupler U2 is connected to the anode of the diode D1 and pin 1 of the relay, the cathode of the diode D1 and pin 2 of the relay U3 are connected to the 24V voltage, and pins 3 and 4 of the relay U3 are connected to the injection molding machine output signal.

7. A universal injection molding expansion board system according to claim 1, characterized in that: The European expansion board (3) is provided with a CAN bus connection circuit, which includes a CAN transceiver U4, capacitors C3 and C4, resistors R7 and R8, diodes D2 and D3, and a common mode inductor L. One end of the capacitor C3 is connected to the 3 pin of the CAN transceiver U4 and is also connected to VCC5V. The other end of the capacitor C3 is grounded. One end of the resistor R7 is connected to the RXD pin of the CAN transceiver U4. One end of the resistor R8 is grounded. The other end of the resistor R8 is connected to the other end of the resistor R7 and is also connected to the CAN_1RX pin on the signal processor. The TXD pin of the CAN transceiver U4 is connected to the CAN_1TX on the signal processor. One end of the capacitor C3 is connected to the 1 pin of the CAN transceiver U4 and the other end of the capacitor C3 is grounded. The CANH pin and the CANL pin of the CAN transceiver are connected via the 1st and 3rd pins of the common mode inductor L, the 2nd and 4th pins of the common mode inductor L are communicatively connected with the pulse / CANopen / EtherCAT / drive control integrated mainboard (2), and the anode of the diode D3 and the anode of the diode D4 are grounded, and the cathode of the diode D3 is connected to the CANH pin of the CAN transceiver, and the cathode of the diode D4 is connected to the CANL pin of the CAN transceiver.

8. A universal injection molding expansion board system according to claim 1, characterized in that: The European standard expansion board (3) is provided with a RE232 debugging interface (28).

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