offering improved design and performance characteristics, the ex20 series provides high precision angular position signals at an affordable price. they are ideally suited for robotic, process control, instrumentation and other related applications. based on an innovative design consisting of a patented disk and hub assembly, reliability is assured through the use of a single led source and collimating lens, with increased reliability by means of duncan s proprietary, single-chip opto-asic detector. this also enables use in signal conditioning applications without need of additional electronics. models ex202 and ex203 offer 74f365 and 74f368 buffer driver outputs, yielding temperature stability and the ability to transmit signals over a long distance with high noise immunity. model ex206 features 26ls31 line driver output, ideal for applications where rs422 compatibility is needed. the ex20 series provides the combination of excellent electronics, reliability, and a lower component count approach, offering enhanced long-term operation and improved temperature stability. standard features line count resolutions up to 2540 ppr high sink current capability (models ex202 and ex203) ?rs422 compatible 26ls31 differential line driver (model ex206) index pulse with gateable option (models ex203 and ex206) flange or servo mount configurations focused ir/led 100khz frequency response w/option to 350khz 2-year warranty ex20 series enclosed incremental rotary optical encoder 1.66 (47) strain relief 8 pin header .125 (3.2) .12 (3) .11 (2.8) .50 (15) .2497 (6,34) +0000 -0003 +000 -002 .687 (17.45) 1.875 (47.6) #4-40 thds. x .20 dp on 1.00 dia. b.c. (25.4) 2.05 (52.3) .18 (4.5) 2.06 sq. 52.3 .125 dia 4 plcs. (3.2) .875 typ. (22.2) figure 1 servo mount figure 2 flange mount (dimensions not shown, same as figure 1) all dimensions in inches .xx = .02 .xxx = .005 15771 red hill avenue tustin, ca 92780-7303 (714) 258-7500 fax: (714) 258-8120 email: sales@beiduncan.com www.beiduncan.com iso9001 certified/qs9000 compliant
ex20 series enclosed incremental rotary optical encoder specifications subject to change without notice. printed in u.s.a. be2055 mechanical dimensions see figures 1 and 2 weight 4 oz. shaft size 0.2497 +0.0000 -0.0003 shaft load axial 4 lbs., radial 8 lbs. torque, starting less than 0.4 oz. in. running less than 0.2 oz. in. inertia 1.8 x 10 -4 oz. in./sec 2 electrical code incremental pulses per revolution see ?rdering information supply voltage +5v 5% @ 135ma max. output format dual channel quadrature w/compliments on all models: index pulse on ex203 and ex206 output type (ex202, ex203) ttl buffer driver output voltage (74f365 and 74f368 or equiv.) sink current 65ma output type (ex206) ttl differential line driver (26ls31 or equiv.) should be terminated into a line receiver (26ls32, or equivalent circuit) frequency response (option to 350khz) environmental temperature operating 0 to +85? (optional to 105? operating) storage -40? to 105? termination options header 8 pin single row pc board header (molex 22-23-2081 or equivalent) mating connector included molex 22-01 3087 or equivalent with crimp terminals for 22-30 awg wire terminal board 1/16" circuit board, one row of 8 holes, 0.40 dia. plated through on 0.10 centers for 22-30 awg wire performance specifications figure 3 pinout table 1 ex20 # - #### - # basic model no. output format 2 = quadrature w/complements (74f365 and 74f368 buffer driver) 3 = quadrature w/index & complements (74f365 and 74f368 buffer driver) 6 = quadrature w/index & complements (26ls31 line driver) pulses per revolution (ppr) see table 1 mounting and termination 1 = servo mount w/header 2 = servo mount w/terminal board 3 = flange mount w/header 4 = flange mount w/terminal board ordering information 87654321 a a *z - index *z- index * ex203 & ex206 only +5v gnd b b example: ex203-1024-3 360 e nom. 180 e nom. 90 e nom. a a b b 90 e to 450 e index **index **index cw rotation of shaft ex202 outputs: a and b w/compliments only as shown above ex203 outputs: a, b and index w/compliments as shown above ex206 outputs: as shown above ** gateable index option available, consult factory figure 4 15771 red hill avenue tustin, ca 92780-7303 (714) 258-7500 fax: (714) 258-8120 email: sales@beiduncan.com www.beiduncan.com available resolutions (ppr): 200, 400, 500, 512, 1000, 1024, 2000, 2048, 2500 and 2540 other resolutions available, consult factory.
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