JPH0563958B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial Application Field This invention relates to a terminal unit placed between an electronic device such as a sequencer that has a relatively large number of input/output points and input/output channels, and various controlled objects. The present invention relates to an output terminal device that constitutes an output terminal device.

(b) Summary of the Invention This invention connects the main body of an electronic device and a terminal section with a cable for transmitting serial data, such as an optical fiber, and provides a conversion circuit for distributing the serial data in parallel in the terminal section. An arbitrary number of terminal blocks can be detachably connected to the circuit, and an output relay and a terminal block can be detachably attached to the terminal block.

(c) Conventional technology In a sequencer, which is a typical example of an electronic device with a large number of input/output points and a large number of input/output channels, conventionally, as shown in Fig. 5, the sequencer body 1 is equipped with a CPU and a basic number of input/output points. Two basic units 2
A plurality of expansion units 3 for increasing the number of input/output points are housed, and terminal groups 4 are arranged to be connected by wiring from the basic unit 2 and each expansion unit 3 to each input/output number. In the illustrated example, basic unit 2 has 16 input points and 8 output points, and expansion unit 3 has 16 input points and 8 output points.
A total of 8 units are arranged, and a total of 8 extension units each having 8 output points are also arranged. Further, as the terminal group 4, five terminal blocks of 60P (60 terminals) are arranged so that the total number of terminals is 300.

(d) Problems to be solved by the invention However, in the above configuration, the number of wiring lines connecting the terminal group 4 and each unit on the back side of the panel of the main body 1 becomes extremely large, making the wiring work complicated. In addition, when trying to add new input/output numbers, the work is extremely troublesome. In addition, the main body 1 is also very large, and the wiring lines on the back side of the panel are long, making it extremely susceptible to noise.

The purpose of this invention is to eliminate the above-mentioned drawbacks, and to use a cable for transmitting serial data to connect the electronic equipment and the conversion circuit of the terminal section, and to make the terminal section into a block, thereby making it compact and workable. An object of the present invention is to provide a significantly improved output terminal device for electronic equipment.

(e) Means for Solving the Problems The output terminal device of the present invention is an output terminal device placed between an electronic device and a controlled object, and transmits serial data from the electronic device side to the output terminal device side. a control box equipped with a conversion circuit that converts serial data transmitted by this cable into parallel data; and a control box that is integrally connected to one side of the control box and that is connected in parallel to the side to be controlled by the conversion circuit. a board including a plurality of wiring lines to be connected; a base supporting the board; and a board removably attached to the board and the base;
a first contact having a relay receiving part and a terminal block receiving part, one end of which is connected to one of the plurality of wiring lines via a relay drive circuit, and the other end of which is located in the relay receiving part; a second contact located in the receiving portion and the other end of which is located in the terminal block receiving portion; A relay connected to one end of the terminal block; and a terminal block provided with a terminal connected to the other end of the second contact and detachably attached to the terminal block receiving part.

(f) Operation In this invention, serial data output from an electronic device is transmitted to a known conversion circuit within a control box via a cable. The conversion circuit distributes this serial data in parallel. A plurality of wiring lines are connected in parallel to this conversion circuit, and data distributed in the conversion circuit is output to each of the plurality of wiring lines. One end of a first contact of the terminal block is connected to each of the plurality of wiring lines, and a relay is connected to the other end of the first contact. Furthermore, one end of a second contact is connected to this relay, and the other end of this second contact is connected to a terminal block. Therefore, the data output from the conversion circuit to the plurality of wiring lines is input to the relay of each individual terminal block via the first contact, and the output of this relay is input via the second contact. Output to terminal block.

On the other hand, a board supported by the base is integrally connected to one side of a control box that houses the conversion circuit, and a terminal block having a first contact and a second contact can be detachably attached to this board. It will be installed. Further, this terminal block is formed with a relay receiving part and a terminal block receiving part, and a relay and a terminal block are detachably attached to each of them. Connection between the relay and the wiring line on the board is made through a first contact, and connection between the relay and the terminal block is made through a second contact. Therefore, wiring work for the terminal device can be done simultaneously by mounting the terminal block on the board, and mounting the relay and terminal block on the terminal block, and furthermore, there is no need for wiring to be connected and the work for connecting it.

(O) Embodiment FIG. 1 is an exploded perspective view of an output terminal device of a sequencer which is an embodiment of the present invention.

In the figure, 10 is a control box. This control box 10 is connected to an optical fiber cable 1 via an optical fiber connector 11.
2 are joined at one end. Fiber optic cable 1
The other end of 2 is connected to a sequencer main body (not shown). The optical fiber cable 12 includes an optical fiber and two power supply lines (not shown), and the power supply lines supply power to a conversion circuit in the control box 10 and a board to be described later. The optical fiber constitutes a transmission path for serially exchanging data between the sequencer main body and the conversion circuit built in the control box 10.
This conversion circuit is a known conversion circuit that converts serial data into parallel data. As this conversion circuit, for example, UART (Universal
Asynchronous Receiver Transmitter) can be used. Note that it is also possible to configure a transmission path using a twisted pair cable using electrical signals instead of optical signals. The conversion circuit converts the data on the optical fiber into parallel data for each output number and transfers the data to wiring lines on the board, which will be described later.

One end of a substrate 13 is coupled to one side of the control box 10. On the substrate 13, one common terminal 14 is formed to protrude rearward, and a plurality of wiring lines 15 equal in number to the number of outputs that can be handled by the control box 10 run in parallel. In front of the common terminal 14, terminals 16 whose number is equal to the number of outputs are formed protrudingly. The terminals 16 are arranged in parallel at regular intervals. Furthermore, an IC 17 that integrates a plurality of relay drive circuits is mounted on the board 13. A pin on the rear side of the IC 17 serves as a relay drive signal pin, and is connected to the terminal 16 by a wiring pattern. Also IC
The front pin 17 is connected as an output pin to the wiring line 15 corresponding to the output number. Further, each IC 17 is connected to a power line for supplying power from the control box 10.

The substrate 13 is supported by a base 18 made of aluminum. The bottom of the base 18 has a DIN standard structure and can be engaged with a DIN rail.

A plurality of terminal blocks 19 are detachably mounted on the substrate 13. This terminal block 19 has a relay drive contact (first
20 and a relay output contact (second contact) 27 are embedded. This contact 2
Both ends of 0 and 27 are made up of receiving ends. Therefore, the lower receiving end of the contactor 20 can contact the common terminal 14 and the terminal 16 on the board 13, and the upper receiving end can contact a relay terminal to be described later. Further, in the receiving end portion of the contactor 27, the right receiving end portion contacts a terminal of a terminal block to be described later, and the left receiving end portion contacts a relay output terminal. The terminal block 19 has engaging portions 1 at its front and rear ends that engage with the board 13, respectively.
9b and 19a, each of which can freely slide in left and right horizontal directions along a single side edge of the substrate 13. When the terminal block 19 is slid horizontally along the board 13, the lower receiving end of the contactor 20 slides over the common terminal 14 and the terminal 16, and the terminal block 19 is stopped at the position of the terminal 16. Then, the terminal 16 and the receiving end come into contact with each other.

At the rear of the terminal block 19, a relay engagement piece 24 for mounting a relay is formed to protrude upward. If the relay 50 is placed in this position and the relay terminal is pushed downward through the terminal hole 28 so as to contact each of the contacts 20 and 27, the upper end of the relay engaging piece 24 will be placed in the rear upper shoulder of the relay 50. The relay can be fixed by engaging with it. This relay engagement piece 24
A relay receiving portion is formed above the rear portion of the terminal block 19. As the relay 50, other relays such as solid state relays can be used in addition to electromagnetic relays.

A groove 23 is formed on the upper surface of the front portion of the terminal block 19, and a terminal hole 29, a step portion 30, and an engaging protrusion 31 are formed on the front portion. A mark sheet (not shown) representing the output number of the terminal block is inserted into the groove 23. The terminal hole 29 is a hole into which a terminal of a terminal block to be described later is inserted. The stepped portion 30 is for placing a terminal block to be described later, and the engaging protrusion 31 is for fixing the terminal block placed on the stepped portion 30. That is, the stepped portion 30 and the engaging protrusion 31 constitute a terminal block receiving portion. Both left and right end surfaces of the terminal block 19 are planar, so that when a plurality of blocks are put together, they are in close contact with each other.

The terminal block 40 has a plurality of plug portions 41 arranged in upper and lower stages.
and upper and lower terminals 42 internally connected to each plug part.
It is equipped with The plug part 41 is the terminal block 1
It can be inserted into the insertion hole 29 of No. 9. When inserted, the plug portion 41 contacts the receiving end of the contactor 27. Terminal block 40 is connected to terminal block 19
When placed on the stepped portion 30 of the terminal block, the engaging protrusion 31 formed on the terminal block engages with the groove portion 43 formed on the bottom surface of the terminal block 40, and the terminal block 4
0 is fixed to the terminal block 19.

FIG. 2 is a front view of the output terminal device when terminal blocks 19 equal to the number of outputs that can be handled by the control box 10 are installed. The end plate 60 is fixed by passing through a screw hole into the threaded portion 44 formed on the side end surface of the base 18 and fixing the end plate 60 with a screw. The end plate 60 is fixed to the base 18 after all the necessary terminal blocks 19 have been installed, and has the role of preventing the terminal blocks 19 from coming off in the lateral direction.

FIG. 3 shows a sectional view of the terminal device. In the figure, 45 is a rail engaging member for engaging with the DIN rail. As shown in the figure, the receiving ends formed at both ends of the two contacts 20 of the terminal block 19 are connected to the base plate 13, respectively.
It is in contact with the upper terminals 14, 16 and the relay terminal. Further, receiving end portions formed at both ends of the other two contacts 27 are in contact with the output terminal of the relay 50 and the plug portion 41 of the terminal block 40, respectively. As a result, the output signal of IC17 is transmitted to terminal 14,
16 to a relay 50 via a contact 20, and the output of the relay 50 is further led to a terminal 42 of a terminal block 40 via a contact 27. In addition, in the control box 10, a conversion circuit housed inside converts the serial data on the optical fiber into parallel data for each output number (each number corresponds to each control target) and connects it to the wiring line 15 corresponding to each output number. Additionally, each relay drive circuit within the IC 17 forms a relay drive signal based on the signal on its respective wiring line. As a result, if the number of outputs that can be handled by the control box 10 is 16, for example, 16 points of output data can be transmitted from the sequencer main body to the control box 10 using one cable.

Figure 4 shows the output terminal device shown above.
FIG. 10 shows a front view of a sequencer when eight input terminal devices having a similar configuration are used. Note that each terminal device has a number of input points.
16, I am using one with 16 output points. In the figure, 5 is a transmission module connected to the basic unit, and optical fiber cables are connected from this transmission module 5 to each output terminal device.
Each book will be placed one by one. In other words, a total of 16 optical fiber cables are required. 6 indicates an optical fiber duct. As is clear from the comparison with Figure 5, in this example, the maximum number of input and output points is 128.
It can be seen that while it can be made extremely large, the whole can be made extremely small. This is because there is no need to provide additional units compared to the conventional device shown in FIG. In addition, the number of cables installed behind the panel is only 16, and data is transmitted using optical fibers (or twisted pace wires), making wiring work extremely simple. It can also be extremely resistant to noise.

(h) Effects of the Invention As described above, according to the present invention, it is possible to downsize the entire electronic device, and the noise resistance is improved because the number of lines connecting each terminal device and the main body of the electronic device can be reduced. There are significant improvements to be made. Further, the wiring work is extremely simple and has the effect of improving operability. Furthermore, the entire terminal device is made up of blocks, and since the terminal blocks can be installed for each output number, even if one terminal block becomes defective, it can be replaced extremely easily. Similarly, even if the terminal block, relay, or board becomes defective, there is an advantage that it is extremely easy to replace them.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of an output terminal device for a sequencer according to an embodiment of the present invention. Also,
FIG. 2 is a front view of the output terminal device after assembly, FIG. 3 is a sectional view of FIG. 2, and FIG. 4 is a front view of an example of a sequencer using the terminal device of the present invention. Further, FIG. 5 is a front view of an example of a conventional sequencer. 10... Control box, 12... Optical fiber cable, 13... Board, 14... Common terminal on the board, 15... Wiring line, 16... Terminal on the board,
17...EC, 18...Base, 19...Terminal block, 20, 27...Contactor, 40...Terminal block, 50...Relay.

Claims (1)

[Claims] 1. An output terminal device disposed between an electronic device and a controlled object, comprising: a cable for transmitting serial data from the electronic device side to the output terminal device side; A control box equipped with a conversion circuit that converts serial data into parallel data; and a board equipped with a plurality of wiring lines that are integrally coupled to one side of the control box and connected in parallel to a side to be controlled by the conversion circuit. a base that supports the board; and a base that is removably attached to the board and the base;
a first contact having a relay receiving part and a terminal block receiving part, one end of which is connected to one of the plurality of wiring lines via a relay drive circuit, and the other end of which is located in the relay receiving part; a second contact located in the receiving part and the other end of which is located in the terminal block receiving part; An electronic device comprising: a relay connected to one end of the second contact; and a terminal block provided with a terminal connected to the other end of the second contact and detachably attached to the terminal block receiving part. Output terminal device. 2. The output terminal device for electronic equipment according to claim 1, wherein the cable is composed of an optical fiber. 3. The output terminal device for electronic equipment according to claim 1, wherein the cable is composed of twisted pair wires. 4. A terminal device for electronic equipment according to any one of claims 1 to 3, wherein the base has a rail attachment frame.