SDS Universal printed circuit board relay Mono- or bistable Power switching range from 1nW to 1KVA New 5 layered twin linear contacts Voilumetnc/contact resistance S-Relay SUPERB RELAY TECHNOLOGY Sealed plastic enciosure IP67 _ 4, | we ght aporox 7g V7 7 2. approx 30/20 mQ p-c b hole da@t13+01 Tc Highly efficient t p-c board stand . - Good HF and -> capacitance value 15 pF : oO 4 | 7 77 2 Le L } view an connection side Low thermovoltage approx 2 or< 1uV ly be T jt a -2 ao o o ~ S. 100 A (1ms) short circuit capability 0 | po 2 3 4 5 6 7! 7 AM Long + operational life Te eR uo we 8 8B 8 = | (up to 2x10 operations) bs SoES ' a 284 - es Data sheet The arrows refer to more specific information in the text __max dim { t Ratings Max current make/const /break A 20/5/5 Test voltage contacycontact/coll Vett 750 /1500 Max break voltage v 250 Upper temp limit (max storage temp ) c + BS Max break power without + contact protection W(VA) 100 (1000) Permissible ambient temp for 100% utilisation c -55/+65 Shock/vibration resistance g-g/Hz 0-20 / 1000 Thermal resistance KIW 65 Pick up/drop out/bounce time $2/S3 S4 ms 8/5/1|9/5/2|10/5/2, LifeO1A, 10Vdc/4A 250Vac operations 2 108/105 Pick up/operating power, bi/monostable mw 50-100/100-200 Life at various loadings (see fig 4) insulation resistance 500 Vdc Q 1910 Efficiency) = eee ee ame at 105 operations 5700 (11400) 7 1 Type $2 i $3 i S4 S$2-L $3-L S$4-L {| $2-L2 . S$3-L2 $4-L2 | J Contact arrangement 2NO+2NC 3NO+1NC 4NO 2NO+2NC 3NOQ+1NC 4NO 1 2NO+2NC 3NO+1NC 4NO ; {2CO) (2NO + 1CO) (2CO) (2NO + 1CO) (2CO) (2NO + 100) ' - woe eee - = a - Connection diagram foo + 1 + Loo + viewed from wiring side wo om 00 o~ 09 om | wo om ec on WO On | COOmOnN COMMOKR OOmON Attention to polarity! _ _| inO%) Om mO+) Ow w OF, (400 INOW 1 HO@ woe +OD WOH 40m [Pe OD NOH 40D MO* #O@ \ to ! ' | The contact configuration given in a CS o Loe o! Loo ' _ ; i \ : brackets 1s achieved by p-c-board ~ 7 * Om OD SH OD OM OD FO ON OM HOD I O OM connection of pins 3/4 on $3 or 3/4 and m 2g mom poe mo pOokimo~ Cf ~> OF MO OCL[mo, O22 MO -02 MO, -~oo 9/10 on S2 Parallel switching of contacts | (or poo vi \ _ . _ _ ' on i _ Increases permissibie current Senes = NOMNHOD NOFNEOD | NOOR No FOR NO Lox Noel kor NO eOD NOW HOT switching increases voltage capability -OmmOoN NS -OmmboO | -OmmeON OmMmON -CO-mmOn I - N -OmmOon -OMmMmON + I + | + | + { _ | + 1 + 17 + \ + | Switching parameters Monostable relay, shown de-energised Switched by application of correct indicated polanty Switched after tmpulse ( Bistable relay with 1 or 2 coils Contact operation after or during excitation by 8 ms) or permanent excitation of a coil poiarity with opposite polanty or C-circurt (fig 10} i Collvoitage ft Coll- | _ Coll- rated pick up drop out permiss- resi- no of Induc- permiss- resi- no of Induc- permiss- rest- no of turns Induc- voltage voltage voltage tble stance tums | tance ible stance turns tance | ible stance ' tance at20C at20 C voltage = 10% = 10% voltage = 10% =10% jvoltage percoil coil! coll! per coil at 40C at40-C at40 C =10% = 10% Vv Vv v v Q H Vv Q H v Q H _- we ee fo a - - - le - a -_ Loe oe eee p15 ae O15 | 27 1938 700, 0008 G42 225 810 9009 | 36 143 400 = 400 0.002 3 ~ 21 030 | 59 _ 45 1400 | 0023 84 90 1700 0,04 | 59 _ 45 800 800 =~001 5 35 | 95 101 130, 7 2350 0.065 _153 300, = 3100 014 | 101 130 1500 1500 0031 6 . 42 . O6 4 119_ 180 2800 0093 168 = 360 3100 = O14 | 119 180 461700 = 1700 004 9 _63_ 09 A777 400 4050 0194 250 _ 800 4700 =031 | 177 400 2500 2500 0087 32 4 12 }_237 | 720 | S600 087 | 837 1450 6500 OG; 237 720. 3600 __ 3500017 16 4112 16 - 297 1130, = 7550, 0673 | 419 2250 = 7700 0 85 | 316 1280 4350 4350 0235 24 168 _ 24 472 2850 11000 1427 667 5700 12000 205 | 472 2850 , 7000 7000 068 48 33 6 48 815 asoo0 17000 341 41110 16000 25000 89 1 713 6500 9500 10000 125/139) i i F , ; 7 ' Ordering example PFICES (exci VAN in gipce in atys of + | 80 100 500 1000 5000 : 10000 $2-/83-/S4- 15,3,5,6.9 12V S2-L-12V x. - -- - _ 16 24V type (see connection diagram) woo 4av a | $2-L-/S3-L-/S4-L- 15,3,.5,.6V coil voltage a Se 912V_ _ ; So 7 16,24 V Approvais: Po aa ne con noes E 43028 $2-L2-/$3-L2-/S4-L2- 15.3.5 6V ALR 26550 wo ~ - aay . . - ~ ns TTT VDE 0435/0110 eee ee oe 8 12M . ee ee - - Insulation class C to 250 Vac (300 Vdc) for circuits not oo ee 16,24 _ - connected to the main system network - 48 oo ~ oe ~ insulation class B to 125 Vac (150 Vdc) for circurts ~ ~ a ee ee Te ~ TT 7 - connected to the main system network | Plug-in socket type S-SS,S-NS_ _-- - - - Active plug-in socket type S-NS - 12,24 Patents: A 357622 AUS 472096, 496595, 502682, BR 7308012, CDN 1008904, 1027155, 1037532,CH 571273 599679, CSSR 185214,D 2345638, 2454967, DDR 109766 117562, E 421697, F 2225827, 2271654, GB 1456861, 1456 862, 1456863, 1506284,1 995850, 1038135 IAL 39962,R 76316,S 396503, 407305, UDSSR 704483 778718, USA 3946 347, 3993971,ZA 73/9725 \ Ali statements and data have been carefully tested by modern methods There could, however, be some devia- tion due to product tolerance spread Unless agreed in writing, all statements are nonbinding We reserve the right to make changes as deemed necessary Our Terms and Conditions of Sale appty Directors JG Napies (Managing), Or U Mossner Registration No 1591381 Registered Office SDOS-RELAIS LTD, Milton Keynes SDS-RELAIS LTD 17 Potters Lane, Kiln Farm Milton Keynes MK11 3HF, England Tel (0908) 567725 Telex 826685, Telefax (09 08) 569097 Prnted in Germany Dec 1987/AS relay Reliability and operational life features The relay is an example of how the quality of a relay type can be dramatically im- proved by close attention to design and manufacturing detail Both purchase price and operational costs have been reduced whilst efficiency and life expectancy have been dramatically increased A higher contact pressure with lower exctation has been achieved by combining a permanent flux and the excitation flux with four armature airgaps The stored permanent magnetic force in the contact springs has increased the contact quality and efficiency The twin linear contact configuration as shown in fig 1 guarantees low constant contact resistance and capacitance, fixed contact dimensions during along opera- tional life, a high short circult capability of 100 A (1ms), and hence exceptionally high contact reliability fig 1 Twin linear contact Life duration % F(t) Weibull break-down probability vse IYI /L I A new 5 layered contact design (fig 2) permits the switching of all loads between tnAand5AatimVto 250Vdc orac up to 100 W (or 1kVA) and ensures a long opera- tional life Compared to the point contact style of contact, the twin linear contact configuration offers an approximately 5-fold increase In wear resistance due to its 5u solid gold layer Hence the S relay 1s suitable for up to 10 operations at loads of 2 A, 15 V What is more on 40 test cycles each of 10* operations at 15 V, 2 Aand 105 operations at 30 mVac, 10uA, it gave in total 4 4 x 10 fault-free swit- ching operations The contact configuration has reduced the contact > bounce time (fig 3) to, on average, below 01 ms The contact resistance of the sealed S relay remained dunng test below 20 mQ after 1000 hours immersion in 3-5 ppm H2S at 40C and 95% relative humidity The sealing consistency test complying with AQL 15 was carned out by submersing the relay in Flour- a) 0 005 AuAg 10 for dry switching b) 0 06 AgNi 15 for tow/medium loads ) 014-0 2 AgSnO2 9 3 or AgCdO 10 for high andac loads d)0025Agmin 998 bonding jayer between layers c&e e@) Remainder CuNi 30 for heat dissipation and continued operation following wear of the overlayers fig 2 New design of 5 Jayer contact AI fig. 4 Weibull reliability data for various contact loadings with a cntical break point at 100 mQ, unless stated otherwise a e 5 107 No of operations oe 5 108 107 2 107 198 Contact resistance during operational life mQ Volumetnc resistance 40 30 4A 250 V ~ 20 10 2: 10 10* 10 2 10 5 10 10 STATON 5 10 10 2 10 No of operations 2 10 5 10 10 2107 Carbon at 70C for 3 Minutes This resulted in no bubble formation The test thus satisfied condition Qc2 of din 40046, page 15, point 33 | The minimum creepage path of the dual- in -line mounting pins is 3 7 mm and this fulfils insulation group C up to 250 V * The strong mounting of the armature bearing on tts shaft guarantees high shock and vibration resistance The pick-up and drop-out values remain in tolerance during the operational life (See diagram on pick-up/drop-out times on page 3) to No of tested type $2-24V relays 16 12 - 8 | , 4 7,29 2.141 ! i 5 | t I 0 0,05 0,1 0,15 0,2 0,250,3 0,35ms fig 3 Histogram of bounce times Load-limite-curve 1000 . DC load ne load > @ 100 a 2 9 f > \ 2 UU = 2 = 10 n 0,1 1 5 Switching current A 10 2 fig 5 Contact resistance conditions at 4 A, 250 V a.c After 18000 operations the volume resistance (contact + line resistance) amounted to 20 mQ and after 10000 opera- tions it increased to 38 mQ At low loads the contact resistance remained practically con- stant dunng the 10 operationsS relay - The multi featured relay HF characteristics The relatively good HF charactenstics of this S relay are due to the following Low -> capacitance Short twin contact finger springs High through power Low contact resistance Contacts shielded from armature By series connection of the contacts the cross-talk attenuation can be improved Thermovoltage At normal coil excitation after 30 min at 25 - 29C and 60 75% relative humidity typeS2 Connections 4-5 10-11 Uth [uV] 13406 2+1 typeS4 Connections 2-3 4-5 8-9 10-12 Uth + 0,3 [uv] 23 1,5 1,8 1,9 Pick-up/drop-out times + 20% ms 12 S84 $3 $2 1a toick-up 8 6 $3 4 s2 2 $4 tdrop-out 0 80 100 u 120 140 Uy Ml dB - 60 cross talk attenuation return current co-efficient 30 2 -20 won VSWR insertion loss 1-107 . 10 50 100 frequency MHz fig 6 HF characteristics of the S relay With impulse operation of bistable S relays or switching via a C switching network (fig 10) the thermovoltage < tuV Temperature influence change factor pick-up 13 voltage 20 40 60 80 100 ambient temperature C Example A relay with a pick-up voltage of 8 V (20C) picks up at12x8=96Vat60C and at-40C atO8x8=64V Contact protection for d.c. operation The following contact protection circuit Is recommended to increase the contact life when switching high loads PT R, = Load resistance Re = Discharge resistor sc if | Thus itis then possible to switch loads con- siderably in excess of 100 W To completely suppress an arc the value of the capacitor should be approx. 1uF per ampre of switch- off current Thus with a current of 5Aa47 uF capacitor should be used The size of the discharge resistor Re depends on the switching voltage and frequency Generally care should be taken that charging current + contact current are kept below 20 A. The overload current capacity of the diode must exceed the switching current. Historical experience with the S relay At ,Electronica 74 the S relay was still the wRelay of the future In October 1975 the first unit was delivered and today it has become one of the most specified relays on the worid market The S relay is unique tn many respects, for its high efficiency, the switching range of bet- ween 1nW to 1kVA or its universal accepta- bility for mono- or bistable switching require- ments with 4 contacts of various confi- gurations Since additionally it is hermetically sealed, has good HF charactenstics and alow thermovoltage as well as being energy saving and highly reliable tn operation, it finds wide use tn such fields as measurement, control, information, signal and process technologies S relays can also be used as coupling and linking elements within electronic circuits as well as interface relays for microprocessors or as storage elements Capacitance values + pF contact ungrounded 0,7 contact (coil grounded) 0,35 coil/fixed contact 1,15 coil/fixed contact (moving contact grounded) 0,9 coil/moving contact 1,4 coil/moving contact (fixed contact grounded) 1,15 contact set/contact set 0,6 contact set/contact set (col grounded) 0,1 Coil heating (after 30 min switching) Atc contact current A 70 5A 60 | NO & 50 40 30 20 Oo 10 a 0,2 0,4 06 excitation power W 0,8 1 lf 4 contacts are simultaneously carrying 5A then with normal excitation of 0 2 W, the max ambient temperature can be 50C 4 The rejection rate has sunk from an initial value of 1% to the current level of below 001% Only the sales price has tn real terms, fallen by 15% since 1975 The supply Is secured since S relays are now manufactured in West Germany, Japan and soon also in the USA Due to the surface characteristics of the high quality goid contact assembly it is recommen- ded that ultrasonic cleaning methods be avoidedOperation of the S relays The S relay has a rotating armature A permanent magnetic field is superimposed with the excitation flux across 4 airgaps This results in high efficiency and contact pressure at low energising power With monostabie S relays the opposite pole faces are dissimilar Fig 8 shows the switching operation with mono or bistable configurations with one or two coils depending on the polarity of the exciting voltage Thus at any given time a NO and a NC con- tact are linked like a changeover contact For NO contacts, the top half, and for NC contacts the bottom half of the time axis is used The excitation pulses ABEFHUL indicate thata monostable polansed relay with constant polanty applied operates in normal circum- stances like an un-polansed relay Changing over the polarity at the coil does not affect the contact operation Bistable relays change the contact position with the applied voitage polarity and remain in that state even when the excitation voltage !s interrupted Uses Amplifiers, choppers changing sine waveform into rectilinear pulses (FGH) Bistable relays with two coils permit partt- culary elegant efficient solutions to switching + eet [A] [B E] /F H\_ [a L 2_{ 3 + coil T Cc D G ! + T K M epee T;~ ls bet Ta yy a b i 2 T, =~ er a] aot T, a2) So oF { Sif T-| 8 T, om ae aH ET 3 b L 39 | +-T; Tj . . ee fig 8 Switching mode of various S relays with an example of a NO and NC contact or alter- natively of a combined changeover pair Special user examples of the S relay tow aren aN _ ~ > 7 Te If the electronic switching element shown in fig 9 Is connected with a relay of type S2-L2, $3-L2 or S4-L2, then the relay assumes the properties of a latch relay eg with an impulse of the same polanty the relay swit- ches momentarily in the opposite sense A relay contact is used tn this control circurt All other data on the S relay remains the same 24 mT 3 pat? 1 Tol 40,3 \ Dimensions 185x33x63mm + basic gnd 2 54mm p-c board hole dia@og fig 9 VS Electronic module Plug-in socket type SNS For p-c board or chassis mounting 13-01 code 12,4 = - i . ne 35,4 - 0,25 14-08 | a oF a i 8,5 = 01 4 7 p-c board hole dia13-+ 01 chassis punching 12 6x 331+ 01 f 2762 be spring clip _. 15,08 - 01 Plug-in circuit with C switching circuit S2urma-mogen rsiay 7] 99% saving of energising power 7 Thermovoltage < 1uV at 100% operation 3 Pick-up/drop-out time approx 3 or 2 ms 33 Ratio, pick-up/drop-out voitage approx 1 2 The C switching circuit shown In fig 10 bestows monostable operation on bistable relays so that only dunng the pick-up time is there any power consumed (See SDS IC data sheet) See also plug-in socket with C switching 4 +12V od +24V 83 -4 +5V 259 UL a) (2.27 Dimensions 2,54 Ixbxh=5x18xdmm fig 10 IC for C switching p-c board hole dia@ 0 8 The S-NS is also available with an in-built C switching circuit to become an active plug-in socket for, 12 V and 24 V coil voltages. It bestows monostable switching capability on single coil bistable relays whose rated coil voltage is approx. 50% less. e.g. relay S$2-L-6 V for plug-in socket S-NS-12 V excitation voltage. > Ultra modem relay. The internal connection of the C switching circuit are shown in blue. Control is made via connections 7 (+) and 12 (). When using the active S-NS tn existing p-c boards which have been designed for S2- and S$4-relays the S-NS socket must be turned tn reiatton to the p-c board by 180. fig 7 Magnet system of the S relay problems eg Ifacoilis pulsed for > 4 ms then a contact will open or close as appropnate until the other coil is pulsed with the opposite polanty Excitation voltage on coll ! t Exeitation voltage on coll il Monostable S relay type S2 (2NO, 2NC contacts} t type $3 (3NQ, 1NC contacts) type S4 (4NO, contacts) also see relays with C switching Bistable relay with | cotl t type S2 (2NO, 2NC contacts) type S3 (3NO, 1NC contacts) type S4 (4NO contacts) Bistable S relay with 2 coils t type S2 (2NO, 2NC contacts) type $3 (3NO, iNC contacts) type $4 (4NO contacts) T, = pick-up time Tg = drop-out time T3 = response time Tg = transition time As time relay By using the C switching circuit and parallel switching of the capacitor at the input to the IC module, it is possible to increase the drop- out time to approx. 30s The achievable drop- out time delays are then =~ 0 26 s/uF Plug-in type S-SS p-c board hole dia 1mm 1 : I | ' I i ! Distributor r t \ | 1 | {