oH VE S CO AV R M AI SIO PL LA N IA BL S NT E Features ■ *R ■ ■ ■ ■ ■ Two channel quadrature output Bushing or servo mount Square wave signal Index channel available Small size Resolution to 256 PPR ■ ■ ■ CMOS and TTL compatible Long life High operating speed EN - Rotary Optical Encoder Electrical Characteristics Output ..............................................................................................2-bit gray 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 *Consult factory for other voltages up to 5 VDC. 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 flux 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) STANDARD RESOLUTIONS AVAILABLE 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 For Non-Standard Resolutions—Consult Factory 1 cycle 360 ° ± 90 ° (Full quadrature output cycles per shaft revolution) 25* 125 50* 128 64 200 100 256 Clockwise rotation *RoHS Directive 2002/95/EC Jan 27 2003 including Annex Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. * Channel B leads Channel A 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. Bourns encoder output signals are square wave digital pulses which do not require debounce circuitry. Both features make it possible to significantly reduce the memory overhead, wiring and wiring interconnects 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. The EN series encoder converts rotary input into electrical signals which can be used by microprocessors without A/D conversion. EN - Rotary Optical Encoder Dimensional Drawings Optional Radial Leads 2.54 TYP. (.100) .635 SQ. (.025) 9.525 (.375) 8.636 (.34 ) 18.5 (.73) 15.88 (.625) 6.35 (.250) 2.36 (.093) 21.21 (.835) 1/4-32 UNEF 3.167 + .000/ – .0076 DIA. (.1247 + .000/ – .0003) 9.53 (.375) 1.37 (.054) 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 Bushing Style C 7.14 + .000/ – .0508 DIA. (.281 + .000/ – .002) 10.32 + .000/ – .0508 DIA. (.4062 + .000/ – .002) 9.53 (.375) 6.342 + .000/ – .0076 DIA. (.2497 + .000/ – .0003) 3/8-32 UNEF 9.53 (.375) 9.53 (.375) 1.57 3/8-32 UNEF (.062) 6.342 + .000/ – .0076 DIA. (.2497 + .000/ – .0003) 1/4-32 UNEF 1.57 (.062) 3.167 + .000/ – .0076 DIA. (.1247 + .000/ – .003) Bushing Style S (Ball Bearing) Bushing Style A GROUND 1.57 (.062) 21.8 (.86) Vcc .787 ± .254 (.031 ± .010) 1.57 (.062) 1.57 (.062) A + SHAFT LENGTH SHAFT FLAT LENGTH (DIM. F) 12.7 (.050) 2.54 (.100) 15.9 (.625) 5.08 (.200) 19.1 (.750) 8.25 (.325) Shaft End Style C 2.54 4 PLCS. (.100) 4.14 (.163) 11.13 (.438) 3.167 + .000/ – .0076 DIA. (.1247 + .000/ – .003) CHANNEL B 18.11 (.713) Optional Radial Leads - 6.34 (.2497) 5.54 (.218) F Anti-rotation Lug View Bushing Style T (Ball Bearing) TERMINATION DIAGRAM INDEX OR CHANNEL A N.C. .254 ± .076 R. (.010 .003) 9 PLCS. B 19.05 ± .0127 DIA. (.7500 ± .0005) 22.2 + .0127 / – .1270 DIA. (.875 + .0005 / – .0050) 0.99 DIA. MIN. (.039) 6.99 2 PLCS. (.275) Recommended Board Layout with Bracket Servo Mount Style W (Ball Bearing) Ribbon Cable Option Detail Side Exit Bushing with Bracket Connector Pinout — A +B Ribbon Cable Option Rear Exit Ribbon Cable Option Side Exit Connector Pinout 5 4 3 2 1 5 4 3 2 1 DIMENSIONS: MM (IN.) Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. EN - Rotary Optical Encoder How To Order BOURNS EN SERIES OPTICAL ENCODER E N C 1 J - B 2 8 - L 0 0 1 2 8 L ANTI-ROTATION LUG POSITION Code Description None D J 9:00 Position P Rear Mounting Bracket SHAFT LENGTH* Code Description 1/2 " Long 16 5/8 " Long 20 7/8 " Long 28 TERMINAL*** CONFIGURATION Code Description L Axial, MultiPurpose Pin Radial, MultiR Purpose Pin Axial, Ribbon M & Connector 10 “ Radial, Ribbon N & Connector 10 ” Axial, Ribbon W 10 “ No Connector Radial, Ribbon Y 10 ” No Connector SWITCHING CONFIGURATION Code Description Channel A Leads Channel B 1 By 90 ° (Clockwise Rotation)** Code 1 Switching 2 With Index Channel TERMINALS Code Description L RoHS Compliant Blank Standard RESOLUTION Cycles Per Code Revolution 25 00025 50 00050 64 00064 100 00100 125 00125 128 00128 200 00200 256 00256 SHAFT STYLE Code B D C Description 1/4 " Dia., Plain End 1/8 " Dia., Plain End 1/4 " Dia., Single Flatted Use With Bushings (Code) A, S C, T, W A, S BUSHING CONFIGURATION Code Description A 3/8 "D X 3/8 "L Threaded C 1/4 "D X 1/4 "L Threaded S 3/8 "D X 3/8 "L Threaded (Ball Bearing) 1/4 "D X 3/8 "L Threaded T (Ball Bearing) Servo Mount 7/8 "D W (Ball Bearing) * Shaft length measured from mounting surface. ** 25 and 50 ppr is reversed (Channel B leads Channel A) *** Standard ribbon cable is 10 " long Consult factory for other lengths. REV. 06/23/06 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.