1 Bourns Rotary Encoders Short Form Brochure Revision 2
2 Introduction Bourns Sensors and Controls Division has continued to expand its encoder product offering with a wide variety of models to support our customer s specific applications. Recognized worldwide for supplying standard and custom solutions as well as providing excellent technical support, Sensors and Controls is committed to providing our customers with reliable rotary encoder solutions. General Design Consideration Encoders are the digital version of potentiometers and panel controls. Rather than providing a resistive variable output with rotation of the shaft, encoders simulate an on/off switching digital output. Applied as human-to-machine interface (HMI) devices, encoders are typically used to sense human adjustment of the device in a clockwise or counterclockwise direction triggering some action by the digital circuit. Applied as machine-to-machine interface (MMI) devices, encoders are typically coupled to a motor or other mechanical device to sense speed and direction of rotation. Important Characteristics In selecting an encoder for your application, the most important characteristics to consider are the type of technology, type of output signal, speed of rotation, expected cycle life and switching capability of the product. There are two basic technology classifications of encoders: contacting (mechanical) and non-contacting (optical and magnetic). Your application will dictate the type of technology that will be best suited for your design. Custom Solutions A wide range of value-added enhancements are available to provide our customers with cost-effective solutions. Bourns capabilities to develop custom encoder solutions and modifications include the following: Cable Harness/Lead Wires Hardware Detents Marking Custom Output Mechanical Stops Seal Mounting Brackets Torque Special Test Requirements Special Packaging Customized Shaft Options Terminal Configurations For additional information on value-added enhancements, please contact your local Bourns Sales Representative or Field Application Engineer.
3 Encoder Selection Guide Flowchart The flowchart below will assist you in selecting the appropriate encoder model for your application. Encoder Request Output Type Output Type Output Type PWM Rotational Life Absolute Rotational Life Rotational Life < 1M Shaft 1M Shaft < 1M Shaft 1M Shaft 1M Shaft EC EP ES PEC16 PEC12 PEC11 PES EMS22 EM14 EN EA (ACE ) EMS22 EMS22 Magnetic Optical
4 Bourns Encoders 3315 ECW 6 PPR: 100,000 cycles, 16 PPR: 25,000 cycles Resolution Options (PPR) 6, 16 Operating Temp. Range -40 C to +125 C TTL Compatible Loads No 200,000 shaft revolutions Resolution Options (PPR) 6, 9, 12, 24, VDC Miniature package for design flexibility Long operating life Conductive plastic element Bushing or PC board mount Sealed to IP 67 Exceptionally long operating life Sturdy construction Bushing mount Available with PC board mounting bracket (optional) EAW 50,000 shaft revolutions Absolute Resolution Option (States) VDC No Digital output Sturdy construction Bushing mount Available with PC board mounting bracket (optional) EPS 200,000 shaft revolutions Resolution Options (PPR) 6, 9, 12, 24, VDC Momentary push switch option Long operating life Sturdy construction Snap-in mount ES 200,000 shaft revolutions Resolution Options (PPR) 6, 9, 12, VDC Snap-in shaft flexibility - top or bottom Snap-in PC board mount Long operating life Up to 24 full quadrature outputs per revolution PES12 60,000 shaft revolutions Resolution Options (PPR) 24 Operating Temp. Range -10 C to +65 C 1 5 VDC Compact design Long life and high reliability Shaftless Detent option
5 PEC11 30,000 shaft revolutions Resolution Options (PPR) 12, 18, 24 Operating Temp. Range -30 C to +70 C 1 5 VDC Momentary push switch option Compact, rugged design High reliability Metal bushing/shaft PEC12 30,000 shaft revolutions Resolution Options (PPR) 12, 24 Operating Temp. Range -30 C to +70 C 1 5 VDC Compact design Long life and high reliability Momentary push switch option Rear and side mount versions PEC16 100,000 shaft revolutions Resolution Options (PPR) 12, 24 Operating Temp. Range -30 C to +70 C 1 5 VDC Compact design Long life and high reliability Momentary push switch option Rear and side mount versions EM14 Non-detent: 1,000,000 cycles With detents: 100,000 cycles Resolution Options (PPR) 8, 16, 32, 64 Operating Temp. Range -40 C to +70 C TTL, CMOS, HCMOS Optical Compact package size Bracket option High rotational cycle life Standard and high force push switch option Splash proof shaft seal Cable & connector option Sealed to IP 54 EN EMS22 Standard: 10 million shaft revolutions With ball bearings: 200 million shaft revs. Resolution Options (PPR) 25, 50, 64, 100, 125, 128, 200, 256 TTL, CMOS No Optical 100 million shaft revolutions, Absolute and PWM Resolution Options 32, 64, 128, 256, 512/1024 (PPR/States) Operating Temp. Range -40 C to +125 C TTL, CMOS No Magnetic Bushing or servo mount Index channel available High rotational cycle life High operating speed Recommended for HMI and MMI applications Extremely long life High operating speed Bushing or Servo mount 3.3 and 5 VDC voltage supply option 1 or 3 index channels (quadrature output only) Sealed to IP 65 with option of IP 67 and MMI applications
6 Bourns Encoder Applications Professional and Consumer Audio Applications Studio Recording Equipment Digital Mixing Consoles Digital Broadcast Equipment Professional Sound Systems Digital Amplifiers Digital Car Audio Industrial/Factory Automation Applications Robotics Material Handling Forklift Trucks Machine Tools Automated Gates/Doors Fluid Measurement Popular Test and Measurement Product Applications Oscilloscopes Logical and Spectrum Analyzers Signal Level Testers Weather Instruments Digital Monitors Board In-Circuit Testers Calibration Equipment Counters Timers Cycle testers Distortion Testers Electrostatic Testers Environmental Chambers and Testers
7 Popular Medical Product Applications Blood / Chemical Analyzers Centrifuge Equipment Blood Monitors Computer Assisted Tomography (CAT) Equipment Electrosurgical Equipment Dialysis Equipment Incubators Lasers Magnetic Resonance Imaging (MRI) Equipment Medical Meters EKG, EEG, Heart Monitors Temperature and Respiratory Monitors Insulin and Infusion Pumps Radiographic Equipment Strip Charts Respirators Ventilators Popular Portable Electronics Product Applications Data Communication Testers Appliances Intercom Systems Irrigation Controllers Measuring Equipment Power Generators, Radio Systems Portable Monitoring Equipment Portable Test Equipment Portable Weather Stations and Systems Scanners Copiers Multimeters Note: Bourns Encoders are not recommended for critical life support applications.
8 Worldwide Sales Offices Country Phone Fax Benelux: +41 (0) (0) Brazil: China: France: +33 (0) (0) Germany: +49 (0) (0) Ireland/UK: +44 (0) (0) Italy: +41 (0) (0) Japan: Malaysia (KL Office): Malaysia (Penang Office): Singapore: Switzerland: +41 (0) (0) Taiwan: UK/Ireland: +44 (0) (0) USA: Non-Listed European Countries: +41 (0) (0) Technical Assistance Region Phone Fax Asia-Pacific: Europe: +41 (0) (0) Americas: Bourns products are available through an extensive network of manufacturer s representatives, agents and distributors. To obtain technical applications assistance, a quotation, or to place an order, contact a Bourns representative in your area. Specifications subject to change without notice. Actual performance in specific customer applications may differ due to the influence of other variables. Customers should verify actual device performance in their specific applications. ACE is a trademark of Bourns, Inc. Bourns is a registered trademark of Bourns, Inc. in the U.S. and other countries. COPYRIGHT 2008, BOURNS, INC. LITHO IN U.S.A. CP 08/08 2M/SC0845
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