grayhill, inc. ? 561 hillgrove avenue ? lagrange, illinois 60525-5997 ? usa ? phone: 708-354-1040 ? fax: 708-354-2820 ? www.grayhill.com optical and mechanical encoders mechanical encoders series 20 concentric shafts feature s ? compact mechanical encoder with concentric shafts ? output code choices ? panel and shaft seal option ? manufactured to iso 9001 and military standards ? available with a fxed stop or continuous rotation ? custom confgurations available dimensions in inches specific ations electrical ratings switching loads: 150 ma, 115 vac 200 ma, 28 vdc life e xpectancy: 25,000 cycles at rated loads contact resistance: 300 mohms max. (less than 100 mohms initially) insulation resistance: 1000 mohms min. (10,000 mohms initially) dielectric strength: 500 vac min. hardware dimensions: lockwasher: .437inch diameter, .022inch thick hex nut: 5/16-32 unef-2b thread, .437 inch across fats, .094 inch thick materials and finishes t erminal pins: phosphor bronze with tin over nickel plating p anel seal: buna-n rubber, adhesive coated lockwasher: spring steel with zinc plating hex nut: brass with tin/zinc plating m echanical ratings stop strength: 5 in-lbs. rotational t orque: 5 in-oz outer shaft 3.5 in-oz inner shaft mounting t orque: 12 in-lbs. recommended operating t emperature r ange: -40c to +85c storage t emperature r ange: -55c to +100c i mmersion: 15 psi (33ft) for 30 minutes pin dimensions: .018 inch square series 20 : mechanical encoder, concentric shafts seal: s = sealed; a = not sealed output code a ngle of throw (outer shaft) stop arrangement: ac = all positions continuous rotation; af = all positions with fxed stop between frst and last; 02 to 15: number of positions, if less than maximum t ermination: p = pins; 02 to 25 = cable length stop arrangement (see above) a ngle of throw (inner shaft) output code ordering inf ormation (potential combinations) a ngle of throw / max positions: 2 = 22.5 / 16 positions 0 = 30 / 12 positions 6 = 36 / 10 positions 5 = 45 / 8 positions output code: g = gray b = binary q = quadrature 20sg2a cCg2a c-p
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