1 csm_a7cn_A7CN-L_ds_e_2_1 thumbwheel switch a7cn/A7CN-L a brand new lineup of a7c series compact thumbwheel switches ? the series includes a complete range of locking-type models that prevent accidental operation. ordering information switches (single switch units) note: 1. the classification diagrams show 4 switch un its combined with end caps to create 4-digit displays. 2. the model numbers given above are for switch units. 3. models with +, - displays can also be produced. add ?-pm? after the ?206? in the model number (e.g., a7cn-206-pm or a7cn-206- pm-1). accessories (order separately) use accessories, such as end caps and spacers, with the switch units. note: the @ in the spacer model number stands for a letter in the range a to u. (refer to the table in the following explanation about spa cers.) * the minimum order is for 10 end caps. model a7cn classification (see note 1.) screw mounting (back mounting) snap-in (front mounting) output code number terminals pcb terminals color light gray black light gray black 06 (binary coded decimal) --- a7cn-106-1 a7cn-206 a7cn-206-1 model A7CN-L classification (see note 1.) snap-in (front mounting) locking type output code number terminals pcb terminals color light gray black 06 (binary coded decimal) A7CN-L206 A7CN-L206-1 classification screw mounting (back mounting) snap-in (front mounting) accessory color black light gray black end caps (1 pair) a7cn-1m-1 * a7cn-2m * a7cn-2m-1 * spacer a7cn-1p @ -1 (see note.) a7cn-2p @ (see note.) a7cn-2p @ -1 (see note.)
2 a7cn/A7CN-L end caps end caps are used on the switch units at each end and allow all t he switch units to be securely mounted to a panel. they come i n pairs, one for the left and one for the right. spacers ? spacers are used for creating ex tra space or gaps between the switch units and have the same dimensions as the switch units the mselves. ? there are also spacers with engr aved characters or symbols that can be used for indicating units, such as time and length. (ref er to the following table.) consult your omron representative for details. specifications symbol a b c d e f g stamp no desig- nation sec min h g kg mm symbol h j k l q t u stamp cm m cpcs x10 sec 0 switching capacity (resistive load) 5 to 28 vdc 1 ma to 0.1 a continuous carry current 1a contact resistance 200 m ? max. insulation resistance between non-connected terminals 10 m ? min. (at 250 vdc) between terminal and non-current carrying part 100 m ? min. (at 500 vdc) dielectric strength between non-connected terminals 200 vac, 50/60 hz for 1 min between terminal and non-current carrying part 1,000 vac, 50/60 hz for 1 min vibration resistance 10 to 55 hz, 1.5-mm double amplitude shock resistance 490m/s 2 min. durability mechanical 30,000 operations min. electrical 20,000 operations min. ambient temperature operating: -10 c to 65 c (with no icing) storage: -20 c to 80 c ambient humidity operating: 35% to 85% max. operating force 4.41 n max.
3 a7cn/A7CN-L dimensions (unit: mm) switches 8 4 1 c 2.4 0.3 p=6 0.2 * 5.4 3 a * terminal position dimensions 18 16 2.8 6 0.1 a c b 0.6 0.2 pcb terminal p=2.54 0.2 16 11.6 2 4.6 2 15.7 3.5 a +0.7 0 b 16.2 +0.5 0 2 panel thickness: 2 tow, m2.5 or m2.6 note: 1. the dimensions above include both end caps, and will increase 6 mm for each spacer inserted. 2. unless otherwise specified, a tolerance of 0.4 mm applies to all dimensions. the tolerance for multiple connection is (number of units x 0.4) mm. number of switches (n) size a (n x 6 + 6) size b (n x 6 + 11) size c (n x 6 + 16) 1 121722 2 182328 3 242934 4 303540 5 364146 6 424752 7 485358 8 545964 9 606570 10 66 71 76 a7cn-106-1 pcb terminals note: common terminal c is at the bottom when the switch unit is viewed from the front. panel cutout 8 4 1 c 5.4 * b +0.7 0 16.2 +0.6 0 2.4 0.3 p=6 3 b 18 6 0.1 4 a 0.6 0.1 p=2.54 0.2 16 11.6 2 4.9 2.2 15.5 3.5 2 pcb terminal panel thickness: 1 to 2 * terminal position dimensions 0.2 note: 1. the dimensions above include both end caps, and will increase 6 mm for each spacer inserted. 2. unless otherwise specified, a tolerance of 0.4 mm applies to all dimensions. the tolerance for multiple connection is (number of units x 0.4) mm. number of switches (n) size a (n x 6 + 8) size b (n x 6 + 6) 11412 22018 32624 43230 53836 64442 75048 85654 96260 10 68 66 a7cn-206(-1) pcb terminals note: common terminal c is at the bottom when the switch unit is viewed from the front. panel cutout 8 4 1 c b +0.7 0 16.2 +0.6 0 2.4 0.3 p=6 0.2 5.4 3 b 18 6 0.1 4 a 0.6 0.2 p=2.54 0.2 16 11.6 1.9 2.2 15.5 4.7 3.5 2 pcb terminal panel thickness: 1 to 2 when setting * terminal position dimensions * note: 1. the dimensions above include both end caps, and will increase 6 mm for each spacer inserted. 2. unless otherwise specified, a tolerance of 0.4 mm applies to all dimensions. the tolerance for multiple connection is (number of units x 0.4) mm. number of switches (n) size a (n x 6 + 8) size b (n x 6 + 6) 11412 22018 32624 43230 53836 64442 75048 85654 96260 10 68 66 A7CN-L206(-1) pcb terminals locking model note: common terminal c is at the bottom when the switch unit is viewed from the front. panel cutout
4 a7cn/A7CN-L accessories (order separately) note: unless otherwise indicated, dimensional tole rances for dimensions in the models above are 0.4mm. output codes 06 (binary code) note: the solid dot indicates that the internal switch is on (i.e., connected to the common terminal). ordering procedure place orders as shown in the ex ample below, specifying the model and number. standard products are not factory-assembled for shipment. contact your omron representative for details on ordering factory-assembled sets. 1. switch unit (snap-in mounting, black) a7cn-206-1: 4 pieces 2. spacer (snap-in mounti ng, no designation, black) a7cn-2pa-1: 1 piece 3. end caps (snap-in mounting, black) a7cn-2m-1: 1 pair end caps for push-operated switches a7cn-1m-1 screw mounting left side right side 16 0.2 3 0.1 16 3 2 2 13.6 15.7 2 13.6 15.7 18 16 0.2 16 18 8 3 0.1 3 2.2 2 8 44 16 3 0.1 2.7 2 44 3 0.1 2.7 2.2 2.2 15.5 18 16 18 13.4 15.5 13.4 end caps for push-operated switches a7cn-2m(-1) snap-in mounting left side right side 9 6 0.1 18 11.65 2 2 16 spacers for push-operated switches a7cn-1p @ -1 screw panel mounting model note: the @ in the spacer model number stands for a letter in the range a to u. (refer to the table under the explanation about spacers on page 3.) spacers for push-operated switches a7cn-2p @ (-1) snap-in mounting model note: the @ in the spacer model number stands for a letter in the range a to u. (refer to the table under the explanation about spacers on page 3.) 9 6 0.1 18 13.4 2.25 16 0.2 dial terminals connected to common 1 2 4 8 0 1 2 3 4 5 6 7 8 9 3 2 3 1 1
5 a7cn/A7CN-L safety precautions refer to precautions for correct use on in the technical guide for thumbwheel switches . environment ? do not use where gases are generat ed (ammonia, chlorine, sulfur dioxide). ? although switches are of nearly dus t-proof construction, they are not drip-proof, therefore do not use in areas subject to water or oil exposure and do not operate with wet or oily hands. ? provide additional dust-proofing m easures, such as using a dust- proof cover, when using in sand-exposed areas. handling ? the a7cn cannot be connected to the a7c. ? the molded components of the switch use polyacetal resin and polycarbonate resin. it is recommended that alcohol is used to wipe off dirt and smudges from the molded components. take care to prevent the alcohol from getting inside. do not use thinner or other solu tions which might damage the resin. ? when changing settings, do not touch t he operating buttons if your fingers are wet or there is oil or any other foreign substance on your fingers. ? do not drop the individual switches. doing so may damage the resin catch (for connecting) on the side of the switch. ? when separating switches, use a screwdriver as shown in the figure below; disconnect them by releasing the top and bottom hooks. be careful not to bend the hooks. ? when connecting switches, fit the mating parts together. ? do not push the (+) and (-) operating push-buttons at the same time. models with pcb terminals do not use excessive force in handl ing the switches. in particular, take care to avoid dropping them because the terminals might bend or break. screw-mounting models tighten mounting screws to a torque between 0.2 to 0.24 nm, using m2.6 screws. use plain washers or spring washers together with the screws. setting numbers locking type ? set with the setting button by raising it. ? return the button to its original position after setting. it is then locked to prevent rotation, and the set numbers will not change accidentally. soldering note the following points when soldering printed circuit boards: ? the terminal insertion holes on the pcb must be at least 1 mm in diameter. ? automatic soldering do not use dip cleaning. doing so ma y result in flux penetration of the switch interior, causing c ontact and rotational defects. clean the flux as shown in figur e 1, tilting the switch 80 or less and using a brush to apply the solvent only to the back of the board. it may also be cleaned by dipping only the back of the board into the solvent and then using a brush to clean. ? dip soldering when applying flux solvent, the di pping time is a maximum of 2 seconds. as shown in figure 2, avoid flooding the top surface of the printed circuit board with flux. us ing a brush to apply flux further reduces the danger of flux penetration. when cleaning flux with a brush, tilt the switch 80 or less, as shown in figure 1, in order to prevent flux from flowing onto the switch mounting surface. clean flux as described above under automatic soldering. ? using a soldering iron use a 30-w soldering iron at a temperature of 350 c for a maximum of 3 seconds, and flush as described above. do not apply force to the terminals during soldering and for 3 minutes after soldering is completed. doing so may result in conduction or operation failure. ? ensure that soldering flux and alcohol do not penetrate into the switch interior precautions for correct use do not push here top surface of board 80 or less back surface of board wipe away flux with a brush. figure 1 figure 2
r e a d a n d u n d e r s t a n d t h i s c a t a l o g p l e a s e r e a d a n d u n d e r s t a n d t h i s c a t a l o g b e f o r e p u r c h a s i n g t h e p r o d u c t s . p l e a s e c o n s u l t y o u r o m r o n r e p r e s e n t a t i v e i f y o u h a v e a n y q u e s t i o n s o r c o m m e n t s . w a r r a n t y a n d l i m i t a t i o n s o f l i a b i l i t y w a r r a n t y o m r o n ' s e x c l u s i v e w a r r a n t y i s t h a t t h e p r o d u c t s a r e f r e e f r o m d e f e c t s i n m a t e r i a l s a n d w o r k m a n s h i p f o r a p e r i o d o f o n e y e a r ( o r o t h e r p e r i o d i f s p e c i f i e d ) f r o m d a t e o f s a l e b y o m r o n . o m r o n m a k e s n o w a r r a n t y o r r e p r e s e n t a t i o n , e x p r e s s o r i m p l i e d , r e g a r d i n g n o n - i n f r i n g e m e n t , m e r c h a n t a b i l i t y , o r f i t n e s s f o r p a r t i c u l a r p u r p o s e o f t h e p r o d u c t s . a n y b u y e r o r u s e r a c k n o w l e d g e s t h a t t h e b u y e r o r u s e r a l o n e h a s d e t e r m i n e d t h a t t h e p r o d u c t s w i l l s u i t a b l y m e e t t h e r e q u i r e m e n t s o f t h e i r i n t e n d e d u s e . o m r o n d i s c l a i m s a l l o t h e r w a r r a n t i e s , e x p r e s s o r i m p l i e d . l i m i t a t i o n s o f l i a b i l i t y o m r o n s h a l l n o t b e r e s p o n s i b l e f o r s p e c i a l , i n d i r e c t , o r c o n s e q u e n t i a l d a m a g e s , l o s s o f p r o f i t s o r c o m m e r c i a l l o s s i n a n y w a y c o n n e c t e d w i t h t h e p r o d u c t s , w h e t h e r s u c h c l a i m i s b a s e d o n c o n t r a c t , w a r r a n t y , n e g l i g e n c e , o r s t r i c t l i a b i l i t y . i n n o e v e n t s h a l l t h e r e s p o n s i b i l i t y o f o m r o n f o r a n y a c t e x c e e d t h e i n d i v i d u a l p r i c e o f t h e p r o d u c t o n w h i c h l i a b i l i t y i s a s s e r t e d . i n n o e v e n t s h a l l o m r o n b e r e s p o n s i b l e f o r w a r r a n t y , r e p a i r , o r o t h e r c l a i m s r e g a r d i n g t h e p r o d u c t s u n l e s s o m r o n ' s a n a l y s i s c o n f i r m s t h a t t h e p r o d u c t s w e r e p r o p e r l y h a n d l e d , s t o r e d , i n s t a l l e d , a n d m a i n t a i n e d a n d n o t s u b j e c t t o c o n t a m i n a t i o n , a b u s e , m i s u s e , o r i n a p p r o p r i a t e m o d i f i c a t i o n o r r e p a i r . a p p l i c a t i o n c o n s i d e r a t i o n s s u i t a b i l i t y f o r u s e o m r o n s h a l l n o t b e r e s p o n s i b l e f o r c o n f o r m i t y w i t h a n y s t a n d a r d s , c o d e s , o r r e g u l a t i o n s t h a t a p p l y t o t h e c o m b i n a t i o n o f p r o d u c t s i n t h e c u s t o m e r ' s a p p l i c a t i o n o r u s e o f t h e p r o d u c t s . a t t h e c u s t o m e r ' s r e q u e s t , o m r o n w i l l p r o v i d e a p p l i c a b l e t h i r d p a r t y c e r t i f i c a t i o n d o c u m e n t s i d e n t i f y i n g r a t i n g s a n d l i m i t a t i o n s o f u s e t h a t a p p l y t o t h e p r o d u c t s . t h i s i n f o r m a t i o n b y i t s e l f i s n o t s u f f i c i e n t f o r a c o m p l e t e d e t e r m i n a t i o n o f t h e s u i t a b i l i t y o f t h e p r o d u c t s i n c o m b i n a t i o n w i t h t h e e n d p r o d u c t , machin e , s y s t e m , o r o t h e r a p p l i c a t i o n o r u s e . t h e f o l l o w i n g a r e s o m e e x a m p l e s o f a p p l i c a t i o n s f o r w h i c h p a r t i c u l a r a t t e n t i o n m u s t b e g i v e n . t h i s i s n o t i n t e n d e d t o b e a n e x h a u s t i v e l i s t o f a l l p o s s i b l e u s e s o f t h e p r o d u c t s , n o r i s i t i n t e n d e d t o i m p l y t h a t t h e u s e s l i s t e d m a y b e s u i t a b l e f o r t h e p r o d u c t s : o u t d o o r u s e , u s e s i n v o l v i n g p o t e n t i a l c h e m i c a l c o n t a m i n a t i o n o r e l e c t r i c a l i n t e r f e r e n c e , o r c o n d i t i o n s o r u s e s n o t d e s c r i b e d i n t h i s c a t a l o g . n u c l e a r e n e r g y c o n t r o l s y s t e m s , c o m b u s t i o n s y s t e m s , r a i l r o a d s y s t e m s , a v i a t i o n s y s t e m s , m e d i c a l e q u i p m e n t , a m u s e m e n t m a c h i n e s , v e h i c l e s , s a f e t y e q u i p m e n t , a n d i n s t a l l a t i o n s s u b j e c t t o s e p a r a t e i n d u s t r y o r g o v e r n m e n t r e g u l a t i o n s . s y s t e m s , m a c h i n e s , a n d e q u i p m e n t t h a t c o u l d p r e s e n t a r i s k t o l i f e o r p r o p e r t y . p l e a s e k n o w a n d o b s e r v e a l l p r o h i b i t i o n s o f u s e a p p l i c a b l e t o t h e p r o d u c t s . n e v e r u s e t h e p r o d u c t s f o r a n a p p l i c a t i o n i n v o l v i n g s e r i o u s r i s k t o l i f e o r p r o p e r t y w i t h o u t e n s u r i n g t h a t t h e s y s t e m a s a w h o l e h a s b e e n d e s i g n e d t o a d d r e s s t h e r i s k s , a n d t h a t t h e o m r o n p r o d u c t s a r e p r o p e r l y r a t e d a n d i n s t a l l e d f o r t h e i n t e n d e d u s e w i t h i n t h e o v e r a l l e q u i p m e n t o r s y s t e m . p r o g r a m m a b l e p r o d u c t s o m r o n s h a l l n o t b e r e s p o n s i b l e f o r t h e u s e r ' s p r o g r a m m i n g o f a p r o g r a m m a b l e p r o d u c t , o r a n y c o n s e q u e n c e t h e r e o f . d i s c l a i m e r s c h a n g e i n s p e c i f i c a t i o n s p r o d u c t s p e c i f i c a t i o n s a n d a c c e s s o r i e s m a y b e c h a n g e d a t a n y t i m e b a s e d o n i m p r o v e m e n t s a n d o t h e r r e a s o n s . i t i s o u r p r a c t i c e t o c h a n g e m o d e l n u m b e r s w h e n p u b l i s h e d r a t i n g s o r f e a t u r e s a r e c h a n g e d , o r w h e n s i g n i f i c a n t c o n s t r u c t i o n c h a n g e s a r e m a d e . h o w e v e r , s o m e s p e c i f i c a t i o n s o f t h e p r o d u c t s m a y b e c h a n g e d w i t h o u t a n y n o t i c e . w h e n i n d o u b t , s p e c i a l m o d e l n u m b e r s m a y b e a s s i g n e d t o f i x o r e s t a b l i s h k e y s p e c i f i c a t i o n s f o r y o u r a p p l i c a t i o n o n y o u r r e q u e s t . p l e a s e c o n s u l t w i t h y o u r o m r o n r e p r e s e n t a t i v e a t a n y t i m e t o c o n f i r m a c t u a l s p e c i f i c a t i o n s o f p u r c h a s e d p r o d u c t s . d i m e n s i o n s a n d w e i g h t s d i m e n s i o n s a n d w e i g h t s a r e n o m i n a l a n d a r e n o t t o b e u s e d f o r m a n u f a c t u r i n g p u r p o s e s , e v e n w h e n t o l e r a n c e s a r e s h o w n . p e r f o r m a n c e d a t a perfor m a n c e d a t a g i v e n i n t h i s c a t a l o g i s p r o v i d e d a s a g u i d e f o r t h e u s e r i n d e t e r m i n i n g s u i t a b i l i t y a n d d o e s n o t c o n s t i t u t e a w a r r a n t y . i t m a y r e p r e s e n t t h e r e s u l t o f o m r o n ? s t e s t c o n d i t i o n s , a n d t h e u s e r s m u s t c o r r e l a t e i t t o a c t u a l a p p l i c a t i o n r e q u i r e m e n t s . a c t u a l p e r f o r m a n c e i s s u b j e c t t o t h e o m r o n w a r r a n t y a n d l i m i t a t i o n s o f l i a b i l i t y . e r r o r s a n d o m i s s i o n s t h e i n f o r m a t i o n i n t h i s d o c u m e n t h a s b e e n c a r e f u l l y c h e c k e d a n d i s b e l i e v e d t o b e a c c u r a t e ; h o w e v e r , n o r e s p o n s i b i l i t y i s a s s u m e d f o r c l e r i c a l , t y p o g r a p h i c a l , o r p r o o f r e a d i n g e r r o r s , o r o m i s s i o n s . 2008 . 12 i n t h e i n t e r e s t o f p r o d u c t i m p r o v e m e n t , s p e c i f i c a t i o n s a r e s u b j e c t t o c h a n g e w i t h o u t n o t i c e . o m r o n c o r p o r a t i o n i n d u s t r i a l a u t o m a t i o n c o m p a n y h t t p : / / w w w . i a . o m r o n . c o m / ( c ) c o p y r i g h t o m r o n c o r p o r a t i o n 2 0 0 8 a l l r i g h t r e s e r v e d .
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