H38 Series Incremental Encoder
Position Sensors & Encoders
The H38 is an explosion proof version of the field-proven H25 encoder series. The H38 is UL certified for NEMA Class 4X and 6 (outdoor nonhazardous locations) and Class 4X and 13 (indoor non-hazardous locations). It is available with single and triple certifications for use in hazardous locations and includes a standard shaft seal, double bearing seals, and a cast aluminum housing with hard anodized and dichromate sealed finish. The H38 is suitable for use in petroleum service industries, solvent refining operations, spray painting applications, and explosive dust environments.
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Contact UsSpecifications
| Shaft Diameter | 3/8” nominal |
| Shaft Loading | Up to 40 pounds axial and 20 pounds radial applied 1/4” from housing |
| Shaft Runout | 0.0005 T.I.R |
| Starting Torque at 25°C | 4.0 in-oz (max) |
| Bearings | Class ABEC 7 standard |
| Shaft Material | 303 stainless steel |
| Enclosure | Die cast aluminum, hard anodized with dichromate sealed finish. Shaft seals and sealed bearings are standard to achieve environmental ratings. |
| 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 | 10,000 RPM |
| Moment of Inertia | 4.1 X 10-4 oz-in-sec2 UL & MSHA/ 1.7 X 10–3 oz-in-sec2 CEN |
| Weight | 64 oz typical (approx 4 lbs) |
| 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, page 5). For resolutions above 3,600 see Note 7. |
| Supply Voltage | 5 to 28 VDC |
| Current Requirements | 100 mA typical +output load, 250 mA (max) |
| Voltage/Output | 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 3) |
| Frequency Response | 100 KHz Typical, Higher frequency response available, see note 5 |
| Termination Type | Compression type, UL recognized. Accepts AWG 14 to 22, stranded wire, strip 1/4” |
| Note | Consult factory for other electrical options |
| Enclosure Rating | NEMA 4 X & 6 (IP66), outdoor Non-Hazardous locations, NEMA 4 X & 13 (IP66), indoor Non-Hazardous locations |
| Temperature | Standard operating all models, 0° to +70°C; Storage all models, -50° to +90°C; Extended temp testing avail.: for UL, -40° to +80°C; for CEN, -50° to +90°C |
| Shock | 50 g’s at 11 msec |
| Vibration | 5 to 2000 Hz @ 20 g’s |
| Humidity | 100% RH |
| Hazardous Area Rating | UL listed for use in hazardous locations. Class I, Group D, or Class I, Groups C & D, and Class II,Groups E, F & G. NEMA Enclosure 7. |
