S

PECIFICATIONS

SeeNoteModel 9111S Model 9211S
NOTES:1. Total Optical Encoder Error is the algebraic sum of Instrument Error + Quadrature Error + Interpolation Error. Typically, these error sources sum to a value less than the theoretical maximum. Error is guaranteed at 20°C and is defined at the signal transitions. It does not include quantization error, which is ±1/2 quantum. ("Quantum" is the final resolution of the encoder, after user's 4X quadrature decode.)2. Instrument Error is the sum of disc pattern errors, disc eccentricity, bearing runout and other mechanical imperfections within the encoder. This error tends to vary slowly around a revolution.3. Quadrature Error is the combined effect of phasing and duty cycle tolerances and other variables in the basic analog signals. This error applies to data taken at all four transitions within a cycle; if data are extracted from 1X square waves on a 1X basis (i.e., at only one transition per cycle), this error can be ignored. Error in arcminutes = (60) x (error in electrical degrees) / (disc line count)4. Interpolation Error is present only when the resolution has been electronically increased to more than four data points per optical cycle. It is the sum of all the tolerances in the electronic interpolation circuitry. Error in arcminutes = (21600) x (error in quanta) / (counts/rev)5. With external Model HR2 High Resolution Electronics. Frequency response is as stated for output signals, or 50 kHz at the disc, whichever is limiting.6. If higher load capacity is required, consult factory. Max. line count on disc1800 Max. cycles/rev (with internal electronics)1800 Max. counts/rev (after quadrature decode byuser)7200 Max. cycles/rev (with external electronics)5 N/A 36,000 Max. counts/rev (after quadrature decode byuser)5 N/A 144,000 Instrument error, ± arcmin (at 20°C)1, 22.5 0.8 Quadrature error, ± electrical degrees (at 20°C)1, 330 Interpolation error, quanta1,4,5N/A 0.1 Frequency response, kHz (1x square waves)100 Frequency response, kHz (up to 20 x squarewaves)5 N/A 1,000 Max. weight, oz (g)2 (57) Starting torque, in-oz (N-m) @20°C0.02 (1.4 x 10
-4 -5 ) Running torque, in-oz (N-m) @20°C0.005 (3.5 x 10
2 2 -6 ) Moment of inertia, in-oz-s
2 (g-cm )8.6 x 10

Buffered Sinusoids

(0.61) Max. acceleration, rad/s

9211 onlyThe output device is an op amp referenced to (50% ±3%) x Vcc. Typical signal roll-off at 100 kHz

3 x 10
6

(output code 'B') IndexExtended Resolution

Operating temperature, °F (°C)32 to 158 (0 to 70) 32 to 122 (0 to 50) Storage temperature, °F (°C)0 to 160 (-18 to 71) Humidity, % rh, non-condensing98 Shock50 g, 11 ms Vibration15 g, 0-2000 Hz BearingsABEC 7, grease-lubricated and sealed Max radial shaft load, lb (N)63 (13) Bearing life (with 0.75 lb radial load)1 x 10
9 revolutions

Input Power (excluding customer load)Output Device OptionsSquare Waves (output code 'L') +5 VDC @ 75 mA (150 mA for 9211S)+12 or +15 VDC @75 mA max. (9111S only)EIA/RS-422 balanced differential line driver on all channels, protected to survive an extended-duration short circuit across its output. May be used single- ended for TTL-compatible inputs. The encoder's complementary output voltages will typically swing to within two volts of the applied power supply input voltage rail. The high-voltage-capable line driver can sink or source up to 70 mA, and can readily interface to controllers requiring 12 or 15 volt "open collector" type signals. 3dB. Signal values at 1 kHz with 4.7 load to ground (20°C): P-P signal amplitude, data channels: 1.0±0.1 V. Amplitude ratio, min chan to max chan: 0.90 to 1.00 P-P signal amplitude, index channel: 0.7±0.3V. Index is standard and it is ungated with a width of 360 ±180 electrical.The series 911S offers resolution up to 7,200 counts/rev (3 arcmin/count) after 4X quadrature-edge detection. If finer resolution is required (up to 144,000 counts/rev, or 9 arcsec/count), the

HR2A external electronics package can be used with the 9211S. This provides a wide range of options that ensures compatibility with virtually all commercially available industrial counter circuits, dedicated encoder interface cards and programmable logic controllers:

ENCODEREIA/RS-422 DRVRTWISTED PAIREIA/RS-422 RCVR 100

Any number of quadrature square waves from 1 to 20 times the line count on the disc. Fixed-duration pulses at 1, 2 or 4 times any integer from 1 to 20. A choice of CW/CCW or PULSE/DIRECTION output pulse format. A zero-index (reference) signal in either gated ½ cycle, gated ¼ cycle, or fixed-duration pulse format.

SUGGESTED EIA/RS-422 TRANSMISSION LINE TERMINATION FOR +5V INPUT VERSION.

EIA/RS-422 or open-collector line drivers. On-board low-dropout voltage regulator. Refer to the HR2A data sheet for full details. As part of our continuing improvement program, these specifications are subject to change without notice.

9x11S

Gurley Precision Instruments514 Fulton StreetTroy, NY 12180 U.S.A.(800) 759-1844, (518) 272-6300, fax (518) 274-0336, Online at www.gurley.com, e-mail: info@gurley.com

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