Switching apparatus with radio module and deactivation function

A switching apparatus has a switching device and a radio module. The radio module is provided for the purpose of making available a piece of information about an operating state of the switching device in wirelessly retrievable fashion. The switching apparatus is distinguished at least in that the switching apparatus has a manual operating element that can be used to physically deactivate the radio module.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a U.S. National Stage application under 35 U.S.C. § 371 of International Application No. PCT/EP2013/065844, filed on Jul. 26, 2013, and claims benefit to German Patent Application No. DE 10 2012 106 923.9, filed on Jul. 30, 2012. The International Application was published in German on Feb. 6, 2014, as WO 2014/019963 A1 under PCT Article 21(2).

FIELD

The invention relates to a switching apparatus having a switching device and a radio module.

BACKGROUND

Normally the radio model is used for monitoring or controlling the switching device. A person who is equipped with a suitable receiving device can retrieve the available information without having to come into direct contact with the control apparatus. A complex structure of a wired bus system can be omitted. Moreover, in an emergency an appropriate message can be transmitted automatically to the receiving device using the radio module and the competent person can therefore be reached irrespective of where they are.

A switching apparatus of this kind is described in DE 10 2004 002 330 A1. The switching device of the switching apparatus is arranged in a control cabinet. A radio interface is connected to the switching device and is provided for the purpose of exchanging information regarding the operating state of the switching device with an appropriate radio interface of the receiving device.

In particular, the switching apparatus disclosed in DE 10 2004 002 330 A1 is permanently able to communicate. This is, however, associated with disadvantages. The radio module that is permanently able to communicate can be manipulated by unauthorised access. For example, data stored in the radio module could be read wrongfully. Moreover, the communication between the radio module and the receiving device could be followed. Critical malfunctions of the switching apparatus could be brought about by access to the data transmission or the radio module respectively. The security of the switching apparatus and in some circumstances a whole system connected to the switching apparatus is thus compromised.

SUMMARY

An aspect of the invention provides a switching apparatus, comprising: a switching device; a manual operating element; and a radio module. A piece of information about an operating state of the switching device can be retrieved wirelessly using the radio module. The manual operating element is configured to physically deactivate the radio module.

DETAILED DESCRIPTION

An aspect of the invention is to improve the IT security of the switching apparatus of the type in question.

An aspect of the invention provides a switching apparatus having a switching device and a radio module. The radio module may be provided for the purpose of making available a piece of information about an operating state of the switching device in wirelessly retrievable fashion.

The switching apparatus according to the invention is accordingly characterized in that the switching apparatus comprises a manual operating element that can be used to physically deactivate the radio module. According to the invention, therefore, the radio module only provides operating information regarding the switching device in a wireless fashion until the radio module has been put out of operation (deactivated). The physical deactivation should be taken to mean that the radio module is switched off, for example by means of a mechanical or galvanic interruption of a suitable power line. A switching of the radio module by means of programming technology is also feasible, for example by setting a bit/control pin provided for the purpose, as a result of which an internal switch of the radio module suitable for deactivating the radio module is operated. If the radio module is switched off in this manner there is no possibility of receiving information about the switching device via the radio module.

According to the invention, the radio module can be deactivated by means of a manual operation of the operating element. By configuring the operating element in a manner that is suitable for manual operation, for example in the form of a pushbutton, a rotary knob, a switch lever or the like, it is ensured that the deactivation cannot be performed by means of external, unauthorised access by means of software technology. The user can therefore decide himself whether or not the switching apparatus can be reached by means of wireless communication.

According to an embodiment of the invention, the deactivated radio module can likewise be brought, by means of the operating element, back into an active operating state, in which data transmission of the operating information of the switching device can take place.

An additional advantage of being able to physically deactivate the radio module is that the energy consumption of the switching apparatus can be reduced by deactivating the radio module.

According to an embodiment of the invention, the radio module is designed as an external unit. In this embodiment, the radio module can be arranged separately from the switching device, for example at a place that is suitable for wireless communication. The radio module is designed such that it can be connected to the switching device in order to facilitate the exchange of data between the radio module and the switching device. The connection can be wired or wireless. It can, for example, be achieved in the form of an Ethernet cable or another suitable type of connection.

Furthermore, the radio module can be designed such that it is suitable to receive and/or process a control signal transmitted by a transmitter and/or to relay a control signal to the switching device. The switching apparatus can thus not only be monitored in a wireless manner but also controlled in a wireless manner.

Bluetooth or another accordingly suitable radio standard can be used for communication between the radio module and the receiving device/transmitter. The radio module can also comprise a WLAN interface or a comparable interface. The receiving/transmitting device can, for example, be achieved by a smartphone, tablet PC, pager or a similar device having the appropriate programming.

It can be advantageous if the information about the operating state of the switching device can then also be provided by the radio module when the switching device is tripped or is subject to a malfunction. In the event of tripping, for example overload tripping, and/or malfunction, an energy supply of the switching device is interrupted in some circumstances. Therefore, the radio module can be equipped with an energy supply, which is independent of the energy supply of the switching device. This can be provided, for example, by means of a separate GND/+24 V DC connection on the radio module. If the energy supply of the switching device fails, the radio module can continue to be supplied with energy, for example electricity, by the separate energy supply. Furthermore, the radio module can in this case continue to supply energy to the switching device via its own input energy supply and thus continue to retrieve data from the switching device that has been switched off.

According to a further embodiment of the invention, the radio module comprises a display element. The display element can be provided in order to present the information about the operating state of the switching device visually. The display element can comprise a multicolour LED, which is suitable for emitting light in different colours. The colour display of the display element can depend on an operating parameter of the switching device. For example, a green light colour can indicate a regular state of the switching device while a red light colour can signal a tripped state of the switching device or a malfunction. Furthermore, a static glow and/or glow that changes over time can be displayed. A flashing of the display element can, for example, indicate a predetermined operating state of the switching device. By using a wide spectrum of colours that can be shown by the display element, (for example from green via blue, yellow and orange to red) a display of the operating state that is intuitive to the human eye can be achieved in the process, in particular if it is combined with the brightness of the display changing over time.

In addition to the display element, the radio module can comprise a reference ring. The reference ring serves to visualise the dependency of the colour display of the display element on the operating parameter of the switching device. This illustration is intended to facilitate an interpretation of the signal emitted by the display element. The reference ring can be achieved in the form of an assignment, in tabular form, of colours to operating states. The reference ring can be achieved as a round or differently shaped, for example oval or square-shaped, perforated disc depending on the application, the disc containing the required information about the colour display and the assignment of the operating parameters in written and/or pictorial form. Moreover, the reference ring can be arranged in the direct proximity of the display element, for example over it, under it or behind it, such that the light signal displayed by the display element can be perceived together with the assignment information shown by the reference ring.

In order to improve the wireless communication between the radio module and the receiving device/transmitter, it can be advantageous to provide the radio module with an antenna, which is arranged behind the reference ring. As a result of this, the wireless retrievability of the operating information is not discernible to the human eye at first glance. According to one embodiment, the antenna is achieved in the form of an adhesive film. The antenna can be connected directly to the reference ring. In this manner the reference ring, which is produced from plastics material for example, can be installed by the user together with the antenna, which has already been stuck onto said ring. As a result of this, the user can save one work step (mounting of the antenna) and moreover, does not need to worry about a suitable arrangement of the antenna.

In some fields of application of the switching apparatus it can be advantageous for the switching apparatus to comprise a control cabinet having a control cabinet housing. The switching device is then arranged inside the control cabinet and is thus protected by the control cabinet housing. Since the wireless transmission out of the control cabinet can be impeded by the control cabinet housing, the radio module is arranged on the control cabinet housing. The operating element is accordingly arranged in an appropriate manner such that it can be operated from outside of the control cabinet. In this manner the operating element can be manually operated without access to the devices inside the control cabinet. Irrespective of the arrangement of the operating element, the display element can also be arranged in such a way that the display of the operating state of the switching device can be seen from outside of the control cabinet. According to a further embodiment, the antenna can be integrated in the radio module, for example on a circuit board of the radio module, the radio module being configured such that the radio signals of the radio module can be emitted through an opening in the control cabinet housing.

According to an embodiment of the invention, the operating element can comprise an illuminated pushbutton. The illuminated pushbutton can also perform the function of the display element in order to simplify the construction of the switching apparatus. The illuminated pushbutton can be designed such that it can be seen from a position of the illuminated pushbutton if the radio module is deactivated. For example, the illuminated pushbutton can comprise a pushbutton, which can be depressed manually or not depressed. The illuminated pushbutton can be configured in such a way that the radio module is deactivated if the push button is depressed and if the push button is not depressed the wireless data transmission by means of the radio module is possible. A reversed configuration is also feasible. In this manner it is apparent whether the radio module is deactivated or not and specifically, irrespective of the colour display of the illuminated pushbutton and of the display element respectively. In another variant, the illuminated pushbutton can indicate whether the radio module is deactivated by suitable other visual means, for example by means of an LED, or an audible signal. The illuminated pushbutton and the display element can, of course, also be achieved as separate parts having this function.

Furthermore, it can be advantageous for the operating element to be equipped with means which facilitate a resetting or acknowledgement of an operating state of the switching device. This additional function expands the field of application of the switching apparatus and can facilitate a rapid reaction to tripping and/or malfunctions during the operation of the switching apparatus and all devices associated therewith.

A switching apparatus1according to the invention is shown in detail inFIG. 1. The switching apparatus1comprises a control cabinet6having a control cabinet housing61. In the control cabinet6a switching device11is arranged such that the switching device is protected from external mechanical and electromagnetic effects by the control cabinet housing61. The control cabinet housing61is designed such that a radio transmission of data out of the control cabinet6to the outside is suppressed. The elements of the switching apparatus1that are located inside the control cabinet6are each sketched with a broken line inFIG. 1in order to illustrate their spatial arrangement.

Furthermore, the switching apparatus1comprises a radio module12, which is arranged on and fixed to the control cabinet housing61. In the process, the radio module12is designed as a separate unit and connected to the switching device11using a cable connection2such that an exchange of information between the radio module12and the switching device11is possible. The radio module12protrudes partially out of the control cabinet6.

The radio module12makes information about an operating state of the switching device11, which can be transmitted via the connection2, available for retrieval. A receiving device9can enter into a wireless connection, which is labelled inFIG. 1with a double arrow8, with the radio module12, and retrieve the information from the radio module. Moreover, the receiving device9can function as a transmitter and send signals, for example control signals, to the radio module12by using the wireless connection.

The radio module12is equipped with an energy supply3, which is independent of the energy supply of the switching device11, in order to ensure the operability of the radio module12in the tripped state of the switching device11. Moreover, the switching device11can continue to be supplied with energy in the tripped state by the energy supply3of the radio module12such that information about the operating state of the switching device11can still be retrieved in this case.

Furthermore, the switching apparatus1comprises an operating element13, which is integrated in the radio module12in this embodiment. The operating element13is designed in the form of a pushbutton. If the pushbutton is pressed it locks in a predetermined pressed position. In this position of the pushbutton the radio module12is in operation. Data transmission between the radio module12and the device9can be carried out. If the pushbutton is not depressed, the energy supply of the radio module12is interrupted and the radio module is thus deactivated.

A reference ring4is provided on the radio module12. The reference ring4has the form of a perforated round disc, which is arranged in direct proximity to the display element.

FIG. 2is a detailed partial view of the switching apparatus fromFIG. 1. Same or similar parts have been provided with the same reference numerals inFIGS. 1 and 2in the process.

InFIG. 2, the radio module12is shown in a transverse view, the radio module12being arranged on the control cabinet housing61such that it protrudes in part on the control cabinet. The radio module12has access to its own energy supply3as well as a cable connection2to the switching device11(not shown inFIG. 2).

Furthermore, a display element7is provided on the radio module12. The display element7(not visible inFIG. 1) comprises an RGB LED, which is incorporated into the operating element13. In the process, the operating element13is formed partly from transparent material such that the light emitted from the RGB LED is visible from outside. Moreover, the reference ring4is arranged in direct proximity to the display element7and is provided to illustrate the dependence of the colour display of the display element7on the operating state of the switching device11graphically in the form of an assignment table.

Furthermore, the radio module12comprises an antenna5, which is arranged in part between the reference ring4and the control cabinet housing61. The antenna is not visible to an observer located outside of the control cabinet6, since it is preferably fully covered by the reference ring4.

LIST OF REFERENCE NUMERALS