Because the contacts in a Reed Relay are hermetically sealed, the contacts can switch low level signals as low as femtoamps and nanovolts. It is an automatic switch when excited with an input signal changes the output circuit quickly. Rhodium offers superior low contact resistance, which, coupled with Cynergy3's copper plated reed switch technology, enables Cynergy3 to produce very low loss RF reed relays, with exceptional current carry performance. These are available with Tungsten or Rhodium contacts, depending on the switching requirements of the applications. By using DC coils, there may be a reduction in; the danger of incomplete restoration, the contact pressure, and the vibration resistance. In general, the point of a relay is to use a small amount of power in the electromagnet-- coming, say, from a small dashboard switch or a low-power electronic circuit -- to move an armature that is able to switch a much larger amount of power. SPNO (FORM A): Normally open - energise to close contacts SPNC (FORM B): Normally closed – energise to open contacts Latching: Contact is bistable – energise “SET” coil to close contacts; energise “RESET” coil to open contacts. Dry reed relays are made of coils wrapped around reed switches. Because of the smaller, less massive contacts and the different actuating mechanism, a reed relay can switch about 10 times faster than an electromechanical relay with equivalent ratings. Care must be taken when hand soldering to the contact terminals, as physical and thermal shocks can damage the glass to metal seals. A magnetic field is produced, when power is applied to the coil of a reed relay. The following guidelines should therefore be followed when adopting assembly, soldering and cleaning processes. Registered address: 7 Cobham Road, Ferndown Industrial Estate, Wimborne, Dorset, BH21 7PE, United Kingdom. Application Notes - Reed Relays High Voltage Reed Relays The principal function of a high voltage reed relay is to isolate as high a voltage as possible, Cynergy3 achieve this through the use of evacuated reed switches. Alternatively relays may be warmed prior to soldering. These are available with Tungsten or Rhodium contacts, depending on the switching requirements of the applications. Mercury-wetted relay • A mercury-wetted relay is a form of reed relay in which the contacts are wetted with mercury. Pickering's relay division has had considerable experience in picking the right reed to use to construct a relay. The standard performance measure of an RF reed relay, adopted by Cynergy3, is Effective Series Resistance (ESR); this is because these relays are very often used in high “Q” circuits, which experience high currents throughout the frequency range, as found in certain ATU circuits. 11642 Knott Ave, E-5 United Kingdom, Cynergy3 Components LLC Cynergy3 propose that either low residue fluxes are used in the soldering process (to eliminate the need for cleaning), or that the reed relays are fitted onto the PCB after the cleaning process has taken place. The switch in this type of relay must be mounted vertically Reed Relay applications continue grow every year de- spite severe competition from other small switching de- vices such as semiconductors and electromechanical armature style relays. Relays useful for applications where conservation of current is required. Coto Technology’s reed relay & reed switch manufacturing facility is located in Mexicali, Mexico. This is achieved through the use of copper plated reed switches, with Rhodium contacts, packaged in carefully designed coil assemblies. These relays are designed for use in the HF band and are typically used in HF amplifiers and aerial tuning units (ATU's). Applications of Electromechanical Relay. Cynergy3's range of RF reed relays are carefully designed to provide minimal RF signal loss and low contact resistance. It should be noted that any combination of voltage and current can be switched, provided they do not exceed the stated switching maximums, for either parameter or the power rating of the contact. The switching power, when quoted, will be for a resistive load. Browse: Portable Equipment. Partially screened relays will offer extended current carry capability at elevated temperatures and frequencies up to 30MHz, over unscreened variants, due to lower ESR. Please contact sales for further information on the suitability of various cleaning solutions. As a result, these are useful for battery powered equipment. The RF reed relays offered by Cynergy3 have various screening options: Unscreened relays maybe used in RF circuits where the highest currents occur at the lower frequency bands e.g. Rhodium contacts are offered, in our 'D' series range, for high voltage applications, where low contact resistance and good current carry performance are required, provided the switching voltage is below 1000 volts DC or AC peak. With Sanyu Electric, Nucletron represents the technology leader in the reed relay market. Tungsten contacts are used exclusively for our high voltage 'D' series range, where they are offered as high voltage switching contact able to switch voltages up to 10kV DC or AC peak at very low current. Cynergy3's range of RF reed relays are carefully designed to provide minimal RF signal loss and low contact resistance. Reed relays have also found numerous applications in RF and microwaveswitching applications. The following are some general guidelines, which should be considered when working and designing with Cynergy3's range of reed relays. Ein Reedrelais besteht aus einer Magnetspule, die meistens aus Kupferlackdraht gewickelt ist. It should be noted that many of the RF relays do not employ magnetic screening, as this can adversely affect the ESR; in this case refer to figure 3, for a suitable layout for RF relays without magnetic screening. COIL: An assembly consisting of one or more turns of wire around a common form . Cynergy3 recommend the following wave flow soldering profile: 250oC ±10oC, immersion time 3 seconds. These relays are intended for use in DC or AC (50Hz to 60Hz) applications. MERCURY WETTED CONTACT: A form of reed switch in which the reeds and contacts are wetted by a film of Mercury obtained by a capillary action from a Mercury pool encapsulated within the reed switch. Also the internal construction of the relay, including complete epoxy encapsulation, results in reed relays with insulation resistances of 1x10E+12 Ohm or greater, between mutually isolated terminals. The coil field moves the blade to the normally open contact blade which … Many of the RF reed relay designs are of open frame construction to achieve optimum RF performance, these designs need to be handled with due care to avoid damaging the exposed coil, contact and screen connections. Operate and release times for the relays are quoted with coil suppression fitted (unless otherwise stated). Alternatively Cynergy3 can arrange product testing to other MIL, DEFSTAN or IEC standards with various third party test houses for specific applications. 2MHz. The principal function of a high voltage reed relay is to isolate as high a voltage as possible, Cynergy3 achieve this through the use of evacuated reed switches. The reeds have contacts on their overlapping ends. The contacts are concealed inside a glass tube and its ends terminated out of the glass tube for external connection. Numerous applications demand switch contacts that are closed for long periods, only opening when a fault condition arises. The reed relays’s mechanical lifetime is also much higher than an electromechanical relay. We offer a wide array of reliable and cost-effective products from standard solutions to custom designs. Relay Applications. what is reliability? Portable EquipmentReed Relays. Fully screened relays offer the ultimate in low loss performance, resulting in the lowest ESR figures, significantly reducing the effects of RF coil heating, and maximising current carry performance at elevated temperatures and frequencies. Cleaning For selection of cleaners to be used on transfer molded reed relays, see the table. Coil Temperature Compensation Coil resistance, as well as 'Must Operate' & 'Must Release' voltages, is quoted at 20°C, unless otherwise stated. * Note: ultrasonic cleaning may cause permanent damage to the relay contacts . Surface contamination may result in poor conductivity for low-current signals. FRD12000/13000 Series: Electrical connections to the relay contacts on the FRD12000/13000 Series relays are made directly onto the reed switch leadout. The broad range of special reed relays ensures signal level, high current and high voltage applications can be handled extremely safely and precisely. Tungsten is a good general purpose switching contact material but the higher contact resistance means it is not well suited for RF applications. In reed relays, current applied to this winding generates a magnetic field which operates the reed switch . Reed Relay applications continue grow every year de-spite severe competition from other small switching de-vices such as semiconductors and electromechanical armature style relays. Portable Defibrillators - Reed Relay application describes how our reed relay series meet high voltage demands of portable defibrillators with low power consumption It should be noted that all data is presented, throughout, at an assumed ambient temperature of 20°C, unless otherwise stated. Some of them are latching relays, reed relays, power relays, thermal relays and high voltage relays. Electromechani- cal relays cannot do this because they are not hermeti … Ferndown Industrial Estate It should be noted that relays, used in a power switching application, will experience reduced operating life; it is recommended that sales be contacted for advice on specific applications. Various types of relays are used in various applications based on different criteria such as rating of contacts, number & type of contacts, the voltage rating of contacts, operating lifetime, coil voltage & current, package, and so on. Maximum exposure time 10 seconds. In switching applications where a semiconductor (transistor, UJT, etc.) All reed relay applications wholesalers & reed relay applications manufacturers come from members. to minimize magnetic coupling between the relay and external magnetic fields. Figure 3: Mounting Configurations to Minimise Magnetic Interference (Note Orientation). Cynergy3's reed relays are high performance products and the materials and methods of construction are significant factors in achieving performance specifications. The Series 104 is a range of Single-In-Line reed relays intended for voltages that are beyond the capabilities of conventional SIL reed relays. They are ideal for such applications as transformer or cable testing or any other automatic test equipment where high voltages are involved. Please contact sales for any particular requirements. is connected to the coil, a residual voltage is retained at the relay coil which may cause incomplete restoration and faulty operation. Reed switch also called reed relay, is a low current magnetic switch with a concealed pair of contacts that close and open in response to magnetic field near it. The isolation voltages quoted in the data are for DC or AC peak. reed relay applications. Relays are also available with different pin configurations like three pin, four pin and five pin relays. Very sensitive reed relays with high coil resistance. Figure 4: Recommended Mounting for "S" and "D" Series High Voltage Reed Relays. Reed relays are a an excellent choice for lower power switching applications because of their long life and fast operation. United States, © 2019 Sensata Technologies, Inc. All Rights Reserved. Because the contacts in a Reed Relay are hermetically sealed, the contacts can switch low level signals as low as femtoamps and nanovolts. A mercury-wetted reed relay is a form of reed relay that employs a mercury switch, in which the contacts are wetted with mercury. The 9006 Series is a general-purpose economy potted version of the 9001 for applications with less stringent requirements. Reed Relay; Reed Relays consist a set of magnetic strips which is closed within a glass tube. to two pins within the relay on each side of the switch . For high-speed applications, the mercury eliminates contact bounce, and provides virtually instantaneous circuit … It is recommended that a thermal shunt (Aluminium Clamp) be clamped to the reed switch lead out adjacent to the glass seal; this will reduce the chance of breakages due to thermal shocks. However, if they are used to hot switch some of these advantages may be lost as reed relays tend to have lower hot switch capacity than EMR's. Reed relays have continued in their uses outside the telephone industry, such as for automatic test equipment and electronic instrumentation due to their hermetic seal, fast operate time, extended life to 10 operations and highly consistent contact performance. The two may be considered directly equivalent, at mains frequency (i.e. These relays are designed for use in the HF … The Potted SIP relay is the industry choice for designs where economy and a great performance are desired in the same compact package. In general breakdown across the contacts occurs at a higher RF peak voltage than DC. They have some parameters that can affect the operation of the circuit, and if the right reed relay is to be chosen, its specification needs to be understood. Verification of any particular voltage or frequency combination, within the HF band (1–30MHz), can be undertaken upon request. Reed arrays passed out of use in the mid-1990s, being unnecessary in digital telephone systems such as DMS-100 and 5ESS switch. If after the soldering process the customer wishes to clean the PCB's containing Cynergy3 relays then the use of post operative cleaners such as IPA or HCFC based solvents with low pressure brush applicators is recommended. 9006 Series Potted SIP Reed Relays. The reed switch is composed of two overlapping ferromagnetic blades (called reeds) hermetically sealed within a glass capsule that is filled with an inert gas. Used to simulate the outer conductor of a coaxial cable for high frequency transmission . They are also used in applications … 7 Cobham Road When the coil is energized, the two reeds are drawn together such that their contacts complete a path through the … These relays are well suited for applications in Security, Instrumentation and Modems. Note that the 'D' Series has magnetic screening fitted as standard. There are numerous applications for electromechanical relays. Cynergy3 relays are not hermetically sealed (unless stated otherwise) and as such are not suitable to aqueous cleaning solutions or processes. Figure 4 shows a suitable arrangement for 'D' & 'S' type high voltage relays. switch to coil or screen), caused by surface tracking, can occur more readily at high frequency than at DC. The benefit of RF screening is that it reduces the RF through losses (ESR) of the relay and extends the relay performance, at high frequencies and high ambient temperatures. Experience has shown, for example, that ruthenium contacts offer much better performance than alternative contact materials except in higher current applications. Normally closed (Form B) reed relays. Reed relay specifications are different to those of other components normally found in electronic circuits. It has a biasing magnet so in the closed position, the relay coil draws no power. RRE Home » Reed Switch and Reed Sensor Applications » Types of Applications » Electromagnetic or Relay Type Reed Relay in Food Processor Application When it is necessary to control a circuit load by using a separate low-power signal, or where the states of several circuits must be controlled by a single signal, such types of Reed Switch applications can be classified are Relay Applications. It should be noted that these parameters will change at a rate of 0.4% per °C change in temperature. The normally closed (Form B) reed relay was designed for just such a situation. —}²ªrù¯ôî:Å»{Ø´Ã1. Conversely, breakdown outside the switch (i.e. 50 or 60Hz). We doesn't provide reed relay applications products or service, please contact them directly and verify their companies info carefully. This reed operates as both an armature and a contact blade.The magnetic field applied to the coil is folded around this tube that makes these reeds motion so that switching work is acts. Cynergy3 Components Ltd A reed relay is a type of relay that uses an electromagnet to act directly on reed-like contact of a reed switch contained within a glass envelope, typically bringing the reeds together to make contact when the electromagnet is energised. Â$‡Ä†Ûìz§ož©^'ùÖac óÆeéC|÷Ïb~KEÎþÝàèapbUÎg ¯ñz€ cczø endstream endobj 39 0 obj<>/Metadata 36 0 R/Pages 35 0 R/Type/Catalog/PageLabels 33 0 R>> endobj 40 0 obj<>/ProcSet[/PDF/Text]/ExtGState<>>>/Type/Page>> endobj 41 0 obj<> endobj 42 0 obj<> endobj 43 0 obj<> endobj 44 0 obj<> endobj 45 0 obj<> endobj 46 0 obj<> endobj 47 0 obj<>stream By definition, Electrical Relay is a switching device that can be used to open or close the contacts electrically. Reed relays can be supplied with changeover switches – the reed switch has a normally closed contact (when no magnetic field is applied) and a normally open contact (which closes when the field is applied). The reed switch closed contact uses the blade as a spring bias with a non ferrous spacer to avoid completing a magnetic circuit. H‰\“Ëjã@E÷úŠ^&‹ [ª®r@;/æÁxæd©íbI´å…ÿ~úꆌÀÖR×=UtçÛýnßw“ËÆ¡9„ɝº¾á:ÜbÜ1œ»>[®íšéóiþo.õ˜¥µ‡ûu Application Notes - Reed Relays High Voltage Reed Relays The principal function of a high voltage reed relay is to isolate as high a voltage as possible, Cynergy3 achieve this through the use of evacuated reed switches. Aleph Reed Relay Application Notes Handling Shock forces (e.g., drop from a height of 30cm or more) or application of high pull or twist forces to external terminals may result in permanent damage to relays. High voltage breakdown mechanisms at RF differ from those at DC. Reeds that are chosen in this way for the best performance are usually referred to as Instrument Grade reeds. The input signal may be heat, light, electricity and magnetism. Der Reedschalter sitzt in der Mitte der Spule. Wimborne Dorset BH21 7PE Many of the designs manufactured by Cynergy3 Components Ltd are used in Military and Defence systems therefore many of the relay designs have been tested for Bump, Shock and Vibration endurance to the following standards:-, Bump Test: EN60068-2-29:1993 (Or Equivalent), 40g 6ms Pulse Duration, Shock Test: MIL-STD-202G (Or Equivalent), 100g 6ms Pulse Duration Vibration Test: MIL-STD-202G (Or Equivalent), 20g 5-500-5Hz. Ferromagnetic screening can be used to contain this magnetic field, so allowing closer placement of reed relays on a PCB. RF Reed Relays. Coto Technology, Inc. originated in Providence, Rhode Island, USA in 1917 as Coto Coil Incorporated – a company specializing in the design and manufacture of coil windings. This is achieved through the use of copper plated reed switches, with Rhodium contacts, packaged in carefully designed coil assemblies. These are available with Tungsten or Rhodium contacts, depending on the switching requirements of the applications. Alternatively, for manual soldering iron operations: 350oC ±10oC, application time 3 seconds. Mercury reduces the contact resistance and mitigates the associated voltage drop. important issue when deciding if a reed relay is the best application choice . Garden Grove 92841, CA These relays are intended for use in DC or AC (50Hz to 60Hz) applications. Search our portfolio of Axicom Reed Relay V23100 -V4 products for for Low-temperature Applications and select your specifications. For such applications we have relays built with high insulation resistance reed switches. A rigorous reliability testing program is therefore a vital tool for providing our customers with technical support, and also for continuously improving the quality of Coto’s products . 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