Electrical apparatus including a bus conductor section

[0002] Field of the Invention

[0003] A terminal block assembly includes a terminal block containing a first opening for receiving a printed circuit board, and a second opening for removably receiving an internal bus connector unit. The bus connector unit comprises a thin flat support plate that carries first conductor means arranged for connection with the power supply and monitoring signal conductors of the distribution system, and second conductor means arranged for connection with the electrical circuits on the printed circuit board.

[0004] Brief Description of the Prior Art

[0005] Modular control systems for automated commercial, industrial, and residential buildings are disclosed in the prior patents to Eggert, et al., U.S. Pat. No. 5,615,079 and Glathe, et al., Pat. No. 5,722,862, both assigned to the instant Applicant. The use of interconnecting terminal block devices for such distribution systems is shown in the Zebermann, et al., U.S. Pat. No. 6,241,561, among others.

[0006] A bus conductor section for electrical equipment is known from the European patent No. EP 95 113 729 A2. The equipment, shown in this publication as the internal bus conductor section, is made as a continuous thin plate with strip conductors applied thereupon, In this equipment, terminal blocks that can be lined up next to each other on supporting rails are used for signal adaptation between a super-ordinate field bus and initiators, field units or the like that are connected to the connection blocks. The terminal blocks are made up of functionally different connection or module discs, such as protective conductor discs, feed discs, supply/signal conductor discs and catch foot discs. One or more connection blocks can be connected via the internal bus conductor with a connection module for the field bus.

[0007] Another bus conductor section is known from the European patent No. EP 00 100 303, wherein the bus conductor sections of the individual base terminal carriers are made structurally separate from each other, each having a thin plate through which passes at least one row of metal pins which are aligned on one side of the thin plate generally normal to the plate, and on the opposite side, essentially parallel to the thin plate, whereby the row of pins extending orthogonally relative to the thin plate is so dimensioned that its pin row ends can be used directly for contacting a socket terminal strip. The structural separation of the bus conductor sections of each module disc first of all offers the advantage of an almost random ability to line up also the bus conductor section with each other and thus enhances the versatility of the entire module system. Moreover, the chosen structural design of the bus conductor section with a thin plate and with angle pins of special length passing through the thin plate will offer the advantage of being able to omit the separate plug elements for contacting a separate equipment plug or an equipment plug molded upon an electronic printed circuit board.

[0008] Although the solution offered in the aforementioned European patent No. EP 00 100 303 proved effective, there is nevertheless the need for an optimization of the electrical equipment and its internal bus conductor for special cases of practical use in which a relatively large number of data and/or supply lines are provided in a very tight space. The object of this invention is to solve this problem.

[0009] Accordingly, a primary object of the present invention is to provide a generally rectangular terminal block containing a first opening for receiving a printed circuit board, and a second opening for removably receiving a replaceable internal bus connector unit carrying first conductor means adapted for connection with the voltage supply and monitoring and control signal lines of the system, and second conductor means adapted for connection with the electrical circuits of the printed circuit board.

[0010] According to a more specific object of the invention, the internal bus connector unit includes a thin support plate that is removably connected with the terminal block that carries the printed circuit board, the terminal block, together with the printed circuit board thereon, being transversely mounted on a support rail. First conductors on the thin support plate of one terminal block are adapted for connection with corresponding first conductors carried by an internal bus connector unit on an adjacent terminal block assembly arranged on the mounting rail.

[0011] According to another object of the invention, the first and second conductors carried by the thin support plate of the internal bus connector unit are arranged in superimposed rows of terminal strips, with the conductors being staggered to provide a large number of circuit connections. According to another feature of the invention, the terminal strips carrying the second conductors are vertically arranged in horizontal rows. In one embodiment, it has been proposed to mount one terminal strip row on the bottom edge of the printed circuit board. Thus, a large number of pins and conductors may be provided in an extremely simple manner, offering customer-tailored versatility (regarding the number of poles, shuntability, cross-connections, or the like).

[0012] In this way, this solution can also do justice to the most problematical individual cases of practical use with a need for a plurality of bus conductor data lines. Furthermore, along with the signal and supply line arrangement for the electronic printed circuit boards, one can also supply the field units via the internal bus conductor. Compatibility to the module bus technique of the aforementioned European patent No. EP 00 100 303 can also be achieved here.

[0013] It is also possible in a simple manner to combine in several rows of connections various types of connections such as light transmitting conductor connections and metallic conductor with each other. Electronic means may be provided for the transmission of light on the printed circuit board in this case.

[0014] The fact that the connections can be lined up in many rows also makes it possible to vary the contact sizes without any problems. With the help of different contact sizes, one can adapt the bus conductor in this fashion without any problems to various current load capacity requirements. The soldering connections can be made in any desired fashion, for example, in a through-contacting manner and/or via the SMD [surface-mounted device] technology. One can also insert pole connectors in place of the socket terminal strips and pin strips.

[0015] Other objects and advantages of the invention will become apparent from a study of the following specification when viewed in the light of the accompanying drawings, in which:

[0016] FIG. 1 is a front perspective view of the terminal block assembly of the present invention;

[0017] FIG. 2ais a front elevation view of the terminal block assembly of FIG. 1, and FIG. 2bis a sectional view taken along line 2b-2bof FIG. 1;

[0018] FIGS. 3 and 4 are front perspective views of the internal bus connector unit of the present invention;

[0019] FIGS. 5a-5eare front elevation, left side, rear elevation, top and front perspective views of the internal bus connector unit, respectively; and

[0020] FIG. 6 is a front perspective view of the printed circuit board with the internal bus connection unit connected thereto.

[0021] Referring first more particularly to FIG. 1, the terminal block assembly includes a generally rectangular vertically arranged terminal block 2 that is formed of a suitable electrically-insulating synthetic plastic material. The bottom edge portion 6 of the terminal block contains a recess 3 defined between the spaced catch feet 4 by means of which a terminal block is transversely mounted on a mounting rail R, as is known in the art. In accordance with a characterizing feature of the invention, the terminal block 2 contains an opening 8 for receiving an internal bus conductor unit 10, as will be described in greater detail below. The upper portion of the terminal block contains a recess 12 that receives a vertically arranged printed circuit board 14 having electrical circuits thereon. The terminal bus conductor unit 10 includes contacts arranged for connection with the power supply conductors and the monitoring and control signal voltages that are present in the system for automated control of a commercial, residential, or industrial installation. The circuit board 14 is provided with electronic circuitry for processing and relaying the signals that are to be supplied to and from the printed circuit board. The bridge portion 26 of the terminal block contains a groove 28 for receiving the housing of electronic equipment, not shown. The terminal block 2 further includes, in addition to the bus conductor opening 8, a marking groove 54 for receiving one or two labels, openings 59 for receiving portions of the printed circuit board 14, and openings 44 for receiving the stabilizing jacks of the printed circuit board. A further recess 62 is provided for receiving coding elements.

[0022] Referring now to FIGS. 2aand 2b, the bus conductor opening 8 receives the bus conductor unit 10 shown more particularly in FIGS. 5a-5e. The bus conductor connecting unit 10 includes a vertical support plate 102 that comprises a suitable non-conductive plate formed of insulation material. On one side, the support plate 102 is provided with a male terminal strip 112 having rows of male contacts 104aand 104b. On its other side, the thin support plate 102 carries a female terminal strip 110 which contains rows of female contacts 106aand 106baligned with the male contacts 104aand 104b, respectively. These contacts 104a, 104b, 106a, and 106bare arranged for connection in the distribution bus portion of the system that carries the power supply voltages as well as the monitoring and control signal voltages of the automated system. The front face of the support plate 102 also carries a second set of conductors 108aand 108bthat are associated with terminal strips 118aand 118b, which are mounted in side-by-side relation as shown in FIG. 5b. The conductors 108aand 108bare vertically spaced to afford maximum number of contacts within a very limited space.

[0023] Referring to FIG. 6, it will be seen that the terminal strips 118aand 118bare adapted for connection with terminal strips 120aand 120b, respectively, that are supported by the bottom edge of the printed circuit board 14. The terminal strips are provided with two sets of conductors 122aand 122bthat are connected with various circuits of the printed circuit board, respectively. In order to effect connection between the first conductors 104a, 104band 106a, 106bwith the second set of conductors 108aand 108b, selected jumper connections J1 and J2 (FIG. 5c) are provided as desired. These jumper connections may be provided on the internal bus connector unit 10 prior to assembly of the unit with the terminal block 2, if desired.

[0024] It will be noted that the thin plate 102 is generally parallel with the electronic printed circuit board of the connection module. Essentially, it is positioned in the plane of the electronic printed circuit board 14 along the latter's main axis and directly adjoins and is contiguous with the electronic printed circuit board 14, as shown in FIG. 2b.

[0025] The connections of the internal bus conductor leading to neighboring module discs are formed by a double-row terminal strip 110 and a double-row terminal strip 112 where, in case of adjoining base terminal carriers 2, the terminal strip 112 engages the terminal strip 110 of bus conductor section 10 of the particular neighboring base terminal block 2. Pole connectors can also be put in to take the place of socket terminal strips and pin strips.

[0026] This double-row arrangement can also be implemented by a single pole connector if there is no need for any adjustment of single and/or supply lines.

[0027] As one can furthermore see in FIG. 2b,thin plate 102 can be inserted in opening 8 of base terminal carrier 2, which opening can be covered by a cover member 114 which, in turn, contains an opening 116 for the at least two superposed rows of connections to the neighboring module disc, together with a guide means 117 that engages a corresponding recess 119 of the adjacent terminal block mounted on the mounting rail R.

[0028] A double-row terminal strip means 118 includes a pair of laterally stacked terminal strips 118aand 118b.This double-row terminal strip is used for contacting a likewise double-row terminal strip 120 on electronic printed circuit board 14. This arrangement should be construed in a purely exemplary manner and can also be done in reverse (i.e., by providing the terminal strip on thin plate 102).

[0029] If only seven contacts are needed to the electronic printed circuit board 14, then one might also visualize a single-row-contact strip, something that naturally is particularly cheap.

[0030] Furthermore, as an alternative, one can also provide one contact strip on each side of the electronic printed circuit board 14.

[0031] According to a further alternative, connections 108 to relay the bus conductor signals and/or bus conductor supply voltages between the internal bus conductor 10 and the printed circuit board 102 only represent contact surfaces as strip conductors along the edge of the electronic printed circuit board 14 and are connected via a printed circuit board edge connector on the electronic printed circuit board 14.

[0032] In case of a combination of a module disc with a terminal block, it is possible—at least in the area of the first module disc of the module block—to connect a contact of the internal bus conductor in the manner of the first module disc and the additional module disco of the block via a flat-positioned printed circuit board, for example, in the manner of German patent No. DE 44 38 801.

[0033] While in accordance with the provisions of the Patent Statutes the preferred forms and embodiments of the invention have been illustrated and described, it will be apparent to those skilled in the art that various changes may be made without deviating from the inventive concepts set forth above.