JPH08272406A - Sub base unit and programmable controller using the same - Google Patents

Abstract

PURPOSE: To correspond to a processing unit for extension bus correspondence easily at a low cost. CONSTITUTION: A connector 21 for position fixing to be connected to the main bus connector 13a of a main base unit 1 is provided on the back face side of a sub base unit 2 to load the sub base unit 2 incorporating an extension bus 23 on the main base unit 1 incorporating a main bus 11. Two slots of extension bus connectors 22a, 22b connected to the extension bus 23 are provided on the front side of the sub base unit 2, and the shape of the sub base unit 2 is formed without providing a main bus connector on the back face so as to load the processing unit corresponding to both the main bus 11 and the extension bus 23, and also, it is formed in shape in which a part confronting with the main bus connector on the main base unit 1 is formed by bringing down notched T-shape sideways.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sub-base unit in which various processing units are attached to a main bus connector on the base side provided for each slot on a main base unit and connected via a main bus. The present invention relates to a programmable controller (hereinafter referred to as "PLC") using this.

[0002]

2. Description of the Related Art Conventionally, a program execution control device such as a PLC for controlling an external device by executing a program is a C
A configuration in which various processing units such as a PU unit, a memory unit, and an I / O unit are attached to a connector provided for each slot on the main base unit and connected via a main bus in the main base unit. Therefore, the conventional PLC main base unit is provided only with the main bus.

[0003]

By the way, recently, various processing units corresponding to an expansion bus which newly support the expansion bus have appeared.

However, when it is attempted to use various processing units compatible with such an expansion bus, only the main bus is provided in the main base unit of the conventional PLC, and the expansion bus is not provided. There was a problem that the corresponding processing units could not be used effectively.

For such a unit compatible with the expansion bus, it is possible to newly prepare a dedicated base unit having both a main bus and an expansion bus to support it. In such a case, There is a problem that the conventional main base unit cannot be used, resulting in high cost.

Therefore, the present invention has been made in view of such a problem, and provides a sub-base unit that can easily and inexpensively support a processing unit compatible with an expansion bus, and a programmable controller using the sub-base unit. The purpose is to

[0007]

In order to achieve the above object, according to the invention of claim 1, the main side base bus connector provided for each slot on the main base unit is mounted together with various processing units. A sub base unit connected to the processing unit via the main bus, and a position fixing connector connected to the base side main bus connector is provided on the back side,
The present invention is characterized in that a plurality of base-side expansion bus connectors, each having a built-in expansion bus and connected to the expansion bus, are provided on the front surface side.

According to the second aspect of the invention, the first aspect is
In the sub-base unit described, the position fixing connector is a through-type connector in which the processing unit can be mounted on the front side, and which is also electrically connected to the base side main bus connector on the main base unit, It is characterized by

In the invention according to claim 3, the invention according to claim 1
Alternatively, in the sub-base unit according to claim 2, the position fixing connector is provided corresponding to a base-side main bus connector for each slot on the main base unit, while a plurality of base-side expansion bus connectors are provided on the base side. It is characterized in that each slot is provided at a position not overlapping with the main bus connector.

According to the invention described in claim 4,
Alternatively, in the sub-base unit according to claim 2, the position fixing connector is provided corresponding to a base-side main bus connector for each slot on the main base unit, while a plurality of base-side expansion bus connectors are provided on the base side. Each slot is provided at a position that does not overlap with the main bus connector, and more than the number of position fixing connectors are provided, and there are no position fixing connectors on the back side, and the base side main bus connector on the main base unit It is characterized in that the facing portions are notched.

Further, in the invention according to claim 5, in the sub-base unit according to claim 1, claim 2, claim 3 or claim 4, the rear side is provided at the upper and lower ends of each slot on the main base unit. A hole for fixing the main base unit is provided at a position corresponding to the hole for fixing the various processing units or sub-base units, and the processing unit is fixed on the front side of that position. It is characterized in that a hole portion for making it is provided.

According to the invention of claim 6, in the sub-base unit of claim 1, claim 2, claim 3, claim 4 or claim 5, the position fixing connector is connected to the main base unit main body. A power supply pin connected to the power supply line of the bus is provided, the power supply pin is connected to the power supply pin in the base side expansion bus connector on the front side, and the main bus power supply line and the expansion bus power supply line are connected. It is characterized by

According to a seventh aspect of the present invention, there is provided a programmable controller using the sub-base unit according to the first, second, third, fourth, fifth or sixth aspect. It is characterized by

According to the invention of claim 8, claim 7 is provided.
In the programmable controller described above, the processing unit has a processing-side main bus connector connected to the base-side main bus connector on the main base unit and a processing-side expansion bus connector connected to the base-side expansion bus connector on the sub-base unit. And the processing-side main bus connector and the processing-side expansion bus connector respectively include a base-side main bus connector on the main base unit and a base-side expansion on a sub-base unit mounted on the main base unit. The processing-side expansion bus connector is provided at a position retracted by the height of the sub-base unit from the processing-side main bus connector so as to be connected simultaneously with the bus connector.

[0015]

According to the present invention, the sub-base unit is connected to the base main bus connector on the main base unit via the position fixing connector on the rear side of the sub-base unit. Then, a plurality of processing units are mounted on the front side of the sub-base unit via a plurality of base-side expansion bus connectors, and the plurality of processing units are connected via an expansion bus with a built-in sub-base unit.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a sub-base unit according to the present invention and a PLC using the same will be described below with reference to the drawings.

FIG. 1 shows a schematic structure of a sub-base unit according to the present invention and a first embodiment of a PLC using the sub-base unit.

The main base unit 1 is similar to the conventional base unit, has a built-in main bus 11, and has a main bus connector 13a on the base side connected to the main bus 11 above each slot 12a to 12c.
13 c is provided so as to project to the front, and various processing units (not shown) such as a conventional master CPU unit and I / O unit corresponding to the main bus are provided in the slots 12 a to 12.
Each c is attached to the base side main bus connectors 13a to 13c, and is connected via the main bus 11.

The sub-base unit 2 has a base-side main bus connector 13a at the upper side of each slot corresponding to the base-side main bus connector 13a on the main base unit 1 on the rear side facing the main base unit 1.
One position fixing connector 21 to be connected to the position fixing connector 21 is provided, and each position fixing connector 21 is provided at the middle position of the slot which does not overlap with the position fixing connector 21 on the front side. Of the base expansion bus connectors 22a and 22b, which are more than the number of slots (here, two slots), are provided.
3 are connected and configured.

In the first embodiment, the position fixing connector 21 is for fixing the slot position mechanically connected to the base side main bus connector 13a on the main base unit 1, and is the base side main bus connector. It is not electrically connected to 13a.

The shape of the sub base unit 2 is
The position fixing connector 21 is not provided on the sub base unit 2 so that the processing units corresponding to both the main bus 11 and the expansion bus 23 described later are connected,
Further, the main base unit 1 is formed in a shape in which a portion facing the main bus connector 13 on the base side is cut out, that is, in a shape in which a T-shaped protruding middle portion provided with the base expansion bus connector 22 is laid down sideways. There is.

The heights of the main base unit 1 and the sub base unit 2 are the same, and the distance between the slots is also the same, so that the sub base unit 2 can be mounted in any slot on the main base unit 1. Has been formed.

In addition, since the connection strength between the connectors at the upper and lower ends of the main base unit 1 and the sub base unit 2 is insufficient, screws for fixing other units mounted on the base unit, respectively. Holes 14, 2
4 etc. are provided.

FIG. 2 shows a state in which the sub base unit 2 is mounted on the main base unit 1.

As shown in the figure, the main base unit 1
The upper base main bus connector 13a and the position fixing connector 21 on the sub base unit 2 are fitted and connected to each other, and the sub base unit 2 is fixed on the main base unit 1 so that the slot positions match. Has been done.

Next, the structures of various processing units mounted on the main base unit 1 and the sub-base unit 2 thus constructed will be briefly described.

3 (a) and 3 (b) show the external appearance of the processing unit mounted on one of the main base unit 1 and the sub base unit 2, respectively.

(A) shows the appearance of the main bus-compatible processing unit 3a mounted on the main base unit 1. The upper surface of the rear surface of the unit, which is the mounting surface, shows
A processing-side main bus connector 31a connected to the base-side main bus connectors 13a to 13c provided on the upper stage of the main base unit 1 is provided.

When the main base unit 1 and the sub base unit 2 are mounted in the state shown in FIG. 2, the processing side main bus connector 31a of the processing unit 3a is connected to the main base side of the main base unit 1. It will be connected to the bus connector 13c.

(B) shows the appearance of the processing unit 3b for the expansion bus, which is mounted on the sub-base unit 2. The middle of the back of the unit, which is the mounting surface, is provided in the middle of the sub-base unit 2. A processing-side expansion bus connector 31b connected to the base-side expansion bus connectors 22a and 22b is provided.

If the main base unit 1 and the sub base unit 2 are mounted as shown in FIG. 2, the processing side main bus connector 31b of the processing unit 3b is the base side expansion of the sub base unit 2. It will be connected to the bus connector 22a.

4 (a) and 4 (b) respectively show an external view and a cross section of a processing unit 3c corresponding to both the main bus 11 and the expansion bus 23, which are simultaneously installed in both the main base unit 1 and the sub base unit 2. Is shown.

This processing unit 3c has (a), (b)
As shown in FIG. 3, the base side main bus connectors 13a to 13c provided on the upper side of the main base unit 1 are provided on the upper side of the unit rear surface which is the mounting surface of the processing unit 3c.
A processing-side main bus connector 31c connected to the base-side expansion bus connector 22 provided in the middle of the sub-base unit 2 is provided in the middle of the back surface thereof.
processing side expansion bus connector 32c connected to a and 22b
Is provided.

Then, in this processing unit 3c,
As shown in (a) and (b), the processing side main bus connector 31c and the processing side expansion bus connector 32c are respectively
The middle processing side expansion bus connector 32c is connected to the base side main bus connector 13b on the main base unit 1 and the base side expansion bus connector 22b on the sub base unit 2 at the same time. It is formed in a concave shape in cross section provided at a position retracted to the left side in the figure. This amount of retreat is the height or thickness of the sub base unit 2 when the sub base unit 2 is mounted on the main base unit 1.

FIG. 5 is a sectional view showing a correspondence relationship between connectors when the processing unit 3c shown in FIG. 4 is mounted on the main base unit 1 and the sub base unit 2 shown in FIG.

As shown in the figure, the main base unit 1
The sub-base unit 2 is mounted on the upper side of the base-side expansion bus connector 22b on the sub-base unit 2.
However, the processing side expansion bus connector 32c on the processing unit 3c side is the processing side main bus connector 32c on the left side of the drawing from the base side main bus connector 13b on the main base unit 1 by the height of the sub base unit 2. The processing side main bus connector 31c and the processing side expansion bus connector 32c are simultaneously connected to the base side main bus connector 13b and the base side expansion bus connector 22b, respectively, because they are retracted to the left side of the drawing from the connector 31c in the figure. It will be.

Therefore, the processing unit 3c is simultaneously connected to the main bus 11 of the main base unit 1 and the expansion bus 23 of the sub base unit 2, and both the main bus 11 and the expansion bus 23 can be supported.

Therefore, according to the first embodiment, the sub-base unit 2 having the expansion bus 2 is mounted on the main base unit 1 having the conventional structure, and a new expansion bus-compatible new sub-base unit 2 is mounted. Since the processing unit can be installed, the main base unit 1 with the conventional structure
Can be used as it is, the cost can be reduced, and the processing unit corresponding to the expansion bus can be easily supported.

The shape of the sub-base unit 2 is such that the position fixing connector 21 is not provided on the rear surface of the sub-base unit 2 and faces the base main bus connectors 13a to 13c on the main base unit 1. Since the structure is notched, when the sub base unit 2 is mounted on the main base unit 1, the base main bus connector on the main base unit 1 does not come into contact with the sub base unit 2, and the sub base unit 2 The mounting height of 2 can be minimized.

Further, as shown in FIG. 4, the processing side main bus connector 31c and the processing side expansion bus connector 32c.
Of the processing unit 3c that is compatible with both the main bus 11 and the expansion bus 23,
The main base unit 1 has a horizontal cross section that is recessed from the processing-side main bus connector 31c.
The upper base main bus connector 13b and the sub base unit 2 mounted on the main base unit 1
It can be connected at the same time as the upper base-side expansion bus connector 22b, and can also be mounted on the main base unit 1 where the sub-base unit 2 is not provided and can be connected to the main bus 1.

Next, another structure of the sub base unit 2 of the first embodiment will be described.

6A to 6C show another structural example of the sub base unit.

The sub base unit 4 shown in (a) is an example in which the position fixing connector 41a for one slot is provided on the back surface and the base side expansion bus connectors 42a to 42c for three slots are provided on the front surface. Therefore, in this sub-base unit 4, one processing unit 3b shown in FIG. 3B that supports only the expansion bus can be attached to the base-side expansion bus connector 42a, and is shown in FIG. 4 that supports both the main bus and the expansion bus. Two processing units 3c can be attached to the base-side expansion bus connectors 42b and 42c.

The sub-base unit 5 shown in (b) is an example in which position fixing connectors 51a and 51b for two slots are provided on the back surface and base side expansion bus connectors 52a to 52c for three slots are provided on the front surface. Therefore, the sub-base unit 5 shown in FIG.
Two processing units 3b shown in FIG. 3B can be attached to the base-side expansion bus connectors 52a and 52b, and the processing unit 3 shown in FIG.
One b can be attached to the base-side expansion bus connector 52c.

Here, comparing the sub-base unit 4 shown in (a) with the sub-base unit 5 shown in (b), the sub-base unit 5 shown in (b) is located at the position corresponding to the main base unit 1 and two slots. Fixing connector 51
Since they are connected by a and 51b, the connection strength between the sub base unit and the main base unit 1 is stronger than that of the sub base unit 4 shown in (a) by one slot, and the main base unit 1 and the sub base unit 2 are connected. There is less misalignment of slots between and.

The sub-base unit 6 shown in (c) is an example in which position fixing connectors 61a to 61c for three slots are provided on the back surface and base side expansion bus connectors 62a to 62d for four slots are provided on the front surface. Therefore, this sub-base unit 6 corresponds to only the expansion bus in FIG.
It is possible to mount three processing units 3b shown in (b), and it is possible to mount only one processing unit 3c shown in FIG. 4 that is compatible with both the main bus and the expansion bus.

Therefore, as is apparent from FIGS. 6 and 1, the sub-base units 2, 4 to 6 can be formed in arbitrary slot lengths according to the length of the expansion bus that the user wants to use, and The main base unit 1 can be mounted in any slot on the conventional main base unit 1.
The expansion bus can be provided without being restricted by the slot positions of other processing units mounted on the expansion unit and without restricting the degree of freedom of the slot positions.

Next, the sub-base unit according to the present invention,
The structure of the second embodiment of the PLC will be described.

Sub-base unit 7 of the second embodiment
Is different from the sub-base units 2 and 4 to 6 of the first embodiment only in the configuration of screw holes (see FIG. 1) serving as unit fixing holes to be mounted.

FIG. 7 shows the structure of the sub-base unit 7 of the second embodiment, together with the main base unit 1 and the processing unit 3b compatible only with the expansion bus.

At the upper and lower ends of the sub base unit 7,
A U-shaped bent unit mounting portion 74 is provided, and a through hole 74a for connecting the screw hole 14 of the main base unit 1 and the fixing screw 74a 'is provided on the rear side of the unit mounting portion 74. In addition, the fixing screw 3b of the processing unit 3b mounted on the sub base unit 7 is provided on the front side of the unit mounting portion 74.
There is provided a screw hole 74b for coupling with ???

FIG. 8 shows a detailed exploded perspective view of the unit mounting portion 74 of the sub base unit 7 of the second embodiment.

The mounting portion 74 of the sub-base unit 7
Is a bent portion 7 on the sub base unit 7 provided with a through hole 74a for connecting the screw hole 14 of the main base unit 1 with the fixing screw 74a 'as shown in the figure.
A retaining plate 74 ″ provided with a screw hole 74b for coupling with the fixing screw 3b ′ of the processing unit 3b is attached to the screw 4 ′.
It is fixed by 4 '''.

The structure of the unit mounting portion 74 is not limited to the detailed structure in which the fastening plate 74 "shown in FIG. 8 is fixed by the screw 74 '", and the unit mounting portion 74 is integrated with the sub base unit 7. Alternatively, the unit mounting portion 74 may be configured by a spacer or resin member that is threaded.

Therefore, according to the second embodiment, the through holes 7 for coupling with the main base unit 1 are provided on both sides of the unit mounting portions 74 at the upper and lower ends of the sub base unit 7.
4a and the screw hole 74b for fixing the processing unit 3b mounted on the sub-base unit 7 are provided, so that the main base unit 1 can be securely connected and the processing unit can also be reliably mounted at the same time.

In the above first and second embodiments, the position fixing connector 21 is for fixing the slot position mechanically connected to the base main bus connector 13a on the main base unit 1. However, the present invention is not limited to this, but the electrical connection, that is, the position fixing connector 21 can be taken out from the signal line on the main bus 11. With such a configuration, the signal line may be connected between the position fixing connector 21 and the base side expansion bus connector 22a.

That is, for example, the position fixing connector 21
Is configured to take out only the power supply line from the signal line on the main bus 11, and the power supply line is connected to the position fixing connector 21.
Can be connected between the base expansion bus connector 22a and the like.

In the case of such a configuration, power is supplied from the main bus 11 to the expansion bus 23 via the processing unit 3c (see FIGS. 4 and 5) which can be simultaneously mounted on the main base unit 1 and the sub base unit 2. It is not only necessary to supply power, etc., and it is not necessary to mount a power supply unit on the sub-base unit 2, but it is also easy to strengthen the power supply line and power capacity to strengthen the noise resistance of the sub-base unit 2 itself. Can be done.

As a result, in the case of such a configuration,
This is very effective when a processing unit that consumes a large amount of electric power is mounted or when a large number of processing units are mounted on the sub-base unit 2 and the number of slots is increased.

In other words, in the case of not having such a configuration, it is necessary to supply power from the main bus 11 to the expansion bus 23 via the processing unit 3c which can be simultaneously mounted as described above. In the power supply via the unit, the power capacity on the sub-base unit 2 becomes small,
This is because there is a possibility that a processing unit that consumes a large amount of power or a large number of processing units cannot be mounted on the base unit 2.

Further, the position fixing connector 21 is constituted by a through-type connector on which the processing unit can be mounted on the front side and which is electrically connected to the base main bus connector 13a on the main base unit 1 and the like. Then, the position fixing connector 21 may be configured to take out all the signal lines from the signal lines on the main bus 11.

In the case of such a construction, on the front side of the sub-base unit, the through connector connected to the main bus 11 is projected on the upper stage, and on the base side connected to the expansion bus 23 in the middle stage of the same slot. Since the expansion bus connector 22a and the like are provided, the shape of the mounting surface side of the processing unit corresponding to both the main bus 11 and the expansion bus 23 is recessed at the position where the base-side expansion bus connector is provided as shown in FIG. It is not necessary to make the shape recede, and it can be formed flush.

[0063]

As described above, according to the present invention, the sub base unit having the expansion bus is mounted on the main base unit having the conventional structure, and the new processing unit corresponding to the expansion bus is mounted on the sub base unit. Since it is possible to do so, it is not necessary to newly provide a base unit with a built-in main base and expansion bus, and the main base unit of the conventional structure can be used as it is, so it is possible to support expansion bus compatible processing units at low cost, The expansion bus can be easily installed.

The shape of the sub base unit is such that the position fixing connector is not provided on the rear surface of the sub base unit, and the portion facing the base side main bus connector on the main base unit is cut out. As a result, when the sub base unit is mounted on the main base unit, the main bus connector on the base side on the main base unit will not come into contact with the sub base unit, and the mounting height of the sub base unit can be minimized. Will be possible.

Further, since the processing unit compatible with both the main bus and the expansion bus, which includes the processing-side main bus connector and the processing-side expansion bus connector, has a structure in which the processing-side expansion bus connector is retracted from the processing-side main bus connector, It can be connected at the same time as the base side main bus connector on the main base unit and the base side expansion bus connector on the sub base unit mounted on this main base unit, and it can support both main bus and expansion bus. Become.

The sub-base unit can be formed in any slot length according to the length of the expansion bus that the user wants to use, and can be mounted in any slot on the conventional main base unit. The expansion bus can be provided without being limited to the slot positions of other processing units mounted on the unit and without restricting the degree of freedom of the slot positions.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a schematic structure of a first embodiment of a sub-base unit according to the present invention and a PLC using the sub-base unit.

FIG. 2 is an explanatory view showing a state in which a sub base unit is attached to the main base unit.

3 (a) and 3 (b) are explanatory views showing the appearance of a processing unit mounted on one of a main base unit and a sub base unit.

FIG. 4A and FIG. 4B are explanatory views showing an external appearance and a cross section of a processing unit corresponding to both the main bus and the expansion bus, respectively.

FIG. 5 is an explanatory view showing a cross-sectional view of a correspondence relationship between connectors when a processing unit is mounted.

6 (a) to 6 (e) are explanatory views each showing an example of another structure of the sub base unit.

FIG. 7 is an explanatory view showing a structure of a sub-base unit according to the present invention and a PLC using the same according to a second embodiment.

FIG. 8 is an explanatory diagram showing a detailed exploded perspective view of a mounting portion of the sub-base unit of the second embodiment.

[Explanation of symbols]

 1 Main Base Unit 11 Main Bus 12a, 12b, 12c Slots 13a, 13b, 13c Base Main Bus Connector 2, 4-7 Sub Base Unit 21 Position Fixing Connector 22a, 22b Base Expansion Bus Connector 23 Expansion Bus 3a, 3b , 3c Processing unit 31a, 31c Processing side main bus connector 31b, 32c Processing side expansion bus connector

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[Procedure amendment]

[Submission date] June 28, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 6

[Correction method] Change

[Correction content]

6 (a) to 6 (c) are explanatory views each showing an example of another structure of the sub-base unit.

Claims (8)

[Claims] 1. A sub-base unit which is mounted together with various processing units on a base-side main bus connector provided for each slot on the main base unit and which is connected to the various processing units via a main bus. A position fixing connector that is connected to the base side main bus connector is provided on the back side, and a plurality of base side extension bus connectors that include the extension bus and are connected to the extension bus are provided on the front side. It is a sub-base unit characterized by 2. The position fixing connector is a through-type connector to which a processing unit can be attached on the front side and which is also electrically connected to a base side main bus connector on a main base unit. The sub-base unit according to claim 1, which is characterized in that 3. The position fixing connector is provided corresponding to the base main bus connector for each slot on the main base unit, while the plurality of base expansion bus connectors do not overlap with the base main bus connector. The sub-base unit according to claim 1 or 2, wherein the sub-base unit is provided at a position for each of the slots. 4. The position fixing connector is provided corresponding to the base main bus connector for each slot on the main base unit, while the plurality of base expansion bus connectors do not overlap with the base main bus connector. Each position is provided with each slot and more than the number of position fixing connectors, there is no position fixing connector on the back side, and the part facing the main bus connector on the base side on the main base unit is notched. The sub-base unit according to claim 1 or 2, wherein: 5. The main base unit is fixed at a position corresponding to holes for fixing various processing units and sub-base units provided on the upper and lower ends of each slot on the main base unit on the back side. And a hole for fixing the processing unit is provided on the front surface side of that position. 4. The claim 1, claim 2, claim 3, or claim 3. 4. The sub-base unit described in 4. 6. The position fixing connector is provided with a power supply pin connected to a power supply line of a main bus on the main base unit, and the power supply pin is connected to a power supply pin in a base side expansion bus connector on the front side, The sub-base unit according to claim 1, claim 2, claim 3, claim 4, or claim 5, wherein a power line of the main bus and a power line of the expansion bus are connected. 7. A programmable controller using the sub-base unit according to claim 1, claim 2, claim 3, claim 4, claim 5, or claim 6. 8. The processing unit includes a processing-side main bus connector connected to a base-side main bus connector on the main base unit, and a processing-side expansion bus connector connected to a base-side expansion bus connector on the sub-base unit. The processing-side main bus connector and the processing-side expansion bus connector have a base-side main bus connector on the main base unit and a base-side expansion bus on a sub-base unit mounted on the main base unit, respectively. The processing-side expansion bus connector is provided at a position retracted from the processing-side main bus connector by the height of the sub-base unit so as to be connected simultaneously with the connector. Programmable controller.