JP2012047229A - Solenoid valve control unit and solenoid valve control panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solenoid valve control unit with which a circuit protector unit (CP) can be easily changed corresponding to the type of the solenoid valve to be controlled.SOLUTION: On one substrate, a solenoid valve control circuit, a connector for connecting I/O card, a power supply and a terminal block for connecting the solenoid valve are mounted. On the terminal block, a terminal 61C for common use connected with a common signal wire 74, a terminal 61D for driving signal connected with a driving signal wire 75, and a terminal 61F for driving signal connected with a driving signal 77 are provided. The terminal 61C for common use and the terminal 61D for driving signal are used common by a single solenoid type solenoid valve 81 and a double solenoid type solenoid valve. Also, a group of contact points 33A, 33B and 33C for mounting CP are arranged in the middle of each signal wires 74, 75 and 77. When the single solenoid type of solenoid valve 81 is connected, a bipolar type CP 31 is mounted, and when a double solenoid type solenoid valve is connected, a tripolar type CP is mounted.

Description

  The present invention relates to a solenoid valve control unit used for controlling a single solenoid type solenoid valve or a double solenoid type solenoid valve, and a solenoid valve control panel including such a solenoid valve control unit.

  2. Description of the Related Art Conventionally, there is known an electromagnetic valve control panel in which electrical parts and control parts necessary for controlling one or more electromagnetic valves are accommodated in one control panel. Japanese Patent Application Laid-Open No. 2003-140703 describes an example of an electromagnetic valve control device provided in such a control panel.

JP 2003-140703 A

  Generally used solenoid valves include a single solenoid type solenoid valve and a double solenoid type solenoid valve. The single solenoid type and the double solenoid type have different circuit configurations necessary for the control. For example, a solenoid valve control device disclosed in Japanese Patent Laid-Open No. 2003-140703 has a control circuit for a single solenoid type solenoid valve.

  Which type of solenoid valve is used depends on the required specifications of the device and system equipped with the solenoid valve, and the specifications of the control panel are determined according to the type of solenoid valve. A device or system using a single solenoid type solenoid valve requires a control panel having a control circuit for a single solenoid type, and a device or system using a double solenoid type solenoid valve requires a control circuit for a double solenoid type. A control panel is required. If both types of solenoid valves are used, a control panel having each type of control circuit is required. In that case, it is possible to provide a control circuit for a single solenoid type and a control circuit for a double solenoid type in one control panel. However, simply disposing a dedicated control circuit for each type of solenoid valve increases the number of parts and complicates wiring work.

  Therefore, the inventor of the present application unitizes a circuit and a terminal necessary for controlling the solenoid valve for each one or a plurality of solenoid valves, and one solenoid valve control unit is both a single solenoid type and a double solenoid type. We examined the configuration to be compatible with the above. An issue that was raised during the study was the installation of a circuit protector to protect the solenoid valve from overcurrent. A two-pole type circuit protector corresponds to the single solenoid type electromagnetic valve, and a three-pole type circuit protector corresponds to the double solenoid type solenoid valve. It is possible to fix each type of circuit protector. However, in that case, the solenoid valve control unit cannot be configured compactly. In order to realize a compact solenoid valve control unit, it is necessary that the circuit protector be easily replaceable in accordance with the type of solenoid valve used.

  The present invention has been made in view of the above-described problems, and can be used to control a single solenoid type solenoid valve or a double solenoid type solenoid valve. It is an object of the present invention to provide a solenoid valve control unit in which a circuit protector can be easily replaced in accordance with the above. It is another object of the present invention to provide an electromagnetic valve control panel that includes such an electromagnetic valve control unit and is easy to assemble.

  The solenoid valve control unit of the present invention comprises a solenoid valve control circuit, a connector for connecting an I / O card, a terminal block for connecting a power source and a solenoid valve, and a contact group for attaching a circuit protector, which are one substrate. It has the structure provided above. The solenoid valve control circuit includes a first drive circuit and a second drive circuit. They are used alone to drive a single solenoid type solenoid valve, and combined to be used to drive a double solenoid type solenoid valve. The connector includes a first input terminal to which an input signal line to the first drive circuit is connected, and a second input terminal to which an input signal line to the second drive circuit is connected. The terminal block includes a common terminal to which a common signal line is connected, a first drive signal terminal to which a drive signal line of a first drive circuit (hereinafter referred to as a first drive signal line) is connected, and a first A second drive signal terminal to which a drive signal line of the second drive circuit (hereinafter referred to as a second drive signal line) is connected is provided. Each terminal uses the common terminal and the first drive signal terminal when the single solenoid type solenoid valve is connected, and in addition to the common terminal and the first drive signal terminal when the double solenoid type solenoid valve is connected. Two drive signal terminals are allocated to be used. The contact group to which the circuit protector is attached includes two pairs of contacts that are arranged in the middle of the common signal line and the first drive signal line and are used for attachment of the two-pole circuit protector, and the second drive signal. And a pair of contacts that are arranged in the middle of the wire and used to attach a three-pole circuit protector together with the two pairs of contacts.

  In the solenoid valve control unit, it is preferable that the common signal line, the first drive signal line, and the second drive signal line are each configured by a pattern wiring formed on the substrate. Similarly, it is preferable that the signal line for connecting the connector for connecting the I / O card and the solenoid valve control circuit is also configured by pattern wiring.

  In the solenoid valve control unit, the second common terminal and the third drive signal terminal directly connected to the first drive circuit, and the fourth drive signal direct connection to the second drive circuit A terminal can be further provided on the terminal block. The second common terminal and the third drive signal terminal can be used for connection of a single solenoid type solenoid valve. The fourth drive signal terminal can be used together with the second common terminal and the third drive signal terminal to connect a double solenoid type solenoid valve. In this case, the first and second drive circuits are preferably provided with an overcurrent control circuit that turns off the output of the drive signal when an overcurrent is detected.

  The electromagnetic valve control panel according to the present invention includes a power supply component panel to which power supply components including a power supply terminal block and a power supply device are attached, and the electromagnetic valve control unit and the I / O card are attached via a DIN rail. Control part panel. The power supply panel and the control component panel are connected by a power cable that supplies electricity from the power supply panel to the control component panel, and are attached to the mounting plate in that state. The mounting plate forms a housing together with a cover that covers the front surface of the mounting plate.

  Another solenoid valve control panel of the present invention includes a product mounting panel. On the product mounting panel, the solenoid valve control unit and the I / O card are mounted via a DIN rail, and power supply components including a power supply terminal block and a power supply device are also mounted. Is wired. The product mounting panel is mounted inside the storage box.

  According to the solenoid valve control unit of the present invention, when a single solenoid type solenoid valve is used, the single solenoid type solenoid valve is connected to the common terminal of the terminal block and the first drive signal terminal, and the common signal line In addition, a two-pole circuit protector may be attached to two pairs of contacts arranged in the middle of each of the first drive signal lines. The single solenoid type solenoid valve connected to the terminal block inputs an operation signal from the I / O card to the first input terminal of the connector, and causes the first drive circuit of the solenoid valve control circuit to output the drive signal, Its operation can be controlled. When an overcurrent flows for some reason, the two-pole circuit protector is turned off, so that the single solenoid type solenoid valve can be protected from the overcurrent.

  When a double solenoid type solenoid valve is used, a double solenoid type solenoid valve is connected to the common terminal of the terminal block, the first drive signal terminal, and the second drive signal terminal, and the two pairs of contacts A three-pole circuit protector may be attached to a pair of contacts arranged in the middle of the second drive signal line. The contact group to which the circuit protector is attached is on the same substrate as the terminal block, and its attachment and detachment can be freely performed. Therefore, it is easy to replace the two-pole circuit protector with the three-pole circuit protector. The double solenoid type solenoid valve connected to the terminal block inputs an operation signal from the I / O card to the first input terminal and the second input terminal of the connector, and the first drive circuit of the solenoid valve control circuit The operation can be controlled by causing each of the second drive circuits to output a drive signal. When an overcurrent flows for some reason, the three-pole circuit protector is turned off, so that the double solenoid type solenoid valve can be protected from the overcurrent.

  As described above, the solenoid valve control unit of the present invention can be used for controlling both a single solenoid type solenoid valve and a double solenoid type solenoid valve, and is adapted to the type of solenoid valve to be controlled. The circuit protector can be easily replaced.

  Moreover, according to each solenoid valve control panel of this invention, since each article | item including the said solenoid valve control unit can be previously attached to a panel and can be attached in a panel, the assembly is easy. Further, since the solenoid valve control unit is attached via a DIN rail, it can be easily replaced in units as needed.

It is a top view of the solenoid valve control unit of an embodiment of the invention. It is a top view in the state where the 2 pole type circuit protector of the solenoid valve control unit of an embodiment of the invention was attached. It is a top view in the state where the 3 pole type circuit protector of the solenoid valve control unit of an embodiment of the invention was attached. It is a circuit diagram in the state where a single solenoid type solenoid valve and a two-pole type circuit protector of the solenoid valve control unit of the embodiment of the present invention are attached. It is a circuit diagram in the state where the double solenoid type solenoid valve and three pole type circuit protector of the solenoid valve control unit of an embodiment of the invention were attached. It is a perspective view of the solenoid valve control panel of the embodiment of the present invention. It is a figure which shows the manufacturing method of the solenoid valve control panel of embodiment of this invention. It is a perspective view of the solenoid valve control panel of another embodiment of this invention. It is a perspective view of the solenoid valve control panel of another embodiment of this invention. It is a perspective view of the solenoid valve control panel of another embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Configuration of solenoid valve control unit)
FIG. 1 is a plan view of a solenoid valve control unit according to an embodiment of the present invention. As shown in the plan view, the electromagnetic valve control unit 3 is configured by integrally attaching a connector 70, a terminal block 60 and an electromagnetic valve control circuit 30 on a substrate 90. The connector 70 is a connector for connection with an I / O card, and includes a plurality of input terminals 71 to which signals from the I / O card are input. The terminal block 60 is a terminal block for connecting a power source and an electromagnetic valve, and includes a plurality of terminals 61 including a terminal for connecting a power source and a terminal for connecting an electromagnetic valve. The solenoid valve control circuit 30 is a control circuit for controlling the solenoid valve connected to the terminal block 60 according to an input signal from the I / O card. A signal line connecting the electromagnetic valve control circuit 30 and the connector 70 and a signal line connecting the electromagnetic valve control circuit 30 and the terminal block 60 are configured by a pattern wiring 34 formed on the substrate 90.

  In the electromagnetic valve control unit 3, tab contacts (contact points) 33 are arranged in the middle of some signal lines connecting the terminal block 60 and the electromagnetic valve control circuit 30. The tab contact 33 is provided for mounting a plug-in type circuit protector. This is because a circuit protector is required for protection from overcurrent depending on the specifications of the solenoid valve. Of the plurality of terminals provided on the terminal block 60, the terminal to which the signal line on which the tab contact 33 is disposed is connected is a terminal for an electromagnetic valve that requires a circuit protector, and the tab contact 33 is not disposed. The terminal to which the signal line is connected is a terminal for a solenoid valve that does not require a circuit protector. The tab contact 33 is provided by pairing a tab contact on the terminal block 60 side and a tab contact on the solenoid valve control circuit 30 side. The solenoid valve control unit 3 includes tab contact sets (contact groups) 66A and 66C having three pairs of tab contacts 33 and tab contact sets 66B and 66D having two pairs of tab contacts 33.

  As will be described in detail later, the solenoid valve control circuit 30 provided in the solenoid valve control unit 3 is configured as a control circuit that can be used for both the control of the single solenoid type solenoid valve and the control of the double solenoid type solenoid valve. . If the solenoid valve requires a circuit protector, the type of circuit protector will be different depending on the type of solenoid valve. In the case of a single solenoid type solenoid valve, a two-pole type circuit protector is required. On the other hand, in the case of a double solenoid type solenoid valve, a three-pole type circuit protector is required. Two pairs of tab contacts 33 are required for mounting the two-pole circuit protector, and three pairs of tab contacts 33 are required for mounting the three-pole circuit protector. Of the four tab contact sets described above, 66B and 66D are dedicated to mounting a 2-pole circuit protector, and 66A and 66C are commonly used for mounting a 2-pole and 3-pole circuit protector. Yes.

  FIG. 2 is a plan view showing a state in which the two-pole circuit protector 31 is attached to the electromagnetic valve control unit 3. FIG. 3 is a plan view showing a state in which the three-pole circuit protector 32 is attached to the electromagnetic valve control unit 3. As shown in these drawings, two pairs of tab contacts 33 are required for mounting the two-pole circuit protector 31, and three pairs of tab contacts 33 are required for mounting the three-pole circuit protector 32. . The four tab contact sets 66A, 66B, 66C, 66D shown in FIG. 1 are all used for mounting the bipolar circuit protector 31. Further, the tab contact sets 66 </ b> A and 66 </ b> C are also used for attaching the three-pole circuit protector 32.

  Next, the circuit configuration of the electromagnetic valve control circuit 30 employed in the present embodiment will be described in detail using the circuit diagrams of FIGS. 4 and 5. Each of the circuit diagrams of FIGS. 4 and 5 shows a part of the circuit of the solenoid valve control circuit 30 extracted. Specifically, only the circuits related to the tab contact sets 66A and 66B in the plan view of FIG. 1 are extracted and shown, and the circuits related to the tab contact sets 66C and 66D are omitted. 4 and 5, tab contacts 33A, 33B and 33C are tab contacts corresponding to the tab contact set 66A in FIG. 1, and tab contacts 33D and 33E are tab contacts corresponding to the tab contact set 66B in FIG. . In addition, the alphabet of AE is a code | symbol for distinguishing each tab contact 33 from others. The same applies to the terminal 61 of the terminal block 60 and the terminal 71 of the connector 70. FIGS. 4 and 5 show only the terminals related to the circuit. In FIGS. 4 and 5, the letters AM are added to the reference numerals to distinguish the individual terminals 61 from the others, and the letters A and B are attached to the signs to distinguish the individual terminals 71 from the others. ing.

  Of the terminals 61 of the terminal block 60, the terminals 61 </ b> A and 61 </ b> B are terminals for connecting the DC power supply 8. The positive side of the DC power supply 8 is connected to the terminal 61A, and the negative side is connected to the terminal 61B. A power line (plus line) 73 extends from the terminal 61 </ b> A to the inside of the electromagnetic valve control circuit 30. A common signal line (minus line) 74 extends from the terminal 61B.

  Terminals 61C-61M are terminals for connecting solenoid valves, and include a first terminal set including a common terminal 61C and two drive signal terminals 61D and 61E, a common terminal 61F, and two drive signal terminals. A second terminal set composed of 61G and 61H, a third terminal set composed of a common terminal 61J and a drive signal terminal 61K, and a fourth terminal set composed of a common terminal 61L and a drive signal terminal 61M. Divided. A common signal line 74 is connected to each common terminal 61C, 61F, 61J, 61L. A common drive signal line 75 is connected to the drive signal terminals 61D and 61G, a common drive signal line 77 is connected to the drive signal terminals 61E and 61H, and a common drive is connected to the drive signal terminals 61K and 61M. A signal line 76 is connected.

  The first terminal set can be used for both the single solenoid type solenoid valve 81 and the double solenoid type solenoid valve 83. Similarly, the second terminal set can be used for both the single solenoid type solenoid valve 82 and the double solenoid type solenoid valve 84. However, in the first terminal set, tab contacts 33A, 33B, and 33C for attaching the circuit protectors 31 and 32 are arranged on signal lines connected to the terminals 61C, 61D, and 61E. On the other hand, in the second terminal set, signal lines are directly connected to the terminals 61F, 61G, and 61H. That is, the first terminal set is a terminal set used when a circuit protector is required, and the second terminal set is a terminal set used when a circuit protector is not required.

  As will be apparent from the following description, the terminal 61C in the first terminal set corresponds to the “common terminal” in the solenoid valve control unit of the present invention, and the terminal 61D corresponds to the “first drive signal terminal”. The terminal 61E corresponds to the “second drive signal terminal”. On the other hand, the terminal 61F in the second terminal set corresponds to the “second common terminal” in the solenoid valve control unit of the present invention, the terminal 61G corresponds to the “third drive signal terminal”, and the terminal 61H. Corresponds to the “fourth drive signal terminal”.

  The third terminal set and the fourth terminal set can be used only for the single solenoid type solenoid valves 81 and 82. However, in the third terminal set, tab contacts 33D and 33E for attaching the circuit protector 31 are arranged on signal lines connected to the terminals 61J and 61K. On the other hand, in the fourth terminal set, signal lines are directly connected to the terminals 61L and 61M. That is, the third terminal set is a terminal set used when a circuit protector is required, and the fourth terminal set is a terminal set used when a circuit protector is not required.

  The solenoid valve control circuit 30 includes two drive circuits, that is, a first drive circuit 50A and a second drive circuit 50B. The first drive circuit 50A includes a receiver 35, an overcurrent control circuit 36, a solenoid valve control output transistor 37, a solenoid valve drive FET 38, a current detection resistor 39, an overcurrent detection amplifier 40, an overcurrent detection reference voltage 41, An overcurrent detection circuit effective switch 42 and a pull-up resistor 43 are included.

  In the first drive circuit 50 </ b> A, the receiver 35 serves as a receiver that receives a signal input from the input terminal 71 </ b> A of the connector 70. The receiver 35 is connected to the input terminal of the overcurrent control circuit 36. The overcurrent control circuit 36 is a NAND circuit, and a pull-up resistor 43 and an overcurrent detection amplifier 40 described later are connected in parallel to the other input terminal. The output terminal of the overcurrent control circuit 36 is connected to the base of the solenoid valve control output transistor 37.

  The solenoid valve control output transistor 37 is a grounded NPN transistor. The connector is connected to the gate of the solenoid valve drive FET 38. The solenoid valve driving FET 38 is an N-channel MOSFET, and its drain is connected to the power supply line 73 via the current detection resistor 39. On the other hand, the source of the solenoid valve drive FET 38 is connected to the drive signal line 75. With this configuration, in the first drive circuit 50A, the on / off of the drive signal output to the drive signal line 75 is switched by the on / off of the input signal to the gate of the solenoid valve drive FET 38. It has become. Specifically, when the input signal to the gate is off, the drive signal output from the solenoid valve drive FET 38 to the drive signal line 75 is turned on due to the current flowing between the drain and source.

  The overcurrent detection amplifier 40 constitutes an overcurrent detection circuit together with a current detection resistor 39, an overcurrent detection reference voltage 41, and an overcurrent detection circuit valid switch 42. The overcurrent detection amplifier 40 is a comparator, and the voltage of the current detection resistor 39 and the voltage of the overcurrent detection reference voltage 41 are input to its input terminals. The comparison result of both voltages is output from the output terminal of the overcurrent detection amplifier 40. If the voltage of the current detection resistor 39 is lower than the reference voltage, the output signal of the overcurrent detection amplifier 40 is turned on. If the voltage of the current detection resistor 39 is higher than the reference voltage, the output signal of the overcurrent detection amplifier 40 is turned on. Is turned off. The output terminal of the overcurrent detection amplifier 40 is connected to the input terminal of the overcurrent control circuit 36 via the overcurrent detection circuit valid switch 42.

  The second drive circuit 50 </ b> B is configured to receive a signal input from the input terminal 71 </ b> B of the connector 70 and output a drive signal to the drive signal line 76. As can be seen from the circuit diagram, the configuration of the two drive circuits 50A and 50B is the same, and therefore the detailed description of the configuration of the second drive circuit 50B is omitted. The difference between the two drive circuits 50A and 50B is that a circuit protector 2-pole / 3-pole selector switch 45 is attached to the second drive circuit 50B. The circuit protector 2-pole / 3-pole switch 45 is a switch for connecting the drive signal line 77 to the drive signal line 76. FIG. 4 shows a state in which the switch 45 is off, and FIG. 5 shows a state in which the switch 45 is on.

(Operation of solenoid valve control unit)
Next, the operation of the electromagnetic valve control unit 3 will be described together with its usage. First, the case where the solenoid valve control unit 3 is used to control a single solenoid type solenoid valve will be described with reference to FIG. In this case, the first thing to be performed is the selection of whether or not to use the solenoid valve protection circuit by the circuit protector. If the solenoid valve 81 needs to be protected from overcurrent, the solenoid valve 81 is connected to the terminals 61C and 61D or the terminals 61J and 61K. At this time, when the terminals 61C and 61D are used, the bipolar circuit protector 31 is attached to the tab contacts 33A and 33B. When the terminals 61J and 61K are used, the bipolar circuit protector 31 is attached to the tab contacts 33D and 33E. On the other hand, if the solenoid valve 82 does not require protection from overcurrent, the solenoid valve 82 is connected to the terminals 61F and 61G or the terminals 61L and 61M. When the solenoid valve control unit 3 is used to control a single solenoid type solenoid valve, the circuit protector 2 pole / 3 pole switch 45 is turned off.

  Here, it is assumed that the solenoid valve 81 is connected to the terminals 61C and 61D and the terminals 61J and 61K, respectively. In this case, the operation of the solenoid valve 81 connected to the terminals 61C and 61D is controlled by the first drive circuit 50A based on a signal input from the I / O card to the input terminal 71A. On the other hand, the operation of the solenoid valve 81 connected to the terminals 61J and 61K is controlled by the second drive circuit 50B based on a signal input from the I / O card to the input terminal 71B.

  More specifically, when the input signal to the input terminal 71A is off, the output signal of the overcurrent control circuit 36, which is a NAND circuit, is on. In this case, since the output signal of the solenoid valve control output transistor 37 is on, the drive signal output from the solenoid valve drive FET 38 is off. On the other hand, when the input signal to the input terminal 71A is turned on, the output signal of the overcurrent control circuit 36 is turned off, so that the output signal of the solenoid valve control output transistor 37 is also turned off. As a result, the drive signal output from the solenoid valve drive FET 38 is turned on, and the solenoid of the solenoid valve 81 is driven by the drive signal.

  When an overcurrent flows through the solenoid valve 81, either the overcurrent control circuit 36 or the two-pole circuit protector 31 functions. When the former functions first, the output signal of the overcurrent control circuit 36 is turned on when the output signal of the overcurrent detection amplifier 40 is turned off. As a result, the output signal of the solenoid valve control output transistor 37 is also turned on, and the drive signal output from the solenoid valve drive FET 38 is turned off. When the latter functions first, the signal line connecting the terminals 61C and 61D and the solenoid valve control circuit 30 is cut off by turning off the bipolar circuit protector 31.

  Next, the case where the electromagnetic valve control unit 3 is used for control of a double solenoid type electromagnetic valve will be described with reference to FIG. In this case as well, the selection of whether or not to use the solenoid valve protection circuit by the circuit protector is first performed. If the solenoid valve 83 needs to be protected from overcurrent, the solenoid valve 83 is connected to the terminals 61C, 61D, and 61E, and the three-pole circuit protector 32 is attached to the tab contacts 33A, 33B, and 33C. If the solenoid valve 84 does not require protection from overcurrent, the solenoid valve 82 is connected to the terminals 61F, 61G, 61H. Then, the circuit protector 2-pole / 3-pole switch 45 is switched from OFF to ON. When the solenoid valve control unit 3 is used for controlling a double solenoid type solenoid valve, the terminals 61J and 61K and the terminals 61L and 61M, which are dedicated terminals for the single solenoid type solenoid valve, are not used.

  Here, it is assumed that the solenoid valve 83 is connected to the terminals 61C, 61D, 61E. The electromagnetic valve 83 which is a double solenoid type electromagnetic valve has two solenoids to be driven. The operation of one of the solenoids is controlled by the first drive circuit 50A based on a signal input from the I / O card to the input terminal 71A. The operation of the other solenoid is controlled by the second drive circuit 50B based on a signal input from the I / O card to the input terminal 71B.

  More specifically, by turning on the input signal to the input terminal 71A, the drive signal output from the first drive circuit 50A to the drive signal line 75 is turned on, and the solenoid connected to the drive signal terminal 61D. Is driven. On the other hand, when the input signal to the input terminal 71B is turned on, the drive signal output from the second drive circuit 50B to the drive signal line 76 is turned on. Since the drive signal line 76 is connected to the drive signal line 77 by the circuit protector 2-pole / 3-pole selector switch 45, the drive signal is input from the drive signal line 77 to the drive signal terminal 61E, and is input to the drive signal terminal 61E. The connected solenoid is driven.

  When an overcurrent flows through the electromagnetic valve 83, either the overcurrent control circuit 36 or the three-pole circuit protector 32 in each drive circuit 50A, 50B functions. When the former functions first, the output signal of the overcurrent control circuit 36 is turned on when the output signal of the overcurrent detection amplifier 40 in each drive circuit 50A, 50B is turned off. As a result, the output signal of the solenoid valve control output transistor 37 is also turned on, and the drive signal output from the solenoid valve drive FET 38 is turned off. When the latter functions first, the signal line connecting the terminals 61C, 61D, 61E and the solenoid valve control circuit 30 is cut off by turning off the three-pole circuit protector 32.

(Advantages of solenoid valve control unit)
As described above, the solenoid valve control unit 3 according to the present embodiment can be used both for controlling a single solenoid type solenoid valve and for controlling a double solenoid type solenoid valve. In addition, since all the circuits and terminals necessary for controlling the electromagnetic valve are attached to the surface of the substrate, the workability of exchanging parts and connecting cords is excellent. This also applies to the attachment / detachment of circuit protectors, depending on the type of solenoid valve to be controlled, from a 2-pole circuit protector to a 3-pole circuit protector, or from a 3-pole circuit protector to a 2-pole circuit protector. Can be easily replaced.

  The solenoid valve control unit 3 has two means, a built-in overcurrent control circuit and an external circuit protector, as means for protecting the solenoid valve from overcurrent. In particular, according to an external circuit protector, one having a cutoff current corresponding to the specifications of the solenoid valve can be selected as appropriate. Therefore, according to the solenoid valve control unit 3, the solenoid valve can be reliably protected from overcurrent by connecting the solenoid valve to a terminal with a circuit protector.

(Configuration of solenoid valve control panel)
The solenoid valve control unit 3 described above is used by being housed in a solenoid valve control panel. FIG. 6 is a perspective view of the solenoid valve control panel according to the embodiment of the present invention. As shown in this figure, a power panel 16 and an I / O card mounting panel 17 are accommodated in the electromagnetic valve control panel 1. The power supply panel 16 is a panel (power supply component panel) to which a plurality of power supply components such as the power supply device 2, the electrical component 5, and the power supply terminal block 6 are attached. The I / O card mounting panel 17 is a panel (control component panel) on which a plurality of control components such as the I / O card 14 and the electromagnetic valve control unit 3 are mounted. Both the I / O card 14 and the solenoid valve control unit 3 are attached to the I / O card attachment panel 17 via the DIN rail 13. A cable support 15 is also attached to the I / O card mounting panel 17. The cable support 15 supports a power cable 46 that supplies electricity from the power panel 16 to the I / O card mounting panel 17. The power supply panel 16 and the I / O card attachment panel 17 are attached to the attachment plate 11 corresponding to the back plate of the solenoid valve control panel 1. The mounting plate 11, together with the upper cover 21, the lower cover 22, and the front door 25, forms a housing that houses the power supply panel 16 and the I / O card mounting panel 17.

(Manufacturing method of solenoid valve control panel)
FIG. 7 is a diagram showing a method for manufacturing the electromagnetic valve control panel 1. When the electromagnetic valve control panel 1 is manufactured, the power supply panel 16 and the I / O card mounting panel 17 to which each component is already attached are prepared in advance. In the process of attaching each power supply component to the power supply panel 16, wiring between the power supply components is also performed simultaneously. In the process of attaching each control component to the I / O card attachment panel 17, wiring between the control components is also performed simultaneously.

  At the production site of the solenoid valve control panel 1, the mounting plate 11 is placed in a horizontal position. The power supply panel 16 and the I / O card attachment panel 17 are attached to the attachment plate 11 in this state. Then, after the attachment of the panels 16 and 17 is completed, the power cable 46 is wired between the panels 16 and 17. After the installation of the panels 16 and 17 and the wiring of the power cable 46 are completed, the mounting plate 11 is raised and the upper and lower covers and the front door are retrofitted to the mounting plate 11. Thereby, manufacture of the solenoid valve control panel 1 is completed.

(Other)
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, the electromagnetic valve control panel in which the electromagnetic valve control unit 3 is accommodated may be modified as in the following examples.

  The electromagnetic valve control panel 101 shown in FIG. 8 includes a front cover 12 on the front surface of the mounting plate 11 and a rear cover 26 on the rear surface. Inside each cover 12, 26, the power supply panel 16 and the I / O card mounting panel 17 are accommodated with the power supply cable 46 wired. FIG. 8 shows a state in which the panels 16 and 17 are attached to the surface of the mounting plate 11, but the panels 16 and 17 are also attached to the back surface of the mounting plate 11.

  The electromagnetic valve control panel 102 shown in FIG. 9 includes a storage box 19 and a product mounting panel 18 mounted therein. The power supply terminal block 6, the I / O card 14 and the electromagnetic valve control unit 3 are attached to the product mounting panel 18, and a power cable 46 is wired between these products. The I / O card 14 and the solenoid valve control unit 3 are attached to the product attachment panel 18 via the DIN rail 13. A cable support 15 for supporting the power cable 46 is also attached to the article mounting panel 18.

  The electromagnetic valve control panel 103 shown in FIG. 10 includes the above-described product mounting panel 18 inside the stand type storage box 20. The article attachment panel 18 is attached to the back plate of the stand type storage box 20. An operation tool 48 is attached to the stand type storage box 20.

1, 101, 102, 103 Solenoid valve control panel 2 Power supply device 3 Solenoid valve control unit 5 Electrical component 6 Power supply terminal block 8 Power supply device 11 Mounting plate 12 Surface cover 13 DIN rail 14 I / O card 15 Cable support 16 Power supply Panel 17 I / O card mounting panel 18 Product mounting panel 19 Storage box 20 Stand type storage box 21 Upper cover 22 Lower cover 25 Front door 26 Back cover 30 Solenoid valve control circuit 31 Bipolar circuit protector (plug-in circuit protector)
32 3-pole circuit protector (plug-in circuit protector)
33, 33A-33E Tab contact 34 Pattern wiring 35 Receiver 36 Overcurrent control circuit 37 Solenoid valve control output transistor 38 Solenoid valve drive FET
39 Current detection resistor 40 Overcurrent detection amplifier 41 Overcurrent detection reference voltage 42 Overcurrent detection circuit valid switch 43 Pull-up resistor 45 Circuit protector 2-pole / 3-pole switch 46 Power cable 48 Operating instrument 50A, 50B Drive circuit 60 Terminal block 61, 61A-61M Terminal 70 Connector 71A, 71B Terminal 73 Power line 74 Common signal line 75, 76, 77 Drive signal line 81 Single solenoid type solenoid valve (using circuit protector)
82 Single solenoid type solenoid valve (without circuit protector)
83 Double solenoid type solenoid valve (with circuit protector)
84 Double solenoid type solenoid valve (without circuit protector)
90 substrates

Claims (5)

Solenoid valve control circuit comprising first and second drive circuits that are used alone to drive a single solenoid type solenoid valve, and used in combination to drive a double solenoid type solenoid valve;
A connector for connecting an I / O card, wherein a first input terminal to which an input signal line to the first drive circuit is connected, and a first input terminal to which the input signal line to the second drive circuit is connected A connector having two input terminals;
A terminal block for connecting a power source and a solenoid valve, wherein a common terminal to which a common signal line is connected and a drive signal line (hereinafter referred to as a first drive signal line) of the first drive circuit are connected 1 drive signal terminal, and a second drive signal terminal to which a drive signal line of the second drive circuit (hereinafter referred to as a second drive signal line) is connected. When connecting, the common terminal and the first drive signal terminal are used, and when connecting the double solenoid type solenoid valve, the second drive signal terminal in addition to the common terminal and the first drive signal terminal. A terminal block to which each terminal is assigned so that
A contact group for attaching a circuit protector, which is disposed in the middle of each of the common signal line and the first drive signal line and used for attaching a two-pole circuit protector, and the second drive A contact group including a pair of contacts disposed in the middle of the signal line and used together with the two pairs of contacts to attach a three-pole circuit protector;
An electromagnetic valve control unit, wherein the electromagnetic valve control circuit, the connector, the terminal block, and the contact group are provided on one substrate.   2. The electromagnetic valve control unit according to claim 1, wherein the common signal line, the first drive signal line, and the second drive signal line are each configured by a pattern wiring formed on the substrate. . The terminal block includes a second common terminal and a third drive signal terminal directly connected to the first drive circuit, and a fourth drive signal terminal linearly connected to the second drive circuit. A connection to the single solenoid type solenoid valve using the second common terminal and the third drive signal terminal; a second common terminal; a third drive signal terminal; The drive signal terminal is used to connect to the double solenoid type solenoid valve.
3. The solenoid valve control according to claim 1, wherein the first and second drive circuits are provided with an overcurrent control circuit that turns off output of a drive signal when an overcurrent is detected. unit. A power supply component panel to which power supply components including a power supply terminal block and a power supply device are attached;
A control component panel to which the solenoid valve control unit according to any one of claims 1 to 3 and an I / O card are attached via a DIN rail;
A power cable for connecting the power component panel and the control component panel and supplying electricity from the power panel to the control component panel;
A mounting plate on which the power supply component panel and the control component panel are mounted;
A cover that forms a housing with the mounting plate;
An electromagnetic valve control panel comprising: The solenoid valve control unit according to any one of claims 1 to 3 and the I / O card are attached via a DIN rail, and a power supply component including a power supply terminal block and a power supply device is attached together. In addition, the product mounting panel where the power cable is routed,
A storage box in which the product mounting panel is mounted;
An electromagnetic valve control panel comprising:

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