KR20230091314A - S-BUS/C-BUS Communication Converter For Fire Detection System - Google Patents

Abstract

The present invention relates to a communication converter which converts an S-BUS communication signal to a C-BUS communication signal or a C-BUS communication signal to an S-BUS communication signal. The communication converter comprises: a C-BUS_RXD module which receives a signal from a C-BUS communication system, converts the received signal, and transmits the converted signal to an S-BUS_TXD module; the S-BUS_TXD module which converts the signal received from the C-BUS_RXD module and transmits the converted signal to a power line communication module; an S-BUS_RXD module which receives the signal from the power line communication module, converts the received signal, and transmits the converted signal to a C-BUS_TXD module; the C-BUS_TXD module which transmits the signal transmitted from the S-BUS_RXD module to the C-BUS communication system; and the power line communication module which transmits the signal received from the S-BUS communication system to the S-BUS_RXD module, transmits the signal received from the S-BUS_TXD module to the S-BUS communication system, rectifies DC power from a data signal transmitted from the S-BUS communication system and uses the rectified data signal as an internal power source. Accordingly, communication is possible in two systems with different communication methods, such as a system that uses an S-BUS communication signal like a fire alarm/fire detector and a fire detector or commercial building lighting control and home automation system using a C-BUS communication signal.

Description

S-BUS/C-BUS communication converter for fire detection system {S-BUS/C-BUS Communication Converter For Fire Detection System}

The present invention relates to a communication converter for converting an S-BUS communication signal into a C-BUS communication signal or a C-BUS communication signal into an S-BUS communication signal. More specifically, communication is possible in two systems with different communication methods, such as systems using S-BUS communication signals such as fire alarms/fire detectors and fire detectors using C-BUS communication signals or commercial building lighting control and home automation systems. It is about S-BUS/C-BUS communication converter for fire detection system that enables

Although the present invention will be described for use in fire detection systems, the present invention is not limited to these specific fire detection systems or lighting control and home automation systems, but other devices using S-BUS communication signals or C-BUS communication signals or can be used in the system.

In a home automation system and a commercial building lighting control system, an information transmission method using C-BUS communication is used. C-BUS communication is a communication standard mainly used in Europe. It is used to control the internal lighting, electrical system, and security of commercial buildings through automatic or remote control. (RS-232 is similar to C-BUS communication.) .) It also interfaces with security, AV products and other electrical products in home automation systems.

Information transfer method using S-BUS communication is used to communicate with other objects that require networking such as industrial machines, computers, control ICs, and peripheral devices. (Similar to S-BUS communication, there are RS-422 and RS-485.)

In particular, in a fire detection system, a heat detection or smoke detection type fire detector is used to detect whether or not a fire has occurred, and a corresponding alarm signal is transmitted to a repeater or a signal for checking the state of a fire detector is sent from a central device of a fire detection system. In the case of sending to the receiving part of the fire detector and between the central device and the relay device of the fire detection system or between the relay device and the fire detector, the information transfer method using S-BUS communication is used.

Recently, as the need for an automation system of a building using a C-BUS system has increased, there is a problem that is not compatible with the S-BUS system, which is a communication method used by existing fire detection systems. Depending on the state of the fire detection system, it is necessary to change the lighting of the entire building or the state of the security system, such as turning on the exit guidance light and opening and closing the door to prevent the spread of fire. As a related matter, when a fire detection system of the S-BUS communication standard has already been installed, there is a need to communicate with the automation system of the entire building while maintaining the existing installed fire detection system.

However, since S-BUS communication uses -24 ~ +24V signal method and C-BUS communication uses 0 ~ +24V signal method, S-BUS communication signal is converted into C-BUS communication signal or Conversely, there is a need to provide an S-BUS/C-BUS communication converter for fire detection systems that converts signals.

Republic of Korea Patent Registration No. 10-2022995 (2019.09.19.)

The present invention was made to solve the problem of the prior art, which suffers from communication difficulties due to different communication protocols when communication between a C-BUS system and an S-BUS system is required. -It is to provide a S-BUS/C-BUS communication converter for a fire detection system that converts a BUS communication signal or a C-BUS communication signal into an S-BUS communication signal.

According to this need, an S-BUS/C-BUS communication converter for a fire detection system that converts an S-BUS communication signal into a C-BUS communication signal or vice versa to achieve the above purpose is as follows. make up

The S-BUS / C-BUS communication converter for the fire detection system to achieve the above is a C-BUS_RXD module that receives signals from the C-BUS communication system, converts the received signals, and transmits them to the S-BUS_TXD module, S-BUS_TXD module converts the signal received from the C-BUS_RXD module and transmits it to the power line communication module, and S-BUS_RXD receives the signal from the power line communication module, converts the received signal, and transmits it to the C-BUS_TXD module module, the C-BUS_TXD module that transmits the signal transmitted from the S-BUS_RXD module to the C-BUS communication system, and the C-BUS_TXD module that transmits the signal received from the S-BUS communication system to the S-BUS_RXD module and from the S-BUS_TXD module It includes a power line communication module that transmits the received signal to the S-BUS communication system and rectifies DC power from the data signal transmitted from the S-BUS communication system so that it can be used as an internal power supply.

The C-BUS_RXD module includes a C-BUS_RXD receiver for receiving signals from the C-BUS communication system, a C-BUS_RXD converter for converting the signal level received from the C-BUS_RXD receiver to stabilize, and the converted signal to the S-BUS_TXD module. The S-BUS_TXD module includes a C-BUS_TXD transmission unit that receives signals from the C-BUS_RXD module and S-BUS_TXD conversion that preprocesses and converts signals received from the S-BUS_TXD transmission unit. S-BUS_TXD transmitter for amplifying and transmitting the converted signal to the S-BUS communication system, and the S-BUS_RXD module includes an S-BUS_RXD receiver for receiving signals from the S-BUS _SYSTEM and pre-processing the received signals. It includes an S-BUS_RXD conversion unit that converts and an S-BUS_RXD transfer unit that transfers the converted signal to the C-BUS_TXD module, wherein the C-BUS_TXD module receives the signal from the S-BUS_RXD module, a C-BUS_TXD transfer unit, and a C-BUS_TXD transfer unit. It includes a C-BUS_TXD conversion unit that converts the signal received from the BUS_TXD transmission unit to stabilize it and a C-BUS_TXD transmission unit that transmits the converted signal to the C-BUS communication system. The S-BUS_TXD transmission unit and the C-BUS_RXD transmission unit , And it is characterized in that the C-BUS_TXD transmission unit and the S-BUS_RXD transmission unit are coupled to be electrically insulated to transmit signals.

In more detail, the C-BUS_RXD module receives the C-BUS_TXD signal from the C-BUS communication system, converts the signal, and transmits the signal to the isolated circuit inside the S-BUS/C-BUS communication converter for the fire detection system using a light emitting element. convey To this end, the C-BUS_RXD module includes a C-BUS_RXD receiver that receives a signal from the C-BUS communication system, a C-BUS_RXD converter that converts the received signal, and a C-BUS_RXD transmitter that delivers the converted signal to an insulated internal circuit. do. The C-BUS_RXD receiver receiving the C-BUS_TXD signal of the C-BUS_RXD module may include at least one photodiode. The C-BUS_RXD conversion unit receiving and converting the C-BUS_TXD signal from the C-BUS_RXD receiver may include at least one light receiving element (photodiode) to receive the signal from the C-BUS_RXD receiver. The C-BUS_RXD converter may include a stabilization circuit including at least one transistor and an XOR gate to restore and stabilize the received signal. The C-BUS_RXD transmission unit receiving the converted signal from the C-BUS_RXD conversion unit and transmitting the signal to the S-BUS TXD module may include a pair of light emitting elements (light emitting diodes) selected according to voltage.

The S-BUS_TXD module converts the signal received from the C-BUS_RXD module and transmits it to the S-BUS communication system. The S-BUS_TXD module includes an S-BUS_TXD transmission unit that receives signals from the C-BUS_RXD module, an S-BUS_TXD conversion unit that converts signals received from the S-BUS_TXD transmission unit, and transmits the converted signals to the S-BUS communication system. It includes an S-BUS_TXD transmission unit that The S-BUS_TXD transmission unit receiving the signal from the C-BUS_RXD module may include at least one pair of light receiving elements (phototransistors). The S-BUS_TXD conversion unit that converts the signal received from the S-BUS_TXD transmission unit may include at least one high-frequency rejection filter to pre-process the signal. The S-BUS_TXD transmission unit of the S-BUS_TXD module for transmitting the converted signal to the S-BUS communication system may include at least one amplifier. The amplifier may be a Darlington amplifier circuit in which two transistors are connected in series.

The S-BUS_RXD module is connected to the S-BUS communication system, receives and converts the S-BUS RXD signal, and transmits it to the C-BUS_TXD module. The S-BUS_RXD module includes an S-BUS_RXD receiver that receives signals from the S-BUS communication system, an S-BUS_RXD converter that converts the received signal, and an S-BUS_RXD transmitter that transfers the converted signal to the C-BUS_TXD transmitter. The S-BUS_RXD receiving unit receiving the signal from the S-BUS communication system of the S-BUS_RXD module may include at least one constant voltage zener diode for lowering the voltage level of the received signal. The S-BUS_RXD conversion unit for converting the received signal of the S-BUS_RXD module includes at least one amplifier circuit for removing noise of the received signal, and the amplifier circuit of the S-BUS_RXD conversion unit may include a BJT amplifier. there is. The S-BUS_RXD conversion unit for converting the signal received by the S-BUS_RXD module may include at least one transistor. The S-BUS_RXD transfer unit that transfers the signal of the S-BUS_RXD module to the C-BUS_TXD module may include at least one light emitting device (light emitting diode).

The C-BUS_TXD module is connected to the C-BUS communication system and transmits the signal received from the S-BUS_RXD module to the C-BUS communication system. The C-BUS_TXD module includes a C-BUS_TXD delivery unit that receives signals from the C-BUS_RXD module, a C-BUS_TXD conversion unit that converts signals received from the S-BUS_TXD module, and a C-BUS_TXD converter that delivers converted signals to the C-BUS communication system. -BUS_TXD includes the transmitter. The C-BUS_TXD transfer unit receiving the signal from the S-BUS_RXD module may include at least one light receiving element (photodiode). The C-BUS_TXD conversion unit that converts the signal received from the C-BUS_TXD transmission unit may include at least one transistor and an XOR gate. The C-BUS_TXD conversion unit may include at least one pair of light emitting elements (photodiodes) selectively operated according to voltage. The C-BUS_TXD transmitter for transmitting the converted signal to the C-BUS communication system may include at least one pair of light receiving elements (phototransistors). The C-BUS_TXD transmitter may include at least one pair of transistors for amplification.

The S-BUS/C-BUS communication converter for the fire detection system of the present invention may further include a C-BUS power module for supplying 5V power required by the internal circuit.

The S-BUS/C-BUS communication converter for the fire detection system of the present invention may further include a power line communication module capable of supplying power from a two-wire communication line input from the S-BUS communication system. The power line communication module may include at least one bridge rectifier circuit.

According to the S-BUS/C-BUS communication converter for the fire detection system of the present invention, when the fire detection system is installed, when communication between the S-BUS communication system and the C-BUS communication system is required, the S-BUS communication signal is converted to the C-BUS Since communication between two independent systems is possible by converting the signal into a communication signal or vice versa, the inconvenience of replacing the existing system is eliminated, thereby increasing user convenience.

1 is a block diagram schematically showing the configuration of an S-BUS/C-BUS communication converter for a fire detection system according to an embodiment of the present invention.
2 is a diagram showing a converted signal according to an embodiment of the present invention.
3 is a circuit diagram of a communication converter according to an embodiment of the present invention.

Hereinafter, a preferred embodiment will be described with reference to the accompanying drawings so that the present invention can be more specifically understood.

Since the present invention can make various changes and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. These terms are only used for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present invention. The terms and/or include any combination of a plurality of related recited items or any of a plurality of related recited items.

It is understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle. It should be. On the other hand, when an element is referred to as “directly connected” or “directly connected” to another element, it should be understood that no other element exists in the middle.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in more detail. In order to facilitate overall understanding in the description of the present invention, the same reference numerals are used for the same components in the drawings, and redundant descriptions of the same components are omitted.

1 is a block diagram schematically showing the configuration of an S-BUS/C-BUS communication converter for a fire detection system according to an embodiment of the present invention.

2 is a diagram showing a converted signal according to an embodiment of the present invention.

3 is a circuit diagram of a communication converter according to an embodiment of the present invention.

1 and 2, the S-BUS communication system uses S-BUS signal lines (S+, S-) having a voltage of -24V to +24V as a signal method. The S-BUS communication method is similar to the RS-485 method, but has a stronger voltage level, so it can be used as a power supply source for loads, and there is no degradation in communication quality even in connection methods with many branches. The signal received from the S-BUS communication system to the communication converter of the present invention is a differential signal method that outputs data with a voltage difference between S+ and S- signal lines (voltage difference between -24V and +24V). On the other hand, the signal method transmitted from the communication converter to the S-BUS communication system adopts the power line communication method of outputting data by lowering the voltage of about 2 to 7V to the S+ signal line voltage.

In contrast, the S-BUS communication method has signal lines for GND, TXD, and RXD, and uses a current loop method that outputs data at a signal level of 0V to 24V between GND and TXD signal lines or between GND and RXD signal lines. The C-BUS communication system is similar to the RS-232 communication method, but has a higher voltage level than the RS-232 method, enabling long-distance transmission, and using an external power source, there is no degradation in communication quality even in a connection method with many branches.

1 and 3, the communication converter of the present invention includes a C-BUS_RXD module 110 that receives and converts a C-BUS_RXD signal from a C-BUS communication system and transfers it to the S-BUS_TXD module 120, The S-BUS_TXD module 120 converts the signal received from the C-BUS_RXD module 110 into an S-BUS_TXD signal and transmits it to the power line communication module, and receives and converts the S-BUS_RXD signal from the power line communication module to C -S-BUS_RXD module 130 that transmits to the BUS_TXD module 140 and C-BUS_TXD module that converts the signal received from the S-BUS_RXD module 130 into a C-BUS_TXD signal and transmits it to the C-BUS communication system 140, transmits the signal received by the S-BUS communication system to the S-BUS_RXD module, transmits the signal received by the S-BUS_TXD module to the S-BUS communication system, and transmits from the S-BUS communication system It includes a power line communication module that rectifies the DC power from the data signal so that it can be used as an internal power source.

The C-BUS_RXD module 110 includes the C-BUS_RXD receiver 111 that receives the C-BUS_RXD signal from the C-BUS communication system and the C-BUS_RXD that converts the signal level received from the C-BUS_RXD receiver 111 to stabilize it. It includes a conversion unit 112 and a C-BUS_RXD transmission unit 113 that transfers the converted signal to the S-BUS_TXD module 120. The S-BUS_TXD module 120 pre-processes and converts the signals received from the S-BUS_TXD transmission unit 121 and the S-BUS_TXD transmission unit 121 that receive signals from the C-BUS_RXD module 110. It includes a BUS_TXD conversion unit 122 and an S-BUS_TXD transmission unit 123 that amplifies and transmits the converted signal to the power line communication module 150.

The S-BUS_RXD module 130 includes an S-BUS_RXD receiver 131 that receives the S-BUS_RXD signal from the power line communication module 150, an S-BUS_RXD converter 132 that pre-processes and converts the received signal, and converts the S-BUS_RXD signal. and an S-BUS_RXD transfer unit 133 that transfers the received signal to the C-BUS_TXD module 140.

The C-BUS_TXD module 140 converts the signal received from the C-BUS_TXD transmission unit 141 and the C-BUS_TXD transmission unit 141 to stabilize the C-BUS_TXD signal received from the S-BUS_RXD module 130. It includes a conversion unit 142 and a C-BUS_TXD transmission unit 111 for transmitting the converted signal to the C-BUS communication system as a C-BUS_TXD signal.

Meanwhile, the S-BUS_TXD transmission unit 121 and the C-BUS_RXD transmission unit 113, and the C-BUS_TXD transmission unit 141 and the S-BUS_RXD transmission unit 133 are electrically insulated and coupled to transmit signals.

The C-BUS_RXD module 110 receives the C-BUS_TXD signal from the C-BUS communication system and converts the signal, and is an electrically separated circuit inside the S-BUS/C-BUS communication converter for the fire detection system using a light emitting element. Sends a signal to the S-BUS_TXD module 120.

The C-BUS_RXD receiver 111 of the C-BUS_RXD module 110 receives the C-BUS_TXD signal transmitted at a voltage of 0V to 24V from the C-BUS communication system and transmits the received C-BUS_TXD signal to a PC (photocoupler) It is received using the light emitting element of 4 and transferred to the C-BUS_RXD conversion unit 112, which is an internal circuit with a different driving voltage. The S-BUS/C-BUS communication converter for the fire detection system can be stabilized from electrical changes in the C-BUS and S-BUS communication systems by electrically separating the internal circuits using a photo coupler. In addition, by using a photocoupler, the voltage level is converted from the C-BUS communication system, which is a circuit based on a 24V operating power source, to an internal circuit based on a 5V operating power source, thereby stabilizing and enabling electrical separation. The light emitting device used the most common photocoupler LED, but those skilled in the art can change it to any device that transmits electrical signals between insulated circuits.

The C-BUS_RXD converter 112 receives the signal received from the C-BUS_RXD receiver 111. The C-BUS_RXD conversion unit 112 may include at least one light receiving element to receive a signal from the receiving unit. In this circuit, the photodiode of a PC (photocoupler) 4 was used as the light-receiving element, but those skilled in the art can change it to any element that receives signals so that the circuits are electrically separated. In addition, the C-BUS_RXD converter 112 includes a stabilization circuit for stabilizing the received signal into '0' and '1' data signals. The received signal transmitted to the light receiving element passes through a stabilization circuit including at least one transistor and an XOR gate.

A signal that has passed through a stabilization circuit can drive an operating status LED that checks whether a signal exists. The C-BUS_RXD transmission unit 113, which receives the signal converted from the C-BUS_RXD conversion unit 112 and transmits the signal to the S-BUS_TXD module 120, transmits a pair of light emitting elements (LEDs) selected according to the voltage. drive More specifically, the signal passing through the stabilization circuit selectively drives the light emitting diodes of the PC (photocoupler) 5 and PC (photocoupler) 6 of the C-BUS_RXD transfer unit 113 according to the 5V or 0V voltage. The PC (photocoupler) 5 and PC (photocoupler) 6 of the C-BUS_RXD transfer unit 113 deliver the stabilized and converted signals to the internal S-BUS_TXD module 120 connected to the S-BUS communication system. In the embodiment of the present invention, photocouplers PC5 and PC6 were used, but those skilled in the art can replace them with any device that transmits electrical signals between insulated circuits.

The signal passing through the S-BUS_TXD receiver 121 is transferred to the S-BUS_TXD conversion unit 122 and passes through the high-frequency rejection filter of the S-BUS_TXD conversion unit 122. Through this process, AC components that may be included in the signal can be removed. A signal that has passed through the high frequency rejection filter may pass through a constant voltage circuit for stabilizing a voltage level. In the embodiment of the present invention, the circuit of the S-BUS_TXD conversion unit 122 is composed of a high frequency rejection filter and a constant voltage circuit, but those skilled in the art can replace it with any element or circuit that selectively removes high frequencies in order to stabilize the voltage of the signal. possible. The signal converted through the S-BUS_TXD conversion unit 122 and having a stable voltage level is transmitted to the S-BUS_TXD line through the S-BUS_TXD transmission unit 123. The S-BUS_TXD transmitter 123 passes the signal through a circuit that simultaneously increases the degree of current amplification while switching, such as a Darlington amplification circuit, and transmits the signal to the power line communication module 150 by loading it on the S-BUS_TXD line. The reason for increasing the current amplification is that it is necessary to increase the output due to the nature of the S-BUS communication system that outputs data by lowering the voltage of about 2 to 7V to the S+ signal line voltage. In this embodiment, a Darlington amplification circuit is added to increase signal switching and current amplification, but those skilled in the art will be able to replace it with other elements and circuits having the same or similar functions as needed.

2 and 3, the signal carried on the S-BUS_TXD line reduces the voltage of the S-BUS signal line (S+) having a voltage of +24V in FIG. 2 to about 2 to 7V in the power line communication module 150. is lowered to output data.

The power line communication module transmits signals received from the S-BUS communication system to the S-BUS_RXD module, transmits signals received from the S-BUS_TXD module to the S-BUS communication system, and transmits data transmitted from the S-BUS communication system. A bridge rectifier circuit may be included to rectify the DC power from the signal and use it as internal power for the S-BUS_RXD module 130 and the S-BUS_TXD module 120.

The power line communication module 150 extracts the S-BUS_RXD signal from the signal lines (S+, S-) of the S-BUS communication system and transfers it to the S-BUS_RXD module 130. The S-BUS_RXD receiver 131 of the S-BUS_RXD module 130 receives the S-BUS_RXD signal received by the power line communication module 150 from the S-BUS communication system. The S-BUS_RXD receiving unit 131 passes the received S-BUS_RXD signal through a constant voltage circuit including a zener diode to stabilize the voltage level of the corresponding signal. The signal whose voltage level is stabilized through the S-BUS_RXD receiver 131 is transferred to the S-BUS_RXD converter 132. The S-BUS_RXD conversion unit 132 may include a BJT amplifier and a LOW NOISE AMPLIFIER transistor to remove received noise. The BJT amplifier and the transistor are used for filtering out noise and specific frequencies, and the corresponding signal passes through them to obtain a desired frequency and voltage level.

The signal passing through the S-BUS_RXD conversion unit 132 is transferred to the C-BUS_TXD module 140 via the S-BUS_RXD transmission unit 133. In more detail, the S-BUS_RXD transmission unit 133 is the C-BUS_TXD transmission unit 141 of the C-BUS_TXD module 140, which is another insulated internal circuit, so that the S-BUS_RXD signal is electrically separated using a photocoupler. ) is forwarded to This is to use a method similar to the signal transmission system of the C-BUS_RXD module and the S-BUS_TXD module.

The S-BUS/C-BUS communication converter for the fire detection system through photocoupler coupling can insulate the internal circuit to stabilize from the electrical changes of S-BUS-SYTEM and S-BUS-SYTEM respectively.

Referring to FIG. 3 in more detail, the S-BUS_RXD transmission unit 133 is a C-BUS_TXD transmission unit 141 that is electrically separated using a PC (photocoupler) 1, and the frequency and voltage levels are stably converted signals. convey In this embodiment, a light emitting element of PC (photo coupler) 1 was used. The most common light emitting diode is used as a light emitting device for transmitting signals between insulated circuits, but those skilled in the art can change it to any device that transmits electrical signals between insulated circuits.

The C-BUS_TXD module 140 receives the converted S-BUS_RXD signal from the S-BUS_RXD transmission unit 133. In more detail, referring to FIG. 3, the C-BUS_TXD transmission unit 141 receives a signal from the S-BUS_RXD transmission unit 133 using a PC (photocoupler) 1. To receive the signal, the C-BUS_TXD transmission unit 141 may include at least one light receiving element. In this circuit, a photodiode was used as the light-receiving element, but those skilled in the art can change it to any element that receives electrical signals between insulated circuits.

The signal transferred from the S-BUS_RXD module 130 passes through the C-BUS_TXD transmission unit 141 and moves to the C-BUS_RXD conversion unit 142. The C-BUS_RXD conversion unit 142 includes a stabilization circuit. More specifically, the S-BUS_RXD signal received from the C-BUS_TXD transfer unit 141 passes through a stabilization circuit including at least one transistor and an XOR gate. A signal that has passed through the stabilization circuit can drive an operation LED that checks whether a signal exists. In addition, the C-BUS_TXD conversion unit 142 includes a light emitting element for transmitting a signal to the C-BUS_TXD transmission unit 143. To transfer the signal, the C-BUS_TXD conversion unit 142 drives the light emitting diodes of PC (photocoupler) 2 and PC (photocoupler) 3 selected according to the 5V or 0V voltage. To this end, a photocoupler was used in this embodiment, but those skilled in the art can replace it with any device that transmits an electrical signal between insulated circuits.

Meanwhile, the C-BUS_TXD transmission unit 143 receives a signal from the C-BUS_TXD transmission unit 142 using at least one pair of light receiving elements. More specifically, phototransistors, which are light receiving elements of PC (photocoupler) 2 and PC (photocoupler) 3 in the circuit diagram of FIG. 3, can be used. To this end, this circuit uses a phototransistor, but those skilled in the art can replace it with any element that receives electrical signals between insulated circuits. The signal passing through the PC (photocoupler) 2 and PC (photocoupler) 3 is transferred to the C-BUS_TXD transmitter 143. The C-BUS_TXD transmitter 143 amplifies the voltage of the received signal using a PUSH-PULL amplifier circuit and transmits the amplified signal to the C-BUS_RXD line to the C-BUS communication system.

Referring to FIG. 3, the S-BUS/C-BUS communication converter for the present fire detection system may further include a C-BUS power supply unit 160. The C-BUS power supply unit 160 receives 24V power from the C-BUS communication system and lowers it to the required internal voltage level so that it can be used in the C-BUS_RXD module 110 and C-BUS_TXD module 140 of the communication converter of the present invention. do.

Meanwhile, the power line communication module 150 rectifies DC power from signals (S+, S-) received through the S-BUS communication system to be used as internal power for the S-BUS_RXD module 130 and the S-BUS_TXD module 120. supply by lowering it to the required internal voltage level.

According to the S-BUS / C-BUS communication converter for the fire detection system of the present invention as described above, when installing the fire detection system, if communication between the S-BUS communication system and the C-BUS communication system is required, the S-BUS communication signal is used. Since communication between two independent systems is possible by converting the signal into a C-BUS communication signal or vice versa, there is an advantage of increasing user convenience by eliminating the hassle of replacing the existing system.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is only exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

100: S-BUS/C-BUS communication converter for fire detection system
110: C-BUS_RXD module 111: C-BUS_RXD receiver
112: 111: C-BUS_RXD conversion unit 113: C-BUS_RXD transmission unit
120: S-BUS_TXD module 121: S-BUS_TXD transmission unit
122: S-BUS_TXD conversion unit 123: S-BUS_TXD transmission unit
130: S-BUS_RXD module 131: S-BUS_RXD receiver
132: S-BUS_RXD conversion unit 133: S-BUS_RXD transmission unit
140: C-BUS_TXD module 141: C-BUS_TXD transmission unit
142: C-BUS_TXD conversion unit 143: C-BUS_TXD transmission unit
150: Power line communication module of S-BUS/C-BUS communication converter for fire detection system
160: C-BUS power module of S-BUS/C-BUS communication converter for fire detection system

Claims (6)

In the S-BUS / C-BUS communication converter for fire detection system,
The communication converter is a C-BUS_RXD module that receives signals from the C-BUS communication system, converts the received signals, and transmits them to the S-BUS_TXD module;
An S-BUS_TXD module that converts the signal received from the C-BUS_RXD module and transmits it to the power line communication module;
An S-BUS_RXD module that receives signals from the power line communication module, converts the received signals, and transmits them to the C-BUS_TXD module;
A C-BUS_TXD module for transmitting the signal transmitted from the S-BUS_RXD module to a C-BUS communication system;
A power line communication module for transmitting the signal received through the S-BUS communication system to the S-BUS_RXD module and transmitting the signal received from the S-BUS_TXD module to the S-BUS communication system;
The C-BUS_RXD module includes a C-BUS_RXD receiver for receiving the C-BUS_RXD signal from the C-BUS communication system, a C-BUS_RXD converter for converting the signal level received from the C-BUS_RXD receiver to stabilize, and converting the converted signal to the S-BUS_RXD receiver. Includes a C-BUS_RXD delivery unit that delivers to the BUS_TXD module;
The S-BUS_TXD module includes an S-BUS_TXD transmission unit that receives signals from the C-BUS_RXD module, an S-BUS_TXD conversion unit that pre-processes and converts signals received from the S-BUS_TXD transmission unit, and amplifies the converted signals to power lines. It includes an S-BUS_TXD transmission unit that transmits to the communication module,
The S-BUS_RXD module includes an S-BUS_RXD receiver for receiving the S-BUS_RXD signal from the power line communication module, an S-BUS_RXD conversion unit for preprocessing and converting the received signal, and an S-BUS_TXD module for transmitting the converted signal to the C-BUS_TXD module. -Including the BUS_RXD delivery unit,
The C-BUS_TXD module includes a C-BUS_TXD transmission unit that receives signals from the S-BUS_RXD module, a C-BUS_TXD conversion unit that stabilizes and converts signals received from the C-BUS_TXD transmission unit, and converts the converted signals into the C-BUS communication system. Including a C-BUS_TXD transmitter for transmitting to,
The power line communication module rectifies the signal transmitted from the S-BUS communication system line into DC power so that it can be used as an internal power source,
The S-BUS_TXD transmission unit and the C-BUS_RXD transmission unit, and the C-BUS_TXD transmission unit and the S-BUS_RXD transmission unit are coupled to be electrically insulated to transmit signals.
S-BUS/C-BUS communication converter for fire detection system.
According to claim 1,
The C-BUS_RXD receiving unit and the C-BUS_RXD conversion unit are coupled to be electrically insulated using a photocoupler,
Characterized in that the C-BUS_RXD conversion unit for converting the signal received from the C-BUS_RXD receiver to stabilize includes a stabilization circuit including at least one XOR gate
S-BUS/C-BUS communication converter for fire detection system.
According to claim 1,
The S-BUS_TXD conversion unit for preprocessing and converting the signal received from the S-BUS_TXD transmission unit preprocesses the received signal using a high frequency rejection filter,
The S-BUS_TXD transmitter for transmitting the converted signal to the S-BUS communication system comprises at least one amplifier circuit for amplifying the signal to be transmitted.
S-BUS/C-BUS communication converter for fire detection system.
According to claim 3,
The S-BUS_TXD transfer unit and the C-BUS_RXD transfer unit, and the C-BUS_TXD transfer unit and the S-BUS_RXD transfer unit are electrically insulated to transmit signals by using a pair of photocouplers.
S-BUS/C-BUS communication converter for fire detection system.
According to claim 3,
S-BUS / C-BUS communication converter for fire detection system, characterized in that the amplifier circuit of the S-BUS_RXD transmission unit is a Darlington amplifier circuit.
According to claim 1,
The S-BUS_RXD conversion unit includes at least one amplifier circuit for removing noise of the received signal, characterized in that the amplifier circuit of the S-BUS_RXD conversion unit is a BJT amplifier,
S-BUS/C-BUS communication converter for fire detection system.

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