features two channel quadrature output bushing or servo mount square wave signal index channel available small size resolution to 256 ppr en - rotary optical encoder *rohs directive 2002/95/ec jan 27, 2003 including annex. speci cations are subject to change without notice. customers should verify actual device performance in their speci c applications. electrical characteristics output .................................................................................2-bit quadrature code, channel a leads channel b by 90 o (electrical) with clockwise rotation resolution .................................................................................................................... ......................................................... 25 to 256 cycles per revolution insulation resistance (500 vdc) ............................................................................................... ....................................................................1,000 megohms electrical travel.............................................................................................................. ....................................................................................... continuous supply voltage ................................................................................................................ ........................................................................ 5.0 vdc 0.25 vdc supply current ................................................................................................................ .............................................................................26 ma maximum output voltage low output ................................................................................................................... ..............................................................................0.8 v maximum high output .................................................................................................................. ..................................................................................4 v minimum output current low output ................................................................................................................... .............................................................................25 ma minimum rise/fall time ................................................................................................................ ..................................................................................200 ns (typical) shaft rpm (ball bearing) ...................................................................................................... ..................................................................3,000 rpm maximum power consumption ............................................................................................................................... ...................................................136 mw maximum pulse width (electrical degrees, each channel) ................................................................................ ...........................................................180 o 45 o typ. pulse width (index channel) ................................................................................................... ..............................................................................360 o 90 o phase (electrical degrees, channel a to channel b) ............................................................................ ..........................................................90 o 45 o typ. index channel centered on 1-1 state combination of a and b channels ........................................................... ....................................................0 o 45 o environmental characteristics operating temperature range ................................................................................................... ................................... -40 oc to +75 oc (-40 f to +167 f) storage temperature range ..................................................................................................... .................................... -40 c to +85 c (-40 f to +185 f) humidity ...................................................................................................................... ......................................... mil-std-202, method 103b, condition b vibration ..................................................................................................................... ....................................................................................................... 5 g shock ......................................................................................................................... ..................................................................................................... 50 g rotational life a & c bushings (300 rpm maximum)** ........................................................................................... ................................................ 10,000,000 revolutions w, s & t bushings (3,000 rpm maximum)** ...................................................................................... ........................................... 200,000,000 revolutions ip rating ..................................................................................................................... .....................................................................................................ip 40 mechanical characteristics mechanical angle .............................................................................................................. ..........................................................................360 continuous torque (starting and running) a & c bushings (spring loaded for optimum feel) .............................................................................. ............................... 1 n-cm (1.5 oz-in.) maximum w, s & t bushings (ball bearing shaft support) ............................................................................... .............................. 0.07 n-cm (0.1 oz-in.) maximum mounting torque ............................................................................................................... ..................................1.7 to 2.0 n-cm (15 to 18 lb.-in.) maximum shaft end play ................................................................................................................ .................................................. 0.30 mm (0.012 ?) t.i.r. maximum shaft radial play ............................................................................................................. ................................................. 0.12 mm (0.005 ?) t.i.r. maximum weight ........................................................................................................................ .................................................................................. 11 gms. (0.4 oz.) terminals ..................................................................................................................... ................................................ axial or radial pc pins or ribbon cable soldering condition manual soldering .................................................................................................................. 96.5sn/3.0ag/ 0.5cu solid wire or no-clean rosin cored wire 370 c (700 f) max. for 3 seconds wave soldering................................................................................................................ ...........................96.5sn/3.0ag/0.5cu solder with no-clean ? ux 260 c (500 f) max. for 5 seconds wash processes ............................................................................................................... .....................................................................not recommended marking ............................................................................................................................... .manufacturer?s trademark, name, part number, and date code. hardware ............................................................... one lockwasher and one mounting nut supplied with each encoder, except on servo mount versions. **for resolutions 128 quadrature cycles per shaft revolution. quadrature output table output voltage channel a channel b index channel (optional) 4.0 v (min) 0.8 v (max) 4.0 v (min) 0.8 v (max) 4.0 v (min) 0.8 v (max) 1 0 1 0 1 0 1 cycle clockwise rotation 360 90 standard resolutions available (full quadrature output cycles per shaft revolution) 25* 125 50* 128 64 200 100 256 for non-standard resolutions?consult factory * channel b leads channel a *rohs compliant versions available
speci cations are subject to change without notice. customers should verify actual device performance in their speci c applications. en - rotary optical encoder dimensional drawings optional radial leads a -+ b ground index or n.c. vcc channel b channel a termination diagram 2.54 (.100) typ. sq. 1/4-32 unef dia. 3/8-32 unef 3/8-32 unef 1/4-32 unef optional radial leads bushing style c bushing style s (ball bearing) bushing style a shaft end style c bushing style t (ball bearing) servo mount style w (ball bearing) 9.525 (.375) .635 (.025) 18.5 (.73) 6.35 (.250) 6.34 (.2497) 5.54 (.218) f 3.167 + .000/ ?.0076 (.1247 + .000/ ?.0003) 8.636 (.34 ) 4 plcs. 2 plcs. recommended board layout with bracket bushing with bracket radial leads axial ribbon cable option radial ribbon cable option ribbon cable option detail connector pinout connector pinout 18.11 (.713) 11.13 (.438) 4.14 (.163) 2.54 (.100) 6.99 (.275) 9 plcs. dia. min. 0.99 (.039) 15.88 (.625) 1.37 (.054) 21.21 (.835) 2.36 (.093) 9.53 (.375) 6.342 + .000/ ?.0076 (.2497 + .000/ ?.0003) 10.32 + .000/ ?.0508 (.4062 + .000/ ?.002) 9.53 (.375) 9.53 (.375) dia. 6.342 + .000/ ?.0076 (.2497 + .000/ ?.0003) dia. 1.57 (.062) dia. 3.167 + .000/ ?.0076 (.1247 + .000/ ?.003) 1.57 (.062) 9.53 (.375) dia. 7.14 + .000/ ?.0508 (.281 + .000/ ?.002) dia. 1.57 (.062) 1.57 (.062) dia. 3.167 + .000/ ?.0076 (.1247 + .000/ ?.003) 21.8 (.86) dia. 19.05 .0127 (.7500 .0005) dia. 22.2 + .0127 / ?.1270 (.875 + .0005 / ?.0050) 1.57 (.062) .787 .254 (.031 .010) .254 .076 (.010 .003) r. anti-rotation lug view shaft length shaft flat length (dim. f) 12.7 (.050) 15.9 (.625) 19.1 (.750) 2.54 (.100) 5.08 (.200) 8.25 (.325) 22.2 (.875) 9.65 (.380) a ?+b 5 4 3 2 1 5 4 3 2 1 dimensions: mm (inches) consult factory for options not shown, including: wire lead or cable options connectors non-standard resolutions special shaft/bushing sizes and features special performance characteristics pcb mounting bracket additional features cmos and ttl compatible long life ball bearing option for high operating speed up to 3000 rpm
bourns en series optical encoder enc1j-d28-l00128l anti-rotation lug position code d j p description none 9:00 position rear mount- ing bracket shaft length* code 16 20 24 28 description 1/2 " long 5/8 " long 3/4 " long 7/8 " long rohs identifier code l blank description compliant non-compliant switching configuration code 1 2 description channel a leads channel b by 90 (clockwise rotation)** code 1 switching with index channel*** terminal**** configuration code l r m n w y description axial, multi- purpose pin radial, multi- purpose pin axial, ribbon & connector 10 ? radial, ribbon & connector 10 ? axial, ribbon 10 ? - no connector radial, ribbon 10 ? - no connector resolution code 00025 00050 00064 00100 00125 00128 00200 00256 cycles per revolution 25 50 64 100 125 128 200 256 shaft style code b d c use with bushings (code) a, s c, t, w a, s description 1/4 " dia., plain end 1/8 " dia., plain end 1/4 " dia., single flatted bushing configuration code a c s t w description 3/8 "d x 3/8 "l threaded 1/4 "d x 1/4 "l threaded 3/8 "d x 3/8 "l threaded (ball bearing) 1/4 "d x 3/8 "l threaded (ball bearing) servo mount 7/8 "d (ball bearing) * shaft length measured from mounting surface. ** 25 and 50 ppr is reversed (channel b leads channel a). *** only available with 50, 64, 100 and 128 ppr. *** standard ribbon cable is 10 " long. consult factory for other lengths. speci cations are subject to change without notice. customers should verify actual device performance in their speci c applications. en - rotary optical encoder how to order rev. 02/11 general information the bourns ? en model is a self-contained rotary optical encoder. it produces a 2-bit quadrature signal which is suitable for digital systems where both magnitude and direction of adjustment must be provided. the en encoder is ideal for use as a digital panel control or as a position sensing device in applications where long life, reliability, high resolution and precise linearity are critical. the en series encoder converts rotary input into electrical signals which can be used by microprocessors without a/d conversion. bourns encoder output signals are square wave digital pulses which do not require debounce circuitry. both features make it possible to signi? cantly reduce the memory overhead, wiring and wiring inter- connects required by other types of control devices. en optical encoders offer a useful rotational life of from 10 million to 200 million shaft revolutions, making them ideal for extended service applications. the bourns encoder is also compact and well suited for situations where the available space is limited.
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