JPH0116235Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an output signal circuit that can output a plurality of types of output signals to the outside of a device depending on the operating status of the device.

[Prior Art] For example, in the case of a gas leak alarm, when a gas leak is detected, only a buzzer or the like built into the device notifies the user of the gas leak. However, if you are not home, the buzzer sound cannot be heard outside, which could lead to a major accident such as a gas explosion. Therefore, in addition to using the built-in buzzer in the equipment to notify you of a gas leak, you should also send an alarm signal to the outside (outside the room). It became necessary to centrally monitor the situation in a control room.

[Problems that the invention aims to solve] Conventional gas leak alarms only have an output signal circuit to sound a built-in buzzer when an abnormality such as a gas leak is detected. A signal circuit must be provided, and if the signal voltage for the central monitoring board is different from the signal voltage for the buzzer, the number of terminals in the output signal circuit is large, which increases costs and requires a large terminal space. He had the runner-up spot.

Therefore, the purpose of this invention is to be able to simultaneously obtain and switch multiple types of outputs, including at least one contact output and at least one voltage output, with a small number of terminals, so that the output can be used for as many purposes as possible. The purpose is to provide a signal circuit.

[Means for Solving the Problems] In order to achieve the above object, the present invention connects one fixed contact terminal of a changeover switch that is switched according to the operation of the device to the first output terminal, and changes the voltage value. Two different DC power supplies are connected in series with opposite polarity, a diode is connected in series with the DC power supply with the lower voltage value in forward polarity, and one end of this series circuit is connected to the movable contact of the changeover switch. terminal and the second output terminal, and connect one end of the DC power supply on the side with the higher voltage value to the other fixed contact terminal of the changeover switch, and connect the DC power supply on the side with the lower voltage value with A connection point with the DC power source on the high side is connected to a third output terminal, a contact signal is output from the first output terminal and the second output terminal, and the contact signal is output from the first output terminal and the third output terminal. Voltage signals having different voltage values are output between the terminal and between the second output terminal and the third output terminal.

[Function] In the signal output circuit of the present invention, an on/off contact signal is obtained from the first and second output terminals according to the operation of the changeover switch, and a contact signal of on/off is obtained from between the first and third output terminals. A voltage signal of the voltage value of the DC power supply on the low side is obtained according to the operation of the changeover switch, and a voltage signal of the voltage value of the DC power supply on the low side and the high side is obtained from between the second and third output terminals according to the operation of the changeover switch. A voltage signal with a voltage value of is obtained.

[Example] Next, the present invention will be explained with reference to the drawings.

The drawing shows an embodiment of the output signal circuit of the present invention built into a device, which includes a DC power supply V ₁ connected as shown in the diagram, and a DC power supply V having a lower voltage value than this DC power supply. ₂ , diode D,
A single-pole double-throw switch W as a switching means that is switched according to the operation of the device, a first output terminal T ₁ as a contact signal terminal, and a second output terminal as a voltage signal terminal.
has an output terminal T ₂ and a third output terminal T ₃ .
It goes without saying that the diode D may be connected to the negative electrode side of the DC power supply _V2 .

If the switch SW is the output contact for the alarm signal,
An open output is obtained between output terminals T ₁ and T ₂ when the switch SW is not operating, and a short circuit output is obtained when the switch SW is operating, that is, a normally open contact output is obtained as a whole.
From output terminals T ₂ and T ₃ , when the switch SW is not operating, DC output is from the DC power supply V ₁ with the higher voltage value, and when the switch SW is operating, the DC output is from the DC power supply V ₂ with the lower voltage value, the output terminal T ₁ and
From T ₃ , it is an open output when the switch SW is not operating, and a DC power supply with a lower voltage value when the switch SW is operating.
DC output due to V ₂ is obtained.

If the configuration is such that the output voltage between the output terminals T ₂ and T ₃ is guided to a centralized monitoring panel, the operating status of the equipment can be determined by detecting changes in voltage on the centralized monitoring panel side, and the operating status can be displayed. You can do something like this.
If the configuration is such that the output terminals T ₁ and T ₂ are connected to the central monitoring board, the output terminals on the central monitoring board side
By applying a voltage between T ₁ and T ₂ , a current flows due to the operation of the switch SW, and by detecting this current, the operating state of the device can be determined and the operation displayed. In addition, if the output terminals T ₁ and T ₃ are configured to be connected to a central monitoring board, the operation of the equipment can be controlled by detecting the voltage of the DC power supply V ₂ by operating the switch SW on the central monitoring board side. It is sufficient to determine the state and display the operation. As described above, the signal output circuit according to the present invention can obtain a plurality of types of signal outputs by selecting the output terminals.

As the DC power supplies V ₁ and V ₂ , various types such as rectified power supplies, batteries, and batteries can be used.

Note that although the drawings show a case where positive DC power supplies V ₁ and V ₂ are used, the polarities of these DC power supplies may be reversed, and in that case, the polarity of the connection of the diode D is reversed.

The output signal circuit according to the present invention has a wide range of applications, including not only the output circuit of the above-mentioned alarm circuit, but also remote control devices, operation confirmation circuits, etc.

[Effect] According to the present invention described above, one fixed contact terminal of a changeover switch that is switched according to the operation of the equipment is connected to the first output terminal, and two DC power supplies with different voltage values are mutually connected. A diode is connected in series so as to have a reverse polarity relationship, and a diode is connected in series with a forward polarity relationship to a DC power source with a lower voltage value, and one end of this series circuit is connected to the movable contact terminal of the changeover switch and the second output terminal. Connect one end of the DC power supply on the high voltage side to the other fixed contact terminal of the changeover switch, and connect the connection point between the DC power supply on the low voltage side and the DC power supply on the high voltage side to the second terminal. 3, outputs a contact signal from the first output terminal and the second output terminal, and connects the contact signal between the first output terminal and the third output terminal and between the second output terminal and the second output terminal. Since it is configured to output voltage signals with different voltage values from between the third output terminal and the third output terminal, multiple types of output can be obtained simultaneously depending on the operating status of the device.
Moreover, it is possible to switch at the same time, and by selecting the output according to the application, it is possible to provide a highly versatile output signal circuit.

[Brief explanation of the drawing]

The drawing is a circuit diagram showing an embodiment of the present invention. V ₁ , V ₂ : DC power supply, D: Diode, SW:
Single pole double throw switch, T ₁ : 1st output terminal, T ₂ :
Second output terminal, _T3 : third output terminal.

Claims (1)

[Scope of utility model registration request] One fixed contact terminal of a changeover switch that changes according to the operation of the equipment is connected to the first output terminal, and two DC power supplies with different voltage values are connected in series so that they have opposite polarity to each other. A diode is connected in series in a forward polarity relationship to the DC power supply on the lower side of the voltage value, and one end of this series circuit is connected to the movable contact terminal and the second output terminal of the changeover switch, and one end of the DC power supply on the higher side of the voltage value is connected to the movable contact terminal and the second output terminal of the changeover switch. is connected to the other fixed contact terminal of the changeover switch, the connection point between the DC power source with the lower voltage value and the DC power source with the higher voltage value is connected to the third output terminal, and the first output A contact signal is output from the terminal and a second output terminal, and different voltage values are generated between the first output terminal and the third output terminal and between the second output terminal and the third output terminal. An output signal circuit characterized in that it outputs a voltage signal.