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 shaft encoder ope1275s single channel (tachometer) ope2275s 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 10/09 page 1 of 4 applications: ? printer motors ? machine automation ? machine safety features: ? body o.d. = 28mm [1.10?] ? shaft diameter 6.35 mm [0.25?] ? 3/8?-32 unf thread ? pulses per revolution 256 maximum ? analog output ? 100 - 5,000 rpm description: the ope1275s and ope2275s are designed for small shaft motors. the ope1275s provides a single channel analog output for speed of rotation while the ope2275s provides a dual channel analog output for speed and direction of rotation. the output of the ope1275s provides a rise and fall pulse providing the designer two slopes for each pulse doubling the count capability. the ope2275s provides quadrature rise and fall pulse patterns providing the design engineer 4 times the pulse per revolution count. 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. frequency response is from dc to 25 khz providing a maximum of 256 cycles per revolution (cpr) and 1024 quadrature states per revolution (ppr). this product is designed for general encoding for low-speed applications. the ope1275s and ope2275s are fully assembled and ready to be connected to your application. rohs ordering information ope x 275 s - zzz optek product encoder resolution per revolution: 128 holes per revolution channels: 256 holes per revolution 1 = single channel 2 = dual channel shaft configuration: motor diameter- 27.5mm s = extended shaft
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 shaft encoder ope1275s single channel (tachometer) ope2275s 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 10/09 page 2 of 4 ope1275s ope2275s 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 shaft encoder ope1275s single channel (tachometer) ope2275s 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 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? ope2275 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 shaft encoder ope1275s single channel (tachometer) ope2275s 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 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:
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