The L25 is a lighter duty version of BEI’s 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.
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Contact UsShaft 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 |
Starting Torque at 25°C | 0.07 in-oz typical, 0.12 in-oz maximum without sealed 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 |
Cover | Drawn aluminum, 0.060” wall, protective finish standard. Die cast aluminum with protective finish for EM, SM, ECS and SCS terminations |
Bearing Life | 1 X 109 revs (6,700 hrs at 2500 RPM) |
Maximum RPM | 10,000 RPM |
Moment of Inertia | 4.1 x 10-4 oz-in-sec2 |
Weight | 13 oz. typical |
Code | Incremental |
Cycles per Shaft Turn | 1 to 28,800 |
Voltage/Output | 15V/V: Line Driver, 5–15 VDC in, Vout = Vin 28V/V: Line Driver, 5–28 VDC in, Vout = Vin 28V/5V: Line Driver, 5–28 VDC in, Vout = 5 VDC 28V/OC: Open collector, 5–28 VDC in, OCout |
Current Requirements | TTL: 175 mA maximum 125 mA typical |
Output Format | 2 channels in quadrature = 27º electrical typical. Optional index is typically gated 1/2 cycle wide (see datasheet) |
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 datasheet, Table 1) |
Enclosure Rating | NEMA 2 (IP43) |
Temperature | Operating, 0º to 70º C; extended temperature testing available (see note 8); storage; -25º to 90º C |
Shock | 50 g’s for 11 msec duration |
Vibration | 5 to 2000 Hz @ 20 G's |
Humidity | 98% RH without condensation |