*R oH S CO M PL IA NT Features Two channel quadrature output Ball bearing option for high operating Bushing or servo mount speed up to 3000 rpm RoHS compliant* Square wave signal Small size Resolution to 256 PPR CMOS and TTL compatible Long life EN - Rotary Optical Encoder Electrical Characteristics Output ................................................................................... 2-bit quadrature code, Channel A leads Channel B by 90 (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 45 typ. Pulse Width (Index Channel) ................................................................................................................................................................................. 360 90 Phase (Electrical Degrees, Channel A to Channel B)........................................................................................................................................90 45 typ. Environmental Characteristics Operating Temperature Range .......................................................................................................................................-40 C to +75 C (-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 STANDARD RESOLUTIONS AVAILABLE Channel A (Full quadrature output cycles per shaft revolution) 25* 125 50* 128 64 200 100 256 Channel B 1 cycle 360 90 Clockwise rotation For Non-Standard Resolutions--Consult Factory * Channel B leads Channel A *RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011. Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. EN - Rotary Optical Encoder Dimensional Drawings Optional Radial Leads .635 SQ. (.025) 2.54 TYP. (.100) 9.525 (.375) 8.636 (.34 ) 18.5 (.73) 6.35 (.250) 15.88 (.625) 2.36 (.093) 21.21 (.835) 1/4-32 UNEF 3.167 + .000/ - .0076 DIA. (.1247 + .000/ - .0003) 9.53 (.375) 1.37 (.054) 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) CHANNEL A CHANNEL B 1.57 (.062) 21.8 (.86) 6.34 (.2497) 5.54 (.218) F .787 .254 (.031 .010) Anti-rotation Lug View Bushing Style T (Ball Bearing) TERMINATION DIAGRAM GROUND .254 .076 R. (.010 .003) 1/4-32 UNEF 1.57 (.062) 3.167 + .000/ - .0076 DIA. (.1247 + .000/ - .003) Bushing Style S (Ball Bearing) Bushing Style A 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 2.54 (.100) 15.9 (.625) 5.08 (.200) 19.1 (.750) 8.25 (.325) 22.2 (.875) 9.65 (.380) 2.54 4 PLCS. (.100) 4.14 (.163) 11.13 (.438) 3.167 + .000/ - .0076 DIA. (.1247 + .000/ - .003) 18.11 (.713) Optional Radial Leads A 12.7 (.050) Vcc N.C. - SHAFT FLAT LENGTH (DIM. F) Shaft End Style C 1.57 (.062) 1.57 (.062) SHAFT LENGTH + 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 Bushing with Bracket Radial Leads Connector Pinout -- A +B Axial Ribbon Cable Option 5 4 3 2 1 Radial Ribbon Cable Option DIMENSIONS: Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. Connector Pinout 5 4 3 2 1 MM (INCHES) GENERAL INFORMATION The Bourns(R) 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 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. EN - Rotary Optical Encoder How To Order BOURNS EN SERIES OPTICAL ENCODER E N C 1 J - D 2 8 - L 0 0 1 2 8 L ANTI-ROTATION LUG POSITION Code Description None D 9:00 Position J Rear MountP ing Bracket SHAFT LENGTH* Code Description 1/2 " Long 16 5/8 " Long 20 3/4 " Long 24 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)** RoHS IDENTIFIER Code Description L Compliant 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. 06/12 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Bourns: ENA1J-C28-Y00128 ENT1D-D28-W00100 ENC1J-D16-R00256 ENA2J-C28-L00128 ENT1J-D20-R00256 ENA1DB16-L00064 ENS1J-B28-L00128 ENS1J-B20-L00128 ENA1J-B28-L00128 ENC1D-D16-L00128 ENC1J-D16-R00128 ENA2J-B28-L00064 ENS2J-B28-L00064 ENS1J-B28-W00128 ENA1J-B28-W00128 ENC1J-D16-L00256 ENC1JD16-L00200 ENS1J-B28-W00100 ENS1J-B28-L00256 ENA1J-B28-L00256 ENS1J-B20-L00256 ENA1J-B16-L00064 ENW1D-D16-R00256 ENA1D-B28-L00256 ENS1D-B28-L00256 ENA1J-B28-L00050 ENA1J-B28-L00025 ENS1JB28-L00050 ENA1J-B28-L00064 ENS1J-B28-L00025 ENS1J-B28-L00064 ENS1J-B20-L00064 ENS1J-B28-Y00256 ENA2D-B28-L00064 ENT1D-D28-R00100 ENC1D-D20-R00128 ENC1J-D28-W00128 ENA1D-B20-L00025 ENS1PB28-L00128 ENA1D-B28-L00064 ENS1D-B28-L00064 ENA1D-B22-L00064 ENA1P-B28-L00128 ENA1D-B24L00064 ENC1J-D28-L00050 ENS1J-450-R00256 ENC1J-D16-L00128 ENC1J-D28-R00064 ENC1J-D24-R00064 ENC1D-D28-L00100 ENT1D-D20-L00128 ENC1D-D20-L00128 ENT1D-D28-L00100 ENC1D-D28-L00128 ENC1DD20-L00256 ENW1D-D28-L00256 ENT1D-D28-L00256 ENT1D-D20-L00256 ENS2D-B28-L00128 ENA1J-B28R00128 ENS1J-B28-R00128 ENS1J-B28-R00100 ENS1J-B20-R00025 ENT1J-D28-R00050 ENS1J-C28-R00128 ENA1J-C28-R00128 ENS2J-B28-L00128 ENS1J-C22-R00128 ENT1D-449-Y00064 ENT1D-467-Y00064 ENA1JB20-L00064L ENA1D-B20-L00064L ENA1D-B28-L00128L ENA1J-B28-L00025L ENA1J-B28-L00064L ENA1J-B28L00100L ENA1J-B28-L00128L ENA1P-B28-L00128L ENC1D-D28-L00064L ENC1J-D16-L00128L ENC1J-D20L00100L ENC1J-D28-L00064L ENC1J-D28-L00100L ENC1J-D28-L00128L ENS1D-B28-L00100L ENS1D-B28L00128L ENS1J-B16-L00100L ENS1J-B20-L00256L ENS1J-B28-L00100L ENS1J-B28-L00128L ENS1J-B28L00256L ENT1J-D28-L00100L ENT1J-D28-L00128L ENW1D-D24-L00064 ENC1D-D28-L00064 ENT1J-D28-M00128 ENC1D-D16-L00256 ENT1D-D16-L00256 ENS1D-C28-L00128 ENS1J-B28-L00100