JPH05233029A - Interface circuit for input/output signal - Google Patents

Abstract

PURPOSE:To constitute the interface circuit for input/output at low cost and to improve reliability by providing a diode bridge at the interfaces for input/ output signals in plural controllers and using both of input/output polarities. CONSTITUTION:A controller 1 of a DC relay input signal interface, controller 2 of an AC relay input signal interface, controller 4 of a photocoupler input signal interface, controller 5 of an LED input signal interface and controller 6 of a thyristor input signal interface are respectively connected through diode bridges 25-30 to a signal line 16. On the other hand, output signal interface controllers 8-11 for a relay contact, transistor, thyristor and photocoupler are respectively connected through diode bridges 31-34 to a signal line 17. Thus, both of the polarities of input/output signals can be used together.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an input / output signal interface circuit for controlling a plurality of control devices.

[0002]

2. Description of the Related Art FIGS. 3 and 4 are connection diagrams showing a conventional input / output signal interface circuit. In FIG.
Is a controller for DC relay input signal interface, 2
Is a control device for AC relay input signal interface, 3
Is a controller for the photocoupler input signal interface, 4
Is a controller of transistor input signal interface,
5 is a control device for the LED lamp lighting input signal interface, 6 is a control device for the thyristor input signal interface, 7 is a relay for transmitting the generation of the input signal to the control devices 1, 2, 3, 4, 5, and 6, and 20, 21, 2
Reference numerals 2, 23, and 24 are relay contacts that operate when the relay 7 is excited. 16 is relay contacts 19 and 2 for transmitting an input signal
0, 21, 22, 23, 24 and control devices 1, 2, 3,
It is a connecting line connecting 4, 5, and 6.

Next, in FIG. 4, 8 is a relay contact output signal interface control device, 9 is a transistor output signal interface control device, 10 is a thyristor output signal interface control device, 11 is a photocoupler output signal interface control device, 12, 13, 1
Reference numerals 4 and 15 are relays that receive the output signals of the control devices 8, 9, 10 and 11, and 17 is a signal line that connects the output signals of the control devices 8, 9, 10 and 11 and the relays 12, 13, 14 and 15. is there. Reference numeral 18 is a drive power source for driving the relays 12, 13, 14, 15. Further, 42, 43, 44, 45 are relay contacts of the relays 12, 13, 14, 15.

Next, the operation will be described. In FIG. 3, when the relay 7 is excited, the relay contact 19 which is an input signal source is operated, and the input signal is transmitted to the control device 1 of the DC relay input signal interface by the signal line 16, and at the same time, when the relay 7 is excited, another Relay contacts 20, 2
1, 22, 23, 24 also operate, and the input signal is transmitted by the signal line 16 to the control devices 2, 3, 4, 5, 6 having different input signal interfaces. In FIG. 4, the output signal of the control device 8 is transmitted to the relay 12 through the signal line 17, and the relay 12 is operated by the driving power supply 18. Similarly, control devices 9, 10 having different output interfaces,
The output signal of 11 is also transmitted to the relays 13, 14 and 15 and operated by the drive power supply 18. Therefore, the control devices 8, 9,
If there is an output signal from any one of 10 and 11, one of the relay contacts 42, 43, 44 and 45 that are logically connected is closed.

[0005]

Since the conventional input / output signal interface circuit is configured as described above,
As the number of control devices has increased, the number of signal lines has to be increased, and in addition, it has been necessary to increase the number of relays of input / output signals and the number of relay contacts.

The present invention has been made to solve the above problems, and an object thereof is to obtain an input / output signal interface circuit which can reduce the number of signal lines and the number of relays.

[0007]

An interface circuit for input / output signals according to the present invention comprises a diode bridge circuit as an input / output interface circuit of a control device.

[0008]

The interface means for input / output signals according to the present invention converts each signal into direct current and matches the polarities of the input / output signals.

[0009]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a controller for a DC relay input signal interface, 2 is a controller for an AC relay input signal interface, 3 is a controller for a photocoupler input signal interface, 4 is a controller for a transistor input signal interface, and 5 is an LED lamp. Input signal interface controller, 6 is a thyristor input signal interface controller, 7 is the controller 1, 2,
Relays that transmit the generation of input signals to 3, 4, 5, 6
Reference numeral 9 is a contact of the relay 7, 16 is a signal line for transmitting an input signal, and 25, 26, 27, 28, 29 and 30 are diode bridges for converting the input signal into a direct current and matching the polarities. 8 is a control device for the relay output signal interface,
Reference numeral 9 is a transistor output signal interface control device, 10 is a thyristor output signal interface control device, 11 is a photocoupler output signal interface control device, 12 is a relay for receiving the output signal, 17 is a signal line for transmitting the output signal, and 18 is Driving power sources for driving the relay 12, 31, 32, 33, 34 are diode bridges for converting output signals into direct currents and matching polarities. 41 is a contact of the relay 12.

Next, the operation will be described. In FIG. 1, a control device 1 for a DC relay input signal interface
The AC side of the diode bridge 25 is connected to
The DC side of the diode bridge is connected to the signal line 16. By the operation of the input signal relay contact 19 which is activated by the excitation of the input signal relay 7, the input signal is transmitted to the control device 1 and the input signal relay of the control device 1 operates. At the same time, the controller 2 of the AC relay input signal interface is also connected to the signal line 16 on the DC side via the AC side of the diode bridge 26. In addition, the diode bridges 27 and 2 are simultaneously applied to the control device 4 for the photocoupler input signal interface, the control device 5 for the LED input signal interface, and the control device 6 for the thyristor input signal interface.
It is connected to the signal line 16 via 8, 29 and 30. Therefore, by the operation of the relay contact 19 of the input signal, the control device 1,
Input signals are simultaneously transmitted to 2, 3, 4, 5, and 6 to operate.

On the other hand, in the controller 8 of the relay contact output signal interface, the DC side of the diode bridge 31 is
Since the AC side is connected to the signal line 17, the DC side of the diode bridge 31 is closed by the relay (output signal) operation of the controller 8 of the relay contact output signal interface, and the drive-like power supply 18 operates with the output signal.
2 is applied to the alternating current side of the diode bridge 31 to operate the relay 12. Similarly, the controller 9 of the transistor output signal interface is connected to the signal line 17 on the alternating current side via the direct current side of the diode bridge 32. Further, since the diode bridge 33 is connected to the control device 10 of the thyristor output signal interface and the control device 11 of the photocoupler output signal interface is also connected to the signal line 17 via the diode bridge 34, the control devices 8, 9, 10, 11 are connected. If there is an output signal from any of the above, the relay 12 is activated and the relay contact 41 is closed.

Example 2. In the above embodiment, the case where the driving power supply 18 is a DC power supply has been described, but the AC power supply 118 is used.
It is possible to change to the above, and an example thereof is shown in FIG.

[0013]

As described above, according to the present invention, since the diode bridges are provided in the interfaces of the input / output signals of the plurality of control devices and the polarities of the input / output signals are used together, the interface circuit of the input / output signals is used. It is possible to reduce the cost and improve the reliability.

[Brief description of drawings]

FIG. 1 is a connection diagram of an input / output signal interface circuit according to an embodiment of the present invention.

FIG. 2 is a connection diagram of an input / output signal interface circuit according to another embodiment of the present invention.

FIG. 3 is a connection diagram of a conventional input / output signal interface circuit.

FIG. 4 is a connection diagram of a conventional output signal interface circuit.

[Explanation of symbols]

1 DC relay input signal interface control device 2 AC relay input signal interface control device 3 Photocoupler input signal interface control device 4 Transistor input signal interface control device 5 LED input signal interface control device 6 Thyristor input signal interface control device Device 7 Relay 8 Control device for relay output signal interface 9 Control device for transistor output signal interface 10 Control device for thyristor output signal interface 11 Photo coupler output signal Interface control device 12 Relay 13 Relay 14 Relay 15 Relay 16 Signal line 17 Signal Line 18 Drive power supply (DC) 19 Relay contact (input signal source) 20 Relay contact 21 Relay contact 22 Relay contact 23 Relay contact 24 relay contact 25 diode bridge 26 diode bridge 27 diode bridge 28 diode bridge 29 diode bridge 30 diode bridge 31 diode bridge 32 diode bridge 33 diode bridge 34 diode bridge 41 relay contact 42 relay contact 44 relay contact 44 relay contact 44 relay contact Power supply (alternating current)

Claims (1)

[Claims] 1. An input / output signal interface circuit comprising a plurality of different input interfaces controlled by one input signal, and an output signal generated by a logical sum of a plurality of output signals having different output interfaces. , Each input signal interface is connected to the AC terminal of each diode bridge, and + and-of the DC terminals are commonly connected to each diode bridge and connected to the input signal source. On the other hand, to each output signal interface, connect the + and-of the DC terminals of different diode bridges by aligning them in the direction of the output current flow, and connect the AC terminals to each diode bridge in common and load one of them. Connect the other end to the driving power supply by connecting the other to each load and the driving power supply, and further connect one of the DC terminals of the diode bridge connected to the interface of the input signal and the AC terminal of the diode bridge connected to the output signal interface. An interface circuit for input / output signals, characterized in that one and the other are connected in common.