JPH04340103A - Input/output element for programmable controller and its socket - Google Patents

Abstract

PURPOSE:To reduce the number of sockets and to minimize a device by simultaneously mounting an I/O element of a large size over the plural sockets and connecting a signal to tone of the sockets. CONSTITUTION:An AC input element 10 has twice the size of a mounting face of an element socket 30 whose plan size is normal. Two engaging projections 12 are formed on both sides of the twice size element 10 and an interval between the two engaging projections 12 is set up so that respective projections 12 are engaged with the receiving part 31 of the socket 30. Plural signal I/O pins for the element 10 are aligned so as to be inserted into corresponding pin connectors for one of plural adjacent sockets 30. The sockets 30 are adjacently arranged in the X direction and fixed in a programmable controller body. Thus various I/O elements including signal conversion circuits whose sizes are respectively different can be used in common through one socket.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an input/output element for a programmable controller having a built-in signal conversion circuit for converting input/output signals, and a socket thereof.

0002

[Prior Art] A programmable controller inputs a contact signal (input signal) indicating the operating state from a device to be controlled, performs a sequence operation based on the input signal, and produces a contact signal (output signal) that specifies the operation of the device. Determine. This contact signal is output to the above device. Since programmable controllers often remotely control devices to be controlled, normally when exchanging input/output signals between the programmable controller and the device to be controlled, the input/output signals are set to a high voltage transfer level, and the programmable controller Inside, the voltage is converted to a low voltage control level.

[0003] In some cases, an AC transfer signal is converted to a DC control signal.

For this purpose, an input/output signal conversion circuit is provided within the programmable controller.

[0005] Photocouplers and the like are used for the input/output conversion circuit, but because they frequently fail, the input/output signal conversion circuit is replaced by a structure in which the built-in input/output elements can be detached from the programmable controller body. I'm trying to do that.

[0006]

[Problems to be Solved by the Invention] However, in conventional programmable controllers, input and output elements are assigned dedicated mounting positions for each type, so if there are many input/output signals, the programmable controller becomes large. There was a problem.

[0007] In order to solve this problem, the applicant of the present application selected the input element and the output element in one element socket on the programmable main body side, with the external shape and pin arrangement of the input element and output element being the same. Patent application No. 2-47 for a programmable controller that can be attached to
No. 165 and Japanese Patent Application No. 3-3244.

According to this proposal, the number of element sockets can be reduced compared to the conventional method, so that the device can be made smaller.

However, there are several types of input/output elements depending on the current capacity, and in particular, 10 mA or more alternating current (AC) input elements and 2 A class solid state relays (SSR).
) and transistor output elements have cooling fins attached, so their shapes are larger than other types of input/output elements.

[0010] As a result, the above proposal still has some points to be improved in that these large-sized input/output devices cannot be mounted in normal-sized device sockets.

[0011] In view of these points, the object of the present invention is to
It is an object of the present invention to provide an input/output element for a programmable controller and a socket thereof, in which elements having different external sizes can be used in common.

0012

[Means for Solving the Problems] In order to achieve such an object, a first aspect of the present invention is an input/output element that is removably connected for signals to an element socket attached to a programmable controller main body. , conversion of input or output signals to the programmable controller;
In an input/output element using a built-in signal conversion circuit, the external shape is such that it can be attached to a plurality of the element sockets adjacent to each other, and any one of the plurality of element sockets
It is characterized by a pin arrangement that allows signal connection.

[0013] A second aspect of the present invention is an input/output element which is removably connected to an element socket attached to a programmable controller main body, and which converts input or output signals to the programmable controller. In the input/output element that uses the built-in signal conversion circuit,
The size of the main body of the input/output element is made variable in a direction perpendicular to the surface on which the input/output element is mounted in the element socket, depending on the size of the signal conversion circuit. It is characterized by what it did.

A third aspect of the present invention is an input/output element socket for removably connecting input/output elements for converting signals input to or output from a programmable controller, the socket having at least one first socket. A second input/output element having one or more connectors for signal connection of each input/output element, and having a planar space for a plurality of the first input/output elements, is connected to one of the one or more connectors. It is characterized in that the one or more connectors are arranged so as to be able to be connected to.

[0015]

[Operation] The present invention focuses on the fact that a plurality of conventional device sockets are arranged at equal intervals in a fixed direction, and by providing an input/output device with a planar space equivalent to a plurality of device sockets, large-sized It also enables the installation of input/output elements with built-in signal conversion circuits.

Furthermore, by making only the height direction of the input/output element variable, input/output elements with different signal formats can be commonly used for one socket.

Furthermore, since input/output elements of different shapes can be commonly used on the socket side, there is no need to prepare various sockets for each type of input/output element shape as in the past, and the device can be made smaller. can be realized.

[0018]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows the external appearance of an input element and a socket according to a first embodiment of the present invention.

In FIG. 1, reference numeral 10 denotes a double-sized element for AC input, and its plane size is twice the size of the mounting surface of a normal element socket 30. Two engaging protrusions 12 are provided on the side surface of the double-sized element 10, and the interval between the two engaging protrusions is set so that each engaging protrusion 12 engages with the receiving part 31 of the element socket. ing.

Further, the signal input/output pins 11 for the double-sized device are arranged in a row, and can be inserted into one pin connector 32 of a plurality of adjacent device sockets.

The element sockets 30 are fixedly installed on the main body of the programmable controller so as to be adjacent to each other in the X direction in the figure.

In this embodiment, the element socket 30 can be used as a pair with a normal socket, but the two element sockets can be integrated and used as a double-sized element socket. Good too. Furthermore, it goes without saying that an even number of two or more sockets for elements may be integrated.

[0024] In addition to double the size of the element socket,
As shown in FIG. 2, it is also possible to make the size four times that of a normal element.

FIG. 3 shows the element shape in the second embodiment of the present invention.
Shown below.

When the element in this example has a larger current capacity or a larger signal conversion circuit built-in than a normal element, it has the same planar shape and pin arrangement as the normal element, and the height of the main body is made larger than that of the normal element. ing.

The structure of the input/output element and its socket will be explained using FIG. 4.

In FIG. 4, socket 101 is provided with relay terminal insertion holes 103' to 107' arranged in the same manner as terminals 103 to 107 of input/output element (relay) 102, and relay terminals are inserted in the upper part of these insertion holes. A contact piece with a contact part on the tulip that holds the terminal, and a contact piece with terminal parts 103'' to 107'' soldered to the printed circuit board 108 is buried in the lower part. Relay 102 to socket 101
When inserted, the relay signal is transmitted via the socket 101 to a control unit of a programmable controller or a controlled device (not shown).

[0029] I/O (input/output) relays used as input/output terminals have different external dimensions depending on whether they are for input or output, operating voltage specifications, output rated capacity, or whether they have contact or non-contact. FIG. 5 shows the mounting states of I/O relays of different sizes. In FIG. 5, 109 to 111 indicate an example, and 109 is an S (small) size relay, and 110 is an S (small) size relay.
is called a W (medium) size relay, and 111 is called a 2W (large) size relay.

Socket 10 into which these relays are inserted
1, a plurality of identical ones are successively arranged on the printed circuit board 108 at the same pitch P. The width dimension of the relay is determined based on "integral multiple of the socket mounting pitch P+socket width dimension". In other words, the S size relay 109 has the same socket width A, and the W size relay 110 has the socket width “1P+”.
A", the 2W size relay 111 becomes "3P+A".

Therefore, when these I/O relays are inserted into a socket, the S size relay 109 and the socket 101 are inserted as a pair.

The W size relay 110 is inserted across two sockets, and the terminal of the W size relay 110 is inserted into one of the sockets 101, with one socket 101 serving as a dummy.

The 2W size relay 111 is inserted across four sockets, and like the W size relay 110, the relay terminal is inserted into only one socket 101 among them, and the remaining three sockets 101 are Becomes a dummy.

According to the above structure, I/O relays having different widths can be inserted into a common socket at any position without interfering with each other.

[0035]

As described above, according to the present invention, various input/output elements with built-in signal conversion circuits of different sizes depending on the type of signal to be converted and the size of current capacity can be integrated into one. Since it can be used in common with one socket,
It is not necessary to provide a socket for each type of input/output element as in the past, and the device can be made more compact. Furthermore, members such as pin connecting portions can be used in common even on the side of input/output elements of a plurality of types, thereby contributing to a reduction in manufacturing costs. In addition, since input/output elements of different sizes can be attached to any socket, the work of attaching the input/output elements becomes easier.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the external shape of an input/output device and a socket according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the external shape of another input/output element according to the embodiment of the present invention.

FIG. 3 is a perspective view showing the external shape of an input/output device according to a second embodiment of the present invention.

FIG. 4 is a perspective view showing the structure of an input/output device and a socket according to the first and second embodiments of the present invention.

FIG. 5 is a side view showing how the input/output device according to the first embodiment of the present invention is attached to the socket.

[Explanation of symbols]

10 Double size element for AC input 11 pin 12 Engagement protrusion 30 Element socket 31 Receiving part 32 pin connector 40 4x size input/output element body 41,51 Cooling fins 50 Input/output element body 101 Socket 102 I/O relay 103-107 Terminal 103'~107' Insertion hole 103″~107″ Terminal part 108 Printed circuit board 109 S size relay 110 W size relay 111 2W size relay

Claims (3)

[Claims] 1. An input/output element that is removably connected to an element socket attached to a programmable controller main body, the input/output element converting input or output signals to the programmable controller using a built-in signal conversion circuit. The input/output device has an external shape that can be attached to a plurality of the device sockets adjacent to each other,
An input/output element for a programmable controller, characterized in that the pin arrangement is such that a signal can be connected to any one of the plurality of element sockets. 2. An input/output element that is removably connected to an element socket attached to a programmable controller main body, the input/output element converting input or output signals to the programmable controller using a built-in signal conversion circuit. In the input/output element to be used, the size of the main body of the input/output element is determined according to the size of the signal conversion circuit with respect to the direction perpendicular to the surface on which the input/output element is installed in the element socket. An input/output element for a programmable controller characterized by being variably formed. 3. An input/output element socket for removably connecting an input/output element that converts signals input to or output from a programmable controller, the socket comprising: 1
A second input/output element having one or more connectors for signal connection to each of the first input/output elements and having a planar space equivalent to a plurality of the first input/output elements,
A socket for an input/output element of a programmable controller, characterized in that the one or more connectors are arranged so that it can be connected to any one of the connectors described above.