User`s Manual
Contents
1. used to sense the 16 transitions of the slotted disc With these transitions controller is able to recognize the rotary angle of the disc With this concept a rotary encoder can be employed in a DC motor shaft for the controller to know its current position This rotary encoder kit has been design with the features of e Industrial grade PCB with high reliability yet professional outlook e Every component is soldered properly and every kit is tested before being shipped to customer e Simple 3 pin interface 5 Gnd and Sig e Included On board green LED as indicator e Direct connection to microcontroller internal pull up to 5V e Up to 1 KHz 1000 pulse sec e Disc size 35mm outer diameter x 3mm inner diameter e Sensor board size 12mm height x 35mm length x 15mm width This document explains the method to use REO8A 2 PAKAGING LIST Please check the parts and components according to the packing list If there are any parts missing please contact us at sales cytron com my immediately 1 1 x REO8A sensor board 2 1x 8 slots disc 3 PRODUCT SPECIFICATION Electrical Characteristics Symbol Parameter Min Typ Max Unit 5 Sensor board supply voltage 4 5 5 5 5 V Gnd System Ground 5 V Sig Signal output 0 5 3 V Viow Voltage during low stage 5 5V 0 0 8 1 0 V V high Voltage during high stage 5 5V 4 5 47 4 9 V f Output frequency 0 1 KHz Ton C2. Cytron REO8A Rotary Encoder Kit User s Manual V1 2 September 2008 Information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by updates It is your responsibility to ensure that your application meets with your specifications No representation or warranty is given and no liability is assumed by Cytron Technologies Incorporated with respect to the accuracy or use of such information or infringement of patents or other intellectual property rights arising from such use or otherwise Use of Cytron Technologies s products as critical components in life support systems is not authorized except with express written approval by Cytron Technologies No licenses are conveyed implicitly or otherwise under any intellectual property rights STONA SE eds GOP obo ae Index Introduction and Overview Packaging List Product Specification Board Layout Installation hardware Getting Started Warranty ONAN Dn A Q 10 1 INTRODUCTION AND OVERVIEW REO8A is a rotary encoder kit which comes with a slotted disc 8 slots and a simple interface sensor board No further soldering is required Rotary encoder is a sensor or transducer used to convert the data of rotary motion into a series of electrical pulses which is readable by controller The slotted disc has a 35mm outside diameter with 8 slots that provides 16 transitions The optical sensor is
3. ler input pin Normally the Sig will be connected to Counter Clock Encoder input for automatic counting purpose Note Please DONOT connect wrong polarity input to sensor board This will ruin the sensor Second portion of hardware installation is the slotted disc This disc should be mounted to motor shaft or gear output as shown in following figure Shaft Slotted Disc To get the rotation output from rotating shaft the slotted disc must be placed within the space between optical sensor as shown in the following picture Note Please DONOT break the slot of slotted disc during installation 6 GETTING STARTED After installation the rotary encoder is ready to count the rotation of output shaft This information can further be calculation to obtain speed of output shaft or the velocity of motor This kit is very simple and compact connect to any microcontroller via the 3 pin header The onboard infrared beam detects missing slots in a slotted encoder disk and generates a pulse train The generated pulses are a 0 to 5V output It provide a 5V output when the optical beam is blocked and a OV output when the beam is unblocked The microcontroller can simply read the 0 5 OV pulse train to determine the distance of robot if the shaft is mounted to wheel and the wheel diameter is known of course it can further be used for velocity Simply follow the installation guide and configure microcontroller to count the pulses ge
4. nerated when the shaft rotates Software configuration is not covered in this document as there are too many type of microcontroller and each of them have different configuration Please refer to related data sheet of each microcontroller for the configuration details 7 WARRANTY gt Product warranty is valid for 6 months gt Warranty only applies to manufacturing defect gt Damage caused by mis use is not covered under warranty gt Warranty does not cover freight cost for both ways Prepared by Cytron Technologies Sdn Bhd 19 Jalan Kebudayaan 1A Taman Universiti 81300 Skudai Johor Malaysia Tel 607 521 3178 Fax 607 521 1861 URL www cytron com my Email support cytron com my sales cytron com my
5. urrent at low state 25 30 40 mA Ioff Current at high state 5 10 20 uA Topr Operating Temperature 0 25 75 2C Truth Table in Normal Operating Condition 5 5V Optical Signal LED status sensor Comment Unblocked OV ON Low state at Sig output pin Blocked 5V OFF High state at Sig output pin Blocked The center space blocked by the slotted disc 4 BOARD OR PRODUCT LAYOUT Label Function Label Function A Optical Sensor D Signal output pulse output B 5 input supply E Indicator LED C Ground Negative of supply Optical sensor at A will detect the missing slot of disc when the disc rotate further generate pulses at signal pin Header pin at B is input supply User should connect 5V to this pin Header pin at C is ground of 5V supply or in other words the negative terminal of supply Header pin at D is signal output of sensor board This pin is internally pull up to 5V thus no extra component is needed for this sensor to be connected to controller LED at E is an indicator This LED will light ON if the disc does not block the optical sensor 5 INSTALLATION HARDWARE The hardware installation is divided into two parts The first part is sensor board Following figure shows example of wiring from sensor board to a microcontroller Simply connect the 5 and Gnd to 5V supply further connect the Sig pin to microcontrol
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