by Viktor Safronov:
Sometimes you may need a group of switches where, if any switch is activated, it deactivates the previously active switch. This Design Idea implements such a function with relays.
This “one and only one” function is often implemented as mechanical switches in which an actuator (usually a movable metal bracket) is used to switch contact groups on and off. When any switch is pressed, this bracket first deactivates all switches, then activates the pressed switch.
Exclusively select 1 of N relays - [Link]
With its width of only 5mm is this relay able to switch 6A/250VAC, moreover at a minimum coil power consumption.
Thin as about a block of “Domino” and still so powerful and for a reasonable price – these are narrow relays series FTR-LY. Powerful and still so easily usable even in circuits with a 5V logic … Somehow this way could be described the well proven relays of FTR-LY series.
If you´d like to use a relay of this shape, then the FTR-LY series will probably also fulfill all your expectations regarding lifetime, reliability, low power consumption and other. When selecting a suitable type, it´s good to take in mind a material of contacts – on stock we keep three types (5V, 12V and 24V DC). A novelty in our portfolio – type FTR-LYCA005V has a „V“ suffix, what means AgSnO2 + Au (0.3µm) contacts. The biggest advantage of a golden layer on contacts is a very low minimum switching current through contacts (10mA/5VDC), in comparison to types with a suffix „E“ or „Y“, which have a minimum switching current 100mA/5VDC. Types FTR-LYCA012Y and FTR-LYCA024Y have in summary the same good properties, only they´re not suitable for switching of currents below 100mA (worse self-cleaning ability of contacts).
An advantage is up to 4000VAC (coil/ contacts) isolation and an isolation distance (clearance/ creepage) is 8/ 8 mm. To a reliability even in tiny areas on a PCB also contributes a max. operating temperature up to +85°C and a low power consumption (approx. 170 mW). Types, which we keep in stock are with one changeover contact (1CO, SPDT), that´s why they can be freely used in application where you need an NO or NC contact.
Upon order, there are also available types for socket and the PCB socket (JM-6N). It´s beneficial for applications, where we want to maintain a possibility to easily exchange a relay.
Detailed description can be found in the Fujitsu FTR-LY datasheet.
Narrow but strong – relay Fujitsu FTR-LY - [Link]
Finder monitoring relays are able to effectively signalize a fault status in a mains line and to prevent damages or undue wear-out.
Too high or too low voltage, phase loss or a wrong phase rotation are conditions commonly occurring in an industrial environment. Even though a phase rotation is usually stable, but only one improperly connected lengthening cable is sufficient …. These fault conditions harm to typical 3-phase devices like for example motors and as for a voltage out of tolerance – this usually doesn´t make well to any device. Devices like compressors and gas discharge lamps even don´t like too often switch on/ off (cycling) in case of fault conditions in the mains power line. There is a solution for all these cases – in a form of a simpler of a more sophisticated monitoring relay.
In our offer can be found high-quality components from company Finder – a producer with long-term experience in production of relays. To components intended for monitoring of mains line belong for example series F70 and F71, from which we keep in stock these types:
● 22.214.171.1240.2022 – 3-phase electronic monitoring relay. Monitors low voltage (adjustable), high voltage (adjustable), window mode (low + high voltage), adjustable time delay of switching (trip), selectable fault memory, phase loss, phase rotation. Comprehensive indication of all statuses by means of three LEDs
● 126.96.36.1990 – compact 3-phase electronic monitoring relay. Monitors phase rotation and phase loss.
● 188.8.131.520.1021 – 3-phase monitoring relay. Monitors low voltage (adjustable), high voltage (overvoltage), adjustable time delay of switching (trip), selectable fault memory.
All above mentioned types have on their output a small relay (6 or 10A), which can serve for controlling of a main contactor or directly for switching of other devices in case of faulty status. Adjustable time delay at types 70.31 and 71.31 functions in a way that after detection of a fault a relay “waits” for a selected time and if a fault still persists, the relay will switch on an output contact. In other words – monitoring relay ignores faults shorter than a selected time (0.5-60s at type 70.31 and 0.1-12s at type 71.31). This function is very useful to prevent an undue frequent switch on/off of devices, which are able to withstand a short-time fault status without a damage.
Memory function is also a useful function, which – if active, will prevent a repeated start of a device. This is very important for example at devices, which mustn´t be switched on without an operating personnel.
Detailed description can be found in datasheets at particular types.
Relay Finder will let you know, when one phase is missing … – [Link]
Switching of three-phase motors or a realization of a sophisticated installation is a breeze with industrial relays Finder.
As we know, a relay is a very versatile component, able to realize also various “sequential” circuits, when for example by switching one relay we´ll switch on a target device and at the same time we´ll enable (or disable) switching of another relay. In these case, it´s an often demand for a relay to have a sufficient number of poles. Majority of such “logic” circuits can be realized even with a common 1-2 pole relays, but it´s not always economical and it also brings another costs for solution of supplying and protection of logic circuits.
- Finder 55 – miniature industrial relay for a PCB or for socket, 2-4 poles, 7-10A (switching current up to 20A), 250/400VAC,
- Finder 60 – a more robust industrial relay for a socket, 2-3 poles, 10A (switching current up to 20A), 250/400VAC,
In the series 55 can be found types which can be soldered directly into a PCB (without a socket) or to insert into some of many available sockets (for PCB, with soldering pins or on a DIN rail). Types from series 60 need to be inserted into a socket (for PCB, with soldering pins or on a DIN rail). Naturally, for eventual repair/maintanance, it´s much better to use a socket. Sockets can be equipped with metal or a plastic clip. Also exists a socket 94.94.3 with a safety separation of an input and output part. Similarly like at majority of Finder types, sockets can be equipped with optional protection and indication modules. Read the rest of this entry »
Low losses, precise design, low power consumption and moreover a very affordable price are one of several reasons saying for the signal relays from Fujitsu.
Despite a big advance in a segment of semiconductors, there are still many reasons for usage of electromechanical relays. Galvanic isolation of a driving signal from a switched signal, resistance to surges, minimum crosstalk among switched signals and a minimal or no distortion are main arguments for a classic relay.
In fact a word “classic” even isn´t appropriate, because development of relays is still in progress and it brings results in a form of small dimensions, higher lifetime, low power consumption, high isolation strength etc., that´s why many modern types overcome their predecessors quite significantly.
We´d like to focus your attention for example to series FTR-B3 and FTR-B4. Both are ultra- miniature with a low power consumption and highly reliable bifurcated gold-plated contacts. A big advantage is, that both series also contain latching types with a „zero“ power consumption, thus requiring only a short pulse at switching. In respect to miniature dimensions and an affordable price, their usage is beneficial not only for a signal transmission, but also for example for driving/ switching of various processes and similar.
Connect a signal without distortion – via a Fujitsu relay - [Link]
From time to time I get requests to make some high power switching, so I decided to design a solid-state relay that could handle a lot of different situations. The most common use for it I have is refurbishing old ceramic kilns. Since our technical life is close to the stage (both theatre and music), I also wanted it to be usable as a dimmer module. And, just for kicks, as a single phase AC motor speed controller, in case we would want that.
A solid-state relay with I2C interface - [Link]
Web-based relay controller for home automation.
Home automation is getting increasingly popular these days mainly due to reduced cost and simplicity through web or smartphone connectivity. Here’s a DIY version of web-based home automation controller that allows you to have a set of six relays connected to the end of a piece of Ethernet cable that can be accessed from a web browser anywhere from your house. You can use it to control or program the operation of lights, water pumps, or any other electrical appliances at home. The project uses Arduino (Atmega328) microcontroller and the ENC28J60 ethernet controller chipset.
Web-based relay controller for home automation - [Link]
500, 400, 300 mW are common values of coils power consumption of mid-power relays. But JV-xS settles for 200mW and operates even at 113 mW!
Power consumption of for example 500 mW is low at the first sight and it may seem, that at a power consumption of other power circuitry it somehow “disappears”. Sometimes it maybe really is a relatively negligible value, but in many cases the power consumption matters very much. Apart from a general trend of power consumption reduction, a lower consumption enables for example a longer operation from a backup source at a voltage dropout. Moreover at arrays with several relays an overall consumption easily reaches even tens of Watts, what may bring for example problems with heat dissipation in summer season and similar.
Relays Fujitsu series JV-xS are quality relays of a mid power (5A) with a maximum switching voltage of 250VAC/ 1250VDC with a very sensitive coil. Small dimensions and a low profile (only 12.5 mm) contribute to versatility of the relay. Despite small dimensions provides JV-xS a high level of safety thanks to 5000VAC isolation strength (coil/ contacts) and construction from a self-extinguishing plastic.
JV-xS series is available with DC coils from 3 to 24V (JV-3S… JV-24S). Besides common versions for 5, 12 and 24V it´s possible to find in our store also the 9V version JV-9S-KT. Uponrequest we´re able to provide you also any other available versions. Detailed information will provide you the Fujitsu JV datasheet.
In case of interest, please contact us at firstname.lastname@example.org.
Save energy with sensitive relays Fujitsu JV series - [Link]
drj113 @ instructables.com
Yep – One of those! This Instructable extends my Arduino Ethernet controller to control a set of up to 6 relays, but that’s not the neat bit. The neat bit is that there is a web based state machine in the AtMega chip so that the relays will operate in whatever sequence with whatever timing you want – all by themselves. This allows you to have a set of relays connected to the end of a piece of Ethernet cable that can be accessed from a web browser anywhere from your house.
A Remotely Programable Relay Controller - [Link]
A well known reliable PCB relay can be now found in our store in the version V23084-C2002, fully usable in demanding automotive applications.
Previous version of widely used relay V23084-C2001 we introduced to you in the article Automotive relay for PCB used by leading world producers. However after many years of production this relay has appeared in the obsolete category, that´s why we enriched our stock with its near relative – V23084-C2002-A403, TE Connectivity ordering no. 1393267-2. The difference is in the coil sensitivity and in the material of contacts. New type has a coil switching already at 5,8 V and contacts are on the AgSnO2 basis. Because of different contacts material, the maximum continuous current is 2x18A, what is in about 10% lower than at previous version, but in praxis this limitation shouldn´t occur in the most of applications. A good information is a considerably lower price of this version.
Specified temperature range corresponds to industrial range -40 to +85°C. Typical segments of usage are car alarms, door control and locking, control of seats, windows and wipers, and various other low voltage applications with higher current demands.
Detailed information will provide you the V23084-C2002-A403 datasheet. In case of interest, please contact us at email@example.com.
Favorite automotive relay V23084 in a new cloth – [Link]