H25 Series Absolute Encoder 01079-003

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.

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.

Disclaimer: Photos and drawings shown are for illustration purposes only, actual product may vary.

Get a Quote

Distributors Stock

Part #01079-003

Need more information?

Features

Synchronous transmission
Transmission lengths to 1000 feet
Accepts clock rates from 100 KHz to 1.8 MHz

Downloads

H25 Absolute Datasheet

Specifications

Mechanical Electrical Environmental

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	Stainless Steel
Bearing Housing	Die cast aluminum with protective finish
Cover	Die cast aluminum with protective finish
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 Intertia	4.1 X 10^-4 oz-in-sec²; 5.2 X 10^-4oz-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 to 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 Analog: 4-20 mA, 0-10V
Voltage/Output	(See notes) 28/V: Line Driver, 5–28 VDC in, Vout = Vin 28/5: Line Driver, 5–28 VDC in, Vout = 5 VDC 28/O: Open Collector, 5–28 VDC in, OCout SSI: : 5–28 VDC In/5Vout
Protection Level	Reverse, overvoltage, and output short circuit protection
Frequency Response	100kHz (1200 RPM for 12-bits, 600 RPM for 13-bits)
Output Terminations	See Table 1 in the datasheet

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 available (see note 5); 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