L25 INCREMENTAL OPTICAL ENCODER Introduction The L25 is a lighter duty version of BEIs H25 optical encoder Incorporating the same high quality optics and electronics as the H25, the L25 also offers low starting torque. Other features include ABEC 5 bearings, EMI shielding, a 1/4 diameter stainless steel shaft and a drawn aluminum cover. Typical applications include use with light machine tools, test and laboratory instrumentation, the biomedical industry and flow metering. MECHANICAL SPECIFICATIONS Shaft Diameter 1/4 nominal Flat On Shaft 0.80 long x 0.03 deep Shaft Loading up to 5 lbs. axial and 8 lbs. radial Shaft Runout .0005 T.I.R. maximum 0.07 in-oz typical, 0.12 in-oz maximum without sealed Starting Torque at 25C bearings 0.50 in-oz typical, 1.0 in-oz maximum with sealed bearings Bearings Class ABEC 5 Shaft Material 416 stainless steel Bearing Housing Die cast aluminum with iridite finish Drawn aluminum, 0.060 wall, protective finish standard. Die cast aluminum Cover with protective finish for EM, SM, ECS and SCS terminations 9 Bearing Life 1 X 10 revs (6,700 hrs at 2500 RPM) Maximum RPM 10,000 RPM -4 2 Moment of Inertia 4.1 x 10 oz-in-sec Weight 13 oz. typical Page 1 Copyright 2018 Sensata Technologies, Inc. www.sensata.comELECTRICAL SPECIFICATIONS Code Incremental Cycles per Shaft Turn 1 to 28,800 (see note 5) 15V/V: Line Driver, 515 VDC in, V = Vin out Voltage/ Output 28V/V: Line Driver, 528 VDC in, V = Vin out 28V/5V: Line Driver, 528 VDC in, V = 5 VDC out 28V/OC: Open collector, 528 VDC in, OC out Current Requirements TTL: 175 mA maximum 125 mA typical 2 channels in quadrature = 27 electrical typical. Output Format Optional index is typically gated 1/2 cycle wide (see figure 1) Protection Level Reverse, overvoltage and output short circuit (4469, 7272 only) Frequency Response 100 KHz (see note 7), up to 800 KHz with interpolation option Output Terminations (See Table 1) ENVIRONMENTAL SPECIFICATIONS Enclosure Rating NEMA 2 (IP43) Operating, 0 to 70 C extended temperature Temperature testing available (see note 8) storage -25 to 90 C Shock 50 gs for 11 msec duration Vibration 5 to 2000 Hz 20 Gs Humidity 98% RH without condensation DIMENSIONS L25G - M16 or M18 Optional Face Mounts Page 2 Copyright 2018 Sensata Technologies, Inc. www.sensata.com