JP2002008748A - Terminal board with signal converting function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal board capable of reducing the board size, an installation space, and the number of wirings inside and outside the board. SOLUTION: This terminal board comprises a terminal board 2 having plural input terminals 2a-2h, a signal converting part for coding signals from the input terminals, and a terminal board 4 having plural output terminals 4a-4d, 4f for outputting the converted input signals.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal board with a signal conversion function of a control panel having a plurality of contact inputs from outside.

[0002]

2. Description of the Related Art FIG. 6 is a block diagram showing a conventional terminal block and a contact input signal circuit from an upper information transmission device to a supervisory control device when the conventional terminal block is applied. In the figure, reference numeral 20 denotes a conventional terminal block, which has an input terminal 21 and an output terminal 22 which are connected one-to-one. Reference numeral 30 denotes a monitoring and control device provided with the conventional terminal block 20, reference numeral 40 denotes a digital signal input circuit provided in the monitoring and control device 30,
It is connected to the output terminal 22 of the terminal block 20 on a one-to-one basis. 50
Denotes an information transmission device for the higher order, and 51 denotes a signal output contact point to the monitoring and control device 30 installed in the information transmission device for the higher order 50.

Next, the operation will be described. When one of the signal output contacts 51 installed in the information transmission device for higher order 50 is closed, a signal is output to the monitoring and control device 30. Next, the input terminal 21 of the terminal block 20 installed at the input portion of the monitoring and control device 30 receives this signal, and outputs a signal from the output terminal 22 to the inside of the panel of the monitoring and control device 30 through the connection inside the terminal block. Finally, one of the photocouplers of the digital signal input circuit 40 receiving this signal is turned on. In this configuration, the signal output contact 51 installed in the upper-level information transmission device 50 has a plurality of signal items, that is, the number of output contacts, since communication between the upper-level information transmission device 50 and the higher-level system is cyclic. Closed contacts up to 1
Individual.

[0004]

In the conventional terminal block, the input terminal and the output terminal are connected in a one-to-one manner. Even if the signal is such that only the contacts are closed, the same number of inputs of the digital input signal circuit as the number of signal output contacts must be prepared, which requires a large in-panel device and a large installation space. In addition, the same number of wirings in the panel as the number of signal output contacts are required, making wiring in the panel complicated.
There were problems such as a large number of wiring steps.

The present invention has been made to solve the above problems, and has as its object to obtain a terminal block capable of reducing the number of internal devices and installation spaces and the number of wires inside and outside the panel.

[0006]

A terminal block with a signal conversion function according to the present invention comprises a terminal block having a plurality of input terminals, a signal conversion section for coding a signal from the input terminal, and a converted input signal. And a terminal block having a plurality of output terminals for outputting a signal.

Further, an output terminal connected to a plurality of pairs of input terminals via diodes, respectively, and another output terminal commonly connected to one input terminal of each pair via another diode. It is provided.

An output terminal connected to a plurality of pairs of input terminals via diodes, another output terminal commonly connected to one input terminal of each pair via another diode, The other input terminal of each of the pairs has a further output terminal commonly connected via another diode.

Further, of the input terminal and the output terminal, a portion having one common output terminal and an input terminal connected to the common output terminal is divided into another portion, and a connection line of both portions is connected to a connector. Connectable.

In addition, the terminal block with a signal conversion function is installed at an output section of an information transmission apparatus for a higher order.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. In FIG.
Reference numeral 1 denotes a terminal block with a signal conversion function according to the present invention, and 2 denotes input terminals 2a to 2h for receiving contact input signals from outside the panel.
Is a diode connected in the forward direction to the input terminal of the terminal block 2, and one or two diodes are connected in parallel to one input terminal. To elaborate,
Each of the input terminals 2a to 2d has one diode 3a, 3
c, 3e, and 3g, and the input terminals 2e to 2h
Two diodes j and 3k, 3m and 3n, 3p and 3r, 3s and 3t are connected respectively.

Reference numeral 4 denotes an output terminal block, which includes four output terminals 4a to 4d connected to two input terminals in a pair via diodes, and one input terminal 2e to 2e of each pair.
h from diodes 3k, 3n, 3r, 3t
And an output terminal 4f that is commonly connected through the terminal. More specifically, the output terminal 4a is connected to the input terminals 2a and 2e.
The output terminal 4b is connected to the input terminals 2b and 2f,
c is the input terminal 2c and 2g, and the output terminal 4d is the input terminal 2c.
d and 2h, and the output terminal 4f is collectively
e to 2h.

Next, the operation will be described. In the terminal block 2,
When a signal is input to the input terminal 2a, the diode 3a
The signal is output from the output terminal 4a of the terminal block 4 through the terminal. When a signal is input to the input terminal 2e, a signal is output from the output terminal 4a of the terminal block 4 through the diode 3j and from the output terminal 4f of the terminal block 4 through the diode 3k. Similarly, when a signal is input to the input terminal of the terminal block 2, the output terminals 4 a to 4
Since a signal is output from any specific output terminal of f and is coded by a combination of the output signals at this time, the input signal can be specified. FIG. 2 shows a combination of input / output signals in this embodiment.

As described above, in the first embodiment, since the signal conversion section for encoding and outputting the input signal is provided inside the terminal block and the number of output terminals to the panel is reduced, the digital input connected to this is provided. A terminal block that can reduce the number of circuit inputs and the number of wirings in the panel, and reduce the number of devices in the panel, installation space, and the number of wirings in the panel can be realized.

Embodiment 2 In the first embodiment, if two contacts are simultaneously closed due to, for example, an abnormality of an external device that is outputting a signal, and two input signals are input to the input terminals 2a and 2e, for example, the output terminals On the side, the input terminal having received the contact input is determined as 2e.

The second embodiment is intended to prevent such a malfunction. As shown in FIG. 3, two diodes 3 and 3 are connected to all the input terminals 2a to 2h.
a and 3b, 3c and 3d, 3e and 3f, 3g and 3h, 3j
And 3k, 3m and 3n, 3p and 3r, and 3s and 3t.

On the other hand, the output terminals are connected to two pairs of input terminals 2a and 2e, 2b and 2f, 2c and 2g, 2d and 2h to diodes 3a and 3j, 3c and 3m, 3e and 3e, respectively.
Output terminals 4a to 4d connected via 3p, 3g and 3s, and one terminal commonly connected via another diode 3b, 3d, 3f, 3h to one input terminal 2a to 2d of each pair , And another diode 3k, respectively, at the other input terminal 2e to 2h of each pair.
And one output terminal 4f commonly connected through 3n, 3r, and 3t.

According to this configuration, when two or more inputs are simultaneously made to the input terminals, signals are always output from three or more output terminals, so that it is determined that there are three or more signal outputs. This makes it possible to detect an abnormality of the external device that is outputting a signal.

Embodiment 3 In the second embodiment, a plurality of terminal blocks of the same shape are installed when the terminal blocks are added. In each case, the output terminals 4a for collecting the signals to the input terminals arranged every four terminals are provided. To 4e are added.

In the third embodiment, as shown in FIG.
Basic terminal block 1 with 4 input terminals as one block
1 and an additional terminal block 12, and a connector 5
When the terminal block needs to be added, the connecting circuit for connecting the signals to the input terminals arranged at every fourth connector is connected in the form of a bus.
2 can be added by adding them.

As a result, the output terminals 4a to 4e for aggregating the signals to the input terminals arranged every four terminals are one set for all the terminal blocks, so that a further reduction effect can be obtained when the terminal blocks are added. it can.

Embodiment 4 In the first to third embodiments, the case where the terminal block with the signal conversion function is installed in the input unit of the signal input side device has been described. However, as shown in FIG. By installing at the output part of the information transmission device 50 for the higher order, the number of wires between the information transmission device 50 for the higher order and, for example, the monitoring control device 30 can be reduced, and the number of wiring steps between boards can be reduced. .

[0023]

As described above, according to the present invention, a signal converter for encoding and outputting an input signal is provided inside the terminal block, and the number of output terminals to the panel is reduced. It is possible to realize a terminal block capable of reducing the number of inputs of the input circuit and the number of wires in the panel, and reducing the number of devices in the panel, installation space, and the number of wires inside and outside the panel.

Further, by judging the number of signal outputs from the output terminals, it is possible to detect an abnormality in an external device that is outputting a signal.

Further, it is easy to add a terminal block, and it is possible to reduce the number of wirings in the panel, equipment in the panel, installation space, and the number of wirings in the panel.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a terminal block with a signal conversion function according to Embodiment 1 of the present invention.

FIG. 2 is a diagram illustrating an operation of the first embodiment.

FIG. 3 is a configuration diagram illustrating a terminal block with a signal conversion function according to a second embodiment of the present invention.

FIG. 4 is a configuration diagram showing a terminal block with a signal conversion function according to Embodiment 3 of the present invention.

FIG. 5 is a configuration diagram showing connections between devices according to Embodiment 4 of the present invention.

FIG. 6 is a configuration diagram showing a connection between a higher-order information transmission device using a terminal block and a supervisory control device according to a conventional example.

[Explanation of symbols]

1 Terminal block with signal conversion function, 2 Terminal block (input terminal), 3 diode, 4 Terminal block (output terminal), 5 connector, 1
1 basic terminal block, 30 monitoring and control devices,
40 digital signal input circuit, 50 upper information transmission device, 51 signal output contact.

Claims (5)

[Claims] A terminal block having a plurality of input terminals, a signal converter for coding a signal from the input terminal, and a terminal block having a plurality of output terminals for outputting the converted input signal. A terminal block with a signal conversion function. 2. An output terminal connected to a plurality of pairs of input terminals via diodes, and another output terminal commonly connected to one input terminal of each pair via another diode. A terminal block with a signal conversion function, comprising: 3. An output terminal connected to a plurality of pairs of input terminals via respective diodes, another output terminal commonly connected to one input terminal of each of the pairs via respective different diodes, and A terminal block with a signal conversion function, further comprising: another output terminal commonly connected to another input terminal of each pair via a different diode. 4. A portion having one common output terminal and an input terminal connected to the common output terminal among the input terminal and the output terminal is divided into another portion, and a connection line of both portions is connected to a connector. 4. The terminal block with a signal conversion function according to claim 2, wherein the terminal block is connectable. 5. The terminal block with a signal conversion function according to claim 1, wherein the terminal block is provided at an output section of an information transmission device for a higher order.