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engineering data sheet m320 relay - nonlatch 1 pdt, 25 amp application notes: 001 007 023 applicable socket: s320 polarized, non latching hermetically sealed relay contact arrangement 1 pdt coil supply direct current meets the requirements of mil-r-6106/19 qualified to cecc16101-031 cecc16103-809 principle technical characteristics contacts rated at 28 vdc; 115 vac, 400 hz weight 45 grams max dimensions max. of case in mm 26 x 25.7 x 13.3 balanced-force design hermetically sealed, corrosion protected metal can contact electrical characteristics minimum operating cycles contact rating per pole and load type load current in amps @28 vdc @115 vac, 400 hz 50,000 cycles 10,000 cycles 50,000 cycles 50,000 cycles resistive load inductive load (l/r=5ms) motor load lamp load 25 12 10 5 25 12 10 5 50 cycles resistive overload 50 80 200,000 cycles at 25% rated resistive load featuring leach ? power and control solutions www.leachintl.com americas 6900 orangethorpe ave. p.o. box 5032 buena park, ca 90622 . . tel: (01) 714-736-7599 fax: (01) 714-670-1145 europe 2 rue goethe 57430 sarralbe france . . tel: (33) 3 87 97 31 01 fax: (33) 3 87 97 96 86 asia units 602-603 6/f lakeside 1 no.8 science park west avenue phase two, hong kong science park pak shek kok, tai po, n.t. hong kong tel: (852) 2 191 3830 fax: (852) 2 389 5803 data sheets are for initial product selection and comparison. contact esterline power systems prior to choosing a component. date of issue: 9/07 - 157 - page 1 of 4
coil characteristics (vdc) m320 code a b c n nominal operating voltage 28 12 6 28 maximum operating voltage 29 14.5 7.3 29 maximum pick-up voltage at +125 c 18 9 4.5 18 maximum drop-out voltage at -65 c 1.5 0.7 0.35 1.5 coil resistance w 10% at +25 c 320 80 20 320 back emf suppressed to (vdc) n/a n/a n/a -42 general characteristics temperature range -65c to +125c dielectric strength at sea level - contacts to ground and between contacts 1250 vrms / 50 hz - coil to ground 1000 vrms / 50 hz dielectric strength at altitude 25,000 m (all points) 350 vrms / 50 hz initial insulation resistance at 500 vdc 100 m w min. sinusoidal vibration (except g and o mounting) 30g / 75 to 3000 hz sinusoidal vibration (g and o mounting only) 20g / 75 to 3000 hz shock (except g and o mounting) 200g / 6 ms shock (g and o mounting only) 50g / 11 ms maximum contact opening time under vibration and shock 10 s operate time at nominal voltage 10 ms max release time 10 ms max bounce time 1 ms max contact voltage drop at nominal current - initial value 150 mv max - after life 175 mv max date of issue: 9/07 - 158 - page 2 of 4
mounting styles m320 dimensions in mm tolerances, unless otherwise specified, 0.25mm terminal types d a t e o f i s s u e : 9 /0 7 - 1 5 9 - p a g e 3 o f 4 = = 3 5 . 5 3 6 . 7 4 4 m a x ? 8 m a x = 1 5 . 9 = 1 . 2 m a x 1 2 . 3 m a x j 1 2 . 7 3 . 8 1 2 6 m a x a 4 0 . 5 c o n t r a s t i n g b e a d 1 2 . 3 m a x 1 3 . 3 m a x m 3 2 2 5 . 7 m a x ? 5 g : u n c o : s i m 3 . 5 4 4 m a x m 3 . 5 o r 6 . 3 2 u n c 2 a 9 . 5 7 . 5 0 . 1 5 4 3 5 . 7 0 . 1 5 b 0 . 1 5 4 3 . 8 0 . 1 1 4 4 m a x 3 5 . 5 3 6 . 7 d 0 . 5 7 . 1 m a x 6 . 3 5 1 0 . 5 7 . 6 9 . 5 ? 2 . 3 6 ? 1 . 6 1 6 5 . 9 5 . 0 8 0 . 0 5 + 0 . 0 3 - 0 . 0 5 s i l i c o n g a s k e t s h o r e a 1 5 - 3 0 0 . 5 1 5 . 9 2 1 . 3 0 . 1 ? 2 . 3 6 0 . 0 5 ? 1 . 0 1 ? 2 . 3 6 + 0 . 0 5 - 0 . 0 2 5 ? 1 . 6 0 . 0 5 0 . 0 5 4 1 1 t i n p l a t e d p i n s s o l d e r h o o k s g o l d p l a t e d p i n s
schematic diagram m320 numbering system m320 a 1 a c er basic series designation__________________________| | | | | | 1-mounting style (a,b,c,d,j,k,g,o,r)____________________| | | | | 2-terminal types (1,2,4,8)__________________________________| | | | 3-coil voltage (a,b,c,n)________________________________________| | | 4-see note [4] below________________________________________________| | 5-see note [5] below____________________________________________________| notes 1. relays with mounting styles b,d and terminal type 4 are compatible with socket families s320... 2. isolation spacer pads for pcb mounting available on request. 3. for other mounting styles or terminal types, please contact the factory. [4]. options - c: circuit breaker compatibility 30 a / 1 hour; 50 a / 5 sec; 100 a / 1.2 sec 250 a / 0.2 sec; 350 a /0.1 sec - d: low level: 10 a / 10 mv [5]. quality level: - d005: model qualified to cecc16101-031 - d006: model qualified to cecc16103-809 - er: please contact factory. typical characteristics l coil resistance/temperature change: see application note no. 001 d a t e o f i s s u e : 9 /0 7 - 1 6 0 - p a g e 4 o f 4 1 - x 2 2 3 a + + x 1 c e + x 1 + a 3 2 - x 2 1 c e : c o i l s u p p r e s s i o n n c o i l b o t t o m v i e w , d e - e n e r g i z e d c o i l
application notes n001 correction due to coil copper wire resistance change in temperature example: coil resistance at 25c: 935 ohms. what is it at 125c? correction coefficient on diagram is: 1.39 at 125c. r becomes: 935x1.39=1299 ohms correction also applies to operating voltages date of issue: 3/06 - 1 - page 1 of 1 -80 -30 20 70 120 170 1.8 1.6 1.4 1.2 1 0.8 0.6 correction coefficient temperature ( c) nominal resistance at 25c nominal resistance at 20c
application notes n007 suppressor devices for relay coils the inductive nature of relay coils allows them to create magnetic forces which are converted to mechanical movements to operate contact systems. when voltage is applied to a coil, the resulting current generates a magnetic flux, creating mechanical work. upon deenergizing the coil, the collapasing magnetic field induces a reverse voltage (also known as back emf) which tends to maintain current flow in the coil. the induced voltage level mainly depends on the duration of the deenergization. the faster the switch-off, the higher the induced voltage. all coil suppression networks are based on a reduction of speed of current decay. this reduction may also slow down the opening of contacts, adversly effecting contact life and reliability. therefore, it is very important to have a clear understanding of these phenomena when designing a coil suppression circuitry. typical coil characteristics on the graph below, the upper record shows the contacts state. (high level no contacts closed, low level nc contacts closed, intermediate state contact transfer). the lower record shows the voltage across the coil when the current is switched off by another relay contact. the surge voltage is limited to -300v by the arc generated across contact poles. discharge duration is about 200 mircoseconds after which the current change does not generate sufficient voltage. the voltage decreases to the point where the contacts start to move, at this time, the voltage increases due to the energy contained in the no contact springs. the voltage decreases again during transfer, and increases once more when the magnetic circuit is closed on permanent magnet. operating times are as follows: time to start the movement 1.5ms total motion time 2.3ms transfer time 1.4ms contact state date of issue: 6/00 - 8 - page 1 of 4
types of suppressors: passive devices. the resistor capacitor circuit it eliminates the power dissipation problem, as well as fast voltage rises. with a proper match between coil and resistor, approximate capacitance value can be calculated from: c = 0.02xt/r, where t = operating time in milliseconds r = coil resistance in kiloohms c = capacitance in microfarads the series resistor must be between 0.5 and 1 times the coil resistance. special consideration must be taken for the capacitor inrush current in the case of a low resistance coil. the record shown opposite is performed on the same relay as above. the operation time becomes: - time to start the movement 2.3ms - transfer time 1.2ms the major difficulty comes from the capacitor volume. in our example of a relay with a 290 w coil and time delay of 8 ms, a capacitance value of c=0.5 uf is found. this non polarized capacitor, with a voltage of 63v minimum, has a volume of about 1cm 3 . for 150v, this volume becomes 1.5 cm 3 . date of issue: 6/00 - 9 - page 2 of 4
the bifilar coil the principle is to wind on the magnetic circuit of the main coil a second coil shorted on itself. by a proper adaptation of the internal resistance of this second coil it is possible to find an acceptable equilibrium between surge voltage and reduction of the opening speed. to be efficient at fast voltage changes, the coupling of two coils must be perfect. this implies embedded windings. the volume occupied by the second coil reduces the efficiency of the main coil and results in higher coil power consumption. this method cannot be applied efficiently to products not specifically designed for this purpose. the resistor (parallel with the coil) for efficient action, the resistor must be of the same order of magnitude as the coil resistance. a resistor 1.5 times the coil resistance will limit the surge to 1.5 times the supply voltage. release time and opening speed are moderately affected. the major problem is the extra power dissipated. semi-conductor devices the diode it is the most simple method to totally suppress the surge voltage. it has the major disadvantage of the higher reduction of contact opening speed. this is due to the total recycling, through the diode, of the energy contained in the coil itself. the following measurement is performed once again on the same relay. operation times are given by the upper curve: - time to start the movement 14ms - transfer time 5ms these times are multiplied by a coefficient from 4 to 8. the lower curve shows the coil current. the increase prior to no contact opening indicates that the contact spring dissipates its energy. at the opening time the current becomes constant as a result of practically zero opening speed. due to this kind of behavior, this type of suppression must be avoided for power relays. for small relays which have to switch low currents of less than 0.2 a, degradation of life is not that significant and the method may be acceptable. date of issue: 6/00 - 10 - page 3 of 4
the diode + resistor network it eliminates the inconvenience of the resistor alone, explained above, and it limits the action of a single diode. it is now preferred to used the diode + zener network. the diode + zener network like the resistor, the zener allows a faster decurrent decay. in addition it introduces a threshold level for current conduction which avoids the recycling of energy released during contact movement. the lower curve on the opposite record demonstrates those characteristics. voltage limitation occurs at 42v. the two voltages spikes generated by internal movement are at lower levels than zener conduction. as a result, no current is recycled in the coil. the opening time phases are as follows: - time to start the movement 2.6ms - total motion time 2.4ms - transfer time 1.4ms the release time is slightly increased. the contacts' opening speed remains unchanged. date of issue: 6/00 - 11 - page 4 of 4
application notes n023 mounting distance between relays applicable to m2xx / m3xx / m4xx / m5xx definition and applicability this application note defines the minimum distance between relays to maintain the whole performances of the relays as given in our data sheets. phenomenon analysis each relay generates a magnetic field either when relay is de-energised because of the permanent magnet or in the energised position because of permanent magnet and coil. the magnetic field generated by one relay could affect the performance of another relay when the below minimum distance between relay is not respected. if the relays are mounted adjacent to each other, it is advisable to alternate direction of magnetic path on every other unit and to keep a 1.6 mm space between relays, figure ?a?. or when mounted in the same direction, separate each relay from the other by 3.2 mm, figure ?b?. if two or more rows of relays are installed, allow clearance of 3.2 mm between rows, figures ?c? and ?d?. provide 4.8 mm space between relays if used in opposition, figure ?e?. distance in millimetre. date of issue: 9/07 - 25 - page 1 of 1
engineering data sheet s320 relay socket 25 amp basic socket series designation for: series m320 general characteristics crimp tool m 22520/1-01 with turret m 22520/1-02 or ms 3191-1 insertion and extraction tool nas 1664-12 / 1664-16. weight 25g max. temperature range -70 c to +125 c. this connection is designed to the standards and requirements of mil-s-12883 contacts and hardware to be delivered disassembled in a plastic bag. tolerances, unless otherwise, specified 0.25mm. featuring leach ? power and control solutions www.esterline.com americas 6900 orangethorpe ave. p.o. box 5032 buena park, ca 90622 . . tel: (01) 714-736-7599 fax: (01) 714-670-1145 europe 2 rue goethe 57430 sarralbe france . . tel: (33) 3 87 97 31 01 fax: (33) 3 87 97 96 86 asia units 602-603 6/f lakeside 1 no.8 science park west avenue phase two, hong kong science park pak shek kok, tai po, n.t. hong kong tel: (852) 2 191 3830 fax: (852) 2 389 5803 data sheets are for initial product selection and comparison. contact esterline power systems prior to choosing a component. date of issue: 3/06 - 21 - page 1 of 3
terminal layout s320 mounting hardware d a t e o f i s s u e : 3 / 0 6 - 2 2 - p a g e 2 o f 3 3 5 . 7 2 8 . 2 5 . 0 8 5 . 9 1 1 . 0 1 6 . 0 1 4 . 1 0 . 3 0 . 3 0 . 1 c o d e b s 3 2 0 m o u n t i n g h o l e l a y o u t f o r h o l e c l e a r a n c e , s e e h a r d w a r e c o d e 3 2 x 2 x 1 1 f i x e d u n c s t u d s p e r m i l - s - 1 2 8 8 3 / 4 1 - e d i t c b o t t o m m o u n t t o p m o u n t m o u n t i n g t o r q u e : n u t 4 / 4 0 : 0 , 4 5 0 , 1 n m - n u t 1 0 - 3 2 : 1 , 2 m a x m o u n t i n g h o l e : 5 , 3 m m m o u n t i n g h o l e : 3 , 6 m m m a x 2 . 4 m a x 3 . 2 c o d e 8 : 0 5 - 2 8 4 - 2 0 l o o s e u n c s t u d s m i l - s - 1 2 8 8 3 / 4 1 - e d i t c b o t t o m m o u n t t o p m o u n t m o u n t i o n g t o r q u e : n u t 4 / 4 0 : 0 , 4 5 0 , 1 n m - n u t 1 0 - 3 2 : 1 , 2 m a x m o u n t i n g h o l e : 5 , 3 m m m o u n t i n g h o l e : 3 , 6 m m 2 . 4 3 . 2 c o d e 6 : 0 5 - 2 8 4 - 1 3 u n c h a r d w a r e b o t t o m m o u n t t o p m o u n t m o u n t i n g t o r q u e : 0 , 4 5 0 , 1 n m m o u n t i n g h o l e : 3 , 6 m m m o u n t i n g h o l e : 3 , 6 m m 1 . 2 1 . 2 c o d e 7 : 0 5 - 2 8 4 - 1 5 m e t r i c h a r d w a r e t o p m o u n t m o u n t i n g t o r q u e : 0 , 4 5 0 , 1 n m f o r r e l a y s w i t h c o d e b t e r m i n a l s 1 . 2 m o u n t i n g h o l e : 3 , 6 m m c o d e 3 : 0 5 - 2 8 4 - 0 7 l o o s e m e t r i c h a r d w a r e t o p m o u n t m o u n t i n g t o r q u e : 0 , 4 5 0 , 1 n m : 3 , 6 m m m a x 4 . 0 c o d e 2 : 0 5 - 2 8 4 - 0 0 l o o s e m e t r i c h a r d w a r e t o p m o u n t m o u n t i n g t o r q u e : 0 , 4 5 0 , 1 n m : 3 , 6 m m 4 . 0 c o d e 1 : 0 5 - 2 8 4 - 1 2 l o o s e u n c h a r d w a r e b o t t o m m o u n t m o u n t i n g t o r q u e n u t 4 / 4 0 : 0 , 4 5 0 , 1 n m n u t 1 0 - 3 2 : 1 , 2 m a x : 3 , 6 m m m a x 2 . 4 c o d e 9 : 0 5 - 2 8 4 - 2 1
grommet to seal on wire insulation dia s320 code a diam from 2.8 ......3.4mm contact size and style code 8 crimp end to 05 910 00 accomodate awg12-14 contact mating end #12 code 10 crimp end to 05 910 01 accomodate awg16 contact mating end #12 coil contacts x1-x2 crimp end to 05 911 00 accomodate awg16-18-20 contact mating end #16 coil contacts x1-x2 crimp end to 05 910 01 accomodate awg16-18-20 contact mating end #16 code 0 without contacts code 11 mil-c-39029/92-535 30 976 00 bin code color bands or bin code numbering on crimpside crimp end to accomodate awg 12 contact mating end #12 code 13 mil-c-39029/92-536 31 099 00 bin code color bands or bin code numbering on crimpside crimp end to accomodate awg 16 contact mating end #12 coil contacts mil-c-39029/92-533 x1-x2 bin code color bands 30 315 00 or bin code numbering on crimpside crimp end to accomodate awg16-18-20 contact mating end #16 coil contacts mil-c-39029/92-533 x1-x2 bin code color bands 30 315 00 or bin code numbering on crimpside crimp end to accomodate awg16-18-20 contact mating end #16 socket numbering system s320 a 1 a 8 1-basic socket designation________________________| | | | | 2-terminal layout_____________________________________| | | | 3-mounting hardware_______________________________________| | | 4-grommet to seal on wire insulation__________________________| | 5-contact size and style___________________________________________| date of issue: 3/06 - 23 - page 3 of 3

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