Netzer ds 70-specsheet
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The document provides information on the DS-70 absolute position rotary electric encoder. Some key details include: - It has a low profile of 10mm, hollow floating shaft, and is very durable with high tolerance to temperature, shock, EMI, etc. - It provides absolute position output signals in either analog sine/cosine or SSi digital format. - It has very high accuracy down to 10 arc seconds with 19-bit resolution. - Installation and mounting options are included along with mechanical, electrical, and performance specifications.
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Netzer ds 70-specsheet
- 1. DS-70 Data Sheet , V 2.0 ,Nov. 2012 DS-70 Absolute position, rotary Electric Encoder™ The DS-70 is a member of the DS series of Electric Encoders, based on Netzer Precision proprietary technology. These encoders offer many advantages, some unparalleled: Low profile (10 mm). Hollow, floating shaft. No bearings or other contacting elements. High precision. High tolerance to temperature, shock, moisture, EMI & RFI. Insensitive to magnetic fields. Very low weight. The DS-70 is suited to demanding application such as: aerospace, medical, instrumentation, automation, etc. The holistic structure of the Electric Encoder™ provides generous mounting tolerance, thus obviating the need for internal ball bearings. The lack of bearings and components such as flexible couplers, glass disc, light sources and detectors, along with very low power consumption makes the DS-70 encoder virtually failure free. The internally shielded, DC operated Electric Encoder™ includes an electric field generator, a field receiver, a sinusoidal shaped dielectric rotor, and processing electronics. The outputs signals of DS-70 Electric Encoder™ are analog Sine / Cosine representing the rotation angle, incremental or absolute position. Mechanical Allowable mounting eccentricity (operational) ±0.1 mm Allowable rotor axial motion (operational) ±0.1 mm Rotor inertia 1.7 gr · mm2 Total weight 35gr Outer diameter / Inner diameter / Profile 70 /30 /10 mm Material (stator, rotor) Ultem™ polymer Material mounting clamps , M2 S.S. Electrical Supply voltage 5V ± 5% Interconnection Ø 3 mm Shielded cable Environment EMC IEC 6100-6-2, IEC 6100-6-4 Operating temperature range -40°C to +85°C Relative humidity <98 % - non condensing Shock endurance IEC 60068-2-27 100 g for 11 ms Vibration endurance IEC 60068-2-6 20 g 10 – 2000 Hz Protection IP 40 Performance Electrical Cycles – Fine/Coarse channels 64 / 3 Angular resolution (using 12 bit A/D conversion) 19 bits Static error (with offset compensation) < 10 mDeg (0.17mrad) Maximum operational speed 750 rpm Measurement range Unlimited rotation Output SSi absolute position BIT (build in tests , optional) Included (SSi version) Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
- 2. Digital - SSi Interface (absolute position) DS-70 Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com Synchronous Serial Interface (SSi) allows for serial transmission of absolute position data from the Electric Encoder™ responding to controller clock pulses. The Encoder and controller are linked by clock and data differential signal lines. Monoflop - 2 - Output signal parameters Signal latency ~250 μSec Output code Binary Serial output SSi Differential RS-422 Clock SSi Differential RS-422 Monoflop time 25 μSec Clock Frequency 0.5 ÷ 2.5 MHz Position update (Max) 29 KHz Electrical parameters Current consumption ~ 180 mA SSi - Wires color code # Name Color Function 1 Clock + Grey SSi Clock 2 Clock - Blue 3 Data - Yellow SSi Data 4 Data + Green 5 GND Black Ground 6 +5V Red Power supply t1 T n * T t3 Clock n n - 1 1 0 t2 MSB LSB Data n = total number of data bits. T = clock period (sec) - user defined. 1/T = clock frequency 0.5 ÷ 2.5 MHz (user defined). t1 = minimum time required for the encoder to freeze data and preset the shift registers before receiving the first rising edge to prompt the MSB t2 = data transmission delay (increases with cable length) t3 = required delay to refresh position data between subsequent position reads.
- 3. Digital - SSi Interface (absolute position) DS-70 Software tools: Sold & Serviced By: Advanced calibration and monitoring options available by using the Electric Encoder Explorer software ( factory supplied ) using the NCP (Netzer Communication Protocol) , the Encoder Explorer enables: ResoluƟ on In bits Steps /360° mDeg /step Arc-sec /step mRad /step 18 262,144 1.3733 4.9438 0.024 19 (DS-70) 524,288 0.6866 2.4719 0.012 20 1,048,576 0.3433 1.236 0.006 - 3 - A. Calibration, built-in tests (BIT) and advanced setup. B. Proper mechanical mounting - setup and validation c. Calibration , offsets , CAA and user defined “zero”. Rotor mounting options for stepped shaft End of shaft Mid shaft Installation kit’s CAT # End of stepped shaft : MA-DS70-004 Middle of steeped shaft : MA-DS70-002 DS-70 rotor 0.05mm S.S. Shims : DS-70-R-01 ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
- 4. - n n n Interconnection options - 4 - DS-70 Ordering DS Product line OD mm Outputs: S - Digital : SSi Sold & Serviced By: 0 - Loose wires 250 mm S - shielded cable R - Strain relief & shielded cable Resolution Binary Code Bit CPR F 17 131,072 G 18 262,144 H 19 524,288 Resolution Decimal Code Bit CPR O 17 128,000 P 18 256,000 Q 19 512,000 DS - 70 - 64 - S- - S Fine EC/R H C 0 - flying leads C- connector ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
- 5. Netzer Cat No.: CB00014 30 AWG twisted pair (3) : 2 (30 AWG 25/44 tinned copper , 0.15 PFE to Ø0.6 ± 0.05 ). Provider: Ray-Q USA. Cable: Three 30 AWG twisted pairs. Shield: Tinned copper braided 95% min. coverage. Jacket: 0.45 silicon rubber to Ø3.45 ±0.2 - 5 - DS-70 Mounting options $ $ “ 6(7,21$$ 6$/( $ ' ( ) % ' Sold Serviced By: $ % 1RWHV
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