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Dold - Fast and reliable switching operations have become indispensable in modern electrical engineering. They are implemented, for example, via switches, relays, actuators or other components. E. Dold & Söhne GmbH & Co. KG is one of the leading European manufacturers involved in the development, manufacture and sale of switching, control and monitoring devices. The product portfolio includes four large product groups. These include switching devices for safety technology, monitoring technology, power electronics, control technology, time control technology and installation technology. On the other hand, the company manufactures printed circuit board relays, safety switches and locking devices, and the fourth product group is the electronics housing for control cabinets, distributors and in-rail buses. The areas of application of the products are very diverse. They contribute to factory automation in almost all branches of industry, ensure logistics automation, for example in drive and conveyor technology, in shipbuilding and traffic, and automate processes in recycling, raw material processing, metal construction and the chemical industry. Further areas of application are regenerative energies, waste water technology and e-mobility. As a specialist retail partner, we not only supply all of these industries worldwide, but also private and commercial customers. This means that numerous products from the Dold company can be found in the eibabo® technology store range. These include standstill monitors, time relays, remote switches, insulation monitors, emergency stop modules, undervoltage relays, coupling relays, phase monitors, direction of rotation monitors, frequency monitoring relays and many more. The headquarters of this medium-sized company is in Furtwangen. The company was founded in 1928 by Emil Dold and is still family-owned. The first major milestone was the production of the first quality relays in 1936. It now employs more than 400 people and is ISO 9001 certified. The eibabo® shops from eibmarkt® are an important part of the global sales network of E. Dold & Söhne GmbH & Co. KG.

Weidmüller - Hardly any branch of industry today can do without electronics and electrical connection technology. On the contrary, internationalization and technological change are progressing faster and faster. However, it is not only complex products that master the diverse challenges of a technological world. There would be no modern industry without cables and lines for the transmission of energy, signals or data. The same applies to the connection technology required for this. The Weidmüller company has specialized in the development of exactly this connection technology. She calls it Industrial Connectivity. The Weidmüller company has existed since 1850 and has its headquarters in Detmold. As a global industrial company, it has dozens of agencies on all continents and is one of the leading manufacturers in this field. As an original manufacturer or original equipment manufacturer, the company sets global standards in electrical connection technology. The products are characterized by precise processing and the highest quality. We at the eibabo® technology store have been selling the Weidmüller range with great success for many years. Complaints are extremely rare. The company's developments are used, among other things, in machine and vehicle construction, in the energy industry, by device manufacturers, in traffic engineering and in the building infrastructure. The Weidmüller product range includes plug and circuit board connectors, terminal blocks, protected assemblies, Industrial Ethernet components and relay couplers. The product portfolio also includes power supply and overvoltage protection modules for all connection types. Components for electrical installation and equipment labeling as well as basic I/O components round off the range. The innovative products of the Weidmüller brand are also available in the eibabo® shops of eibmarkt®. In addition to high-quality tools, you will also find feed-through terminals, installation terminals, protective conductor terminals, potential distributor terminals, end brackets, couplings, cross-connectors, voltage testers, network switches or mounting plates in numerous product categories.

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Circuits monitoring device - Devices for monitoring safety-related circuits are also referred to as emergency stop switching devices or safety relays. But what is the difference to a normal switching relay? You will find out in the following sections. Rely on quality and equip your safety-related circuits with high-quality emergency switching devices from the eibabo® online shop.Image: Pilz PNOZ XV2 emergency stop switching deviceWhat are safety relays?Despite automation, people are always involved in the implementation of technological processes. Safety at work plays a central role in this. By selecting suitable protective measures, the risk of endangering the health or life of people in the working area of a machine can be reduced. The most important protective elements include safety relays. Their task is to switch off the power supply in the event of a fault, danger or defect. This protects the life or health of the operator and prevents damage to the machine, the facility or the system.Originally, safety circuits were equipped with a single electromechanical contactor and combined with a circuit-connected safety switch. However, this variant did not offer complete protection. If, for example, the contacts of the contactor stuck together, the machine or system continued to run despite the safety switch being actuated. The solution to this problem was to add an additional contactor to the circuit. This already reduced the probability of errors, but still did not provide complete protection. Electronic devices were therefore developed which were equipped with at least two relays and a microprocessor system. A safety relay is therefore protected several times and automatically checks with each switching cycle whether its own safety device is still working properly. Even if a component fails, the safety device remains effective. The function of these safety relays henceforth made it possible to eliminate the risks associated with the use of a single contactor while knowing the status of input devices and output devices.Where are circuit monitoring devices used?The classic place of use for circuit monitoring devices is industrial systems. These devices are used wherever a workplace is potentially dangerous due to moving parts of a machine. The following safety circuits are the most common:The emergency stop switchThe emergency stop button is a large, robust and strikingly designed button that you can use to manually activate the safety relay and bring a machine to a standstill in the event of a hazard.Tip for saving:Complementary to circuit monitors are emergency stop switches and other components to create a complete safety device. Benefit from our low prices and save costs with combined shipping.Two-hand operationAs the name suggests, a circuit in this circuit is only closed when you press two different buttons with both hands. This is to prevent you from accidentally reaching into a rotating machine, for example. As soon as you release one of the two buttons, the safety relay stops the machine.protective doorsDangerous working areas are often provided with protective doors. Opening such a protective door triggers the safety relay, which then immediately interrupts the circuit. The machine stops.Light grids / light barriersWhere no protective doors or other physical barriers can prevent access to dangerous areas, the safety regulations are implemented using light grids or light barriers. If an object enters the monitored danger area, the safety relay is triggered and the machine stops.How is a safety relay structured?The typical structure of the safety relay uses a classic combination of 3 contactors. This system redundancy provides increased device reliability. Two relays ensure safe contact switching. Each is driven by one of the two input circuits. The operation of these circuits is not only determined by the signal present at their outputs, but is started by the starting relay. Between its outputs there is a control circuit (also a monitoring circuit) which checks the position of the actuators to be controlled and switched. What does that mean? After switching on, the device carries out a self-test. The input devices are checked first. If their circuits are closed, a safe state has been reached. The output devices are then checked. Here, too, the safety relay waits for a start signal, upon receipt of which the output devices are activated. The safety functions of the relay are now also activated and the device is ready to fulfill the required safety tasks.What are the advantages of programmable safety relays?There are applications where a conventional safety relay would not suffice. In such cases, using a programmable safety relay can be an excellent alternative. This is especially true in more complex systems where using a traditional relay would be cumbersome or impossible. Programmable safety relays are also referred to as control devices for circuit monitoring or programmable logic controllers (PLC). In a nutshell:Programmable logic controllers are devices that allow you to implement more safety functions than individual relays. While a separate safety relay is used for each device by default, one PLC can secure multiple devices. This saves a lot of space in the control cabinet. You can also use it to control processes that can be changed or corrected at any time. The programmable safety relays consist of input modules and output modules as well as a central unit. A processor executes the control algorithm stored in memory based on the data read from the input modules. The control signals are then sent to the output modules. These forward the signals to the corresponding actuators, which are connected to the relay outputs. Programming is done using a computer and the appropriate software or via the built-in keyboard or display. PLCs are most commonly found in modern security systems where sophisticated communication and complex data exchange takes place.Based on your requirements, you can now assess whether an emergency stop relay or a PLC is right for your application. Here you can get high-quality products from well-known brands such as Pilz, Siemens, Weidmüller, Wieland, Dold, Rockwell, ABB and many others. Catalogue content:In this eibabo® catalogue Relays > Device for monitoring of safety-related circuits you will find items from the following product groups:Item overview:Compact power supplyContact extensionDC power supplyEmergency stop relayEncoder moduleIsolation guardLight barrier guardLight curtainMuting functionOff-delayedOutput expansion devicePress safetyPress safety valvePress valveProtective door monitoringProtective door monitoring deviceProtective door relayProtective gate guardRelay moduleSafety controlSafety relaySafety switching deviceSafety switching relaySecurity moduleSecurity technologyTransfer pointValve monitoring deviceValve monitoring modulefrom the following manufacturers:Manufacturer overview catalogue Circuits monitoring device:ABBDoldEatonElotechEuchnerIfm ElectronicLeuzePepperl + FuchsPeterPhoenixPilzRockwellSchmersalSchneider ElectricSickSiemensStahlWeidmüllerWieland

Current monitoring device - If you would like to be in control of your electrical installation, then monitor your cables and wires for correct function and proper current flow. Especially if you want to minimize downtime or failures within production processes, you can counteract any problems early and effectively with a current monitoring relay. Learn more about the types and uses of power monitoring devices here. Use our help when making a purchase decision and choose from numerous quality products at top conditions here in your eibabo® shop.Analysis and EvidenceHigh-quality current monitoring devices are able to store errors that occur for later evaluation, to communicate with other components and, if necessary, to send out alarm signals.Devices of this type are typically installed in the control cabinet and use suitable relays to protect your system against undervoltage or overvoltage or against undercurrent or overcurrent.What types of surveillance devices are there?A monitoring device is a protective relay that is used to monitor various states of an electrical system. It is therefore an electrical switch which is triggered when certain specified parameters are exceeded. The device provides protection by shutting down the system in the event of an abnormal condition. A monitoring device (also called a control relay) typically consists of two main components: a sensing circuit for detecting condition and a trigger element. The detection element is used to determine the monitored parameters. The triggering element serves to trigger the switching process.Individual settings can often be made by the user with these devices. The protection parameters can thus be adapted to the requirements of the respective system. This is done using adjustment wheels and screws or, in the case of digital relays, using buttons and a display. Among other things, the following can be set:Delay ? to avoid false alarms due to sudden power surgesReset (manual or automatic) - used to reset the electrical system after a shiftRemote Reset - to remotely reset the electrical system after a shiftAlarm ? to trigger an alarm in the event of a trip Surveillance devices fall into different categories. These are based on the parameter being monitored. This can be voltage and current, but also filling levels or temperatures. The most common monitoring devices are:Voltage monitors - trip when the voltage in an electrical system exceeds and/or falls below a specified level.Phase monitors ? are used to monitor and protect against polarity reversal, phase failure and phase asymmetry. These constantly check the phase difference between two or more phases.Current monitors - protect equipment in an electrical system from overcurrent or undercurrent. Current monitoring relays trigger when the current exceeds or falls below a predetermined value.Frequency Monitors - Used primarily in Alternating Current (AC) systems where line frequency control is required. These relays are therefore used to protect against frequency anomalies.Temperature monitors ? primarily protect against overheating by constantly monitoring the temperature of the system and the devices that are being protected. Areas of application are predominantly industrial plants where extreme temperatures are a problem.Level monitors - are switches for level control in cisterns, tanks and other storage containers. These devices are used wherever liquid levels need to be monitored. Image: Pilz S1IM #828050 current monitoring relayThe different types of current monitorsCurrent monitors are important devices when it comes to protecting electrical systems. These help prevent damage to equipment and components by shutting off a circuit in the event of a fault. There are different types of electricity monitors. Each has its own advantages and areas of application. Depending on this, please select the right type to ensure proper protection.Primary and secondary power monitorsPrimary devices are mostly part of a circuit breaker and are mainly used in electrical networks with voltages up to 1000 volts. Secondary current monitors are connected to the circuit through a current transformer, which in turn is connected to the power supply. The current transformer reduces the current to a value suitable for the function of the monitoring device. Secondary current monitors are in turn divided into the following subspecies:Electromagnetic DevicesThe devices based on the principle of electromagnetism are the most common. These consist of a core with a copper winding and an armature with attached switch contacts. When the current is off, a spring keeps the armature away from the core. When a voltage is applied, a magnetic field builds up around the core. This attracts the armature and thus switches the connected contacts. The majority of electromagnetic devices are so-called polarized relays. These contain two cores with windings, a permanent magnet and a contact rod. Operation is dependent on the polarity of the input signal. There are electromagnetic relays for alternating and direct current. Their advantages lie in high-quality galvanic isolation, low price, low contact voltage drop and low heat development. No refrigeration is required. Devices of this type are resistant to impulse loads and interference from lightning strikes. The main disadvantages are the limited mechanical and electrical service life and the low operating speed.induction relayThe principle of operation of induction relays is based on the interaction between the current induced in a conductor and a variable magnetic flux. Therefore, with alternating current, these are used as indirect protection relays. The integrated components of the device are arranged in such a way that they are aligned with each other at the set frequency of the current and are not deflected. When the frequency changes, a moving element moves, causing the contacts to close or open. We distinguish between induction devices with a frame, with a pane and with glass.differential relaySuch devices compare the current strength before the consumer and after it. This consumer is usually a power transformer. In the normal state, both values are approximately the same. However, if a short circuit occurs, this balance is disturbed. As a result, the relay closes the contacts and turns off the faulty section of the circuit. Often found in household appliances and lamps, these relays protect people from electric shock.Relays on microcircuits in the integrated electronicsThe devices work with semiconductors such as triacs or thyristors. In the basic principle, such a device compares the incoming signal with the parameters stored in the device for trouble-free operation. If there is a deviation, the relay breaks the circuit.thermal relayThermal relays work with an integrated bimetal. This heats up when an electric current is passed through it. If the current flow deviates from the specified value, the bimetallic strip deforms, causing the contacts to open and close.What should you look for in a current monitoring device?In order for the current monitor to work, its parameters must meet the requirements of the assigned tasks. When selecting a device, pay attention to the following features:Voltage in volts - this is the voltage range in which the device normally operatesCurrent in amperes - each device is rated for a specific currentTripping power in watts - this is the minimum power of the electrical current supplied for normal operationControl power in watts - this is the maximum power of electric current at which the relay will perform its functions correctly TIPWhen making your selection, pay attention to the prevailing operating conditions. Is the device used in critical environments with high humidity, dirt, heat, cold or vibrations? Furthermore, the error detection depends on the accuracy of the measurement of the current strength in amperes. The response time of the device is another important parameter. How long does the device take from the moment of the event to triggering? Under certain circumstances, it can be advantageous to be able to individually set a delay before switching the device on or off for critical loads.As a specialist for smart home technology, we at the eibabo® online shop are your competent partner for all questions relating to intelligent electrical installation. You can get high-quality current monitoring devices from us from well-known manufacturers such as ABB, Dold, Eaton, Eltako, Hager, Pilz, Siemens and many others. Catalogue content:In this eibabo® catalogue Relays > Current monitoring relay you will find items from the following product groups:Item overview:Current measurementCurrent measuring relayDry run protectionFuse clampsLevel measurementLevel monitoringLevel relayLevel switchLoad monitoring relayLoad relayLoad shedding relayModular installation deviceOvercurrent monitorOvercurrent monitoringOvercurrent relayPower guardPower monitoringPower monitoring devicePower monitoring relayPower relayPower window relaySecurity moduleSelectivitySupplementary moduleTest functionThree-phase monitoring deviceTransfer blocksWindow current relayfrom the following manufacturers:Manufacturer overview catalogue Current monitoring device:ABBBenderDoldEatonEberleEltakoETAFinderHagerLützeMetzMurrelektronikPhoenixPilzSchalkSchneider ElectricSiemensWAGO

Installation relay - What is a relay and how does it work? What types of relays are there? Where are relays used? And which relay suits your project best? Here you can learn more about switching and controlling electrical circuits. Installation relays are used in many different applications. You will find relays in domestic electrical installations, in electrical appliances, in commerce and industry, and in vehicles.A look into historyThe first relay was invented by the American J. Henry in 1831 and was based on the electromagnetic principle of operation. Henry used the relay in his university lab as a 'gimmick' to entertain his students. However, it was not yet possible to switch gears. The first switching relay was invented by Samuel Morse in 1837. Morse refined Henry's device and adapted it to transmit signals (the Morse code) down miles of wire. This was also the basis for the telegraph.Did you know that the world's first computer was also built with only relays? It was a development by Konrad Zuse, which was presented in 1941. A lot has happened since then and relays are no longer used in modern computers. Nevertheless, the relay is still an important and popular component in electrical installations today. Think, for example, of switching on and off the lighting in the stairwell. The circuit works regardless of which floor you are on. However, there are numerous other areas of application. That is why different installation relays are also available in the eibabo® shop. Simply browse through our virtual catalogue. You will surely find some high-quality and inexpensive installation relays that arouse your interest.Image: Eltako ER12-110-UC switching relayWhat are relays?Relays are components within electrical installations of all kinds. They are mainly used as circuit breakers and control switches in electrical devices or are used as important components in many control processes. There are numerous types of relays, which differ in detail. The manufacturers develop the devices for special tasks and adjust the triggering characteristics accordingly. Relays that are often bought in this catalog are coupling relays, power relays, switching relays, interface relays, semiconductor relays and many more. The basic operating principle of a relay is to open and close circuits or contacts by reacting to electrical quantities such as current or voltage.How are relays differentiated?Relays are classified according to various criteria. These include:the type of physical inputs to which the relay respondsthe area of application that the relay assumes in control systemsthe structure of the device design and the principle of operationthe switching capacitythe shape and sizeand some others A relay consists of three main elements:entering / entering a valuethe intermediateof execution / actuation by actuator If we look at the type of physical input variable, we distinguish between electrical, thermal, optical, mechanical, magnetic or acoustic relays. NoticeNot all relays work with fixed physical quantities. Differential relays, for example, react to the difference in values. Polarized relays respond to a change in sign of a specific value. The acquisition of the measurand is the primary element of the relay. This converts the input value into another physical quantity. The receiving element can have different designs depending on the purpose of the relay and the nature of the physical quantity. In the case of a latching relay or a voltage relay, the receiving element consists of an electromagnet. In the case of a pressure relay, this can be a membrane or bellows. The sensing element of a level relay is usually a float and so on.The intermediate element compares the input value with the specified limit value of the device and, if it is exceeded, transmits an impulse to the executing actuator.The actuator transmits the pulse from the relay to the working circuits. Each relay basically contains a control circuit and one or more operating circuits. Depending on the type of actuator, the relays are divided into contact relays and contactless relays. Contact relays act on the outgoing circuit with the help of electrical contacts. Their closed or open state allows either full closure or full mechanical break of the work circuit. Contactless relays act on the working circuit by a sudden change in parameters in the control circuit. This is achieved via resistance, capacitance, inductance or a change in voltage level or current level.How does an installation relay work?Depending on the requirement and application, relays are simple or complex. However, the basic functional principle does not differ significantly. In the center is the coil with an iron core. When current flows through the coil, an electric magnetic field builds up. A movable, ferromagnetic armature reacts to this magnetic field and is attracted. This change in position connects two contact springs with each other and the so-called working contacts in the relay close. In this case, the relay acts as a closer. In some designs, so-called break contacts are opened when the magnetic field is created. These are called openers. Combinations of openers and closers are also possible. These are changeover contacts or changeover contacts.Already knew?If the coil of a relay is suddenly de-energized, high voltage peaks can occur. Therefore, depending on the model, resistors or diodes are used to prevent these voltage peaks from flowing back into the control circuit. Sensitive components remain protected.As soon as the coil no longer generates a magnetic field, the armature is returned to its original position by spring force. The make contacts are no longer closed and the break contacts are no longer open.What are Solid State Relays?More and more relay functions are currently being taken over by semiconductor circuits, so-called solid-state relays (SSR). A solid state relay is an electronic device that turns on and off a high power circuit with low voltages. There are no mechanically moving elements in this type of relay. The device consists of:a sensor that responds to an input signala solid-state electronics with high-performance circuitry Solid state relays can be used with both direct current and alternating current. With the help of thyristors and transistors it is possible to switch currents of several hundred amperes. Compared to electromechanical relays, semiconductor relays have a significantly higher switching speed. Solid-state relays are less suitable for switching under short-term overload conditions. Compared to electromechanical relays, solid state relays offer the following advantages:smaller dimensionshigh switching speedsnoiselesspowerfulmore energy efficientspark-free circuitmaintenance freelong lifetimelow sensitivity to adverse conditions What should I look out for when buying an installation relay?In the eibabo® shop there is a huge selection of different relays with numerous specifications. Choosing the right installation relay can be difficult. Before you buy, you should determine the function of your circuit and then define the task of the relay. Then select a suitable relay for your project. Decision criteria include:What kind is the physical input quantity?Will the device be subjected to vibration and shock?Where will the installation take place?Are dust, moisture or temperature fluctuations to be expected?What is the switching voltage and the switching current?Which current magnitudes and voltage magnitudes occur?What is the expected switching frequency?What requirements do I place on the durability of the relay?Are special functions or additional programming required? Notice:When switching active and inductive loads, opening the circuit for the contacts is the most difficult. In this case, arcing occurs, which puts a lot of strain on the contacts. The switching relays offered by eibabo® are high quality, inexpensive, versatile, reliable and universally applicable. The best-known manufacturers in our range are ABB, Doepke, Dold, Eaton, Eberle, Eltako, Finder, Hager, Jung, Schalk, Schneider Electric, Siemens and WAGO. Catalogue content:In this eibabo® catalogue Devices for distribution board- / surface mounting > Installation relay you will find items from the following product groups:Item overview:AC contactorAC voltage relayBoiler relayBuilt-in distributor deviceCan relayCoupling relayDC contactorExpansion moduleInstallation relayInstallation switching relayMemory relayModular installation devicePower relayPreset relayRelay interfaceRelay stationSwitching relayUniversal voltage relayfrom the following manufacturers:Manufacturer overview catalogue Installation relay:ABBDoepkeDoldEatonEberleEltakoFinderHagerJungSchalkSchneider ElectricSiemensWAGO

Special tools communication - Buy tools for communication installations cheap and in a big selection from eibabo! We offer a huge selection of suitable tools for pressing, cutting, stripping, crimping as well as other useful accessories. You will find a wide range of stripping tools, crimping pliers, wire strippers for data cables, coaxial cable and fiber optic cables, hand tools, compression sets and compression pliers, assembly tools and assembly case, pressing tools and pressing inserts and application tools, cutting tools and pipe wrenches. We offer in our online store exclusively brand name tools and accessories from renowned manufacturers such as Triax, Kreiling, Weidmüller, EFB-Elektronik, Siemens, Phoenix Contact, Telegärtner, Kathrein, Rod Beck, Daetwyler Cabl.DNT, E + P Elektrik, Cimco and many other manufacturers. With our tools, you are able to carry out all necessary work for installation, maintenance and repair of communication systems quickly, economically and effectively. Use only high-quality tools to be able to achieve excellent quality and to work quickly and effectively.Catalogue content:In this eibabo® catalogue Tools (Press, cut and isolate) > Special tool for telecommunication technique you will find items from the following product groups:Item overview:Application toolCoding toolCommunication technology special toolCompression connector crimping toolCrimp pliersCrimping pliers for communication technology connectorsCrimping pliers for fiber optic connectorsD-Sub connection toolD-Sub extraction toolD-Sub insertion toolExtraction toolGrip pliersHand pliersInsertion toolLSA PlusLSA-Plus application toolModular crimp toolParallel hand pliersPin insertion/extraction toolPressing toolProtective plug puller toolSpecial tool for telecommunication techniqueSpecial tool for telecommunication technologyStripperStripping toolTongsUniversal pliersWire stripperfrom the following manufacturers:Manufacturer overview catalogue Special tools communication:3MAstro StrobelCimcoCobiNetCommScope EMEACommScope/AMP NetconnCorningDehnDrykomDätwylerE+P ElektrikEatonEFB-ElektronikFluke NetworksGrotheHartingHellermann TytonHomewayIndexaKathreinKlaukeKnipexKreilingLappLeoni DatacomMetzOBOPanduitPhoenixReichle & De-MassariRutenbeckSetecSiemensTE Con.Energy+Ind/EUTE Connect.(Kissling)TelegärtnerTelevesTriaxWaltherWeidmüllerWentronicWisi

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