Marine integrated relay contact expansion device

Abstract

The utility model relates to a marine integrated relay contact expansion device, which comprises a power interface unit, a 24V-to-5V unit, a delay master control unit, a delay relay master control unit, a delay contact unit, a relay unit, an output unit and a delay contact function selection unit, the redundant design that the relays are mutually independent is adopted, the relays operate independently, when a certain system breaks down, other systems can still work normally, the operation stability and reliability of the marine electrical system are greatly improved, and system paralysis caused by local faults is prevented; the adjustable delay time contact brings great flexibility to ship electrical control, and the delay time of the contact can be adjusted according to the characteristics of a large ship motor to avoid current impact like starting of the large ship motor; the automatic control system can accurately set time delay according to the technological process, is adaptive to complex ship application scenes, and assists intelligent and accurate control of an electrical system.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of marine electrical control, and specifically relates to a marine integrated relay contact expansion device. BACKGROUND

[0002] In the whole life cycle of the ship, the ship repair and reconstruction as a key link plays an indispensable role in maintaining and improving the performance of the ship. Nowadays, the shipping industry is booming, and the demand for upgrading the electrical system of old ships is becoming more and more intense. However, there are many difficult problems in the electrical system of the old ship at present. On the one hand, the number of relay control ports is seriously insufficient, which is like shackling the expansion of the ship function, greatly limiting the further improvement and promotion of the ship function. On the other hand, the electrical system wiring is disorderly and lacks scientific and reasonable planning layout, which makes the work of adding relay control contacts more difficult, and the implementation process faces many obstacles. Moreover, the International Maritime Organization (IMO) and various national ship classification societies continue to update the regulations and standards of ships in safety, environmental protection and other aspects. These strict new regulations require ships to add a large number of control devices, which undoubtedly makes the contradiction between the demand for the number of relay contacts and the existing resources more acute, further exacerbating the difficulties faced by the electrical system of old ships.

[0003] In the prior art, in order to meet the demand of new equipment and function upgrade, it is often necessary to additionally add multiple relays, which not only leads to the complication of wiring work, but also may increase the size of the control box, and even need to replace the entire control box. These operations face many difficulties in the actual ship modification scene, which seriously hinders the adaptability of the ship electrical system to the changes of regulations and standards. Therefore, the technical personnel in the field provides a marine integrated relay contact expansion device, which aims to effectively solve the problems of insufficient number of relay contacts and complex wiring in the modification of the electrical system of old ships by integrating multiple types of contacts and delay control functions, and improve the reliability and flexibility of the ship electrical system. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a marine integrated relay contact expansion device to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0006] A marine integrated relay contact expansion device, comprising a power interface unit, a 24V to 5V unit, a delay main control unit, a delay relay main control unit, a delay contact unit, a relay unit, an output unit and a delay contact function selection unit.

[0007] The 24V to 5V unit is electrically connected with the power interface unit.

[0008] The delay control unit is electrically connected with the 24V-5V unit;

[0009] The delay relay control unit is electrically connected with the delay control unit;

[0010] The delay contact unit is electrically connected with the delay relay control unit;

[0011] The relay unit is electrically connected with the delay control unit through the input unit, and is also electrically connected with the 24V-5V unit;

[0012] The output unit is electrically connected with the relay unit;

[0013] The delay contact function selection unit is electrically connected with the delay control unit.

[0014] The 24V-5V unit is electrically connected with the power display unit, and the delay control unit is electrically connected with the program download unit.

[0015] As a further scheme of the utility model, the relay unit is electrically connected with the buzzer alarm unit and the LED lamp indication unit respectively, and the buzzer alarm unit is also electrically connected with the delay relay control unit.

[0016] As a further scheme of the utility model, the relay unit comprises relay bases K1 and K2, and power relays are respectively installed on the relay bases K1 and K2; the relay unit further comprises signal relays K3 and K4; the input unit comprises a wiring terminal U4, and No. 1 pin of the wiring terminal U4 is connected with No. 1 pin of the relay base K1, No. 6 pin of the relay base K2, No. 5 pin of the signal relay K3 and No. 4 pin of the signal relay K4.

[0017] As a further scheme of the utility model, the output unit comprises a 24V active output unit and a passive output unit; the 24V active output unit comprises a wiring terminal U5, and No. 2 pin of the wiring terminal U5 is connected with No. 6 pin of the relay base K1; the passive output unit comprises wiring terminals U6, U7, U8, U9 and U10; No. 1 and 2 pins of the wiring terminal U6 are connected with No. 6 and 5 pins of the relay base K2 respectively; No. 1, 2 and 3 pins of the wiring terminal U7 are connected with No. 5, 6 and 7 pins of the signal relay K3 respectively; No. 1, 2 and 3 pins of the wiring terminal U8 are connected with No. 4, 3 and 2 pins of the signal relay K3 respectively; No. 1, 2 and 3 pins of the wiring terminal U9 are connected with No. 5, 6 and 7 pins of the signal relay K4 respectively; and No. 1, 2 and 3 pins of the wiring terminal U10 are connected with No. 4, 3 and 2 pins of the signal relay K3 respectively.

[0018] As a further scheme of the utility model: the delay main control unit includes control chip U11, and the no. 1 pin of wiring terminal U4 is connected with the no. 6 pin of control chip U11;The delay contact function selection unit includes dial switch SW1 and dial switch SW2;The no. 1, 2, 3 pins of dial switch SW1 are connected with the no. 1, 2, 3 pins of control chip U11 respectively;The no. 1, 2, 3 pins of dial switch SW2 are connected with the no. 14, 13, 12, 11 pins of control chip U11 respectively.

[0019] As a further scheme of the utility model: the delay relay main control unit includes delay relay K5, photoelectric coupler U12 and triode Q1, the no. 1 pin of photoelectric coupler U12 is connected with the no. 6 pin of control chip U11 in series resistance R6, the no. 2 pin of photoelectric coupler U12 is connected with the no. 7 pin of control chip U11, the no. 4 pin of photoelectric coupler U12 is connected with the no. 6 pin of control chip U11, and the no. 3 pin is connected with the base of triode Q1 in series resistance R7, the emitter of triode Q1 is grounded, and the collector is connected with the anode of stabilizing diode D2, and the cathode is connected with the no. 6 pin of control chip U11;The no. 1 pin of delay relay K5 is connected with the cathode of stabilizing diode D2.

[0020] As a further scheme of the utility model: the delay contact unit includes wiring terminal U13, wiring terminal U14;The no. 1, 2, 3 pins of wiring terminal U13 are connected with the no. 5, 6, 7 pins of delay relay K5 respectively;The no. 1, 2, 3 pins of wiring terminal U14 are connected with the no. 4, 3, 2 pins of delay relay K5 respectively.

[0021] Compared with the prior art, the utility model has the beneficial effects that:

[0022] 1, adopt the redundancy design of independent relay, and each relay independently runs, when certain system fails, other system can still work normally, greatly promote the stability and reliability of marine electrical system operation, prevent the system from being paralyzed due to local fault.

[0023] 2、Integrated three unique contact types. Instant passive contact does not require external power supply, can instantaneously turn on and off the circuit, in the scene of high response speed requirement such as safety protection circuit, can quickly cut off the circuit to ensure the safety of the ship. Instant 24V active contact does not require external 24V power supply, internal power supply of the device, simplifies the external circuit, reduces wiring complexity and failure probability, improves integration, and has obvious advantages in limited ship space environment. Adjustable delay time contact brings great flexibility to ship electrical control, such as large ship motor start, which can adjust the contact delay time according to its characteristics to avoid current impact; The automation control system can also set the delay time accurately according to the process flow, adapt to complex ship application scenarios, and help the intelligent and accurate control of electrical system. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a block diagram of a marine integrated relay contact expansion device.

[0025] Figure 2 It is a circuit principle diagram of a delay main control unit in a marine integrated relay contact expansion device.

[0026] Figure 3 It is a circuit principle diagram of a 24V to 5V power supply unit in a marine integrated relay contact expansion device.

[0027] Figure 4 It is a power supply interface unit circuit principle diagram of a marine integrated relay contact expansion device.

[0028] Figure 5 It is an input unit circuit principle diagram of a marine integrated relay contact expansion device.

[0029] Figure 6 It is a relay unit circuit principle diagram of a marine integrated relay contact expansion device.

[0030] Figure 7 It is a 24V active output unit circuit principle diagram of a marine integrated relay contact expansion device.

[0031] Figure 8 It is a passive output unit circuit principle diagram of a marine integrated relay contact expansion device.

[0032] Figure 9 It is a circuit principle diagram of a delay relay main control unit in a marine integrated relay contact expansion device.

[0033] Figure 10 It is a circuit principle diagram of a delay contact unit in a marine integrated relay contact expansion device.

[0034] Figure 11It is a kind of integrated relay contact expansion device in a ship in delay contact function selection unit circuit schematic.

[0035] Figure 12 It is a kind of integrated relay contact expansion device in a ship in power display unit circuit schematic.

[0036] Figure 13 It is a kind of integrated relay contact expansion device in a ship in LED lamp indication unit circuit schematic.

[0037] Figure 14 It is a kind of integrated relay contact expansion device in a ship in program download unit circuit schematic.

[0038] Figure 15 It is a kind of integrated relay contact expansion device in a ship in alarm unit circuit schematic.

[0039] Figure 16 It is a kind of integrated relay contact expansion device in a ship in structure schematic.

[0040] Figure 17 It is a kind of integrated relay contact expansion device in a ship in back structure schematic. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0042] Please refer to Figures 1 to 17 In the embodiments of the present application, a kind of integrated relay contact expansion device in a ship, including power interface unit 1, 24V to 5V unit 2, delay main control unit 3, delay relay main control unit 4, delay contact unit 5, relay unit 6, output unit 7 and delay contact function selection unit 8;

[0043] The 24V to 5V unit is electrically connected with power display unit 9;

[0044] The delay main control unit is electrically connected with program download unit 10;

[0045] The relay unit is electrically connected with buzzer alarm unit 11 and LED lamp indication unit 12 respectively, and the buzzer alarm unit 11 is also electrically connected with the delay relay main control unit 4;

[0046] Specifically, the 24V-to-5V unit is electrically connected with the power interface unit; the delay main control unit is electrically connected with the 24V-to-5V unit; the delay relay main control unit is electrically connected with the delay main control unit; the delay contact unit is electrically connected with the delay relay main control unit and is used for outputting a delay contact; the relay unit is electrically connected with the delay main control unit through the input unit 13, and the relay unit is also electrically connected with the 24V-to-5V unit; the output unit is electrically connected with the relay unit; and the delay contact function selection unit is electrically connected with the delay main control unit.

[0047] The power interface unit is connected with an external 24V power supply, and the 24V-to-5V power unit is used for converting 24V voltage into 5V voltage and supplying power to the relay unit and the delay main control unit. Specifically, the 24V-to-5V power unit is internally provided with a high-performance DC / DC step-down module, and can convert 24V DC voltage provided by a ship system into 5V standard voltage output. It should be noted that, in terms of physical layout, the 24V-to-5V power unit adopts a patch type packaging process, is integrated with the relay unit and the delay main control unit on the same PCB board, and forms a highly compact modular structure. The volume of the 24V-to-5V power unit only accounts for 15% of the overall device, but can supply power to multiple core modules at the same time. The power interface unit includes a wiring terminal U3, a No. 1 pin of the wiring terminal U3 is grounded, and a No. 2 pin is used for connecting a 24V power supply. A circuit principle diagram of the power interface unit is shown in Figure 4 The utility model also includes a power display unit, the power display unit is electrically connected with the 24V-to-5V unit, wherein, Figure 12 A circuit principle diagram of the power display unit is shown in the figure. In the unit circuit, a resistor R1 and an LED1 are connected in series, the resistor R1 is grounded, and the LED1 is connected with a 5V power output end of the 24V-to-5V power unit to form a 5V power output end. The unit is integrated on a front operation panel of the device, and forms a highly intuitive state display interface.

[0048] The utility model also includes a program download unit, the program download unit is electrically connected with the delay main control unit, and the program download unit is used for program download of the delay main control unit. Figure 14 A circuit principle diagram of the program download unit is shown in the figure. The program download unit includes a rectangular connector H1, and No. 1 and No. 2 pins of the rectangular connector H1 are connected with No. 10 and No. 9 pins of a control chip U11 respectively.

[0049] As shown in Figure 13 and 15 The utility model also includes a buzzer alarm unit and an LED lamp indication unit, which are electrically connected with the relay unit respectively, and the buzzer alarm unit is also electrically connected with the delay relay main control unit. Wherein, Figure 13 A circuit principle diagram of the LED lamp indication unit is shown in the figure. The LED lamp indication unit provides a device operation indicating lamp.Figure 15 The utility model discloses a circuit principle drawing for buzzer alarm unit, and the buzzer alarm unit is used for the failure alarm of device. The utility model is equipped with 5 LED lamps and buzzer alarm unit, and provides intuitive and comprehensive information feedback for the running state monitoring of equipment. When the device works normally, one LED lamp is always on, as the basic indication of the power-on running of equipment, so that the operator can confirm that the device has started at a glance. The remaining 4 LED lamps correspond to the running state of the 4 independent systems of contact respectively. This means that the operator can understand the working condition of each independent system in real time by observing the on-off state of the 4 LED lamps, and discover potential problems in time. At the same time, the buzzer is in a silent state, indicating that the system is running normally. However, as soon as the device fails, the whole monitoring feedback mechanism will start immediately. The indicator light corresponding to the failure will be extinguished quickly, informing the operator of the specific system where the failure is in a conspicuous way. At the same time, the buzzer starts to work and emits a sharp alarm sound, attracting the attention of the operator, ensuring that the failure can be detected in time. This light-sound combined alarm mode greatly improves the failure warning effect and effectively avoids the expansion of failure caused by human negligence. This sound-light combined alarm mode can attract the attention of the crew in time even if they are not near the indicator light in the complex ship environment. In addition, considering the complexity of the ship sailing environment, the LED lamp indication unit has good environmental adaptability. The indicator light adopts the design of LED lamp, so that the crew can clearly see the state of the indicator light even in the condition of direct sunlight or dim light. Moreover, the indicator light and the buzzer can be subjected to special protection treatment (such as three-proof paint spraying, sealing treatment, etc.), which can resist the influence of adverse environmental factors such as moisture, salt mist and vibration, and ensure reliable work in various conditions.

[0050] As shown in Figure 6 and Figure 5 , wherein, Figure 6 is a circuit principle drawing of a relay unit, Figure 5 is a circuit principle drawing of an input unit. The relay unit includes relay bases K1 and K2 for plugging and expanding relays. The relay unit further includes signal relays K3 and K4. The input unit includes a wiring terminal U4, and the No. 1 pin of the relay base K1, the relay base K2, the signal relay K3 and the signal relay K4 are connected with the No. 1 pin of the wiring terminal U4.

[0051] Among them, K4 and K3 and K5 are signal relays, and K1 and K2 are relay bases.

[0052] The input unit is used for the input of external signals; the relay unit is used for providing passive contacts and active contacts.

[0053] The relay unit is the core component for realizing the control function of the device, which can provide passive contacts and active contacts to meet different circuit control requirements.

[0054] In addition, during the operation of the ship electrical system, reliability is a core element related to the safe navigation of the ship and the smooth development of various operations. Due to the long-term presence of the ship in a complex and harsh marine environment, the risk of equipment failure is significantly increased, so it is crucial for marine electrical equipment to have a high degree of reliability and redundancy design. The utility model fully considers this in the design, divides the internal contacts into five independent systems (i.e. five independent relays, specifically power relays installed on signal relays K3, signal relays K4, signal relays K5, relay base K1 and relay base K2, a total of five independent relays), if one of the contacts fails due to complex factors such as moisture, salt spray corrosion, vibration impact or electrical overload, the remaining contacts can continue to function. They can quickly take over the work of the faulty relay expansion module to ensure that the control function of the entire system is not affected and continues to operate stably and reliably.

[0055] The output unit includes a 24V active output unit 14 and a passive output unit, wherein the circuit schematic diagram of the 24V active output unit is as shown in Figure 7 The circuit schematic diagram of the passive output unit is as shown in Figure 8 Specifically, the 24V active output unit includes a terminal U5, and the No. 2 pin of the terminal U5 is connected with the No. 6 pin of the relay base K1. The passive output unit includes terminals U6, U7, U8, U9 and U10, the No. 1 and No. 2 pins of the terminal U6 are connected with the No. 6 and No. 5 pins of the relay base K2 respectively, the No. 1, No. 2 and No. 3 pins of the terminal U7 are connected with the No. 5, No. 6 and No. 7 pins of the signal relay K3 respectively, the No. 1, No. 2 and No. 3 pins of the terminal U8 are connected with the No. 4, No. 3 and No. 2 pins of the signal relay K3 respectively, the No. 1, No. 2 and No. 3 pins of the terminal U9 are connected with the No. 5, No. 6 and No. 7 pins of the signal relay K4 respectively, and the No. 1, No. 2 and No. 3 pins of the terminal U10 are connected with the No. 4, No. 3 and No. 2 pins of the signal relay K3 respectively.

[0056] The output unit outputs passive contacts, and the 24V active output unit is used for outputting active contacts.

[0057] As Figure 2The circuit schematic of the delay master control unit is shown, which includes a control chip U11, and the No. 1 pin of the terminal U4 is connected with the No. 6 pin of the control chip U11. The delay contact function selection unit is used for the function selection of the delay contact, and the circuit schematic is as shown in the figure Figure 11 As shown, specifically, the delay contact function selection unit includes a code switch SW1 and a code switch SW2; the No. 1, 2, 3 pins of the code switch SW1 are respectively connected with the No. 1, 2, 3 pins of the control chip U11; and the No. 1, 2, 3 pins of the code switch SW2 are respectively connected with the No. 14, 13, 12, 11 pins of the control chip U11. Among them, the delay contact function selection has multiple gears, which respectively correspond to different delay function modes, such as: normally open (in this mode, the relay is not attracted, and the equipment is in the closed state), normally closed (in this mode, the delay contact is continuously attracted, and is not affected by the time parameter), single trigger (in this mode, the delay contact is attracted after T time, and is triggered once), cycle trigger (in this mode, the delay contact is attracted after T time, and is repeatedly cycled), etc. The operator can easily select the appropriate delay mode by turning the switch according to the needs of the specific equipment in the ship electrical system. In the system architecture, the delay time function selection switch of the code switch SW2 is of great significance. As the core control component, it mainly builds a delay time selection mechanism with diversified options for the delay contact. Its working principle is to allow users to select the delay time that fits the current use scenario, such as the starting characteristics of different ship equipment, the on-off requirements of different circuits, and actual needs, from the different function modes of the delay contact, such as short time delay, long time delay, multi-level delay, etc. This precise selection process can ensure precise control of the system in time logic, avoid equipment failure or low efficiency caused by improper delay time, and thus promote the efficient and stable operation of the entire system.

[0058] The delay master control unit is mainly used for the time logic control of the delay contact, adopts the STC15 series single-chip microcomputer, and has an internal integrated high-precision R / C clock. The delay master control unit undertakes the key task of time logic control of the delay contact in the whole system. This unit selects the STC15W408AS-35I-SOP16 single-chip microcomputer in the STC15 series. The single-chip microcomputer has an internal integrated high-precision R / C clock, can provide accurate and stable time logic control for the delay contact, and ensures the accuracy and reliability of the system in time control.

[0059] As Figure 9The diagram shows the circuit schematic of the main control unit for the time-delay relay. Specifically, the main control unit includes a time-delay relay K5, an optocoupler U12, and a transistor Q1. Pin 1 of the optocoupler U12 is connected in series with resistor R6 and then connected to pin 6 of the control chip U11. Pin 2 of the optocoupler U12 is connected to pin 7 of the control chip U11. Pin 4 of the optocoupler U12 is connected to pin 6 of the control chip U11. Pin 3 of the optocoupler U12 is connected in series with resistor R7 and then connected to the base of the transistor Q1. The emitter of the transistor Q1 is grounded, its collector is connected to the anode of the Zener diode D2, and its cathode is connected to pin 6 of the control chip U11. Pin 1 of the time-delay relay K5 is connected to the cathode of the Zener diode D2. U12 is the optocoupler, and K5 is the time-delay relay.

[0060] like Figure 10 The circuit diagram shown is of the delay contact unit. Specifically, the delay contact unit includes terminal U13 and terminal U14. Pins 1, 2, and 3 of terminal U13 are connected to pins 5, 6, and 7 of delay relay K5, respectively. Pins 1, 2, and 3 of terminal U14 are connected to pins 4, 3, and 2 of delay relay K5, respectively.

[0061] According to the ship integrated relay contact expansion device, five relays (a signal relay K3, a signal relay K4, a signal relay K5 and two power relays) are arranged, a plurality of contacts are arranged, and the independent redundant design is realized, and the instantaneous contact and the adjustable delay time contact are simultaneously arranged, wherein the signal relay K3 and the signal relay K4 output passive contacts, the delay relay K5 outputs delay contacts, one of the two power relays arranged on the relay socket outputs an active normally open contact, and the other outputs a passive contact. In the embodiment, the ship integrated relay contact expansion device is specially designed for the complex requirements of the ship electrical system, in the actual ship running environment, the electrical system faces various challenges, such as humidity, vibration, electromagnetic interference and the like, and any factor can cause a contact system to malfunction. However, due to the redundant design, when a system fails, the other independent system can still work normally, and the entire ship electrical system can be ensured not to be paralyzed due to local failure. It is worth mentioning that the device integrates three unique contact types. The instantaneous passive contact does not need external power supply support, and can complete the on-off action of the circuit in an instant, and can play an efficient role in some simple circuit scenes with low power supply requirements and fast response requirements, such as basic signal detection circuits. The instantaneous 24V active contact does not need to rely on the external 24V power supply, and the device can provide stable 24V power supply internally, further simplifying the external circuit and improving the integration. The contact with adjustable delay time gives great flexibility to the control of the ship electrical system. Users can flexibly adjust the delay time of the contact action according to the running characteristics and actual working conditions of different equipment on the ship, such as avoiding current impact when starting a large ship motor, accurately controlling the automatic control system according to a specific process flow, and the like, so that the ship integrated relay contact expansion device can accurately adapt to various complex and changeable ship application scenarios.

[0062] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, and all should be covered in the protection scope of the utility model.

Claims

1. An integrated relay contact expansion device for marine use, characterized by, The power interface unit, the 24V-5V unit, the delay main control unit, the delay relay main control unit, the delay contact unit, the relay unit, the output unit and the delay contact function selection unit are connected electrically. The 24V-5V unit is connected electrically with the power interface unit. The delay main control unit is connected electrically with the 24V-5V unit. The delay relay main control unit is connected electrically with the delay main control unit. The delay contact unit is connected electrically with the delay relay main control unit. The relay unit is connected electrically with the delay main control unit through the input unit, and the relay unit is also connected electrically with the 24V-5V unit. The output unit is connected electrically with the relay unit. The delay contact function selection unit is connected electrically with the delay main control unit.

2. An integrated relay contact expander device for marine use according to claim 1, characterized in that, The 24V-5V unit is connected electrically with the power display unit, and the delay main control unit is connected electrically with the program download unit.

3. An integrated relay contact expander device for marine use according to claim 1, characterized in that, The relay unit is connected electrically with the buzzer alarm unit and the LED lamp indication unit respectively, and the buzzer alarm unit is also connected electrically with the delay relay main control unit.

4. An integrated relay contact expander device for marine use according to claim 3, characterized in that The relay unit comprises relay bases K1 and K2, and power relays are installed in the relay bases K1 and K2 respectively. The input unit comprises a wiring terminal U4, and the No.1 pin of the wiring terminal U4 is connected with the No.1 pin of the relay bases K1, K2, signal relays K3 and K4 respectively.

5. An integrated relay contact expander device for marine use according to claim 1, characterized in that, The output unit comprises a 24V active output unit and a passive output unit. The 24V active output unit comprises a wiring terminal U5, and the No.2 pin of the wiring terminal U5 is connected with the No.6 pin of the relay base K1. The passive output unit comprises wiring terminals U6, U7, U8, U9 and U10, the No.1 and No.2 pins of the wiring terminal U6 are connected with the No.6 and No.5 pins of the relay base K2 respectively, the No.1, No.2 and No.3 pins of the wiring terminal U7 are connected with the No.5, No.6 and No.7 pins of the signal relay K3 respectively, the No.1, No.2 and No.3 pins of the wiring terminal U8 are connected with the No.4, No.3 and No.2 pins of the signal relay K3 respectively, the No.1, No.2 and No.3 pins of the wiring terminal U9 are connected with the No.5, No.6 and No.7 pins of the signal relay K4 respectively, and the No.1, No.2 and No.3 pins of the wiring terminal U10 are connected with the No.4, No.3 and No.2 pins of the signal relay K3 respectively.

6. An integrated relay contact expander device for marine use according to claim 1, characterized in that, The delay main control unit comprises a control chip U11, and the No.1 pin of the wiring terminal U4 is connected with the No.6 pin of the control chip U11; the delay contact function selection unit comprises code switches SW1 and SW2, the No.1, No.2 and No.3 pins of the code switch SW1 are connected with the No.1, No.2 and No.3 pins of the control chip U11 respectively, and the No.1, No.2, No.3 and No.11 pins of the code switch SW2 are connected with the No.14, No.13, No.12 and No.11 pins of the control chip U11 respectively.

7. An integrated relay contact expander device for marine use according to claim 1, characterized in that, The delay relay master control unit comprises a delay relay K5, a photoelectric coupler U12 and a triode Q1, the No.1 pin of the photoelectric coupler U12 is connected to the No.6 pin of a control chip U11 in series with a resistor R6, the No.2 pin of the photoelectric coupler U12 is connected to the No.7 pin of the control chip U11, the No.4 pin of the photoelectric coupler U12 is connected to the No.6 pin of the control chip U11, the No.3 pin of the photoelectric coupler U12 is connected to the base of the triode Q1 in series with a resistor R7, the emitter of the triode Q1 is grounded, the collector of the triode Q1 is connected to the anode of a voltage stabilizing diode D2, the cathode of the voltage stabilizing diode D2 is connected to the No.6 pin of the control chip U11; the No.1 pin of the delay relay K5 is connected to the cathode of the voltage stabilizing diode D2.

8. An integrated relay contact expander device for marine applications as defined in claim 1, wherein, The delay contact unit comprises a terminal U13 and a terminal U14, the No.1, 2, 3 pins of the terminal U13 are connected to the No.5, 6, 7 pins of the delay relay K5 respectively, the No.1, 2, 3 pins of the terminal U14 are connected to the No.4, 3, 2 pins of the delay relay K5 respectively.

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