Abstract:
A terminal block and removable electronic module assembly is provided having a movable disconnect member that is displaceable relative to the module between engaged and disengaged positions in which an electronic component carried by the module is electrically connected and disconnected, respectively, relative to terminals carried by the terminal block member. When the disconnect member is in the disconnect position, the electronic module may be tested by a test plug external of the module housing.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     This invention relates to electrical connector terminal block means including a terminal block, an electronic module removably mounted on the terminal block, and a disconnect member that is movable between engaged and disengaged positions relative to the module to electrically connect and disconnect an electronic component within the module from one or more terminals on the terminal block. 
     2. Brief Description of the Prior Art 
     As shown by the German patent No. DE 41 21 836 C2, it has been proposed in the prior art to provide an electrical connector terminal block with disconnect means located in the upper area of the module. It is thus clearly visible from above the wiring plane of the terminal block, but this arrangement requires that portions of the internal bus bar connecting means must run upwardly and outwardly an appreciable distance from the terminal block connectors. One must create a rather complex disconnect point for exclusively performing this disconnect function, and depending on the layout, one must provide plug connections in the housing of the module for receiving the test plug means. 
     The present invention was developed to avoid the drawbacks of the prior art and to improve the module disconnecting and testing operations with the least possible structural effort and with minimal space requirements. 
     SUMMARY OF THE INVENTION 
     Accordingly, a primary object of the invention is to provide an improved connector terminal block and electronic module assembly including disconnect means that are movably connected with the module housing for displacement between engaged and disengaged positions in which the module is engaged with terminals on the terminal block, and disengaged for testing by separate test plug means, respectively. Because the disconnect means now lies in the plug connection zone of the electronic module, the need of separate busbars that lead to a disconnect point and the like is avoided, especially since this disconnect means at the same time also performs plug connector functions for the electronics module and, by the way, also directly by itself makes it possible to plug the test plug in for the purpose of testing the electronic circuits and components of the module. When the electronic module is plugged in the terminal block and the disconnect means is in its closed position, an electrical plug connection at this point between the electronic module and the connecting terminal block is assured. When in the disconnect position, the electrical connection to the connecting terminal block is interrupted at this point and, by plugging the test plug into the disconnect means, one can perform the desired testing of the electronics in the module. When the electronic module is removed, the disconnect means continues to be fastened to the electronic module because it is retained on it. 
     According to a preferred embodiment of such a terminal connector block, there is provided a locking means that is operable between the disconnect means and the housing of the electronic module and that can be activated when the disconnect means is in the disengaged position by plugging the test plug in. In this way, one can reliably ensue that the disconnect member--perhaps as a result of plugging the test plug in for testing purposes--will not perhaps be forced back again into the engaged position. 
     According to another embodiment, the disconnect member, at least in one segment, extends along a lower outside-wall sector of the electronic module in the height direction and, in the lower terminal sector facing toward the connecting terminal block, carries the plug connectors of the electronic module. For this purpose, the plug connectors in the connecting terminal block are placed with regard to the electronic module relatively far outside so that the plug connectors can cooperate. This results in the advantage that using the connecting terminal block, one can use electronic modules with the disconnect means or electronic modules featuring a broader design without the disconnect means. 
     In another practical embodiment, the test plug connections are located in the top portion of the disconnect member. In this upper area, the separating piece can also be made in the form of a gripping means. In this way, one can achieve a sufficient interval toward the wiring level of the connecting terminal block so that the disconnect means will remain clearly visible and easy to handle and so that the testing plug can also be inserted in the separating piece in an easy and comfortable way, especially since said disconnect means will then after all be in the upper disconnect position. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     Other objects and advantages of the invention will become apparent from a study of the following specification when viewed in light of the accompanying drawings in which: 
     FIG. 1 is a sectional view of the assembly including the connector terminal block, the electronic module, and a pair of disconnect means in the engaged and disengaged positions, respectively; and 
     FIG. 2 is a detailed sectional view of the right hand disconnect means of FIG. 1. 
    
    
     DETAILED DESCRIPTION 
     Referring first more particularly to FIG. 1, the terminal block assembly means 1 includes a connector terminal block body 2 formed of a suitable synthetic plastic insulating material, which body supports at its opposite ends a pair of main terminals 4, 4&#39;. Arranged on the terminal block body 2 between these main terminals are a pair of auxiliary terminals 6, 6&#39; that are connected with the main terminal by busbars 5 and 5&#39;, respectively. Removably mounted on the terminal block body 2 is an electronic module 7 including a hollow housing 8 which contains electronic components, such as a pair of printed circuit boards PC1 and PC2. Mounted for sliding movement on opposite side walls 8a and 8b of the housing 8 are a pair of disconnect means 9 and 9&#39; associated with the auxiliary terminals 6 and 6&#39;, respectively. Each of these disconnect members is vertically slidably movable relative to the associated sidewall 8a and 8b and associated auxiliary terminals 6 and 6&#39;, respectively. More particularly, the disconnect members include internal and external portions 9a, 9b and 9a&#39;, 9b&#39; that are spaced to defined gaps 21 (FIG. 2) for receiving the lower extremities of the associated side wall 8a and 8b, respectively. As best shown in FIG. 2, the internal and external portions of the disconnect members 9 and 9&#39; include hooks 24 and 24&#39; that extend within corresponding recesses 22 and 22&#39;, and catches 25 and 25&#39; that extend into corresponding recesses 23 and 23&#39; thereby to maintain the disconnect member 9&#39; in its engaged position illustrated in FIG. 2. These disconnect members are slidably mounted on the housing 8 of the electronic module 7 thereby to avoid loss of the disconnect members. 
     As shown in FIG. 2, the disconnect members carry at their lower ends a bridging terminal 10 that affords communication between the auxiliary terminal 6&#39; and wiring on the printed circuit board PC2 via downwardly extending male terminal portion 10b that is arranged for insertion within the female auxiliary terminal 6&#39;. The terminal 10 also includes an upwardly directed test portion 10c, and a second downwardly directed bridging portion 10d that engages the adjacent surface of the printed circuit board PC 2. Thus, current from conductor C 2  is supplied to printed circuit board PC2 via main terminal 4&#39;, busbar 5&#39;, auxiliary terminal 6&#39;, and the bridging terminal 10. Similarly, at the other end, current from conductor C 1  is supplied to printed circuit board PC1 via main terminal 4, busbar 5, auxiliary terminal 6, and bridging terminal 10. 
     In accordance with an important feature of the invention, when the disconnect member 9, 9&#39; is raised to the disengaged position of FIG. 2, the test plug 12 may be inserted within the bore 11 contained in the top of the disconnect member 9&#39; into electrical engagement with the upwardly extending portion 10c of the bridging terminal 10, as shown in FIG. 2. In order to prevent downward movement of the disconnect member 9&#39; from its illustrated upper disengaged position by the test probe 121, a resilient locking member 26 is provided having an outwardly directed projection that is forced into a corresponding locking recess 27 contained in the housing wall 8a. Furthermore, owing to the spacing distance between the main terminals 4 and 4&#39; and the auxiliary terminals 6 and 6&#39;, it is possible to test the busbars 5 and 5&#39;, respectively by test plugs 31 and 31&#39; that extend downwardly within corresponding openings 30 contained in the connector terminal body. 
     A plurality of the terminal block bodies may be mounted on the support rail R in side-by-side manner as is conventional in the art. Successive terminal block assemblies may be connected by transverse connecting bars 28 and 28&#39; that extend between the connector terminal blocks. 
     By arranging the auxiliary terminals 6 externally of the housing of the electronic module 7, the terminal block may be equipped with other electronic modules without the use of separate disconnect means. These electronic modules would then be so wide that the functional ends of the printed circuit boards could be inserted directly within the auxiliary terminals 6 and 6&#39;, respectively. It is, of course, possible to provide an assembly having only one disconnect member, or to afford connections between the auxiliary terminals 6 and 6&#39; via conducting means arranged in the module housing 8. 
     The disconnect members are provided at their upper ends with extensions 9c and 9c&#39; that may be engaged by a suitable tool (such as a screwdriver) for elevating the disconnect members from their engaged positions toward their disengaged positions. The height of the disconnect members is such as to insure clear visibility and accessibility to the upper disconnect piece and for also supporting the wiring level of the connecting terminal block. Thus, one may test the disconnect means in spatial terms that are shifted laterally to corresponding connections 30&#39;. 
     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 various concepts set forth above.