Showing papers by "Phoenix Contact published in 1999"

Analysis of Switched Ethernet Networks with Different Topologies Used in Automation Systems

Abstract: Ethernet is the most famous type of communication network used for office applications. Currently, networks used on field level and on office level are different due to their specific requirements. Especially for real-time systems, the deterministic behavior of the network is very important. Now Switched Ethernet seems to be applicable also on field level, because collisions can be avoided and priorities can be used. In this paper Switched Ethernet networks with different topologies are analyzed concerning the transmission delays. Therefore a typical master-slave scenario of an automation system is investigated.

Overvoltage protection system and overvoltage protection element for an overvoltage protection system

Abstract: An overvoltage protection system with an overvoltage protection element (1) and an ignition aid which triggers the overvoltage protection element (1), the overvoltage protection element (1) having two main electrodes (2, 3) and an air-breakdown spark gap (4) which acts between the main electrodes (2, 3). An overvoltage protection system having a relatively small and also largely constant operating voltage is implemented by there being an ignition circuit (5) with an ignition voltage output (6) as the ignition aid, the overvoltage protection element (1) having an ignition spark gap (7) which acts between the main electrodes (2, 3) with at least one ignition electrode (8) and the ignition electrode (8) being connected to the ignition voltage output (6) of the ignition circuit (5).

Connection port for electrical conductors

Abstract: the connection port has a current rail (3) and a first tension spring (1a) with one arm (4a) in contact with the current rail and another arm (2a) with a through opening (5a) for the current rail whose lower bounding edge (7a) forms a clamp edge for the conductor (11). A second spring (1b) matching the shape of the first tension spring (1a) and of the same spring material is mounted in the space within the first tension spring to increase the clamping force on the conductor

Electrical connector for circuit boards

Abstract: The connector has a box spring element with a clamp arm cut out of its wall and bent inwards. An actuator part (4) has a cable (2) through channel which extends from a cable input opening (10) at a press end (35) to a cable outlet opening at the inner end of the actuator part.

Overvoltage protection system

Abstract: The system has an overvoltage protection element (1) with a triggering ignition aid, whereby the overvoltage protection element has two main electrodes with an air breakdown spark path between them. The ignition aid is an ignition circuit with an ignition voltage output. The overvoltage protection element has an ignition spark gap between the main electrodes at least one ignition electrode (8), which is connected to the ignition voltage output of the ignition circuit.

Electrical connector for insulated or stripped wire

Abstract: The connector has a housing (2) with at least one connection for an insulated wire (3) or a stripped wire (4). A cutting member and a spring member are arranged in the longitudinal direction of the wire (3,4). The cutting member and the spring member are made of one metal part (5), and may be arranged one behind the other. The free ends of the laterally sprung limbs of the metal part may be formed as cutting edges.

Electrical connection unit which can be used with both insulated and stripped leads

Abstract: An electrical connection unit including a housing with at least one terminal for receiving either an insulated lead or a stripped lead and at least one metal part having a cutting element and a spring element. The cutting element and the spring element are located along a longitudinal extension of the lead thereby minimizing the height of the electrical connection unit such that it may be used in confined spaces. In accordance with one embodiment, the cutting element and the spring element coincide in space such that they are substantially coplanar to further reduce the size of the electrical connection unit. In accordance with one embodiment of the present invention, the metal part serves a dual function as a cutting element and also as a spring element and has an essentially box-shaped configuration. The housing may also include catch projections and/or attachment cross pieces to retain the metal part in the housing. Furthermore, a mountable thrustor and /or latchable cover may also be provided.

Cable connector for multi-core cable has clamping legs that act over sealing collar to grip cable

Abstract: The connector has a connection component (4) with an external thread (5), over which a clamping nut (7) with an internal thread and a cable feed through opening (9) is threaded A clamping piece (10) with several clamping legs (12) grips the cable A seal (13) is provided around the cable The seal comprises a sealing collar (16) which is of a length such that the clamping legs act over the collar to grip the cable

Fieldbus components, communication system and process for the transmission of data over a high speed transmission medium

Abstract: The invention realizes high speed data transmission, as known from the Fast Ethernet, with fieldbus systems in the field of industrial automation. A suitable fieldbus component includes a data link layer, which operates with a fieldbus protocol, and a physical layer, which is constituted for high speed data transmission. There are also provided an interface, which connects the data link layer and the physical layer, and a layer for matching the data link layer to the physical layer.

Vorrichtung zur elektronischen Überwachung des Versorgungsstromes von an einen Bus angeschlossenen Baugruppen

Abstract: Die Erfindung betrifft eine Vorrichtung zur elektronischen Uberwachung des Versorgungsstromes von an einen Bus angeschlossenen Baugruppen, insbesondere zur Uberwachung des Versorgungsstromes von Busteilnehmern eines Automatisierungsbussystems. DOLLAR A Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zur elektronischen Uberwachung des Versorgungsstromes von an einen Bus angeschlossenen Baugruppen bereitzustellen, welche einerseits bei Bedarf eine sichere Trennung von der Versorgungsspannung durchfuhrt und gleichzeitig die Diagnosefahigkeit zum Zwecke der Fehlersuche aufrechterhalt. DOLLAR A Dies erreicht die Erfindung dadurch, das die Vorrichtung zumindest eine Einrichtung zur Erfassung und zumindest eine Einrichtung zur Begrenzung und/oder Abschaltung des Versorgungsstromes aufweist. DOLLAR A Dabei spricht die Einrichtung zur Abschaltung des Versorgungsstromes auf den Wert des erfasten Versorgungsstromes an, womit sichergestellt ist, das die Energieversorgung fur andere Baugruppen des Automatisierungsbusses, welche bezuglich der Versorgungsspannung parallel geschaltet sind, nicht ausfallt, wodurch zumindest ein beschrankter Betrieb der Anlage aufrechterhalten bleibt und damit auch eine Fehlerdiagnose moglich bleibt.

Multi contact plug connector with blade contacts

Abstract: The multi contact connector has a base (4) in which are formed contact bushes that receives the pins (11) of a blade connection element (1). The connection elements are sandwiched between the base and a cover (5). The cover is formed with a pattern of holes (51) that provide locations for the elements. Cable ends (71) are inserted to engage the blade contacts. ELECTRONICS- Has a multi contact connector with blade contacts

Cable-connection or cable-joint device

Abstract: An internal section (5) of the connector provides channels (18) accepting and guiding the wires of the cable. These are parallel and open at one end of the section. At the other end they turn into pockets (25) opening radially outwardly.

Fixing device for attaching electric power cable shield terminal e.g. to bus-bar base, has one-piece sheet-metal carrier with opening for receiving terminal

Abstract: A terminal is provided with a sheet-metal body (2) with slots (4) for attachment to a bus-bar A one-piece carrier (7) made of stamped sheet-metal has an opening (9) along one side of which a fixing bar (8) is formed for receiving the terminal The carrier has protruding feet (14) at a height appropriate to the protrusion of the fixing bar when the carrier is its assembled position

Schaltungsanordnung zur gesicherten Datenübertragung in einem ringförmigen Bussystem

Abstract: Die vorliegende Schaltungsanordnung erlaubt es, an ringformigen Standardbussystemen Daten zu ubertragen, die fur den Aufbau fehlertoleranter Strukturen notwendig sind. Zur Realisierung benotigt man eine Uberwachungseinheit und dezentrale Ein- und Ausgabeeinheiten, die Daten zur Regelung oder Steuerung senden oder entgegennehmen. Die Schaltungsanordnung ubernimmt die Aufgabe, eventuelle Fehler zu erkennen, die fur den Prozes innerhalb einer Maschine oder Anlage zur Gefahr werden konnen. Durch den internen Aufbau identifiziert die Schaltungsanordnung bereits vor der Fehleroffenbarung zum Prozes einen eventuellen Fehler und leitet eine gesicherte Abschaltung ein. Dabei ist es gleichgultig, ob die externe Steuerung oder das verwendete Bussystem fur den Fehler verantwortlich ist.

Insertion piece for an industrial connector

Abstract: The contact insert has a plastics housing block (2) with at least 2 terminals (3) for incoming electrical leads (4) and at least 2 pin or socket sleeve contacts (8), respectively connected to the terminals. The contact insert is used with insulated electrical leads, each of the terminals provided as a knife contact for penetrating the lead insulation, with the terminals positioned in mirror symmetry to the centre plane (M) of the contact insert.

Electrical connecting unit

Abstract: The unit has a casing (2) with at least one connector for at least one insulated conductor (3) or stripped conductor (4) with at least one cutting element and at least one spring element. Both the cutting element and the spring element are arranged along the longitudinal direction of the conductor. The cutting element and the spring element may consist of one metal part (5) or may be mounted one behind the other.

Equipment for safe automation of machines and electrical equipment comprises decentralized switch units receiving signals from safety sensors and supplying e.g. actuators and motors

Abstract: Decentralized switch units (15, 15') are mounted directly on the machines to be operated and monitored. These units supply power to the machine actuators and sensors. Safety-relevant signals are produced from the sensors and/or automatic- and/or manually-operated safety equipment at positions of risk, on or in the machine. They are sent over at least two channels to the switch unit (15, 15') for evaluation of each operational state. One of the channels (the second) includes its own (safety interlocking) computer (6) constructed as part of the switch unit (15').

Connector for insulation displacement connexions

Abstract: The connector (1) is provided for at least one lead (3). The connector has a housing (4) with at least one chamber (5). A slider (6) is provided in the chamber (5) to be movable between an assembly position and a connection position. A flat knife contact blade (7) is provided in the chamber (5). The chamber (5) is defined by opposing side walls (8). The contact blade (7) in the chamber (5) is arranged at an angle which is not 90 deg to at least one of the side walls (8). The blade is preferably at an angle of 45 deg.

The Use of Radio Technologies in the Fieldbus Area -Using INTERBUS as an Example

Abstract: Until recently, data transmission by radio in the fieldbus area was inconceivable. The available radio technologies were too susceptible to interference, cumbersome, expensive and slow. However, new radio technologies such as DECT or the 2.4 GHz ISM band used in 802.11 offer promising new possibilities for fieldbus links which were only previously made possible using costly connection technology. This offers the user both straightforward installation and a higher degree of flexibility, without increased costs. Through the joint project supported by BMBF (German Federal Department of Education, Science, Research and Technology), “Wireless Fieldbuses in the Production Environment” (FUNBUS), and cooperation with the technical college FH-Lippe, initial experiences of using radio technologies on Interbus have been collated from various viewpoints and a product-related prototype has been developed for use on Interbus.

Electrical connection unit for at least one insulated conductor

Abstract: The unit has a casing (2) with at least one connector for at least one insulated conductor (3) or stripped conductor (4) with at least one cutting element and at least one spring element. Both the cutting element and the spring element are arranged along the longitudinal direction of the conductor. The cutting element and the spring element may consist of one metal part (5) or may be mounted one behind the other.

Verfahren zur Vergabe von IP-Adressen in Kommunikationsnetzen

Abstract: Um die Vergabe von ersten und zweiten Adressen an Teilnehmer (A .. F, 1, 2) eines Kommunikationsnetz mit zumindest einer Kopplungseinrichtung (2), an dessen Ports Endteilnehmer (A .. F) angeschlossen sind, auf einfache Weise zu ermoglichen, wird ein Verfahren vorgeschlagen, bei welchem eine Zuordnung von vorbestimmten ersten Adressen zur Kopplungseinrichtung (2) und zu ihren Ports abgelegt wird, wobei zuerst von der Kopplungseinrichtung (2) die zweiten Adressen von an ihren Ports angeschlossenen Endteilnehmern (A .. F) erfast wird, und danach die in der abgelegten Zuordnung vorbestimmten jeweiligen ersten Adressen an die durch die zweiten Adressen festgelegten Endteilnehmer ( A .. F) gesendet werden, welche an den zugeordneten Ports angeschlossen sind.

Carrier profile for construction of automation system for more flexibility

Abstract: The carrier profile (40) has several stiffening devices (80,85,90) and at least one attachment device (60) for removable devices to be supplied with electrical power. At least one device delivers power to any point or defined points, at which a device can be attached to the carrier profile and automatically electrically connects to power supply device, which can be a current rail or an electrical power line. An Independent claim is also included for an electrical arrangement for removable mounting on the carrier profile.

Interbus in safety critical applications

Abstract: The introduction of bus systems in automation technology marked the beginning of a revolution for system operators. The new technology provided the user with new opportunities, which had previously been impossible using conventional technologies. Since its market launch in 1987, INTERBUS has gradually replaced parallel cabling. Alongside savings in extremely heavy wiring harnesses and intermediate terminal connections, customers now also benefit from, for example, diagnostic messages about the status of their systems. INTERBUS is a bus system which currently enables the user to network anything from basic sensors and actuators to complex control systems using a single bus cable, and it is now actively supported by several hundred manufacturers. It has always been possible to integrate new features into the system, so that even the earliest devices can still be used in systems today. For INTERBUS, compatibility is not just a word; it is a reality. INTERBS Safety, which will soon be available for use in safety-oriented applications, will also be compatible with existing INTERBUS networks, so that any investments already made will be secure for the future. It is even possible to integrate safety applications into operating INTERBUS systems retrospectively without major changes. This article highlights the basic implementation methods for INTERBUS Safety and provides an outlook for the future applications of INTERBUS Safety in safety technology.

Apparatus and method for the planning of bussystems

Abstract: The arrangement has a device for detecting, storing and selecting machine-related data and bus-related data and at least one output device for outputting and/or representing and/or transmitting the data. The arrangement has a device for elective manual and/or automatic combination of input data. An Independent claim is also included for a method of determining bus system parameters and/or configurations.

Method for half-duplex transmission of an added sum-frame

Abstract: of EP0963078The method involves exchanging data between master (12) and slave (11) subscribers via a bus system with branches (14) at nodes (13). The subscribers access a data message using the input/output oriented access method. In a first transmission phase the master breaks the data message into branch messages that are sent to the slave subscriber defined by the node switching state in the corresp. branches. The branch telegrams carry node data defining the node switching state. The nodes exclude the slaves for whom the branch telegram is not specified by transferring synchronisation data. In a reception phase the non-excluded slaves return branch messages to the master in reverse order and the master combines them. The nodes free the branches with excluded slaves, whose slaves have still not sent branch messages, after the slaves' reading phase ends by transmitting synchronising data.

Sytem for cable-connection of a control and data transmission installation

Abstract: The control and data transmission system (5) includes at least one serial field bus (10), with an associated control unit (20) and several bus subscriber units (30,40,50). A single supply cable (69) connects a central power supply unit (68) to logic components (34,38,70,80) as well as to load components (110,120). The control and data transmission system includes at least one safety switch (80) which, based on a reported fault, switches off all faulty logic components and/or all faulty load components by disconnecting them from the central power supply unit.

Overvoltage shunt circuit

Abstract: An overvoltage shunt circuit has a shunt path connected to an operating current path with an overvoltage shunt that heats up from overload, change or similar in the fault situation and is coupled thermally to a temperature safety fuse lying in the current path. The operating current path consist of at least two branches (IB1,IB2) connected to the shunt path (IA) and in each branch is located a temperature safety fuse (F1,F2) coupled thermally to the overvoltage shunt (R). An isolation indicator is wired in parallel with each fuse. A single isolation indicator is wired in parallel with the series arrangement of both fuses of two branches.

Use of Formal Specification and Design Language for Protocol Description - Field Report -

Abstract: Due to the growing demands placed on fieldbus systems, continuous development of protocols is required. Since it is becoming difficult to ensure consistency because of the increasing complexity of specifications based on informal text, the formal specification language SDL has been used in the current project. The experiences gained in relation to changes in the development cycle through the use of a formal specification language are described. The link between SDL and MSC, and its strengths and weaknesses are illustrated. The options for verification through simulation are introduced.

Overvoltage arrester element

Abstract: The excess voltage protection unit, to lead off transient excess voltages, has electrodes (3,4) with current connections (1,2). An air break spark stretch (5) is between the electrodes (3,4). The stretch (5) extinguishes mains current surges following the pickup voltage of lightning current, as the electrodes (3,4) are in parallel. The structure is contained within a housing (6).