Introduction
The Sensata BEI Sensors E25 Series Incremental Optical Encoder is designed for light-duty applications, including robotics, precision computer peripherals, and OEM motors and controls. It is designed with an integrated mounting ring and shaft coupling. The integrated mounting ring and shaft coupling allow for simplified installation and a low overall profile when the unit is mounted on a motor. These self-contained mounting and coupling features can reduce interface costs.
Electrical Specifications
| Code | Incremental |
| Output Format | 2 channels in quadrature, 1/2 cycle index gated with negative B channel |
| Cycles Per Shaft Turn | 1 to 28,800
For resolutions above 3,600 consult factory for interpolation options |
| Supply Voltage | 5 to 28 VDC available |
| Current Requirements | 100 mA typical + output load, 250 mA (max) |
| Voltage/Output | 28V/V: Line Driver, 5–28 VDC in, Vout = Vin
28V/5: Line Driver, 5–28 VDC in, Vout = 5 VDC 28V/OC: Open Collector, 5–28 VDC in, OCout |
| Protection Level | Reverse, overvoltage and output short circuit (see note 5) |
| Frequency Response | 100 kHz, up to 800 kHz with interpolation option (see note 7) |
| Output Terminations | See Table 1 at the end of the datasheet |
| Note | Consult the factory for other electrical options |
Mechanical Specifications
| Coupling Bore | 1/4″ and 3/8″ nominal, standard |
| Starting Torque at 25°C | 0.07 in-oz typical shielded; 2.0 in-oz typical SB |
| Bearings | Class ABEC 5 |
| Coupling Material | Aluminum with protective finish |
| Bearing Housing | Die-cast aluminum with protective 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) at rated load |
| Maximum RPM | 10,000 |
| Weight | 13 oz., typical |
| Enclosure Rating | NEMA 2 (IP43) |
Environmental Specifications
| Temperature | Operating, 0° to 70° C; extended temperature testing available (see note 8); Storage, -25° to 90°C unless extended temperature option called out |
| Shock | 50 g’s for 11 msec duration |
| Vibration | 5 to 2000 Hz @ 20 g’s |
| Humidity | 98% RH without condensation |
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