JPH08147006A - Input device for control - Google Patents

Abstract

PURPOSE: To prevent a surplus circuit from being generated for any kind of and any number of input signals by providing a wiring board on where input circuit block components with which an input circuit including a photocoupler is united and input terminals and output terminals connecting with the mounted input circuit block components are formed. CONSTITUTION: Plural power sources for input signals are connected to the primary-side light emitting diode 5a of the photocoupler 5 through input switches provided by the power sources, and an input circuit which leads the input signal out of the secondary-side phototransistor 5 of the photocoupler 5 and corresponds to one channel is united by plural input circuit block components 12 and 16. Then the input circuit block components 12 and 16 are inserted into connectors 17 freely detachably. The connectors 17 are connected to the wiring board 11 where the input terminals IN and output terminals OUT are formed. Consequently, no surplus circuit is generated for any kind of and any number of input signals.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control input device,
In particular, the present invention relates to a control input device configured to connect a plurality of different types of input signals with a single wiring board.

[0002]

2. Description of the Related Art Generally, input signals handled by an input device of a programmable controller include an AC input signal, a DC input signal and the like, each having an exclusive circuit configuration according to the type and magnitude of voltage. Is used. FIG. 4 is a configuration diagram of an input device having a circuit dedicated to AC input. In the figure, reference numeral 1 is a printed wiring board made of a glass-based epoxy resin material or the like.
AC input circuits 21 and 22 for 2 channels
232 are provided in parallel. The AC input circuit 2 has input terminals IN1, IN2, ... I at one end of the wiring board 1.
N32 and a common input terminal COM1 are provided, and a parallel circuit of a capacitor 3 and a resistor 4a and an input current limiting resistor 4b are connected in series to each input terminal IN. Further, a resistor 4c is provided between the common input terminal COM1 and the input current limiting resistor 4b.
And the primary side light emitting diode 5a of the photocoupler 5 are connected in parallel. On the other hand, the output terminal OU is provided at the other end of the wiring board 1.
T1, OUT2 ... OUT32 and common output terminal COM
2 is provided, the collector side of the secondary side phototransistor 5b of the photocoupler 5 is connected to each output terminal OUT,
The emitter side is connected to the common output terminal COM2. Further, a DC power supply is connected to the collector side of the phototransistor 5b via the load resistor 4d of the phototransistor 5b. When a plurality of AC input signal power supplies are connected to the input terminal IN of the input device configured as described above through the input switches provided for each power supply and the input switches are turned ON, the primary side of the photocoupler 5 Light emitting diode 5a
An operating current flows through the light emitting diode to emit light, the secondary side phototransistor 5b receives the light and turns on, and the input signal is taken out from the output terminal OUT while being insulated from the primary side.

FIG. 5 is a block diagram of an input device having a circuit dedicated to DC input. In the figure, the wiring board 1 is provided with DC input circuits 61, 62, ... 632 for 32 channels in parallel. As the DC input circuit 6, input terminals IN1, IN2 ... IN32 and a common input terminal COM1 are provided at one end of the wiring board 1. One end of the input current limiting resistor 4b is connected to each input terminal IN, and the other end is connected to the common input terminal COM1. One end of the resistor 4c and the photocoupler 5
Is connected to the primary side light emitting diode 5a. on the other hand,
Output terminals OUT1, OUT2 ... O on the other end of the wiring board 1.
UT32 and common output terminal COM2 are provided, the collector side of the secondary side phototransistor 5b of the photocoupler 5 is connected to each output terminal OUT, and the emitter side is connected to the common output terminal COM2. Further, a DC power supply is connected to the collector side of the phototransistor 5b via the load resistor 4d of the phototransistor 5b. When a plurality of DC input signal power supplies are connected to the input terminal IN of the input device thus configured via the input switches provided for each power supply and the input switches are turned ON, the photocoupler 5
An operating current flows through the primary side light emitting diode 5a to emit light, the secondary side phototransistor 5b receives the light and turns on, and the input signal is taken out from the output terminal OUT in a state insulated from the primary side.

[0004]

However, for example, 16
When used in a programmable controller in which the signal of the channel is an AC input signal and the signal of the other 16 channels is a DC input signal, using the above-mentioned general-purpose input device, each of the AC input device and the DC input device can be used. There is a drawback that the input circuits for the remaining 16 channels are wasted. An object of the present invention is to solve the above-mentioned problems by using individual input circuit block components, so that an input device in which a surplus circuit is not generated for any kind of any number of input signals. To provide.

[0005]

A control input device of the present invention is a control input device for connecting a plurality of photocouplers corresponding to a plurality of channels to different power sources, and an input circuit including the photocoupler is integrated. And a wiring board on which the input circuit block component is detachably mounted and which has input terminals and output terminals connected to the mounted input circuit block component. To do. Further, the input circuit block component is an input circuit component in which input circuits corresponding to a predetermined number of channels are integrated. In addition, the input circuit block component is a predetermined number of AC input circuit block components and / or
Alternatively, it is a DC input circuit block component. Further, the input circuit block component is a predetermined number of input circuit block components corresponding to different input voltages. Further, it is characterized in that input block components corresponding to different power sources are inserted and connected to the wiring board.

[0006]

According to the above construction, the type of input signal (AC,
Since the input device can be configured by preparing as many input circuit block components individually corresponding to DC and different input voltage values as many as the required number of channels, a redundant circuit can be provided for any number of input signals. Does not occur. Therefore, an inexpensive and small input device can be provided.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIGS. The same parts as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted. In FIG. 1, reference numeral 12 denotes an AC input circuit corresponding to one channel, which is integrated by resin sealing,
An AC input circuit block component in which the input pin 12a, the common input pin 12b, the common output pin 12c, and the output pin 12d are derived, 16 is a DC input circuit corresponding to one channel, which is integrated by resin sealing, for example, and the input pin 16a, It is a DC input circuit block component derived from the common input pin 16b, the common output pin 16c, and the output pin 16d. 1
Reference numeral 1 is a printed wiring board made of a glass-based epoxy resin material or the like for mounting the AC input circuit block component 12 and / or the DC input circuit block component 16 in 32 channels corresponding to a plurality of types of input signal power sources. Connectors 171, 172, ..., 1732 are provided for inserting and removing the input pins and output pins of the components. The AC input circuit block component 12 incorporates an AC input circuit as shown in FIG. 2, for example, which is shown in FIG.
It is basically the same as the AC input circuit corresponding to the channel. The DC input circuit block component 16 incorporates, for example, a DC input circuit as shown in FIG. 3, which is basically the same as the DC input circuit corresponding to one channel shown in FIG. However, the input terminal IN shown in FIGS.
Common input terminal COM1, load resistance 4d, output terminal OU
The T and common output terminals COM2 are not incorporated in the input circuit block components 12 and 16, but are provided to the wiring board 11 as in FIGS. As shown in FIG. 1, the connector 17 includes an input terminal IN and a connector terminal 17a, a common input terminal COM1, a connector terminal 17b, and a common output terminal CO.
M2 is connected to the connector terminal 17c, and the output terminal OUT is connected to the connector terminal 17d.

Such input circuit block parts 12, 1
When an input device corresponding to, for example, an AC input signal of 8 channels and a DC input signal of 16 channels is configured using the 6 and the wiring board 11, as shown in FIG. Channel eye connector 17
Eight AC input circuit block components 12, 12 ... Are connected to terminals 1, 172 ... 178 of the input circuit block component 1
2a, 12b, 12c, 12d and connector terminal 17a,
17b, 17c and 17d are inserted in correspondence with each other.
Next, 16 DC input circuit block components 16, 16 ... Are connected to the connectors 179, 1710, ... 1724 of the 9th to 24th channels and the terminals 16a, 16b, 16c, 16d of the input circuit block components and the connector terminals. 17a, 17b, 17c and 17d are inserted in correspondence with each other. In this way, the input circuit block components 12 and 16 individually corresponding to the AC input signal and the DC input signal are prepared by the number corresponding to the required number of channels, and the same wiring board 11 is provided.
Since the input device can be configured by, it is not necessary to use a dedicated input device corresponding to the AC input signal and the DC input signal, and a surplus circuit does not occur.

The input device of the programmable controller compatible with the 8-channel AC input signal and the 16-channel DC input signal, which uses the wiring board 11 compatible with the 32-channel input signal, has been described above. Not limited to this example, various input signals (AC, D
Needless to say, it is possible to realize an optimum control input device that does not generate an excessive circuit even for an input signal source having a large number of C, the difference between input voltage values. The input circuit block component is not limited to being integrated by resin sealing, but may be integrated with a small printed wiring board made of a glass-base epoxy resin material, for example. Further, in the present embodiment, the input circuit block component has been described as an integrated input circuit corresponding to one channel, but an input circuit corresponding to a plurality of channels may be integrated.

[0010]

According to the present invention, since the input device can be constructed by preparing the input circuit block components corresponding to the types of the input signals by the required number of channels, any number of input signals can be constructed. No extra circuit is generated. Therefore, it is possible to provide a general-purpose control input device equipped with an inexpensive and small input device.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a control input device according to an embodiment of the present invention.

FIG. 2 is a circuit diagram of an AC input circuit block component that constitutes the input device of the present invention.

FIG. 3 is a circuit diagram of a DC input circuit block component that constitutes the input device of the present invention.

FIG. 4 is a configuration diagram of a conventional input device having a circuit for exclusive use of AC input.

FIG. 5 is a configuration diagram of a conventional input device having a circuit for exclusive use of DC input.

[Explanation of reference numerals] 5 Photocoupler 11 Wiring board 12 AC input circuit block component 17 DC input circuit block component

Claims (5)

[Claims] 1. A control input device for connecting a plurality of photocouplers corresponding to a plurality of channels to different power supplies, the input circuit block component having an integrated input circuit including the photocoupler, and the input circuit block component. And a wiring board having an input terminal and an output terminal connected to the mounted input circuit block component. 2. The control input device according to claim 1, wherein the input circuit block component is an input circuit component integrated with an input circuit corresponding to a predetermined number of channels. 3. The input circuit block component comprises a predetermined number of ACs.
The control input device according to claim 1, which is an input circuit block component and / or a DC input circuit block component. 4. The control input device according to claim 1, wherein the input circuit block components are a predetermined number of input circuit block components corresponding to different input voltages. 5. The control input device according to claim 1, wherein input block components corresponding to different power supplies are inserted and connected to the wiring board.