H25 Incremental
Position Sensors & Encoders
The H25 is the flagship of the BEI Sensors product line. It was designed from the ground up for the industrial marketplace. The H25 offers features such as EMI shielding, 40 lb. ABEC 7 bearings, matched thermal coefficients on critical components, and custom high efficiency optics. The encoder meets NEMA 4 and 13 requirements when ordered with the shaft seal.
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Specifications
| Shaft Diameter | 3/8” nominal (1/2” as special feature) |
| Flat On Shaft | 3/8” Shaft: 0.80 long X 0.03” deep; 1/2” Shaft: 0.80 long X 0.04” deep (1/2’’ shaft w/flat must be ordered as special feature) |
| Shaft Loading | 3/8” shaft: Up to 40 pounds axial and 35 pounds radial; 1/2” shaft: Up to 90 pounds axial and 80 pounds radial |
| Shaft Runout | 0.0005 T.I.R. at midpoint regardless of shaft diameter |
| Starting Torque at 25°C | Without shaft seal 1.0 in-oz (max); With shaft seal 2.5 in-oz (max); 1/2” shaft with shaft seal: 3.5 in-oz (max) |
| Bearings | Class ABEC 7 standard, ABEC 5 for 1/2” shaft |
| Shaft Material | 416 stainless steel |
| Bearing Housing | Die cast aluminum with protective finish; stainless steel (special feature) |
| Cover | Die cast aluminum; stainless steel (special feature) |
| Bearing Life | 2 X 108 revs (1300 hrs at 2500 RPM) at rated load 1 X 1010 revs (67,000 hrs at 2500 RPM) at 10% of rated load |
| Maximum RPM | 12,000 RPM nominal, 8000 RPM with 1/2” shaft (see Frequency Response, below) 30,000 RPM available on units with 3/8” shaft—consult with factory |
| Moment of Inertia | 4.1 X 10-4 oz-in-sec2; 5.2 X 10-4 oz-in-sec2 with 1/2” shaft |
| Weight | 13 oz typical, 14.5 oz typical with 1/2” shaft |
| Code | Incremental |
| Output Format | 2 channels in quadrature, 1/2 cycle index gated with negative B channel |
| Cycles per Shaft Turn | 1 to 72,000 (see table 2) For resolutions above 3,600 see BEI for interpolation options |
| Supply Voltage | 5 to 28 VDC available |
| Current Requirements | 100 mA typical +output load, 250 mA (max) |
| Voltage/Output | (see note 5) 15V/V: Line Driver, 5–15 VDC in, Vout = Vin 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 1MHz with interpolation option (see note 7) |
| Output Terminations | See Table 1 |
| Note | Consult factory for other electrical options |
| Enclosure Rating | NEMA 4 & 13 (IP 66) when ordered with shaft seal (on units with an MS connector) or a cable gland (on units with cable termination). |
| Temperature | Operating, 0º to 70º C; extended temperature testing up to 105°C available; Storage, -25º to 90º 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 |