An output relay module connected with a small PLC

Abstract

The utility model discloses a kind of output relay module connected with small PLC, it is related to industrial automation control field, it includes integrated multiple relay, relay pluggable base, the PCB printed circuit board of insulating terminal, the public port left side and right side of each relay are respectively equipped with 24V and L1 public input end, the output interface of the PLC is connected to the coil of multiple relay;One of the two normally open contacts of the relay is connected with the COM end in the preset insulating terminal, another is connected with the Y end in the preset insulating terminal, and the required signal is amplified and output to external equipment by control signal in turn sorting.This utility model can quickly complete to solve the labor of overall electric box wiring complex, integrate non-standard into standard, save labor, reduce overall electric cabinet volume, prevent error, meet domestic and international certification standards.

Description

Technical Field

[0001] This utility model relates to the field of industrial automation control, specifically to an output relay module that connects to a small PLC. Background Technology

[0002] In the field of industrial control, PLC (Programmable Logic Controller) is a common control device. It has internal memory and is equipped with input and output components. The digital output signals of a PLC are usually presented in the form of high and low levels or relay contacts. Since directly using the output signals to control conventional controlled objects such as solenoid valves and pumps may affect the lifespan of the PLC, in practical applications, intermediate relays are generally used to convert the PLC output signals into on / off state signals of relay contacts, thereby realizing the state switching of the controlled object.

[0003] The signals are primarily switching signals. PLCs have multiple switch output interfaces, and different control systems are often composed of various controlled objects combined in different ways. In traditional control circuit construction, manual wiring is required: connecting the PLC's output interfaces to relay coils one by one according to their addresses, and then manually connecting the contacts of different relays to the correct pins of the corresponding output sockets on the controller's rear panel according to the system assembly drawings. This method not only leads to low efficiency for assembly personnel but also easily results in wiring errors. However, simply using circuit boards to fix the entire control circuit is insufficient to meet the needs of complex and ever-changing control systems.

[0004] Therefore, there is a need for an output relay module that is quick to build, easy to set up, has switchable working modes, and is highly compatible. Utility Model Content

[0005] To address the technical problems mentioned above, this utility model provides an output relay module that connects to a small PLC. This module can quickly resolve the complex wiring issues in the overall electrical box, integrate non-standard wiring into standard wiring, save labor, reduce the overall size of the electrical cabinet, prevent errors, and comply with domestic and international certification standards.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] This utility model provides an output relay module for connection to a small PLC, which includes a PCB printed circuit board integrating multiple relays, a pluggable relay base, and insulated terminals. Each relay has a 24V and an L1 common input terminal on its left and right sides, respectively.

[0008] The output interface of the PLC is connected to the coils of multiple relays;

[0009] Of the two normally open contacts of the relay, one is connected to the preset COM terminal in the insulating terminal block, and the other is connected to the preset Y terminal in the insulating terminal block. The required signals are amplified and output to external devices in sequence through control signals.

[0010] It also includes a bridge jumper for connecting the common port of adjacent relays to a common signal source, so that adjacent or multiple relays amplify the output of the same signal;

[0011] It also includes a connecting block with the same pin size as the relay and capable of replacing the relay for outputting pulse signals.

[0012] According to some embodiments of this utility model, the PLC output interface supplies power to the coil of the relay through a cable and an electrical connector, driving the relay to perform on / off actions.

[0013] According to some embodiments of this utility model, the relay, the removable relay base, the insulated terminal block and the electrical connector are automatically soldered onto the PCB printed circuit board by wave soldering.

[0014] According to some embodiments of the present invention, each of the relays is equipped with an independent common input terminal, enabling each relay to independently output / input different signals for amplification.

[0015] According to some embodiments of this utility model, a protective shell made of flame-retardant ABS material is also included.

[0016] Compared with existing technologies, one or more of the above technical solutions have the following beneficial effects:

[0017] First, this utility model realizes the function of quick connection and conversion between two usage scenarios: independent use of the COM terminal of the relay output signal and multiple relays amplifying the output to the same common signal source.

[0018] Specifically, by designing two switchable modes, "independent work" and "synchronous work," the system meets the needs of different scenarios:

[0019] Independent working mode: Each relay is equipped with an independent common input terminal, which can receive different signal sources (such as 24V or L1) to achieve independent control of multiple external devices (such as driving solenoid valves, indicator lights, etc.).

[0020] Synchronous working mode: With the help of two or three bridge jumpers, the common port of multiple relays can be quickly connected to the same signal source to achieve synchronous amplification output (such as controlling multiple groups of devices to start and stop at the same time).

[0021] Switching between the two modes requires no rewiring; it can be done simply by plugging and unplugging the jumper, making it flexible and adaptable to control systems ranging from simple to complex.

[0022] Secondly, this utility model also solves the shortcoming of similar relay module products that cannot transmit pulse signals, and has stronger compatibility;

[0023] Finally, this utility model can quickly connect to the PLC output during assembly, eliminating the need for complex manual wiring, significantly shortening the overall wiring time of the electrical control box, upgrading from "non-standard manual operation" to "standardized module assembly", and significantly improving the construction efficiency. Attached Figure Description

[0024] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0025] Figure 1 This is the circuit schematic diagram of this utility model in Embodiment 1.

[0026] Figure 2 This is a schematic diagram illustrating the application of this utility model in an integrated electrical control box.

[0027] Figure 3 This is a schematic diagram of the bridge-type shorting piece (three-position and two-position) in this utility model.

[0028] Figure 4 This is a comparative schematic diagram of the connecting conductor block and the relay in this utility model.

[0029] Among them, 100 is a relay, 200 is a pluggable relay base, 300 is an insulated terminal block, 400 is a PCB printed circuit board, 500 is an electrical connector, 600 is a common input terminal, 700 is a bridge jumper, 800 is a connecting block, and 900 is an output relay module. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention is described.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] like Figure 1 as well as Figure 2 The diagram shows an output relay module for connection to a small PLC, comprising a PCB printed circuit board 400 integrating multiple relays 100, a removable relay base 200, and insulated terminals 300. Each relay 100 has a 24V and an L1 common input terminal 600 on its left and right sides, respectively. Its distinguishing feature is:

[0034] The output interface of the PLC is connected to the coils of multiple relays 100;

[0035] Of the two normally open contacts of the relay 100, one NO-1 is connected to the preset COM terminal in the insulating terminal block, and the other NO-2 is connected to the preset Y terminal in the insulating terminal block. The required signals are amplified and output to external devices in sequence through control signals.

[0036] It also includes a bridge jumper 700 for connecting the common port of adjacent relays to a common signal source, so that adjacent or multiple relays 100 amplify the output of the same signal.

[0037] It also includes a connecting block 700 with the same pin size as the relay and capable of being plugged into and removed from the relay 100, for outputting pulse signals.

[0038] The PLC output interface supplies power to the coil of the relay 100 through a cable and electrical connector 500, driving the relay 100 to perform on / off actions.

[0039] The relay 100, the relay pluggable base 200, the insulated terminal block 300, and the electrical connector 500 are automatically soldered onto the PCB printed circuit board 400 by wave soldering.

[0040] Each of the relays 100 is equipped with an independent common input terminal 600, enabling each relay 100 to independently output / input different signals for amplification.

[0041] This embodiment takes the control scenario of a small automated production line as an example to explain in detail the structure, assembly and working process of the output relay module described in this application, so as to demonstrate its advantages of "quick setup, simple operation, switchable modes and strong compatibility".

[0042] I. Module Composition and Assembly

[0043] The output relay module in this embodiment specifically includes the following components:

[0044] Protective housing: Made of flame-retardant ABS material, measuring 120mm×80mm×30mm, used to protect internal components and isolate external interference;

[0045] PCB printed circuit board: made of FR-4 material, 1.6mm thick, with standardized wiring printed on the surface, integrating signal transmission paths;

[0046] Power relays and pluggable bases: 8 sets of DC 24V power relays are selected, with pluggable bases (5mm spacing) soldered to the preset positions on the PCB circuit board;

[0047] Electrical connector: 16-pin aviation connector (2.54mm pitch), soldered to the input end of the PCB board for connecting PLC output signals;

[0048] Insulated terminal blocks: Includes 8 Y ports (Y0-Y7) and 8 COM ports (COM0-COM7), each Y port corresponds to 1 relay output, and the COM ports are common terminals;

[0049] Connecting conductor: Made of copper conductive material, its size is perfectly matched to the relay pins (5mm spacing), used to replace the relay to transmit pulse signals;

[0050] Bridge-type jumper: Includes 2 sets of two-position jumpers and 2 sets of three-position jumpers (copper-plated gold, 0.3mm thick), used to connect multiple relay common ports.

[0051] Assembly process: The electrical connectors, 8 sets of relay bases, and insulating terminals are automatically soldered to the PCB board using wave soldering; the 8 power relays are manually inserted into their corresponding bases and the protective housing is fastened; finally, a modular finished product is formed.

[0052] II. Connection and Working Process with PLC

[0053] Taking the "conveyor belt start / stop, indicator light switching, and motor speed adjustment" of a small PLC-controlled production line as an example, the specific connection and operation are as follows:

[0054] Signal access:

[0055] The PLC's eight digital output interfaces (DOY0-DOY7) are connected to the module's electrical connector via a shielded twisted-pair multi-core wire harness (16 cores, with the shield grounded). The two ends of the wire harness have pre-made terminals via dedicated conversion connectors, eliminating the need for manual wiring; signal access can be completed simply by plugging and unplugging.

[0056] Independent working mode (controls conveyor belt and indicator lights):

[0057] It is necessary to control two independent conveyor belts (A and B) and three indicator lights (red, yellow, and green), each of which must start and stop independently.

[0058] Connect the COM port of relay KA1 (corresponding to Y0) to 24V+ to receive control signals from the PLC, and connect the Y0 port to the contactor coil of conveyor belt A to achieve independent control of A;

[0059] The COM1 port of relay KA2 (corresponding to Y1) is connected to 24V+, and the Y1 port is connected to the contactor coil of conveyor belt B to realize independent control of B;

[0060] Relays KA3-KA5 (corresponding to Y2-Y4) are connected to red, yellow, and green indicator lights respectively. COM2-COM4 ports are connected to 24V+ or L1 (AC 220V) as needed to achieve independent driving of different voltages.

[0061] In this mode, each relay receives a signal through an independent common input terminal (COM port), requiring no additional wiring.

[0062] Synchronous working mode (controlling multiple valves):

[0063] The production line requires 3 sets of solenoid valves (V1-V3) to open / close simultaneously, and synchronous signal output is required:

[0064] Remove the common port isolation piece of relays KA6-KA8 (corresponding to Y5-Y7), use a three-position bridge jumper to short-circuit the 24V common input terminal of the three relays, and connect them to the same 24V+ signal source;

[0065] The Y5-Y7 ports are connected to the coils of V1-V3 respectively. The control signals of the PLC are transmitted synchronously through the bridge jumper to realize the simultaneous operation of the three sets of solenoid valves.

[0066] The switching process only requires plugging and unplugging the jumper; no rewiring is required.

[0067] Pulse signal transmission (motor speed control):

[0068] The production line motors need to have their speed adjusted via pulse signals (500Hz) output from the PLC; traditional relays cannot transmit this signal.

[0069] Remove the relay KA3, which controls the motor, from the base and insert a matching connecting block;

[0070] The connecting block directly connects the PLC's pulse signal to the Y2 output port, which in turn connects to the pulse input terminal of the motor driver, achieving delay-free transmission.

[0071] The replacement process requires no rewiring, thus solving the pulse transmission bottleneck of traditional modules.

[0072] The above embodiments fully demonstrate the practicality and advantages of this output relay module in industrial control scenarios.

[0073] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An output relay module for connection to a small PLC, comprising a PCB circuit board integrating multiple relays, a pluggable relay base, and insulated terminals, wherein each relay has a 24V and an L1 common input terminal on its left and right sides, respectively, characterized in that: The output interface of the PLC is connected to the coils of multiple relays; Of the two normally open contacts of the relay, one is connected to the preset COM terminal in the insulating terminal block, and the other is connected to the preset Y terminal in the insulating terminal block. The required signals are amplified and output to external devices in sequence through control signals. It also includes a bridge jumper for connecting the common port of adjacent relays to a common signal source, so that adjacent or multiple relays amplify the output of the same signal; It also includes a connecting block with the same pin size as the relay and capable of replacing the relay for outputting pulse signals.

2. The output relay module for connection to a small PLC according to claim 1, characterized in that, The PLC output interface supplies power to the relay coil via cables and electrical connectors, driving the relay to perform on / off actions.

3. The output relay module for connection to a small PLC according to claim 2, characterized in that, The relay, the pluggable relay base, the insulated terminals, and the electrical connector are automatically soldered onto the PCB printed circuit board via wave soldering.

4. The output relay module for connection to a small PLC according to claim 1, characterized in that, Each of the relays is equipped with an independent common input terminal, enabling each relay to independently output / input different signals for amplification.

5. The output relay module for connection to a small PLC according to claim 1, characterized in that, It also includes a protective shell made of flame-retardant ABS material.

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