H25 Series Parallel, Analog, SSI
Position Sensors & Encoders
Long considered the industry standard for shafted incremental encoders, the Model H25 is now available in an absolute version with up to 13 Bits of resolution. It incorporates many of the great standard features of the incremental version, including: EMI shielding, 40-lb ABEC 7 bearings, matched thermal coefficients on critical components, and custom optics.
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This encoder features a 12 or 13 Bit absolute parallel gray code output, a selection line for count direction, and an output latch as standard. Output is standard gray code with options for natural binary or SSI compatible signals. Signals can be provided in either a single-ended multi-voltage line driver (TTL compatible when provided with 5 volts) or as an open-collector style of output. Typical applications include dam gate control, cranes, telescopes, tool changers, and robotics.
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Specifications
| Shaft Diameter | 3/8” (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 a 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 | 12 or 13 bits NB or GC; excess gray and BCD available |
| Counts Per Shaft Turn | 4096 or 8192 |
| Count Transition Accuracy | ± 1/2 bit maximum |
| Supply Voltage | 5–28 VDC |
| Current Requirements | 120 mA typical |
| Output Formats |
Parallel: Gray Code, Natural Binary and Binary Coded Decimal; Serial: Serial Synchronous Interface (SSI) compatible; Analog: 4–20 mA, 0–10V |
| Voltage/Output |
(see note 3) 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 SSI: 5–28 VDC In/5Vout |
| Protection Level | Reverse, over-voltage and output short circuit protection |
| Frequency Response | 100kHz (1200 RPM for 12-bits, 600 RPM for 13-bits) |
| Output Termination Pinouts | see Table 1, page 7 |
| CE | EN 55011 and EN 61000-6-2 |
