A digital display relay

Abstract

This utility model discloses a digital display relay, including a base, a relay body, a delay / logic control unit, a power processing unit, a display element, and operation buttons. The base consists of an upper plate, a lower plate, and a connecting plate. The upper and lower plates are parallel, and the connecting plate vertically connects the two. The lower plate has 5 or 8 pins. The relay body is detachably connected between the upper and lower plates. The delay / logic control unit is integrated into the relay body and is used to receive relevant external signals. The power processing unit is located on the connecting plate and converts the pin input voltage (not exceeding 36V) into an internal operating voltage (not exceeding 24V). The display element and operation buttons are located on the upper plate and are connected to the delay / logic control unit for on-site setting. This digital display relay has an integrated structure, is compact in size, is compatible with both 5-pin and 8-pin configurations, allows for on-site visual setting, and is easy to maintain.

Description

Technical Field

[0001] This utility model relates to the field of relay module technology, specifically to a digital display relay. Background Technology

[0002] Most commercially available intermediate relay modules consist of two parts: the relay body and the fixed base, and only perform the most basic contact switching function. If time-delay control or simple logic operations are required, an external time relay, PLC, or dedicated control module must be connected, leading to: (1) The number of system components increases, the wiring becomes more complex, and the number of fault points increases accordingly; (2) It occupies additional guide rail space, making it difficult to meet the installation requirements of compact distribution boxes; (3) Costs are significantly increased, and multiple components need to be replaced or adjusted separately during maintenance; (4) Parameter setting depends on an external programmer or DIP switch, which is inconvenient for on-site operation.

[0003] On the other hand, most existing relays with delay functions use 8-pin or 1-pin standard bases with fixed pin functions, making it impossible to flexibly switch between 5-pin and 8-pin configurations. Furthermore, their internal power supply circuits typically require 110V or 220V AC power, which cannot meet the requirements for applications with safe voltages below 36V. Additionally, the power processing unit, delay / logic control unit, and display unit are often distributed across different areas of the PCB, making it difficult to compress the overall size to the same dimensions as a standard intermediate relay.

[0004] Therefore, the market urgently needs an "integrated, small-sized, low-voltage, field-configurable" digital display relay that can directly replace existing 5-pin or 8-pin intermediate relays and perform delay, logic control, and status indication without adding external components, thereby simplifying the system, reducing costs, and improving maintenance efficiency. Utility Model Content

[0005] To address the shortcomings of the prior art, this utility model provides a digital display relay.

[0006] The technical solution adopted in this utility model is: a digital display relay, comprising: A base, comprising an upper plate, a lower plate, and a connecting plate, wherein the upper plate and the lower plate are arranged in parallel, and the two ends of the connecting plate are perpendicularly connected to the upper plate and the lower plate respectively, and the lower plate is provided with N pins, where N is equal to 5 or 8; The relay body is detachably connected between the upper and lower plates; A delay / logic control unit, integrated within the relay body, is used to receive external delay or logic control signals; A power processing unit, disposed on the connection board, is used to convert a safe voltage of no more than 36V input to the pins into an internal operating voltage of no more than 24V. The display elements and operation buttons are all located on the upper panel and are connected to the delay / logic control unit for setting the delay time or logic function on site. When N=5, the pins of the lower plate only include the power input terminal and a set of relay changeover contacts; When N=8, the pins of the lower plate include a power input terminal and a set of relay switching contacts, as well as a delay / logic control signal input terminal and a relay status signal output terminal.

[0007] Furthermore, the connecting plate is biased towards one end of the upper and lower plates.

[0008] Furthermore, N=5, and the 5 pins are, in order: first power input pin, second power input pin, normally open contact pin, common contact pin, and normally closed contact pin.

[0009] Furthermore, N=8, and the 8 pins are as follows: first power input pin, second power input pin, normally open contact pin, common contact pin, normally closed contact pin, delay / logic control signal input pin, relay status signal output pin, and common reference pin.

[0010] Furthermore, the delay / logic control unit includes an EEPROM for saving the delay time and logic parameters set by the operation buttons when the power is off.

[0011] Furthermore, the display element is an OLED screen, which is directly driven by the 36V safety voltage after internal step-down.

[0012] The beneficial effects of this utility model are: 1. Integrated structure and miniaturized size: The relay body, power processing unit, delay / logic control unit, display element and operation buttons are all integrated on the base of a standard 5-pin or 8-pin intermediate relay. The high degree of integration reduces the size and significantly saves installation space.

[0013] 2. 5-pin / 8-pin compatible, flexible configuration: the same relay body can be adapted to either a 5-pin or 8-pin base. The 5-pin mode retains only the power supply and one set of changeover contacts, suitable for simple applications requiring only switching functionality; the 8-pin mode additionally provides delay / logic control signal input terminals and status signal output terminals, enabling complex control.

[0014] 3. On-site visual settings and convenient maintenance: The upper board integrates an OLED screen and buttons, which can view and modify the delay time, working mode and fault information, eliminating the need for an external programmer or computer and greatly shortening the debugging and maintenance time.

[0015] In addition to the objectives, features and advantages described above, this utility model has other objectives, features and advantages.

[0016] The present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an 8-pin relay structure.

[0018] Figure 2 This is a schematic diagram of a 5-pin relay structure.

[0019] Figure 1-2 In the middle section: 1. Upper plate; 2. Lower plate; 3. Connecting plate; 4. Pins; 5. Relay body; 6. Power processing unit; 7. Display element; 8. Operation buttons. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0022] This utility model provides a digital display relay.

[0023] In this embodiment, refer to Figure 1-2 The digital display relay includes: The base includes an upper plate 1, a lower plate 2 and a connecting plate 3. The upper plate 1 and the lower plate 2 are arranged in parallel. The two ends of the connecting plate are perpendicularly connected to the upper plate and the lower plate, respectively. The lower plate is provided with N pins 4, where N is equal to 5 or 8. The relay body 5 is detachably connected between the upper and lower plates; A delay / logic control unit, integrated within the relay body, is used to receive external delay or logic control signals; The power processing unit 6 is disposed on the connection board and is used to convert the safe voltage of the pin input not exceeding 36V into the internal working voltage not exceeding 24V. The display element 7 and the operation button 8 are both located on the upper plate and are connected to the delay / logic control unit for setting the delay time or logic function on site. When N=5, the pins of the lower plate only include the power input terminal and a set of relay changeover contacts; When N=8, the pins of the lower plate include a power input terminal and a set of relay switching contacts, as well as a delay / logic control signal input terminal and a relay status signal output terminal.

[0024] In the above technical solution, the base consists of an upper plate, a lower plate, and a connecting plate, all injection molded from engineering plastics; the lower plate has 5 or 8 pins formed in one piece. The delay / logic control unit can be, for example, an 8-bit MCU (such as STM8L051F3), whose I / O ports are optically isolated and connected to the lower plate pins, relay coil driver, OLED screen, and buttons respectively. The power supply unit is an isolated step-down DC / DC module (such as...). The RECOMR1SX-0505 / H has an input of 5–36V and an output of 5V / 200mA, and is located on one side of the connection board, while the relay body is located on the other side of the connection board.

[0025] The base is compatible with both 5-pin and 8-pin wiring, allowing for assembly into a single housing and reducing inventory model requirements. It supports safe input voltages below 36V, meeting SELV requirements and minimizing the risk of electric shock. The relay body, power processing unit, delay / logic control unit, display element and operation buttons are all integrated into the base of a standard 5-pin or 8-pin intermediate relay, which has a high degree of integration, reduces size and significantly saves installation space.

[0026] The basic principle of this application is as follows: An external safe DC voltage enters the power processing unit directly through the lower board pins, is regulated to 5V, and then supplies power to the MCU, OLED, coil driver, etc. The MCU captures the external delay / logic signal (pin 6) through its internal timer, compares it with the user-defined value stored in the EEPROM, and drives the transistor or MOSFET to turn on the coil after the condition is met, thus completing the contact switching; at the same time, the MCU refreshes the current state to the OLED screen in real time.

[0027] Specifically, the connecting plate is positioned biased towards one end of the upper and lower plates.

[0028] In this embodiment, the connecting plate is offset to one side to provide a larger space for the relay body on one side, while providing a suitable small space for the power processing unit on one side.

[0029] Specifically, N=5, and the 5 pins are as follows: first power input pin, second power input pin, normally open contact pin, common contact pin, and normally closed contact pin.

[0030] When N=5, the five pins on the lower board use a 1×5 straight-through pin header, and the pin definitions are as follows: V+, V–, COM, NO, NC; where V+ and V– are 5–36V DC inputs, and COM, NO, and NC are relay changeover contacts.

[0031] The 5-pin mode is suitable for applications requiring only on / off control, with the simplest wiring, and is compatible with the pins of traditional 5-pin intermediate relays, allowing for direct replacement.

[0032] Specifically, N=8, and the 8 pins are as follows: first power input pin, second power input pin, normally open contact pin, common contact pin, normally closed contact pin, delay / logic control signal input pin, relay status signal output pin, and common reference pin.

[0033] In this embodiment, when N=8, the 8 pins on the lower board use a 2×4 pin header, with the pin definitions as follows: V+, V–, COM, NO, NC, LOG_IN, STATUS, GND. LOG_IN is an input isolated by an optocoupler, and STATUS uses an OC (open collector) output.

[0034] The 8-pin mode enables "input triggering + status readback," replacing a single I / O module in a traditional PLC. It can achieve simplified PLC functionality in certain environments, reducing costs and facilitating maintenance. Furthermore, the pin definitions are fully compatible with common 8-pin sockets, requiring no additional adapters.

[0035] Specifically, the delay / logic control unit includes an EEPROM for saving the delay time and logic parameters set by the operation buttons when the power is off.

[0036] In this embodiment, the MCU is connected to an external 24C02 type EEPROM with a capacity of 2 Kbit and connected via the I²C bus. Each time the user modifies the parameters by pressing the operation button, the MCU immediately executes the EEPROM write cycle. After the write is completed, the "E" mark in the upper right corner of the OLED lights up for 500 ms to indicate that the save was successful.

[0037] The power-down detection circuit (resistor voltage divider + NPN) monitors V+. When V+ is lower than 4V, it triggers an MCU interrupt and disables EEPROM writing in the interrupt service routine to ensure data integrity during power-down.

[0038] Specifically, the display element is an OLED screen, which is directly driven by the 36V safety voltage after internal step-down.

[0039] For example, the OLED screen uses a 0.96-inch 128×64 dot matrix SSD1306 controller, which is connected to the MCU via 4-wire SPI. The drive power is provided by the 5V main power supply after being regulated by an LDO (AMS1117-3.3). The MCU integrates a boost algorithm to reduce the 36V input to 5V via an isolated DC / DC converter, and then to 3.3V via the LDO. The OLED only requires 3.3V / 20mA, and the total power consumption of the device is <0.5W.

[0040] Attention all technical personnel: Although this utility model has been described according to the specific embodiments above, the concept of this utility model is not limited to this utility model. Any modification that utilizes the concept of this utility model will be included within the scope of protection of this patent right.

Claims

1. A digital display relay, characterized in that... include: A base, comprising an upper plate, a lower plate, and a connecting plate, wherein the upper plate and the lower plate are arranged in parallel, and the two ends of the connecting plate are perpendicularly connected to the upper plate and the lower plate respectively, and the lower plate is provided with N pins, where N is equal to 5 or 8; The relay body is detachably connected between the upper and lower plates; A delay / logic control unit, integrated within the relay body, is used to receive external delay or logic control signals; A power processing unit, disposed on the connection board, is used to convert a safe voltage of no more than 36V input to the pins into an internal operating voltage of no more than 24V. The display elements and operation buttons are all located on the upper panel and are connected to the delay / logic control unit for setting the delay time or logic function on site. When N=5, the pins of the lower plate only include the power input terminal and a set of relay changeover contacts; When N=8, the pins of the lower plate include a power input terminal and a set of relay switching contacts, as well as a delay / logic control signal input terminal and a relay status signal output terminal.

2. The digital display relay according to claim 1, characterized in that: The connecting plate is positioned biased towards one end of the upper and lower plates.

3. The digital display relay according to claim 1, characterized in that: Where N=5, the 5 pins are: first power input pin, second power input pin, normally open contact pin, common contact pin, and normally closed contact pin.

4. The digital display relay according to claim 1, characterized in that: Where N=8, the 8 pins are as follows: first power input pin, second power input pin, normally open contact pin, common contact pin, normally closed contact pin, delay / logic control signal input pin, relay status signal output pin, and common reference pin.

5. The digital display relay according to claim 1, characterized in that: The delay / logic control unit includes an EEPROM for saving the delay time and logic parameters set by the operation buttons when the power is off.

6. The digital display relay according to claim 1, characterized in that: The display element is an OLED screen, which is directly driven by the 36V safe voltage after internal step-down.

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