DE4341099A1 - Terminal apparatus for buildings systems technology - Google Patents

Abstract

The terminal apparatus has a data bus (12) formed of a network of leads. Bus coupling units (13) can be connected to the data bus (12). These units (13) each include a microprocessor to generate, transmit, receive and analyse data telegrams and to process received data telegrams into switch or key commands and to convert these commands into an analog or digital value. The coupling units (13) enable organised data telegram traffic. Each unit (13) is connected to a function specific application module via several internal communication lines and an application interface to generate function signals to send the telegram. The application module is a tri-state function unit (14,15,16) with at least one automatic transmitter (15,16) with a device socket (57) and a button (49) to provide the tri-state, and an automatic analyser (14) with a housing (24) to detect and analyse the tri-state. The analyser (14) is connected to each transmitter (15,16) via a two wire line (25,26,31,32). The analyser (14) and transmitter (15,16) form a current loop supplied by an ac source (35). The button (57) actuates a call device (36,39) which controls the ac source (35) on the basis of the current direction or amplitude or frequency.

Description

The invention relates to a connection device for the Building system technology with one built from a network ten data bus and bus coupling that can be connected to the data bus units, each containing a microprocessor, for Generation and sending of data telegrams, for receiving and Evaluate the data telegrams and process received ones Data telegrams in switching, key or query commands and for Convert the switching, key or query commands into one Analog or digital value, with the mentioned bus coupling units with each other an orderly data telegram traffic enable, and each bus coupling unit over several internal communication lines and a user interface with a function-specific user module unit is connected to the function-determining signals for transmission of the data telegrams are generated.

Such a data transmission system for the building system technology is known from DE 38 18 601 A1. Everyone is there Bus coupling unit with a user module unit via a User interface connected. The user module units, which, for example, the function of a switch or button can only meet later, after successful Installation of the bus coupling units with which Corresponding bus coupling unit. For this Purpose are electrical and mechanical connection means act, for example as electrical connectors or snap fasteners can be formed with which in In the case of a flush-mounted installation, the user module unit the support plate of the bus coupling unit is attached.

Such a combination of bus coupling unit and user The module unit is complex in that the aforementioned ones always have to be put together in pairs. Further the effort becomes even greater when the user module units are available in different designs. For the  Building installation is offered by manufacturers of installation materials usually several different program systems, For example, surface-mounted and flush-mounted programs, water protected and non-waterproof designs; Standard and Areas or luxury programs. Should the connection device for integrating the building system technology into the program systems mentioned are then technically identical User module unit in the design versions mentioned to keep in stock what a high economic and logistical effort required.

Through EP 0 452 658 A1 a connection device is the one gangs described type known, in which each bus coupling unit and each user module unit not in pairs must be asked. In the known connection device are some of the communication lines of the bus coupling unit connected to multiple user module units that communicate with the same bus coupling unit. The Busan coupling unit forms a basic module on which several preferably function-specific, user module units are closable, for example the function of a Push buttons, switches, dimmers, display devices or the like. In this embodiment, the effort is reduced of the bus coupling units, but not in relation to the previous ones design versions described above.

Furthermore, the connection device mentioned enables only Kombina tion of a bus coupling unit with several user modules units within a local combination with very short communication lines, for example as quadruple Combination by the housing of the individual devices leave it plugged in or by side by side or one below the other equipment.

DE 41 42 254 A1 is a circuit arrangement for an installation bus of building system technology known. With this circuit arrangement the state of binary sensor or monitoring contacts monitored, for example, have twilight  switches, ice detectors, glass break detectors, door and window contacts a simple binary switch contact like reed relay contact. The query of the switching status of a contact by the off evaluation of a YES-NO statement, d. H. Tension present or not, is not sufficient for other applications, namely where three specific states are to be generated, for example UP-STOP-DOWN for roller shutter controls or ON-0-OFF for switching of lamps or LIGHT-STOP-DARK to regulate the brightness of lamps or LEFT-OFF-RIGHT to control the direction of rotation of Engines. Accordingly, to perform these functions UP telegram, DOWN telegram or ON telegram, OFF telegram, LIGHT telegram, DARK telegram or LEFT telegram, RIGHT Telegram generated or received in the bus coupling unit, and in the user module unit for the corresponding function processed.

The object of the invention is to provide the connecting device device of the type described at the outset for generating three access would be fail-safe in such a way that their An area of application even in harsh operating conditions such as high Humidity, wide temperature range or installation in the Can be expanded outdoors. Furthermore, the user module receive standardized command devices, their installation, Fastening and assembly dimensions to those of conventional electrical Switch for building installation adapted in the way are that their actuation, cover, decoration and other components can be used and vice versa.

The task will be at a connector of the beginning type described by in the characterizing part of claim 1 measures implemented.

Developments of the invention are in the dependent claims wrote.

The connection device according to the invention can for example have a bus coupling unit, which is based on the DE-OS 40 00 623 has a housing that in an Installa  tion box (also flush-mounted box) can be accommodated. The Housing can have an edge recess on one side with contact elements have elements. For connecting the data bus line to the Bus coupling unit, a terminal block can be used the one with sockets for the contact elements and connecting ele is equipped for the incoming data bus lines. This allows the terminal block to be separated from the housing without the data connection to other bus coupling units separate.

The housing of the bus coupling unit can be connected to the contact elements opposite end of the housing a Kon Have clock bar that forms a user interface and for establishing communication links between the bus coupling unit and the user module unit.

The housing can be for a loose installation or for a detachable Attachment to be trained in the installation box and The box can be flush-mounted with an overtape cover be closed, so that the bus coupling unit as a whole disappears behind the wall surface.

The user module unit forms a trinary functional unit with a housing for an independent evaluation unit for the Use in an installation box (also flush-mounted box). The Housing has a connector on one side, for. B. Kon clock bar, which is used for the production of communication connections between the bus coupling unit (user interface position) and the trinary functional unit. At the, the Contact strip opposite, side of the housing of the off value unit there is a multi-pin terminal block for the Connection of several independent sensors.

The communication connections are established with a ribbon cable leading to the contact at both ends afford the bus coupling unit and evaluation unit has mental contact strips. The one with this other connected housings can each be in a flush-mounted box  loosely used and the flush-mounted boxes with overtape lids be closed, so that both housings in total behind the Wall surface disappear.

To get short communication lines, the Installation boxes arranged immediately adjacent to each other and be connected to each other by empty pipes. In this case the ribbon cable can first be drawn into the cans and then the electrical connection Plug the complementary contact strips onto the bus coupling unit and to the evaluation unit. The thus manufactured electrical unit can finally by the Connection of the data bus line to the bus coupling unit and by connecting several encoders using two-core Connection cable to the terminal block of the housing of the ejector unit can be completed.

The function-determining user module unit as a trinary Functional unit generates trinary states that are about the user interface (ribbon cable) to the bus coupling unit.

The functional unit consists of the independent one Evaluation unit for evaluating the trinary states, several re parallel two-pole inputs in the form of the already described benen terminal block and each of a two Core signal line can be connected to the evaluation unit independent donors with whom the trinary states, at for example ON, INACTIVE, OFF generated and via the respective two-wire signal line to the evaluation unit the. The ON, INACTIVE and OFF states can be determined by a generates positive current, no current and a negative current become. By creating trinary states and evaluating them Processing and transmission via the data bus is always desirable Execute the function of the actuator with the help of data telegrams bar, which cannot be achieved with the help of binary inputs. Through the inventive design of the user module unit can be long distances between the installation locations  bridge the evaluation unit and the respective encoders, because this type of data transmission insensitive to interference and with a simple means. During the data bus and its module units, such as bus coupling units, right sensitive to major temperature fluctuations or moisture react, for example the data telegram traffic in the Winter between one outdoors and one inside a ge heated bus coupler unit installed in the room can such sensitivities occur between the one in the Inside a heated room to the bus coupling unit closed evaluation unit and one via the two-wire line with an encoder installed outdoors, even at high Minus temperatures do not rise, d. H. there are no disturbances the signal transmission. By the user according to the invention module unit is a potential-free signal transmission between between the sensors and the evaluation unit. Thereby, that the user module unit is divided into independent The encoder and in an independent evaluation unit, the user can area of a connection designed for indoor use facility system technology will be expanded to include Outdoor area, for example by the indoor area in installed bus coupling unit the evaluation unit over short Lines are connected and possibly several outdoors installed encoders to the evaluations via very long cables unit are connected. Up to four encoders are advantageous can be connected to an evaluation unit, which allows up to three Have bus coupling units saved.

By using two-wire lines instead of three wire lines can reduce the amount of wiring.

Advantageously, in the training according to the invention Current direction selector used with simple Means a reliable generation, transmission and off evaluation enabled.

To generate the trinary states with the help of the encoder is in the evaluation unit has an AC voltage source  by transformer coupling circuits of the evaluation unit and feeds the sensors via the two-wire lines. That’s why Electrical circuits galvanically decoupled from the AC voltage source pelt. In each encoder there is a first one in the circuit Series connection, consisting of one as opener or closer trained switch contact and a diode and a second Series connection, consisting of NC or NO and diode, the two diodes are polarized in opposite directions.

Instead of the current direction evaluation, a Amplitude evaluation carried out with an evaluation resistor with the evaluation resistor in series with the Primary winding of the transformer on the AC voltage source lies. On the secondary side of the transmitter is the two-wire line and at the end the amplitude selector is connected sen. The amplitude selector contains at least one Resistor connected to a wire of two-wire line and with the other connection to a connection of the Switch contact is connected, the other connection with the second wire of the two-wire line is connected.

When the switch contact is open, the resistance at the output is Secondary side of the transformer is infinite, which is zero volts above that Evaluation resistance corresponds. Can in the evaluation unit this value can be assigned to the INACTIVE state.

When the switch contact is closed, the resistance is in parallel to the secondary side of the transformer. The resistance value will preferably chosen so that the current through the evaluation resistor generates a voltage drop that is the size of the half generator voltage (AC voltage source) corresponds. This voltage value can be assigned to the ON state.

The OFF state is generated with the second switch contact, with which is short-circuited to the secondary side of the transformer. There at creates a current through the evaluation resistor, which is approx. corresponds to the full generator voltage.  

In the frequency evaluation, the selection device forms a two-wire line, transformer and AC voltage source an oscillator, whose resonant circuit from the secondary side of the transmitter, the Two-wire line and a capacitor (C₀) parallel to the second Där side of the transformer is formed with the resonance quenz f₀. The resonance frequency f₀ then corresponds to the state NOT ACTIVE. The ON state is formed by switching on a capacitor C₁ parallel to C₀ corresponding to a reso frequency f₁. The OFF state is formed by adding switch a capacitor C₂ parallel to C₀, what the Reso corresponds to the frequency f₂. The capacitor sizes are like this chosen that the frequencies f₀, f₁, f₂ in their sizes regulations for the purpose of uncritical evaluation divorce.

For the current direction selector are in the evaluation unit according to the number of connectable sensors complementary diode arrangements in the sensors Diode arrangements are available, two for each circuit parallel connected and oppositely polarized diodes, at for example, optical transmit diodes, each with an optically acting receiving transistor, for example Photo transistor, interact, for example optocouplers form. In this way a potential-free signal is transmitted achieved. In such a structure and to the AC power source connected circuit flows with not actuated switch contacts of the encoder no current, which the State corresponds to NONACTIVE. Accordingly, the An a signal to the bus coupling unit given, and it can generate a telegram and over the data bus can be transmitted. For example, if one of the Switch contacts trained as normally open, overflows the contact, the diode in series with it, the signal line device and the correspondingly polarized in the current direction of the Optocoupler in the evaluation unit a current, the positive Can have potential. If the other normally open contact of the encoder the current flows in the opposite direction and in this case has negative potential. This current direction  Selector device enabled by assigning the switch contacts when one contact is actuated, the generation of an ON-OFF standes and when actuating the other contact the generation an OFF state. The States in the bus coupling unit, for example, in a Switch-on telegram or switch-off telegram shaped and adres transmitted over the data bus. The addressed recipient ger, for example actuator, carries the one contained in the telegram Command off, for example switches a lamp ON or OFF.

The encoder can be used, for example, as a three-position button with a stable basic position (middle position) and two unstable end positions can be formed, wherein the sensing element as a rocker can be formed, which automatically after each actuation the basic position swings back.

The encoder is advantageous as a flush-mounted or surface-mounted installation lation device with standardized installation, manufacturing and Functional dimensions according to conventional electrical Installers trained.

Such a flush-mounted installation device can then Device base with a support element and expanding claws for Attach in a flush-mounted box. Of these devices Socket can be designed as a universal socket, which is by various decorative, cover and actuation elements can be supplemented. For example, the pushbutton of the device base can be coupled with a detachable actuator and that Support member can be coupled with a detachable cover frame, the surrounds the actuator. So in the case of an inte gration of the connection device in an existing installa only certain aesthetic design the two elements actuator and cover frame of the be to adapt to the standing shape.

The device base is designed to hold a circuit board det, which the selector, for example the Schaltkon clock and carries the diode array.  

The receptacle is open towards the front and is otherwise framed or trough-shaped. On the opposite side wall Storage brackets for the probe are attached to the recordings arranges, preferably integrally formed, the central of the probe hold the recording. The feeler has free ends Actuating cams assembled from base and protrude into the recordings.

The board is in the receptacle with the switch contact th populated side in a direction facing the sensing element Location used and there by holding means, for. B. rest and Resting pictures, fixed. The arrangement of the switch contacts the board is chosen so that one switch contact each Actuating cam of the pushbutton is opposite. Will that Swiveled in one direction, actuates the pushbutton there switching cams located the switching contact. When you let go swivels the pushbutton automatically into the middle position return If the probe is pivoted in the other direction, be the switch cam located there actuates the other switch Contact. The circuit board has the switch contacts against Overlying, rear-side connection terminals that are from the rear of the base are accessible. For this purpose is in the ground there is an opening in the base.

The encoder can have several tactile elements arranged side by side have, which correspond to several on the circuit board Dialers are assigned.

If the connection device is designed such that the Evaluation unit the connection of four sensor circuits via one each Two-wire line enables, for example, max. four Encoders with one probe element each, two encoders with two probe elements each or an encoder with four pushbuttons can be connected.

An exemplary embodiment is given below with reference to the drawings described the invention in more detail.

Show it:  

Fig. 1 is a perspective view of the mounting state of the combination of bus coupling unit and Auswerteein standardized prior to installation in flush-mounted boxes,

Fig. 2 shows the exploded view of the mounting condition of a timer prior to installation in a flush-mounting box,

Fig. 3 shows the view according to Fig. 2 for a different donor,

Fig. 4 shows a schematic circuit arrangement by the current direction signal,

FIG. 4a is a schematic circuit arrangement of the connecting device with amplitudes evaluation,

FIG. 4b is a schematic circuit arrangement of the connecting device with frequency evaluation,

Fig. 5 shows the top view of the transmitter base,

Fig. 6 shows the side view of FIG. 5,

Fig. 7 is a cross-section through the donor base part without carrying member,

Fig. 8 shows the inside view of the device base,

Fig. 9 is a plan view of the sensing element of the encoder,

Fig. 10 example shows the side view of the feeler member, partly in section,

Fig. 11 shows a cross section through the device base in the region of the bearing brackets of the feeler member.

The Figs. 1 to 3 of the drawings show a flush-mounted installation device for building systems engineering, which contains a two-core cable composed of a data bus network 12, a bus interface unit 13 and a user module unit 14, 15, 16. It should be noted that the installation arrangement can of course also be used as a surface-mounted version. In this case, commercially available surface-mounted boxes should be used instead of the flush-mounted boxes.

The bus coupling unit 13 is located in a housing 17 which has an edge recess 18 with contact elements (not shown) on one side. In the peripheral recess 18, a terminal block 19 is used with receptacles for the contact elements not shown, the line with connecting elements 20 in the form of screwless terminals for connecting the data bus is equipped 12th As is apparent from Fig. 1, the one end of the data bus 21 with a pair Anschlußelemen th 20 and the other end 22 of the data bus line 12 verbun with another pair of terminal elements 20 of the clamping block 19 the. To disconnect the cable network 12 of the bus coupling unit development, only the terminal block 19 from the Randaus needs recess to be removed 18th However, the data connection to other bus coupling units, not shown, is retained. The bus coupling unit 13 is used to generate and send data telegrams, to receive and evaluate the data telegrams and to process received data telegrams into switching, keying or query commands and for converting the switching, keying or query commands into an analogue or digital value, whereby several bus coupling units enable an orderly data telegram traffic. To perform these tasks, each bus coupling unit 17 has a microprocessor. On the front of the housing 17 of the bus coupling unit 13 there is a user interface in the form of a plug contact strip 23 , which is used to establish the communication connections between the bus coupling unit 13 and the user module unit 14 , 15 , 16 . Function-determining signals for generating and / or sending data telegrams are generated with the user module unit 14 , 15 , 16 .

The user module unit 14 , 15 , 16 forms a trinary functional unit and consists of the evaluation unit 14 and transmitters 15 , 16 installed in a separate housing 24 , each of which is connected to the evaluation unit 14 via a two-wire electrical line 25 , 26 . The housing 24 of the evaluation unit 14 has on one side a contact strip, not shown. The connection of the evaluation unit 14 to the bus coupling unit 13 is carried out by a multi-core ribbon cable 27 , the unit with the plug contact strips 23 of the evaluation unit 14 and the bus coupling unit 13 has complementary, unspecified plug contacts. On the, the Steckkon contact strip of the housing 24 , opposite side is a multi-pin terminal block 28 for connecting the ends 29 , 30 of the lines 25 , 26th Overall, four lines for the connection of four sensors can be connected to the evaluation unit 14 via the terminal block 28 . In Fig. 1, the two lines Lei 31 , 32 serve for the connection of two further, not Darge presented sensors.

The trinary states are generated with the transmitters 15 , 16 , as will be explained in more detail below.

The evaluation unit 14 receives and evaluates the trinary states generated by the sensors 15 , 16 . The evaluated function-determining signals for sending the data telegrams reach the bus coupling unit 13 via the ribbon cable 27 .

Fig. 1 of the drawing shows the state of assembly before a build in the flush boxes 33 , 34th It should be noted that the flush-mounted boxes 33 , 34 should already be plastered into the wall, so the wall surface, not shown, runs in the edge area of the boxes. The boxes 33 , 34 can be attached in the upper wall area like junction boxes. The housings 13 and 14 are advantageously connected outside the sockets 33 , 34 to the lines being marked and then stowed in the sockets, ie either loosely inserted or detachably fastened therein. The cans are closed in a manner known per se by means of overtape covers, not shown. The distance between the two sockets 33 , 34 is preferably as small as possible in order to obtain a short data line (ribbon cable 27 ) between the bus coupling unit 13 and the evaluation unit 14 . This reduces external interference when the data line is not decoupled.

In contrast, the connecting lines 25 , 26 , 31 , 32 between the evaluation unit 14 and the sensors 15 , 16 can be considerably longer, for example the arrangement according to FIG. 1 inside a room and the sensors 15 , 16 can be installed outdoors become. Because of the interference-insensitive generation of the trinary signals by decoupling, the length of the connecting lines 25 , 26 , 31 , 32 plays a subordinate role, and the three possible states, for example ON, INACTIVE, OFF, cannot be achieved by simple circuitry measures, for example current positive Electricity, electricity negative, are generated.

To generate the trinary states with the help of the sensors 15 , 16 there is in the evaluation unit 14 an AC voltage source 35 which feeds 48 circuits via a transformer, which are formed by the evaluation unit 14 , the two-wire lines 25 , 26 and the sensors 15 , 16 . In the sensors 15 , 16 there is a current direction selection device 36 , 39 ( FIG. 4) which is in the circuit, and in the evaluation unit 14 there is a current direction detection device 37 which is also in the AC circuit.

The current direction detection device 37 is formed by the input diodes, each of an optocoupler pair 38 , the input diodes being connected in anti-parallel. In Fig. 4, the first pair of optocouplers 37 are three identical pairs of optocouplers connected in parallel, of which the input diodes, the second pair of optocouplers 40 , are in the circuit with the Stromrich direction selector 39 .

The phototransistors of the optocoupler pairs 38 , 40 form the current direction evaluation device 41 , the output signals of which are processed in a subsequent evaluation logic 42 and whose output signals are transmitted to the bus coupling unit 13 via the data line (ribbon cable 27 ). The output signals of the evaluation logic 42 can be data telegrams, for example an ON telegram, a NONACTIVE telegram and an OFF telegram, or the output signals generate the data telegrams in the bus coupling unit 13 .

The current direction selection device 36 , 39 according to FIG. 4 contains a series circuit consisting of a switch contact 43 and a diode 44 and a second series connection consisting of a second switch contact 45 and a second diode 46 , the diodes 44 , 46 being arranged with opposite polarity are.

The current direction selection device 36 , 39 can be integrated in a three-position switch with a pushbutton 49 . A sensing element 49 designed as a rocker has a stable basic position (middle position) and two unstable end positions. In the middle position, the pushbutton is not actuated and the Schaltkon contacts 43 , 45 are also not actuated. . In the embodiment according to Fig 4, no current flows in the circuit; this corresponds to the INACTIVE state. If the pushbutton 48 is actuated, either the switch contact 45 is actuated and the switch contact 43 is not actuated or the switch contact 45 is not actuated, then the switch contact 43 is actuated. If the switch contact 45 is actuated, a positive current pulse reaches the current direction detection device 37 , which is evaluated in the current direction evaluation device 41 and which corresponds to the ON state. If the switch contact 43 is actuated, the negative current pulse is evaluated in accordance with the OFF state. The switch contacts 43 , 45 consist of miniature buttons and are designed as openers or closers.

FIGS. 4 schematically shows the circuit arrangement of the connecting device with amplitude evaluation. The device 36 a selectinrich contains two switch contacts 43 , 45 , of which the switch contact 43 is in series with a resistor R₂. When the switch contact 43 is closed, the resistance R₂ is parallel to the secondary device of the transmitter 48 , the switch contact 45 shorts the secondary device of the transmitter in the actuated state. When the switch contact 43 is closed, the switch contact 45 is open and vice versa.

In series with the primary winding of the transformer 48 is an evaluation resistor R₁ at the AC voltage source. On the secondary side of the transformer 48 , the amplitude selector 36 a is connected via the two-wire line 25 . When the switch contact 43 is open, the resistance at the output of the secondary side of the transformer 48 is infinite, which corresponds to zero volts at the evaluation resistor R 1. In the amplitude detection device 37 a, this value is assigned to the INACTIVE state. When the switch contact 43 is closed, a current flows through the evaluation resistor R 1, which produces a voltage drop of the size of half the voltage of the AC voltage source 35 , which corresponds to the ON state. The OFF state is generated by closing the switch contact 45 , whereby the full voltage of the AC voltage source 35 is present at the evaluation resistor R 1.

Fig. 4b shows the schematic circuit arrangement of the connection device with frequency evaluation. The selector 36 b forms with the two-wire line 25 , the transformer 48 and the AC voltage source 35 an oscillator, the resonance circuit is formed from the secondary side of the transformer 48 , the two wire line 25 and the capacitor C₀, with the resonance frequency f₀. The frequency selector 36 b contains in series with the switch contact 43 a capacitor C₁ and in series with the switch contact 45 another capacitor C₂. The capacitor C₀ is connected to the capacitor C₁ or C₂ in parallel. In the frequency detection device 37 b, the resonance frequency f₀ is evaluated as a NOT ACTIVE state and, for example in the evaluation logic 42, a NOT ACTIVE telegram is generated and transmitted via the data line 27 to the bus coupling unit 13 .

By closing the switch contact 43 , the capacitor C₀, the capacitor C₁ is connected in parallel, which results in a resonance frequency f₁, which corresponds to the ON state. When the switch contact 45 is closed, C₂ is parallel to C₀ with a resonance frequency f₂, which corresponds to the OFF state.

The encoder 15 , 16 is designed for modular construction and consists of a unit push button lower part 47 for installation in a conventional flush-mounted box 50 and of exchangeable actuators 51 , 52 , cover elements 53 , 54 , 55 or optionally connectable to the lower part 47 Decorative elements. For the actuators 51 , 52 and for the cover elements 53 , 54 uniform, with the push button 49 and / or with the support member 56 matching, not shown, coupling elements are provided. In the embodiment shown in Fig. 2, actuator 51 and cover frame 53 are formed as surface program components with a large-area actuator 51 . It should be noted that the cover frame 53 of the exploded view, for a better view of the button lower part 47 located behind it, is shown slightly offset from the row of the other parts. Referring to FIG. 3 of the drawings, the cover of the relatively small operating member 52. This version can be made of a metallic material and is accordingly protected against deliberate destruction. Other versions are conceivable, for example in a water-protected design, in a standard or luxury version. The advantage is that the parts mentioned can all be taken from existing switch programs.

The unit push-button lower part 47 has a device base 57 made of insulating material with column-like spacers 58 for the correct and spaced fixing of the support member 56 and support arms 59 , to which the support member 56 is fastened with angled retaining webs, not shown. At the ge-named holding webs, the conventional expanding claws 60, which are visible in FIG. 5 in plan view, are mounted, so that the device base 57 can be fixed in position in a flush-mounted box 50 by the support member 56 .

The device base 57 is formed as an upwardly open, rectangular hollow body 61 which sits on two opposite longitudinal sides bearing brackets 62 for the feeler member 49 be. The rocker-like button 49 consists of a pismatic coupling member 63 with pocket-like recesses 64 , in which the actuator 51 , 52 is inserted with non-illustrated web-like projections. Rotary cams 65 are formed on the coupling member 63 , by means of which the pushbutton 49 can be inserted between the bearing brackets 62 and can be latched into bearing eyes 66 . Plate-like widenings 66 are also formed on the coupling member, the size of which, according to FIG. 7, is adapted to the device base and serve as a cover 67 for the open side of the device base 57 . In the assembled state, the feeler 49 can pivot about its, formed by the rotary cams 65 , pivot axis, against the action of spring elements 68 , in both directions around a certain loading. The swivel range is limited in both directions by rigid stops 69 . The spring elements 68 are arranged on the plate-like widenings 66 and are designed as elastic tongues. After each actuation, the pushbutton 63 is pivoted back into the basic position (middle position) ( FIG. 7) by the spring elements 68 . Between the pushbutton 49 or its cover 67 and the bottom 70 of the device base there is a circuit board 71 , possibly with conductor tracks, which carries one of the selection devices 36 , 36 a, 36 b, 39 described in FIGS . 4, 4a, 4b . The boards 71 with the various selection devices 36 , 36 a, 36 b have uniform dimensions and can optionally be used according to the design of the evaluation unit 14 . The circuit board 71 is inserted into a receptacle of the device base 57 formed by guides 72 , supports 74 and latching elements 73 , that is to say snapped in in a form-fitting manner. The latching elements 73 are resilient, have latching lugs and are produced by slots in the side walls of the device base 57 , which slots are not designated in any more detail.

On each plate-like widening 66 there is an actuating cam 75 which is opposite a switch contact 43 , 45 on the circuit board 71 . If the pushbutton 49 pivots in one direction by actuating the actuating member 51 , 52 , the corresponding actuating cam 75 presses an unspecified stamp which closes the switching contact 43 , 45 ( FIG. 8). The function triggered thereby is described with reference to FIGS. 4, 4a, 4b.

On the bottom 70 of the device base 57 facing side of the board 71 , connecting terminals 76 are arranged in the form of a terminal block 77 . Terminal block 77 has four terminals 76 if the three-position button is designed as a series button. In the embodiment shown in FIGS. 7 and 8, two clamps 76 are sufficient.

In the bottom 70 of the device base 57 there is a recess 78 for the passage of the terminal block 77 , so that its connection terminals 76 are accessible from the rear of the device base 57 . The two-wire line 25 , 26 is connected at the ends 79 , 80 to the terminals 76 . To protect the terminals 76 , the recess 78 is bridged by a protective bracket 81 .

Claims (27)

1.Connection device for building system technology with a data bus constructed from a line network and bus coupling units which can be connected to the data bus and each contain a microprocessor, for generating and sending data telegrams, for receiving and evaluating the data telegrams and for processing received data telegrams in switching, pushbutton - Or interrogation commands and for converting the switching, keying or interrogation commands into an analog or digital value, the bus coupling units mentioned enabling an orderly data telegram traffic with each other, and each bus coupling unit being connected to a function-specific user module unit via several internal communication lines and a user interface , with the function-defining signals for sending the data telegrams are generated, characterized in that the user module unit is a trinary function unit ( 14 ), ( 15 ), ( 16 ) which consists of at least one independent transmitter ( 15 ), ( 16 ) with a device base ( 57 ) and a pushbutton ( 49 ) for generating the trinary states and an independent evaluation unit ( 14 ) with a housing ( 24 ) for recognizing and evaluating the trinary states, and that From the evaluation unit ( 14 ) with each transmitter ( 15 ), ( 16 ) via an electrical two-wire line ( 25 ), ( 26 ), ( 31 ), ( 32 ), the evaluation unit ( 14 ), ( 15 ), ( 16 ), and the encoder ( 15 ), ( 16 ) with the two-wire line ( 25 ), ( 26 ) form a circuit fed by an AC voltage source ( 35 ) that with the pushbutton ( 49 ) one within the device base ( 57 ) of the Transducer ( 15 ), ( 16 ) be sensitive and in the circuit select device ( 36 ), ( 36 a), ( 36 b), ( 39 ) can be actuated, with which the current direction (positive or negative) from a basic position or the amplitude or frequency of the AC voltage of the AC voltage source ( 35 ) can be controlled. 2. Connection device according to claim 1, characterized in that the encoder ( 15 ), ( 16 ) as a three-position switch with a lower part ( 47 ) and a part with the lower part detachably couplable from actuating, covering or decorative elements ( 51 ), ( 52 ), ( 53 ), ( 54 ), ( 55 ) existing, upper part is formed and has a stable basic position (middle position) and two unstable end positions. 3. Connection device according to claim 1 or 2, characterized in that the pushbutton ( 49 ) on the pushbutton lower part ( 47 ) is pivotally mounted and is designed as a rocker. 4. Connection device according to one of claims 1 to 3, characterized in that the rocker has a coupling member ( 63 ) for a detachably couplable actuator ( 51 ), ( 52 ) and on the coupling member on two opposite sides bearing pins or bearing eyes ( 65 ) to put in storage brackets ( 62 ) of the device base ( 57 ) are arranged that on the coupling member ( 63 ) plate-like extensions ( 66 ) are available, which form a cover ( 67 ) for the device base ( 57 ). 5. Connection device according to one of claims 1 to 4, characterized in that the selection device ( 36 ), ( 39 ) is designed as a current direction selection device which in series with a first switching contact ( 43 ) a first diode ( 44 ) and in Row with a second switching contact ( 45 ) has a second diode ( 46 ), the diodes ( 44 ), ( 46 ) being arranged with opposite polarity. 6. Connection device according to one of claims 1 to 4, characterized in that the selection device ( 36 a) is designed as an amplitude selection device and contains two switching contacts ( 43 ), ( 45 ), of which a switching contact in series with a resistor (R₂) is. 7. Connection device according to one of claims 1 to 4, characterized in that the selection device ( 36 b) is designed as a frequency selection device which in series with a first switching contact ( 43 ) a first capacitor (C₁) and in series with one second switching contact ( 45 ) has a second capacitor (C₂) and the series circuit ( 43 ), (C₁) or the series circuit ( 45 ), (C₂) another capacitor (C₀) can be connected in parallel. 8. Connection device according to one of claims 1 to 7, characterized in that the switching contacts ( 43 ), ( 45 ) consist of miniature buttons which can be actuated by actuating cams ( 75 ) of the push button ( 49 ). 9. Connection device according to one of claims 1 to 6, characterized in that the switch contacts ( 43 ), ( 45 ) are designed as make contacts. 10. Connection device according to one of claims 1 to 9, characterized in that the switch contacts ( 43 ), ( 45 ) are designed as NC contacts. 11. Connection device according to one of claims 1 to 10, characterized in that the AC voltage source ( 35 ) is contained in the evaluation unit ( 14 ). 12. Connection device according to one of claims 1 to 5 and 8 to 11, characterized in that the evaluation unit ( 14 ) contains a current direction detection device ( 37 ) and a current direction evaluation device ( 41 ) and the current direction detection device ( 37 ) via the Two-wire line ( 25 ), ( 26 ) is connected to the selection device ( 36 ), ( 39 ). 13. Connection device according to claim 12, characterized in that the current direction detection device ( 37 ) and the current direction evaluation device ( 41 ) consists of pairs of optocouplers ( 38 ), ( 40 ) whose input diodes are anti connected in parallel. 14. Connection device according to claim 13, characterized in that a plurality of optocoupler pairs ( 38 ), ( 40 ) are switched in parallel. 15. Connection device according to one of claims 1 to 14, characterized in that between the AC voltage source ( 35 ) and the selection device ( 36 ), ( 39 ) or the current direction detection device ( 37 ) a transformer or transmitter ( 48 ) is switched. 16. Connection device according to one of claims 1 to 4, 6, 8 to 11, characterized in that in series with the primary winding of the transformer ( 48 ) is an evaluation resistor (R₁) at the AC voltage source ( 35 ). 17. Connection device according to one of claims 1 to 4, 7, 8 to 11, 15, characterized in that the device ( 36 b), two-wire line ( 25 ), ( 26 ), transformer ( 48 ) and the AC voltage source ( 35 ) an oscillator bil whose resonant circuit consists of the secondary side of the transformer, the two-wire line and the capacitor (C₀), (C₀, C₁), (C₀, C₂). 18. Connection device according to one of claims 1 to 17, characterized in that the push button ( 49 ) at each plate-like widening at least one actuating cam ( 75 ) is provided, each with a switching contact ( 43 ), ( 45 ) within the device base ( 57 ) is opposite. 19. Connection device according to one of claims 1 to 18, characterized in that between the rocker and the bottom ( 70 ) of the device base ( 57 ) in a central receptacle of the device base ( 57 ), a circuit board ( 71 ) with the select device ( 36 ), ( 36 a), ( 36 b) is arranged. 20. Connection device according to claim 19, characterized in that on the bottom ( 70 ) of the device base ( 57 ) to the side of the circuit board ( 71 ) facing terminals ( 76 ) for the two-wire line ( 25 ), ( 26 ) are arranged. 21. Connection device according to claim 19 or 20, characterized in that the circuit board ( 71 ) in a by guides ( 72 ) and locking elements ( 73 ) formed receptacle of the device base ( 57 ) is inserted. 22. Connection device according to one of claims 19 to 21, characterized in that resilient locking elements ( 73 ) for the circuit board ( 71 ) are integrally formed on the side walls of the device base ( 57 ). 23. Connection device according to one of claims 19 to 22, characterized in that on the device base ( 57 ) operable by screws expanding claws ( 60 ) are arranged. 24. Connection device according to claim 4, characterized in that on the plate-like extensions ( 66 ) of the rocker spring elements ( 68 ) are arranged, which are rigid stops ( 69 ) of the device base ( 57 ) opposite. 25. Connection device according to claim 24, characterized in that the spring elements ( 68 ) are formed by elastic tongues of the plate-like extensions ( 66 ). 26. Connection device according to claim 20, characterized in that in the bottom ( 70 ) of the device base ( 57 ) a recess ( 79 ) is provided for the terminals ( 76 ). 27. Connection device according to claim 26, characterized in that the recess ( 79 ) is bridged by a protective bracket ( 81 ).