Fire-fighting four-wire system communication and two-wire system communication compatible circuit

Abstract

The utility model discloses a fire-fighting four-wire system communication and two-wire system communication compatible circuit, which comprises a power supply communication unit, a first rectifier bridge unit, a second rectifier bridge unit, a master control load unit, an optocoupler unit, a communication unit and a compatible unit, the power supply communication unit is connected with the first rectifier bridge unit and the second rectifier bridge unit, the first rectifier bridge unit and the second rectifier bridge unit are respectively connected with the master control load unit and the communication unit, the master control load unit is connected with the communication unit, and the optical coupler unit is connected with the second rectifier bridge unit and the master control load unit. And the compatible circuit is connected with the master control load unit, the optocoupler unit and the second rectifier bridge unit. The four-wire long-distance communication device has the advantages that four-wire long-distance communication is achieved, compatibility of a four-wire system and a two-wire system is achieved by modifying loop ground connection and diode connection, and the four-wire long-distance communication device can be suitable for requirements in different environments.

Description

Technical Field

[0001] The utility model relates to the technical field of fire evacuation, in particular to a fire four-wire communication and two-wire communication compatible circuit. Background Art

[0002] Traditional fire emergency lighting uses a two-wire communication system, which provides both power and communication. However, this system is only suitable for commercial and residential areas, where the communication distance requirement is relatively low. However, for infrastructure projects such as subways, where transmission distances are longer, traditional two-wire communication cannot meet these requirements. Utility Model Content

[0003] The purpose of the utility model is to provide a fire protection four-wire communication and two-wire communication compatible circuit, thereby solving the above-mentioned problems existing in the prior art.

[0004] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0005] A fire protection four-wire communication and two-wire communication compatible circuit includes a power supply communication unit, a first rectifier bridge unit, a second rectifier bridge unit, a main control load unit, an optical coupling unit, a communication unit and a compatible unit; the power supply communication unit is connected to the first rectifier bridge unit and the second rectifier bridge unit, the first rectifier bridge unit and the second rectifier bridge unit are respectively connected to the main control load unit and the communication unit, the main control load unit is connected to the communication unit, and the optical coupling unit is connected to the second rectifier bridge unit and the main control load unit; the compatible circuit is connected to the main control load unit, the optical coupling unit and the second rectifier bridge unit.

[0006] Preferably, the power supply communication unit includes a power pin and a signal pin; the power pin and the signal pin are respectively connected to the first rectifier bridge unit and the second rectifier bridge unit; the power pin includes a power pin 1 and a power pin 2, and the signal pin includes a signal pin 3 and a signal pin 4.

[0007] Preferably, the first rectifier bridge unit includes a fuse F1, a transient suppression diode ZD1 and a rectifier bridge DB1;

[0008] The power pin 1 and the power pin 2 are respectively connected to the fuse F1 and the pin 2 of the rectifier bridge DB1; the fuse F1 is connected to the pin 1 of the rectifier bridge DB1; the pin 3 of the rectifier bridge DB1 is connected to the main control load unit; the pin 4 of the rectifier bridge DB1 is connected to GND; one end of the transient suppression diode ZD1 is connected between the fuse F1 and the pin 1 of the rectifier bridge DB1, and the other end is connected between the power pin 2 and the pin 2 of the rectifier bridge DB1.

[0009] Preferably, the second rectifier bridge unit includes a fuse F2, a transient suppression diode ZD2, a rectifier bridge DB2, a common-mode filter capacitor C1 and a common-mode filter capacitor C3;

[0010] The signal pin 3 and the signal pin 4 are respectively connected to the fuse F2 and the pin 2 of the rectifier bridge DB2; the fuse F2 is connected to the pin 1 of the rectifier bridge DB2; the pin 3 of the rectifier bridge DB2 is connected to the communication unit; the pin 4 of the rectifier bridge DB2 is connected to GND; one end of the transient suppression diode ZD2 is connected between the fuse F2 and the pin 1 of the rectifier bridge DB2, and the other end is connected between the signal pin 4 and the pin 2 of the rectifier bridge DB2; one end of the common-mode filter capacitor C1 is connected between the fuse F2 and the pin 1 of the rectifier bridge DB2, and the other end is connected to the common-mode filter capacitor C3, the other end of the common-mode filter capacitor C3 is connected between the fuse F2 and the pin 1 of the rectifier bridge DB2, and GNDS is connected between the common-mode filter capacitor C1 and the common-mode filter capacitor C3.

[0011] Preferably, the optocoupler unit includes an optocoupler U1, a current limiting resistor R2, a filter capacitor C2, a current limiting resistor R3 and a pull-down resistor R4; the optocoupler U1 includes an optocoupler pin, an optocoupler GNDS pin, an optocoupler line drop detection pin and an optocoupler 5V pin;

[0012] One end of the current limiting resistor R2 is connected between pin 3 of the rectifier bridge DB2 and the communication unit, and the other end is connected to the optocoupler pin; one end of the filter capacitor C2 is connected between the current limiting resistor R2 and the optocoupler pin, and the other end is connected to GNDS; the optocoupler GND pin is connected to GNDS; the optocoupler 5V pin is connected to the main control load unit; the optocoupler offline detection pin is connected to the current limiting resistor R3, and the current limiting resistor R3 is connected to the main control load unit; one end of the pull-down resistor R4 is connected between the optocoupler offline detection pin and the current limiting resistor R3, and the other end is connected to GND.

[0013] Preferably, the master load unit includes a master VOUT pin, a master GND pin, a master ACK pin, a master AK pin, a master 5V pin and a master offline detection pin;

[0014] The master VOUT pin is connected to pin 3 of the rectifier bridge DB1; the master GND pin is connected to GND; the master ACK pin and the master AK pin are connected to the communication unit; the master 5V pin is connected to the optocoupler 5V pin; the master offline detection pin is connected to the current limiting resistor R3.

[0015] Preferably, the communication unit includes a communication GND pin, a communication VOUT2 pin, a communication AK pin and a communication ACK pin;

[0016] The communication GND pin is connected to GND; the communication VOUT2 pin is connected to pin 3 of the rectifier bridge DB2; the communication AK pin and the communication ACK pin are connected to the main control AK pin and the main control ACK pin respectively.

[0017] Preferably, the compatible unit includes a diode D1 and a jumper resistor R1; the cathode of the diode D1 is connected between pin 3 of the rectifier bridge DB1 and the main control VOUT pin, and the anode of the diode D1 is connected between pin 3 of the rectifier bridge DB2 and the communication VOUT2 pin; one end of the jumper resistor R1 is connected to GND; the other end of the jumper resistor R1 is connected to GNDS.

[0018] The beneficial effects of the present invention are as follows: 1. The compatible circuit provided by the present invention is powered solely by the positive electrode of the communication unit (only the return ground is shared), and the design of using optocoupler isolation as the input signal drop pin detection makes the communication circuit largely immune to load fluctuations, thereby making the circuit communication more stable and reliable. The compatible circuit provided by the present invention not only realizes four-wire long-distance communication, but also realizes compatibility between the four-wire system and the two-wire system by modifying the connection of the loop ground and the connection of the diode, which can be applied to the needs of different environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a module connection diagram of the compatible circuit in the embodiment of the present utility model;

[0020] Figure 2 It is a principle structure diagram of the compatible circuit in the embodiment of the utility model. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] like Figure 1 As shown, in this embodiment, a fire-fighting four-wire communication and two-wire communication compatible circuit is provided, including a power supply communication unit, a first rectifier bridge unit, a second rectifier bridge unit, a main control load unit, an optocoupler unit, a communication unit and a compatible unit; the power supply communication unit is connected to the first rectifier bridge unit and the second rectifier bridge unit, the first rectifier bridge unit and the second rectifier bridge unit are respectively connected to the main control load unit and the communication unit, the main control load unit is connected to the communication unit, and the optocoupler unit is connected to the second rectifier bridge unit and the main control load unit; the compatible circuit is connected to the main control load unit, the optocoupler unit and the second rectifier bridge unit.

[0023] like Figure 2As shown, the specific composition of each component of the compatible circuit is as follows:

[0024] 1. Power supply and communication unit

[0025] In this embodiment, the power supply communication unit JP1 includes a power pin and a signal pin; the power pin and the signal pin are connected to the first rectifier bridge unit and the second rectifier bridge unit respectively; the power pin includes a power pin 1 and a power pin 2 ( Figure 2 The red and black in the figure are not positive or negative), and the signal pins include signal pin 3 and signal pin 4 ( Figure 2 The yellow-green in the image is not positive or negative).

[0026] 2. The first rectifier bridge unit

[0027] In this embodiment, the first rectifier bridge unit includes a fuse F1, a transient suppression diode ZD1 and a rectifier bridge DB1; the power pin 1 and the power pin 2 are respectively connected to the fuse F1 and the pin 2 of the rectifier bridge DB1; the fuse F1 is connected to the pin 1 of the rectifier bridge DB1; the pin 3 of the rectifier bridge DB1 is connected to the main control load unit; the pin 4 of the rectifier bridge DB1 is connected to GND; one end of the transient suppression diode ZD1 is connected between the fuse F1 and the pin 1 of the rectifier bridge DB1, and the other end is connected between the power pin 2 and the pin 2 of the rectifier bridge DB1.

[0028] 3. Second rectifier bridge unit

[0029] In this embodiment, the second rectifier bridge unit includes a fuse F2, a transient suppression diode ZD2, a rectifier bridge DB2, a common-mode filter capacitor C1 and a common-mode filter capacitor C3; the signal pin 3 and the signal pin 4 are respectively connected to the fuse F2 and pin 2 of the rectifier bridge DB2; the fuse F2 is connected to pin 1 of the rectifier bridge DB2; the pin 3 of the rectifier bridge DB2 is connected to the communication unit; the pin 4 of the rectifier bridge DB2 is connected to GND; one end of the transient suppression diode ZD2 is connected between the fuse F2 and pin 1 of the rectifier bridge DB2, and the other end is connected between the signal pin 4 and pin 2 of the rectifier bridge DB2; one end of the common-mode filter capacitor C1 is connected between the fuse F2 and pin 1 of the rectifier bridge DB2, and the other end is connected to the common-mode filter capacitor C3, the other end of the common-mode filter capacitor C3 is connected between the fuse F2 and pin 1 of the rectifier bridge DB2, and GNDS is connected between the common-mode filter capacitor C1 and the common-mode filter capacitor C3.

[0030] 4. Optocoupler unit

[0031] In this embodiment, the optocoupler unit includes an optocoupler U1, a current limiting resistor R2, a filter capacitor C2, a current limiting resistor R3 and a pull-down resistor R4; one end of the current limiting resistor R2 is connected between pin 3 of the rectifier bridge DB2 and the communication unit, and the other end is connected to pin 1 (optocoupler pin) of the optocoupler U1; one end of the filter capacitor C2 is connected between the current limiting resistor R2 and pin 1 of the optocoupler U1, and the other end is connected to GNDS; pin 2 (optocoupler GNDS pin) of the optocoupler U1 is connected to GNDS, pin 4 (optocoupler drop detection pin) of the optocoupler U1 is connected to the main control load unit, pin 3 (optocoupler 5V pin) of the optocoupler U1 is connected to the current limiting resistor R3, and the current limiting resistor R3 is connected to the main control load unit; one end of the pull-down resistor R4 is connected between pin 3 of the optocoupler U1 and the current limiting resistor R3, and the other end is connected to GND.

[0032] 5. Main control load unit

[0033] In this embodiment, the master load unit G1 includes a master VOUT pin, a master GND pin, a master ACK pin, a master AK pin, a master 5V pin and a master offline detection pin; the master VOUT pin is connected to pin 3 of the rectifier bridge DB1; the master GND pin is connected to GND; the master ACK pin and the master AK pin are connected to the communication unit; the master 5V pin is connected to pin 4 (optocoupler 5V pin) of the optocoupler U1; and the master offline detection pin is connected to the current limiting resistor R3.

[0034] 6. Communication unit

[0035] In this embodiment, the communication unit G2 includes a communication GND pin, a communication VOUT2 pin, a communication AK pin and a communication ACK pin; the communication GND pin is connected to GND; the communication VOUT2 pin is connected to pin 3 of the rectifier bridge DB2; the communication AK pin and the communication ACK pin are respectively connected to the main control AK pin and the main control ACK pin.

[0036] 7. Compatible Units

[0037] In this embodiment, the compatible unit includes a diode D1 and a jumper resistor R1; the cathode of the diode D1 is connected between pin 3 of the rectifier bridge DB1 and the main control VOUT pin, and the anode of the diode D1 is connected between pin 3 of the rectifier bridge DB2 and the communication VOUT2 pin; one end of the jumper resistor R1 is connected to GND, and the other end of the jumper resistor R1 is connected to GNDS.

[0038] In this embodiment, the working principle of the compatible circuit is as follows: 42V power supply and communication are input from JP1, where red and black are power pins and yellow and green are signal pins (red and black, yellow and green are not positive or negative). F1 and F2 are fuses that provide protection when the current is too large. ZD1 and ZD2 are transient suppression diodes that provide protection when the voltage is greater than 48V. DB1 is a rectifier bridge that provides working power to the main control load unit. The main control load unit is a module with communication, voltage reduction, and load control. At the same time, DB1 provides a return ground (GND) for the communication unit. C1 and C3 are common-mode filter capacitors that suppress noise. DB2 is a rectifier bridge that provides positive input voltage to the communication circuit and provides positive and negative input (GNDS) functions to the optocoupler U1. R2 is the optocoupler input current limiting resistor, and C2 is a filter capacitor. R4 is the optocoupler output pull-down resistor, and R3 is the signal input current limiting resistor of the main control load unit. When any line (yellow or green) of the optocoupler is disconnected. The optocoupler output pin 3 (DAT / BUS_V_AD) detects a low level, indicating that any of the input communication pins is disconnected. R1 and D1 are reserved for converting from a four-wire system to a two-wire system. When using a two-wire system, these two components must be soldered together. R1 provides a return ground for the circuit, connecting GND and GNDS to create a common ground. Soldering D1 provides a positive voltage supply channel. When using a two-wire system, soldering the red and black power wires does not require soldering; only the yellow and green power wires are required. To qualify for a four-wire system, the power and signal grounds of the external input pins of the communication circuit must be shared. If this is not the case, simply connect the two external grounds to use this circuit.

[0039] The compatible circuit uses a bridge rectifier circuit and optocoupler AD detection to achieve long-distance communication. When communication is disconnected, the lamp enters an emergency state. At the same time, by adding a diode and jumper resistor, the optocoupler's input and output pins are connected together to form a ground loop, thus achieving conversion to traditional two-wire control. When used as a traditional two-wire control system, only the communication wires need to be soldered, and the power wire does not need to be soldered.

[0040] By adopting the above technical solution disclosed in the utility model, the following beneficial effects are obtained:

[0041] This utility model provides a circuit compatible with fire protection four-wire communication and two-wire communication. The compatible circuit is powered by the positive pole of the communication unit (only the return ground is shared), and the design of using optical coupling isolation as the input signal drop pin detection makes the communication circuit largely unaffected by load fluctuations, thereby making the circuit communication more stable and reliable. The compatible circuit not only realizes four-wire long-distance communication, but also realizes compatibility between the four-wire system and the two-wire system by modifying the connection of the loop ground and the connection of the diode, which can be applied to the needs of different environments.

[0042] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A fire protection four-wire communication and two-wire communication compatible circuit, characterized by: It includes a power supply and communication unit, a first rectifier bridge unit, a second rectifier bridge unit, a main control load unit, an optical coupling unit, a communication unit and a compatible unit; the power supply and communication unit is connected to the first rectifier bridge unit and the second rectifier bridge unit, the first rectifier bridge unit and the second rectifier bridge unit are respectively connected to the main control load unit and the communication unit, the main control load unit is connected to the communication unit, and the optical coupling unit is connected to the second rectifier bridge unit and the main control load unit; the compatible circuit is connected to the main control load unit, the optical coupling unit and the second rectifier bridge unit.

2. The fire protection four-wire communication and two-wire communication compatible circuit according to claim 1, characterized in that: The power supply communication unit includes a power pin and a signal pin; the power pin and the signal pin are respectively connected to the first rectifier bridge unit and the second rectifier bridge unit; the power pin includes a power pin 1 and a power pin 2, and the signal pin includes a signal pin 3 and a signal pin 4.

3. The fire protection four-wire communication and two-wire communication compatible circuit according to claim 2, characterized in that: The first rectifier bridge unit includes a fuse F1, a transient suppression diode ZD1 and a rectifier bridge DB1; The power pin 1 and the power pin 2 are respectively connected to the fuse F1 and the pin 2 of the rectifier bridge DB1; the fuse F1 is connected to the pin 1 of the rectifier bridge DB1; the pin 3 of the rectifier bridge DB1 is connected to the main control load unit; the pin 4 of the rectifier bridge DB1 is connected to GND; one end of the transient suppression diode ZD1 is connected between the fuse F1 and the pin 1 of the rectifier bridge DB1, and the other end is connected between the power pin 2 and the pin 2 of the rectifier bridge DB1.

4. The fire protection four-wire communication and two-wire communication compatible circuit according to claim 3, characterized in that: The second rectifier bridge unit includes a fuse F2, a transient suppression diode ZD2, a rectifier bridge DB2, a common-mode filter capacitor C1 and a common-mode filter capacitor C3; The signal pin 3 and the signal pin 4 are respectively connected to the fuse F2 and the pin 2 of the rectifier bridge DB2; the fuse F2 is connected to the pin 1 of the rectifier bridge DB2; the pin 3 of the rectifier bridge DB2 is connected to the communication unit; the pin 4 of the rectifier bridge DB2 is connected to GND; one end of the transient suppression diode ZD2 is connected between the fuse F2 and the pin 1 of the rectifier bridge DB2, and the other end is connected between the signal pin 4 and the pin 2 of the rectifier bridge DB2; one end of the common-mode filter capacitor C1 is connected between the fuse F2 and the pin 1 of the rectifier bridge DB2, and the other end is connected to the common-mode filter capacitor C3, the other end of the common-mode filter capacitor C3 is connected between the fuse F2 and the pin 1 of the rectifier bridge DB2, and GNDS is connected between the common-mode filter capacitor C1 and the common-mode filter capacitor C3.

5. The fire protection four-wire communication and two-wire communication compatible circuit according to claim 4, characterized in that: The optocoupler unit includes an optocoupler U1, a current limiting resistor R2, a filter capacitor C2, a current limiting resistor R3, and a pull-down resistor R4; the optocoupler U1 includes an optocoupler pin, an optocoupler GNDS pin, an optocoupler line drop detection pin, and an optocoupler 5V pin; One end of the current limiting resistor R2 is connected between pin 3 of the rectifier bridge DB2 and the communication unit, and the other end is connected to the optocoupler pin; one end of the filter capacitor C2 is connected between the current limiting resistor R2 and the optocoupler pin, and the other end is connected to GNDS; the optocoupler GND pin is connected to GNDS; the optocoupler 5V pin is connected to the main control load unit; the optocoupler offline detection pin is connected to the current limiting resistor R3, and the current limiting resistor R3 is connected to the main control load unit; one end of the pull-down resistor R4 is connected between the optocoupler offline detection pin and the current limiting resistor R3, and the other end is connected to GND.

6. The fire protection four-wire communication and two-wire communication compatible circuit according to claim 5, characterized in that: The master load unit includes a master VOUT pin, a master GND pin, a master ACK pin, a master AK pin, a master 5V pin and a master offline detection pin; The master VOUT pin is connected to pin 3 of the rectifier bridge DB1; the master GND pin is connected to GND; the master ACK pin and the master AK pin are connected to the communication unit; the master 5V pin is connected to the optocoupler 5V pin; the master offline detection pin is connected to the current limiting resistor R3.

7. The fire protection four-wire communication and two-wire communication compatible circuit according to claim 6, characterized in that: The communication unit includes a communication GND pin, a communication VOUT2 pin, a communication AK pin and a communication ACK pin; The communication GND pin is connected to GND; the communication VOUT2 pin is connected to pin 3 of the rectifier bridge DB2; the communication AK pin and the communication ACK pin are connected to the main control AK pin and the main control ACK pin respectively.

8. The fire protection four-wire communication and two-wire communication compatible circuit according to claim 7, characterized in that: The compatible unit includes a diode D1 and a jumper resistor R1; the cathode of the diode D1 is connected between pin 3 of the rectifier bridge DB1 and the main control VOUT pin, and the anode of the diode D1 is connected between pin 3 of the rectifier bridge DB2 and the communication VOUT2 pin; one end of the jumper resistor R1 is connected to GND; the other end of the jumper resistor R1 is connected to GNDS.

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