PLC / DCS digital quantity output relay module

Abstract

The utility model discloses a PLC / DCS digital quantity output relay module in the technical field of electrical equipment. Comprising an epoxy resin bottom plate, a terminal identifier fixed on the surface of the epoxy resin bottom plate, two power supply terminals used for connecting a load power supply, a first fuse, a second fuse, a third fuse, a first control output terminal, a second control output terminal, a third control output terminal, an isolation relay, two controller power supply input terminals and a plug, the number of the terminal identifiers corresponds to the number of two power supply terminals, the number of the first control output terminal, the number of the second control output terminal, the number of the third control output terminal and the number of two controller power supply input terminals which are used for connecting a load power supply, and the terminal identifiers are a VCC end, a COM end, a 1NC end, a 1COM end, a 1NO end and two V-ends which are in one-to-one correspondence respectively; according to the utility model, the use safety of the load power supply and the controller can be effectively protected, the use is flexible, the output configuration control is convenient, and the cost of the controller required to be increased for completing different control tasks is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a PLC / DCS digital quantity output relay module. Background Art

[0002] At present, the digital output of PLC / DCS in industrial control is generally controlled directly by controller cards or controlled by relays. Due to various unexpected and uncontrollable factors in the actual construction, debugging and operation process, individual models are inevitably prone to grounding or signal source interference and other faults, and direct control of PLC / DCS is easy to be damaged, thus affecting the operation of the controller and posing a safety hazard. The use of general relay isolation requires a large amount of wiring work during installation, is prone to errors, and occupies a large amount of space. The controller is the core of the control system. If the control system loses control, the consequences will be serious. At the least, the equipment will not operate normally, and at the worst, it will cause control failure, resulting in significant economic losses, or even a production safety accident. Based on this, the utility model designs a PLC / DCS digital output relay module to solve the above problems. Utility Model Content

[0003] The purpose of the utility model is to provide a PLC / DCS digital output relay module to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a PLC / DCS digital output relay module, comprising an epoxy resin base plate and a terminal identifier fixed on its surface, two power terminals for connecting a load power supply, a first fuse, a second fuse, a third fuse, a first control output terminal, a second control output terminal, a third control output terminal, an isolation relay, two controller power input terminals and a plug, wherein the load power supply voltage is DC24V, the terminal identifier corresponds to the number of the two power terminals for connecting the load power supply, the first control output terminal, the second control output terminal, the third control output terminal and the two controller power input terminals, and the terminal identifiers are one-to-one corresponding to the VCC terminal, the COM terminal, the 1N terminal and the 2N terminal. C terminal, 1COM terminal, 1NO terminal and two V-terminals, the VCC terminal and COM terminal of the power terminal are respectively connected to the second wire and the first wire, a first fuse and a power indicator light are connected in series between the second wire and the first wire, the third fuse is converted and connected between the first wire and the 1COM terminal, the second fuse is converted and connected between the COM terminal of the isolation relay and the second wire or the 1COM terminal, the NC and NO terminals of the isolation relay are respectively connected to the 1NC terminal and the 1NO terminal, the positive terminal of the coil of the isolation relay is connected to the plug through the third wire, a status indicator light is connected in series between the positive terminal and the negative terminal of the coil of the isolation relay, and the negative terminal of the coil of the isolation relay is also connected to the plug and two V-terminals through a negative common line.

[0005] Preferably, a first voltage-limiting resistor is connected in series between the first fuse and the power indicator light, and a second voltage-limiting resistor is connected in series between the positive end and the negative end of the coil of the isolation relay.

[0006] Preferably, the power indicator light, the first voltage-limiting resistor, the first fuse, the status indicator light and the second voltage-limiting resistor are detachably connected to the epoxy resin base plate via a connector.

[0007] Preferably, the NC and NO terminals of the isolation relay are connected to the 1NC terminal and the 1NO terminal respectively through thin enameled wires.

[0008] Preferably, the plug is a nine-pin plug, which includes nine interfaces, namely 0.1 interface, 0.2 interface, 0.3 interface, 0.4 interface, 0.5 interface, 0.6 interface, 0.7 interface, 0.8 interface and V-interface.

[0009] Preferably, the 0.1 interface is connected to the third wire and the positive electrode of the output power supply voltage of the control system card, and the V-interface is connected to two V-terminals.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model aims at the influence of digital output signals that are prone to failure on the control system, and the core is to solve the influence of fault signals on the digital output cards and wiring errors of the control system. According to actual control needs, the module is equipped with isolation relays at each digital output signal, and there is no direct electrical connection between the load and the control system card. Once a load failure or power failure occurs, the damage is at most to the relay, and the loss is minimized; in addition, each relay output circuit is equipped with a protective fuse. Once a short circuit or failure occurs at a certain point, the fuse can be reliably blown to cut off the relevant signal, thereby ensuring the normal power supply and load, and preventing the expansion of damage or loss; the module wiring is fully integrated, which solves the possibility of signal line failure due to human error, thereby preventing the occurrence of the situation where the entire related control system is completely out of control due to human reasons.

[0011] The module power supply and each branch are equipped with status signal indicators to indicate that the signal is normal, making it easier to find the fault point. By checking the module, the error location can be quickly located and the fault point can be found, thereby improving maintenance efficiency and shortening maintenance time.

[0012] Finally, the module is small in size, supports installation on a variety of standard guide rails, generates little heat, and can be arranged in a centralized manner; the module is connected to the PLC / DCS via a nine-pin plug, which is convenient and quick; the module and signal source connection terminals are pluggable, which makes wiring convenient and flexible for debugging; the PLC / DCS digital input signals on the market are generally multiples of 8, and the use of this module allows for flexible configuration without wasting points. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 for Figure 1 There is a schematic diagram of the location of the active control output fuse;

[0016] Figure 3 for Figure 1 Schematic diagram of the location of the fuse for the common power supply control output;

[0017] Figure 4 for Figure 1 Schematic diagram of the location of the passive dry contact control output fuse.

[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0019] 1-epoxy resin base plate, 2-terminal identification, 3-power terminal, 4-power indicator light, 5-first voltage limiting resistor, 6-first fuse, 7-first wire, 8-second wire, 9-second fuse, 10-third fuse, 11-first control output terminal, 12-second control output terminal, 13-third control output terminal, 14-isolation relay, 15-status indicator light, 16-second voltage limiting resistor, 17-negative common line, 18-third wire, 19-controller power input terminal, 20-plug, 21-interface, 22-control system card. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0022] See also Figure 1 The utility model provides a technical solution: a PLC / DCS digital output relay module, including an epoxy resin base plate 1 and a terminal mark 2 fixed on the surface thereof, two power terminals 3 for connecting a load power supply, a first fuse 6, a second fuse 9, a third fuse 10, a first control output terminal 11, a second control output terminal 12, a third control output terminal 13, an isolation relay 14, two controller power input terminals 19 and a plug 20, the load power supply voltage is DC24V, and the polarity of the load power supply can be changed according to demand, the terminal mark 2 corresponds to the two power terminals 3 for connecting a load power supply, the first control output terminal 11, the second control output terminal 12, the third control output terminal 13 and the two controller power input terminals 19, and the terminal mark 2 is respectively a one-to-one corresponding VCC terminal, a COM terminal, a 1NC terminal, a 1COM terminal, a 1NO terminal and two V-terminals, the VCC terminal and the COM terminal of the power terminal 3 are respectively connected to the second wire 8 and the first wire 7, the first fuse 6 and the power indicator light 4 are connected in series between the second wire 8 and the first wire 7, and the third fuse 10 is switched and connected to the first wire 7. and 1COM terminal, the second fuse 9 is switched and connected between the COM terminal of the isolation relay 14 and the second wire 8 or the 1COM terminal, the NC and NO terminals of the isolation relay 14 are respectively connected to the 1NC terminal and the 1NO terminal, the positive terminal of the coil of the isolation relay 14 is connected to the plug 20 through the third wire 18, a status indicator light 15 is connected in series between the positive terminal and the negative terminal of the coil of the isolation relay 14, the negative terminal of the coil of the isolation relay 14 is also connected to the plug 20 and two V-terminals through the negative common line 17, there are four working modes of the control output terminal, the controller power input terminal Sub 19 is used to facilitate the connection of the negative pole of the controller power supply and multiple modules in parallel. The isolation relay 14 serves as the signal isolation between the controller output signal and the load, and plays a role in protecting the controller, voltage, and signal conversion. The status indicator light 15 indicates the output status of the controller. The plug 20 is used to connect the control signal of the module and the controller. The load power supply is only connected to the COM end of the power terminal 3. When the VVC end of the power terminal 3 is not connected, it can be DC24V or AC220V. At this time, the output signal terminal power supply can be selected as the COM end power supply, which needs to be connected to the third fuse 10 to achieve.

[0023] A first voltage-limiting resistor 5 is connected in series between the first fuse 6 and the power indicator light 4 , and a second voltage-limiting resistor 16 is connected in series between the positive end and the negative end of the coil of the isolation relay 14 .

[0024] The power indicator light 4, the first voltage-limiting resistor 5, the first fuse 6, the status indicator light 15 and the second voltage-limiting resistor 16 are detachably connected to the epoxy resin base plate 1 via connectors, so as to facilitate maintenance and replacement.

[0025] The NC and NO terminals of the isolation relay 14 are respectively connected to the 1NC terminal and the 1NO terminal through thin enameled wires, which is convenient for connection.

[0026] The plug 20 is a nine-pin plug, which includes nine interfaces 21, namely, a 0.1 interface, a 0.2 interface, a 0.3 interface, a 0.4 interface, a 0.5 interface, a 0.6 interface, a 0.7 interface, a 0.8 interface and a V-interface.

[0027] The 0.1 interface is connected to the positive pole of the output power voltage of the third wire 18 and the control system card 22, and the V- interface is connected to the two V- terminals. There are four working modes of the control output terminal, including form one is active DC24V output, the VVC terminal of the power terminal 3 is the positive pole, the COM terminal of the power terminal 3 is the negative pole, and the positive pole is controlled to be on and off; form two is active DC24V output, the VVC terminal of the power terminal 3 is the negative pole, the COM terminal of the power terminal 3 is the positive pole, and the negative pole is controlled to be on and off; form three is active DC24V or AC220V output, and the COM terminal and the VVC terminal of the power terminal 3 are not connected; form four is that both the VVC terminal and the COM terminal of the power terminal 3 are not connected, and the output is a dry contact in conjunction with the fuse state, and the isolation relay 14 acts as a coil control as the controller output signal, and the output terminals of the isolation relay 14 are respectively connected to the output terminals through fuses, and the output terminals of the isolation relay 14 have two states, NO and NC, and whether it is output is indicated by the status indicator light 15.

[0028] Specifically, the power supply is placed in the power supply terminal 3, the COM terminal and the VVC terminal of the power supply are respectively led out through the first wire 7 and the second wire 8, and extended to the eighth channel. The control system card 22 outputs the positive pole of the power supply voltage to the 0.1 interface of the plug 20, and is connected to the isolation relay 14 through the third wire 18. The positive end of the isolation relay 14 coil is energized, and the negative pole of the control system voltage is on the negative common line 17. The isolation relay 14 is energized, and the second voltage limiting resistor 16 divides the voltage, and the status indicator light 15 lights up, so that the second control output terminal 12 and the third control output terminal 13 are connected, and the first control output terminal and the second control output terminal 12 are disconnected, so as to achieve the purpose of the PLC / DCS system controlling the output states of the three control output terminals;

[0029] like Figure 2As shown, the second fuse 9 and the third fuse 10 are in position, the second control output terminal 12 is connected to the COM terminal of the power terminal 3 through the third fuse 10, and the isolation relay 14 controls the output COM terminal to be connected to the VVC terminal of the power terminal 3 through the second fuse 9. At this time, the voltage requirement of the power terminal 3 is DC24V, and the polarity can be flexibly configured according to the actual control requirements of the load. When the isolation relay 14 is not in action, there is a DC24V voltage between the first control output terminal 11 and the second control output terminal 12, and the voltage polarity is the same as the voltage polarity of the power terminal 3. When the isolation relay 14 is in action, there is a DC24V voltage between the second control output terminal 12 and the third control output terminal 13, and the voltage polarity is the same as the voltage polarity of the power terminal 3.

[0030] like Figure 3 As shown, the second fuse 9 and the third fuse 10 are in position. In this state, the COM end of the power terminal 3 can be connected to the corresponding power supply voltage according to the load demand, and the VVC end of the power terminal 3 is prohibited from being connected. The second control output terminal 12 is connected to the COM end of the power terminal 3 through the third fuse 10. The control output COM end of the isolation relay 14 is connected to the COM end of the power terminal 3 through the second fuse 9. At this time, the second control output terminal 12 is always energized. When the isolation relay 14 is not in action, the first control output terminal 11 has the same voltage as the second control output terminal 12. When the isolation relay 14 is in action, the third control output terminal 13 has the same voltage as the second control output terminal 12. This fuse configuration method can avoid the situation where short-circuiting parallel connection is required when multiple loads share a power supply, thereby improving the reliability of system operation.

[0031] like Figure 4 As shown, the second fuse 9 is in position. In this state, the output signals of the three control output terminals are passive dry contacts, which are independent of the power supply voltage of the power supply terminal 3. When the isolation relay 14 is not in operation, the first control output terminal 11 is connected to the second control output terminal 12, and the second control output terminal 12 is disconnected from the third control output terminal 13. When the isolation relay 14 is in operation, the first control output terminal 11 is disconnected from the second control output terminal 12, and the second control output terminal 12 is connected to the third control output terminal 13.

[0032] Based on the above-mentioned PLC / DCS digital output relay module, this embodiment applies the module to an example, as follows:

[0033] During the use of the module, if the DC24V solenoid valve is controlled on site, you can press Figure 2In the fuse configuration scheme shown, the VVC end of the power supply terminal 3 is connected to the DC24V positive pole, the COM end of the power supply terminal 3 is connected to the DC24V negative pole, and the positive and negative poles of the field solenoid valve power line are respectively connected to the third control output terminal 13+ and the second control output terminal 12-; when the PLC / DCS system outputs a control instruction, the 0.1 interface of the plug 20 receives the control voltage signal, then the isolation relay 14 is energized and actuated, the third control output terminal 13 is energized, and the field solenoid valve is actuated.

[0034] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0035] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A PLC / DCS digital output relay module, comprising an epoxy resin base plate (1) and a terminal mark (2) fixed on the surface thereof, two power terminals (3) for connecting a load power supply, a first fuse (6), a second fuse (9), a third fuse (10), a first control output terminal (11), a second control output terminal (12), a third control output terminal (13), an isolation relay (14), two controller power input terminals (19) and a plug (20), characterized in that: The load power supply voltage is DC24V, the terminal identifier (2) corresponds to the number of two power supply terminals (3) for connecting the load power supply, the first control output terminal (11), the second control output terminal (12), the third control output terminal (13) and the two controller power supply input terminals (19), and the terminal identifiers (2) are respectively a VCC terminal, a COM terminal, a 1NC terminal, a 1COM terminal, a 1NO terminal and two V-terminals corresponding to each other, the VCC terminal and the COM terminal of the power supply terminal (3) are respectively connected to the second wire (8) and the first wire (7), and a first fuse (6) and a power indicator light (4) are connected in series between the second wire (8) and the first wire (7). ), the third fuse (10) is switch-connected between the first wire (7) and the 1COM terminal, the second fuse (9) is switch-connected between the COM terminal of the isolation relay (14) and the second wire (8) or the 1COM terminal, the NC and NO terminals of the isolation relay (14) are respectively connected to the 1NC terminal and the 1NO terminal, the positive terminal of the coil of the isolation relay (14) is connected to the plug (20) through the third wire (18), a status indicator light (15) is connected in series between the positive terminal and the negative terminal of the coil of the isolation relay (14), and the negative terminal of the coil of the isolation relay (14) is also connected to the plug (20) and two V-terminals through a negative common line (17).

2. A PLC / DCS digital output relay module according to claim 1, characterized in that: A first voltage-limiting resistor (5) is connected in series between the first fuse (6) and the power indicator light (4), and a second voltage-limiting resistor (16) is also connected in series between the positive end and the negative end of the coil of the isolation relay (14).

3. A PLC / DCS digital output relay module according to claim 2, characterized in that: The power indicator light (4), the first voltage-limiting resistor (5), the first fuse (6), the status indicator light (15) and the second voltage-limiting resistor (16) are detachably connected to the epoxy resin base plate (1) via a plug-in connector.

4. A PLC / DCS digital output relay module according to claim 1, characterized in that: The NC and NO terminals of the isolation relay (14) are respectively connected to the 1NC terminal and the 1NO terminal through thin enameled wires.

5. A PLC / DCS digital output relay module according to claim 1, characterized in that: The plug (20) is a nine-pin plug, comprising nine interfaces (21), namely, a 0.1 interface, a 0.2 interface, a 0.3 interface, a 0.4 interface, a 0.5 interface, a 0.6 interface, a 0.7 interface, a 0.8 interface and a V-interface.

6. A PLC / DCS digital output relay module according to claim 5, characterized in that: The 0.1 interface is connected to the third wire (18) and the positive pole of the output power voltage of the control system card (22), and the V-interface is connected to two V-terminals.

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