Features n Two channel quadrature output n Ball bearing option for high operating speed up to 3000 rpm n Bushing or servo mount n RoHS compliant* n Square wave signal n Small size n Resolution to 256 PPR n CMOS and TTL compatible n Long life EN - Rotary Optical Encoder General Information Additional Information The Bourns EN model is a self-contained rotary optical encoder. It produces a 2-bit Click these links for more information: 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. PRODUCT TECHNICAL INVENTORY SAMPLES CONTACT The EN series encoder converts rotary input into electrical signals which can be used by LIBRARY 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. 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 ** See schematic note page 2 ***For resolutions 128 quadrature cycles per shaft revolution. Asia-Pacific: Tel: +886-2 2562-4117 Email: asiacus bourns.com Europe: Tel: +36 88 885 877 Email: eurocus bourns.com The Americas: Tel: +1-951 781-5500 Email: americus bourns.com www.bourns.com WARNING Specifications are subject to change without notice. Cancer and Reproductive Harm Users should verify actual device performance in their specific applications. www.P65Warnings.ca.gov The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of *RoHS Directive 2015/863, Mar 31, 2015 and Annex. this document, and at www.bourns.com/docs/legal/disclaimer.pdf. EN Rotary Optical Encoder 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-m (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 .................................................................................................................................Manufacturers trademark, name, part number, and date code. Hardware .................................................................One lockwasher and one mounting nut supplied with each encoder, except on servo mount versions. Quadrature Output Table OUTPUT VOLTAGE STANDARD RESOLUTIONS AVAILABLE (Full quadrature output cycles per shaft revolution) Channel A 25* 125 50* 128 Channel B 64 200 100 256 1 cycle For Non-Standard ResolutionsConsult Factory 360 90 Clockwise rotation * Channel B leads Channel A 14 mm Optical Encoder Electrical Diagram 5 VDC ENCODER 1 * 1 K CHANNEL A 2 100 * 1 K CHANNEL B 3 LED ASIC N/C OR SIMPLIFIED INDEX SCHEMATIC 4 22 nF 22 nF * * 5 Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the *External pull-up resistors (1K ohms) and filter caps (22 nF) recommended for proper operation. last page of this document, and at www.bourns.com/ Utilization of a filter circuit will yield a typical rise time of 50 microseconds. See schematic. docs/legal/disclaimer.pdf.