Relays & Switches | Discover the possibilities!

ELEKTRONISCHE BAUELEMENTE

Details: Released: 19.04.2023; Last updated: 20.08.2023; Hits: 8415

Relais are indispensable components that control a large number of switching operations by converting an electrical signal into a mechanical signal. There are many relay types such as safety relays, timing relays, switching relays, signal relays, reed relays, automotive relays, impulse relays, power relays, miniature relays, printed circuit board relays, solid state relays, semiconductor relays and more. Find out more about the possibilities that modern relays offer you and discover the optimal solution for your needs Applications.

Contents

Vehicle relay for charging infrastructure of electric vehicles
Miniature coaxial reed relay for 3 GHz HF systems
Relay modules for hazardous areas
Circuit breaker significantly reduces power consumption and maintenance
Robust miniature power relays
First single-phase IO-Link semiconductor relay
Safety relays and output expansions that save space

Archive for relay novelties
What is a relay?

Vehicle relay for charging infrastructure of electric vehicles

19.04.2023/XNUMX/XNUMX | Due to the ever-growing demand in the private sector, Schukat focuses its range of relays on electric vehicles and their charging infrastructure. The AZEV116, AZEV132 and AZEV140 series single pole relays from note are specially designed for use in charging cables Designed according to IEC 62752 for charging mode 2 electric vehicles. If the worst comes to the worst, they use their monitoring contact to signal that the load contact has welded.

IEC 62752 and Wallbox charging mode 3

These relays provide a large contact distance of ≥ 2,25 mm and a dielectric strength (coil / contact) of 4000 VRMS. The short-circuit requirements of IEC 62752 are met. The requirements of IEC 62955 for use in charging mode 3 wall boxes are also guaranteed. An electrical service life of at least 50.000 switching cycles is guaranteed for the vehicle relay. All relay types are certified by TÜV and UL/CUR Approval.

The three new relays are reliable switching relays with different specifications and switching capacities:

Relay for 30.000 to 50.000 switching cycles

The AZEV116 relay operates under currents of up to 20 A with 30.000 switching cycles. The switching capacity at 50.000 switching cycles is 16 A. The switching voltage is max. 400 V AC, the switching capacity is max. 6400 VA. The short-circuit current strength is defined as ≥ 1,02 kA, ≥ 2,5 kA²s (IEC 62752).

Relay for 10.000 to 50.000 switching cycles

The AZEV132 relay operates under currents of up to 40 A with 10.000 switching cycles. Its switching capacity at 50.000 switching cycles is 32 A. The switching voltage is max. 400 V AC and the switching capacity is max. 12.800 VA. The short-circuit current strength is defined as ≥ 1,5 kA, ≥ 6,0 kA²s (IEC 62752).

Relay for 6000 to 50.000 switching cycles

The AZEV140 relay works under currents of up to 50 A specified with 6.000 switching cycles. Its switching capacity at 50.000 switching cycles is 20 A switching on / 50 A conducting / 20 A switching off. The switching voltage is max. 440V AC and the switching capacity is max. 22.000 VA. The short-circuit current strength is ≥ 1,5 kA, ≥ 6,0 kA²s (IEC 62752) and ≥ 1,85 kA; ≥ 4,5 kA²s (IEC 62955).

For all relay versions, the monitoring contact (1 form B) is specified with 10 mA, 12 V DC and 50.000 switching cycles.

Miniature coaxial reed relay for 3 GHz HF systems

07.09.2022 | Pickering Electronics introduces a new miniature coaxial reed relay for 3GHz HF systems. The SIL / SIP reed relay series 113RF allow an assembly distance of 2 mm. This enables a very high packing density.

"These small, miniature, shielded relays are faster and smaller than electromechanical relays (EMR), have lower insertion loss and better DC characteristics than solid state relays (SSR), and better hot-switching specification than microelectromechanical switches (MEM)" comments Kevin Mallet, Technical Specialist at Pickering Electronics.

Switch the new reed relays up to 10W at 0,5A. 1 Form A configurations (SPST, normally open) are available with 3V or 5V coils and coil resistances of up to 100 or 300 ohms, respectively.

At low levels, the typical life expectancy of Bulletin 113RF relays is more than 250 million reliable switching cycles. The relays use reed switches with the highest quality sputtered ruthenium contacts. They are very suitable for automatic test systems.

All 113RF series relays have an internal Mu-metal magnetic shielding for high packing density without the risk of neighboring relays interfering with each other and causing malfunctions.

Pickering Electronics will be exhibiting at the Electronica 2022.

Relay modules for hazardous areas

23.02.2022 | R. Stahl presents two new relay modules for Zone 1 hazardous areas. The 9174 and 9177 relays allow switching of AC and DC loads in the Ex e and Ex i types of protection. With a space requirement of only 12 mm, the relays are very compact. A field housing made of plastic or thin-walled stainless steel is sufficient for the application. At the same time, the new relays are very flexible when used in circuits with the type of protection intrinsic safety "i" and increased safety "e".

The classic Relay type 9177 Enables the electrically isolated switching of non-intrinsically safe (Ex e) and intrinsically safe (Ex i) circuits, both AC and DC (e.g. solenoid valves or signal relays) based on an electromechanical relay. Ex i circuits and Ex e circuits can be connected in any combination to the connections for the coil and contact. This allows up to four operating modes with just one relay. Thanks to the gold contacts, current circuits in the mA range can also be reliably switched in addition to the switching capacity of up to 2 A.

Miniature connectors for safe signal transmission

The Relay 9174 switches electronically without mechanical parts and therefore works practically wear-free. The limitation of service life known from classic relays due to the maximum permissible switching cycles is no longer applicable. This is particularly interesting for circuits which e.g. B. be switched several times within 1 hour. Because replacing a relay in zone 1 causes significantly higher costs than in a comparable industrial environment, this is a particular advantage.

With the electronic relay type 9174/12-15-01 AC loads up to 5A switch using an intrinsically safe (Ex i) or alternatively non-intrinsically safe (Ex e) control. When controlling the signal relays using an intrinsically safe signal (Ex i), the remote I/O system is an ideal addition. Thanks to the integrated protection for the contact and coil circuit, there is no need for any additional protection. That reduces the wiringeffort and space requirement in the field housing. The relay modules also easily withstand temperatures from -40° to +75 °C. For a quick overview, the switching status is indicated optically via an LED.

Relay type 9177/12-11-01 is suitable for applications of functional safety (SIL). A corresponding assessment will come in the course of 2022. All variants of the 9174 and 9177 relays are Atex or IECex approved. Further approvals are expected in the coming months. Both relay modules supplement the manufacturer's IS9174+ explosion-proof remote I/O system with the already available electronic relay module for DC loads 10/14-00-1.

Circuit breakers for low-voltage power distribution in buildings

18.01.2022/XNUMX/XNUMX | The Mitsubishi Electric Corporation in Tokyo was awarded the R&D 100 Awards 2021 for her open circuit breaker World Super AE V Series C-Class awarded. The switch protects low-voltage switchgear of factories, buildings and renewable energy plants. The industry's first electromagnetic operating mechanism significantly reduces maintenance costs and energy consumption.

Robust miniature power relays

13.01.2022/6/XNUMX | The new GXNUMXQ relays from offer flat dimensions with a high switching current Omron. In addition, they are robust and stable. With a switching current of 36 A @ 250 VAC they switch 10.000 times, and at 30 A @ 250 VAC even 100.000 times. The AC safety shutdown in EV chargers with high output power for shorter charging times are main areas of application. The G6Q relays are also suitable for other safety-relevant applications such as ground and air heat pumps, ventilation and temperature controllers as well as elevators and elevators.

By dropping the voltage applied to the coil for 100 ms of relay operation after applying the rated voltage, power consumption is reduced compared to the nominal consumption of the coil to 12% and thus to 35% of the nominal voltage of the coil.

The monostable relays are available with a coil voltage of 12V and a coil resistance of 102.9 Ω as well as 24 V voltage and 411.4 Ω resistance.

Omron exhibits at the Hannover Messe 2022 and on Automatica 2022.

First single-phase IO-Link semiconductor relay

16.12.2021 | The new relay GRP-H from Gefran is the first single-phase semiconductor relay with digital IO-Link protocol. An evolution of the GRS-H series, it is part of the GR platform of Solid State Relays (SSRs). The electronic component In addition to extended functions for monitoring electrical resistances, SSR also offers highly developed diagnostic tools for the early detection of partial load interruptions.

"The GRP-H are the first solid-state relays with an architecture based on the IO-Link standard," comments Paolo Buzzi, Marketing Manager Controllers & Power Controllers at Gefran. "They are characterized by a robust, ultra-compact design and a high degree of modularity as well as a wide current range from 15 A to 120 A."

DC motor and other drives for medical technology

The IO link protocol allows the integration of the GRP-H solid state relays in the Automation and an extensive data exchange of e.g. B. operating hours or current or temperature peaks. This makes the new relays suitable for predictive maintenance and simple, fail-safe wiring.

The load monitoring of the GRP-H relay records partial load interruptions with a resolution of up to 1/8 of the total load. This sensitivity is predestined for the packaging technology, where temperatures play a major role. The switches are designed for linear and non-linear ohmic resistances. Here they master all operating modes: zero crossing, burst-firing operation, half-wave and phase control. Another characteristic feature of this series of relays is the soft-start function for heating elements such as infrared lamps, which react very sensitively in the preheating phase.

The new relay series is quick and easy to set up yourself via the NFC app (Android + iOS). configurable in the field. In addition, the app also simplifies possible maintenance because it can read out the configuration of the relays and automatically send the data to the service. New configurations can then simply be uploaded to the relays via the app.

Safety relays and output expansions that save space

29.11.2021/XNUMX/XNUMX | Schmersal launches two new safety modules: the relay SRB-E-302ST and the exit expansion SRB-E-402EM. Both are efficient and space-saving solutions for that safe signal evaluation. Depending on the application, the relay switches with the safe relay contacts or wear-free with a safe semiconductor output. Applications up to category 4/ PL e (EN ISO 13849-1) and SIL 3 (IEC 61508) can be implemented.

Archive for relay novelties

Digital protection relay for intelligent energy monitoring
Versatile safety relays also for the American market
Slim solid-state relay for snapping on
Relay for wave soldering in half the space
Safety relay with explosion protection valid worldwide
Coupling relay as interface between logic and load

Digital protection relay for intelligent monitoring

28.01.2019 | Mitsubishi Electric expands its highly configurable and scalable monitoring portfolio menergy for the transparent acquisition and analysis of energy data around a protective relay and a soft starter. The "Meprotect" digital protection system, available for the first time on the European market, is flexible and modular. Added to this is the digital soft starter "Mesoftstart", which also works in harsh environments.

Versatile safety relays also for the American market

10.01.2019/XNUMX/XNUMX | The "Miro Safe+" safety relays from Murrelektronik are designed to achieve high safety standards up to performance level e (PLe) according to EN 13849-1. They are particularly powerful. The Miro Safe+ Switch HL 24, for example, is suitable as an EMERGENCY STOP, protective door, Light grids and magnetic switch applications.

He has three make contacts and one break contact. It can be used with and without start button monitoring. The Miro Safe+ Switch H 48-230 is the all-rounder with a wide voltage input. This relay for applications with 48… 230V AC, for example also for the American market, is suitable for EMERGENCY STOP and protective door monitoring with and without start button monitoring.

Miro Safe+ T 1 24 takes over time management tasks. This module is optimally suited if in an application both undelayed as well as delayed contacts are needed. Delays of up to 30 s can be set individually. In addition, this relay is particularly compact with a width of only 22,5 mm. Miro Safe+ T 2 24 has two time-delayed contacts and an overall width of 45 mm.

Intuitive design of electric drives with online configurator

Miro Safe+ Switch Ecoa 24 has a minimalist design. It is suitable for use in protective door, EMERGENCY STOP and light grid applications and is screw terminals Mistake. This module is a good alternative if no monitored start button is required. The safety switches of the Miro Safe+ series also offer clear assignment through labeling, LED status displays on the front of the relay, flexible uses through cross-circuit detection that switches off, as well as quick connection with pluggable spring-loaded terminals using quick connection technology and coding elements that ensure that terminals are not mixed up become.

Slim solid-state relay for snapping on

14.11.2016 | With the snap-on semiconductor relay Gogaface SDE has Gogatec expanded its product range with a space saver, the special feature of which is the changeover contact on the output side. The solid state relay with LED status display can switch DC devices with up to 5...48 VDC at 0,5 A, electrically isolated via a changeover contact.

The relay, which is only 6,2 mm wide, 84 mm long and 79 mm high, can be easily and save space snap onto a 35 mm mounting rail and works reliably between -20° and +80 °C.

The input voltageThe range is 10...40 VDC with dropout voltage below 5V DC. The relay can be loaded with 10 A for a short time (5 ms). The leakage current is not more than 1mA. The Gogaface SDE only needs 12 µS for switching on and off at a maximum switching frequency of 1 kHz.

The 20-pin connector is available as an optional accessory wiring comb Gogaface EDZ.

Relay for wave soldering in half the space

05.07.2016 | With the signal relay series AZ956 and AZ957 from Zettler Electronics Schukat has relays with particularly small dimensions in its range. Thanks to their dimensions of 956 x 13 x 7,62 mm, the AZ6,9 signal PCB relays only require 50% of the space compared to conventional relays. With a low coil power of <70 mW, they are available in voltages of 5 V and 12 V.

Thanks to their dimensions of 957 x 12,8 x 7,8 mm, the AZ10,3 series relays also enable a high packing density on the circuit board. There are two different versions of these relays with the voltages 12V and 24V: with sensitive coil and 150 mW or with standard coil and 200 mW.

Both series are sealed with epoxy and are suitable for wave soldering and subsequent circuit board cleaning. The single-pole changeover contact is designed for 1A switching current, its operating temperature range is between -40° and +70 °C.

Safety relay with explosion protection valid worldwide

01.07.2015/XNUMX/XNUMX | The safety relay modules SRB Exi from Schmersal are suitable for safe signal evaluation of emergency stop devices and for monitoring protective doors. So far, the signal relays have been approved on the basis of the Atex directive 94/9 EG valid in Europe and have successfully asserted themselves on the market for several years. Now they also comply with explosion protection requirements not only in Europe but also worldwide.

Coupling relay as interface between logic and load

04.03.2014 | Finder has developed a new generation of interface coupling relays with the 39 product series. Under the product name "Master Interface", the 6,2 mm narrow modules are available in 5 different versions as coupling relays in the input or output of the PLC, for connecting Sensors and actuators, with an additional slot for a security module or as a fully-fledged timing relay with eight functions. With the "Master Adapter", eight coupling relays can be connected via a ready-made Cables connected to the PLC.

Reduction of space requirements in switch cabinet, low assembly and installation effort, user-friendliness and interchangeable electromechanical relays (contact output 6 A) or semiconductor relays (SSR output up to 2 A) are the features of the 39 series EMC coil wiring, LED status display and integrated holding and dismantling lever.

All versions are available with screw terminals or now also with push-in terminals. This Connectivity Enables the quick connection of rigid or flexible cables with ferrules without tools. To release the wire connection, the unlock button is pressed with a screwdriver.

Optocoupler reduces circuit board area by 35 percent

The Master Basic and MasterPlus Finder relays can be used universally as coupling relays in the input to the PLC or in the output of the PLC to control actuators. With Master Plus, each coupling relay output can be secured with an individual, replaceable standard fine-wire fuse. MasterInput and master out with the coupling relay function, which protect a PLC from voltage peaks from the environment, do not require any additional DIN rail terminal blocks. master timer is a time relay coupling module with 8 time functions and 4 time ranges from 0,1 to 6 hours.

General technical knowledge

What is a relay?

relays are electromagnetic switches used to switch electrical or electronic signals on and off. They consist of a coil that generates a magnetic field that actuates a switching contact. Relays are available as openers, closers or changers. You will find in industry, telecommunications, Automotive industry and many other applications. They are particularly reliable and durable and offer a high switching capacity, which is why they are also used in safety-critical systems.