optek reserves the right to make changes at any time in or der to improve design and to s upply the best product possible. incremental hollow shaft encoder ope1275h single channel (tachometer) ope2275h dual channel optek technology inc. ? 1645 wallace drive, carrollton, texas 75006 phone: (972) 323-2200 or (800) 341-4747 fax: (972) 3 23-2396 sensors@optekinc .com www. optekinc.com issue a .4 10/09 page 1 of 4 applications: ? printer motors ? machine automation ? machine safety features: ? o.d. = 28mm [1.10?] ? motor shaft diameter 2 mm [0.079?] ? motor shaft length 3.8 mm [0.150?] minimum ? pulses per revolution 256 maximum ? analog output ? 100 - 5,000 rpm description: the ope1275h and ope2275h are designed for small shafted motors with a shaft diameter of 2 mm [0.079?] and a minimum length of 3.8 mm [0.150?]. the ope1275h provides a single channel analog output for speed of rotation while the ope2275h provides a dual channel analog output for speed and direction of rotation. the output of the ope1275h provides a rise and fall pulse providing the designer two slopes for each pulse doubling the count capability. the ope2275h provides quadrature rise and fall pulse patterns providing the design engineer 4 times the pulse per revolution count. the ope1275h and ope2275h are very easy to assemble on your mo tor shaft using a #1 phillips screwdriver. power requirements are 5 volts .5 volts. electrical connection is achieved with a 4-pin molex 53 048-0410 connector providing v+, ground and output pins. the mating connector is a 4-pin molex 51021-0400 (terminal pin 50058 or 50079) or equivalent. mounting of the hollow shaft version of the ope1275 and ope2275 is achieved with a stick-on transfer adhesive pre-applied to the back of the housing. just peel off t he protective base and press the encoder to your motor. frequency response is from dc to 25 khz providing a maximum of 256 cycles per revolution (cpr) this product is designed for general encoding for low-speed applications. rohs ordering information ope x 275 h - zzz optek product encoder resolution per revolution: 128 holes per revolution channels: 256 holes per revolution 1 = single channel 2 = dual channel shaft configuration: h = hollow shaft motor diameter- 27.5mm
optek reserves the right to make changes at any time in or der to improve design and to s upply the best product possible. incremental hollow shaft encoder ope1275h single channel (tachometer) ope2275h dual channel optek technology inc. ? 1645 wallace drive, carrollton, texas 75006 phone: (972) 323-2200 or (800) 341-4747 fax: (972) 3 23-2396 sensors@optekinc .com www. optekinc.com issue a.4 10/09 page 2 of 4 ope1275h ope2275h 1 2 3 4 v cc ch a ch b gnd pin out pin #1
optek reserves the right to make changes at any time in or der to improve design and to s upply the best product possible. incremental hollow shaft encoder ope1275h single channel (tachometer) ope2275h dual channel optek technology inc. ? 1645 wallace drive, carrollton, texas 75006 phone: (972) 323-2200 or (800) 341-4747 fax: (972) 3 23-2396 sensors@optekinc .com www. optekinc.com issue a .4 10/09 page 3 of 4 electrical characteristics (t a = 25 c unless otherwise noted ? for reference only) symbol parameter min typ max units test conditions v cc supply voltage 4.5 5.0 5.5 v i cc supply current - 21 27 ma v cc = 5.0 volts v oh high level output voltage vcc-0.5 - - v i c = 100 a v ol low level output voltage - - 0.4 v i c = 20 ma tr rise time - 500 - ns 10% to 90%, v cc = 5.0 volts tf fall time - 100 - ns 10% to 90%, v cc = 5.0 volts fr frequency response - - 60 khz h.s. hole size 0.10 - - inch rotation maximum speed of rotation with 1024 holes per rotation - - 100 rev/sec encoding characteristics: se symmetry error 0 16 75 e qe quadrature error?ope2275h only 0 12 60 notes: 1. all parameters measured using pu lse technique, vcc = 5.0 volts and t a = 25c. absolute maximum ratings (t a =25c unless otherwise noted) maximum units storage temperature range -40 o c to +85 o c operating temperature range 0 o c to +85 o c power supply voltage v cc 4.5 to 5.5 v dc power dissipation (2) 250 mw vibration (5 hz to 2 khz) 20 g shaft axial play 0.51 mm [0.02?] off-axis mounting tolerance 0.254 mm [0.01?] acceleration 250,000 rad/sec 2 mechanical specifications: dimensions units moment of inertia 6.48 x 10 -5 oz-in-s 2 shaft length 0.3 to 0.7 inches
optek reserves the right to make changes at any time in or der to improve design and to s upply the best product possible. incremental hollow shaft encoder ope1275h single channel (tachometer) ope2275h dual channel optek technology inc. ? 1645 wallace drive, carrollton, texas 75006 phone: (972) 323-2200 or (800) 341-4747 fax: (972) 3 23-2396 sensors@optekinc .com www. optekinc.com issue a.4 10/09 page 4 of 4 timing definitions: ppr = pulses per revolution electrical degree (e) = 1/360th of 1 cycle cycle = 360 electrical degrees (e) symmetry = relationship between x & y in electrical degrees (e). position error = the difference between the actual shaft position and the position indicated by the encoder cycle count. quadrature: the lead or lag difference between channels ?a? and ?b? in electrical degrees (normally 90e) cycle error = the difference between the actual shaft rotational position and the cycle count rotational position. rise time = time required to switch between 10% and 90% of the highest to lowest signal levels. fall time = time required to switch between 90% and 10% of the highest to lowest signal levels. timing diagram: hollow shaft assembly instructions: make sure the kit has all required parts: ? 1 each base unit ? 1 each base unit alignment tool ? 1 each aperture plate ? 1 each encoder wheel assembly ? 1 each wheel assembly alignment tool ? 1 each reflective lid ? 4 each #2-56 self tapping screws 1. peal the protective covering from the adhesive on the back of the base unit. 2. to center the base unit, carefully slide the base unit over the flange on the motor and press firmly. 3. place the aperture plate on the base unit. 4. slide the encoder wheel as sembly over the motor shaft until it almost touches the aperture plate. 5. carefully place the reflec tive lid on the encoder (rotate as necessary to align) and attach with 4 #2 self tapping screws (provided). 6. connect the electrical interface to the encoder. #2 screws reflective lid encoder wheel assembly aperture plate base unit adhesive cover
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