Netzer ds 25-specsheet
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The DS-25 is an absolute position rotary encoder that offers high precision, low profile, and tolerance to temperature, shock, and electromagnetic interference. It provides either analog sine/cosine or Synchronous Serial Interface position outputs and is suited for applications such as aerospace, medical, and automation. The encoder has no bearings or contacting elements, making it virtually failure-free, and provides unlimited rotational measurement in a small, lightweight package.
Netzer ds 25-specsheet
- 1. DS-25 Data Sheet , V 2.0b ,June 2013 DS-25 Absolute position, rotary Electric Encoder™ The DS-25 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 (8 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-25 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-25 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-25 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 11.13 gr · mm2 Total weight 4gr Outer diameter / Inner diameter / Profile 25/6/7mm Material (stator, rotor) Ultem™ polymer Material mounting clamps , M2 Ultem™ Electrical Supply voltage 5V ± 5% Interconnection Ø 3.5 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 16 / 3 Angular resolution (using 12 bit A/D conversion) 17 bits Static error (with offset compensation) < 15 mDeg (0.262mrad) Maximum operational speed 1,500 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-25 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. n n - 1 1 0 - 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) 30 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 t2 MSB LSB Data Monoflop Recommendations n total number of data bits T clock period (sec) user defined 1/T clock frequency 0.5 ÷ 2.5 MHz (user defined) 2.5 MHZ 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 T/2 t2 data transmission delay (increases with cable length) “0” on standard cable length t3 equired delay to refresh position data between subsequent position >25usec
- 3. Digital - SSi Interface (absolute position) DS-25 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: - 3 - ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
- 4. Analog - Sine / Cosine , 1 Vp-p interface DS-25 - 4 - Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com Wires color code # Name Color Function 1 GND Black Ground 2 C/F Grey Coarse / Fine 3 Sine Blue Sine signal 4 Vr Green V reference 5 Cosine Yellow Cosine signal 6 +5V Red Power supply Output signal parameters Signal latency 250 μSec Fine-mode output noise (DC to 1kHz) 100 μV (p-p) Fine-mode output amplitude 0.5V ± 20% Coarse-mode output amplitude 0.5V ± 20% Phase relationship (CW shaft rotation - seen from top) Sine leads Cosine Signal bandwidth DC to 1 kHz Coarse and Fine channels The DS-25 has two operation modes: a Coarse-mode and a Fine-mode - equivalent to two separate encoders in a common housing. The modes are selectable by a logic C/F command; logic “0” (0V to +0.5V) selects the Coarse-mode, which has 3 Electrical Cycle/Revolution (EC/R) while logic ”1” (+3V to +5V) selects the Fine-mode which has 16 EC/R. The switching time is less than 1 ms. The Coarse-mode outputs need to be read only upon system initiation after which the encoder is permanently switched to the Fine mode. Coarse and Fine sine/ cosine pairs are used to calculate the initial absolute position, from that point tracking the Fine-channel outputs provides the absolute mechanical rotation angle with the specified accuracy and resolution. All output signals are referenced to an internally generated voltage Vr (~2.25V) Absolute Position calculation: The analog Sine /Cosine outputs convey the electric angle of the Coarse or Fine signals. The absolute mechanical angle is computed by digitizing the analog signals and applying factory-supplied algorithms. Please refer to AN-02 and AN-03 .
- 5. - 5 - DS-25 DS Product line OD mm Outputs: D - Digital : SSi (external module) C - AqB +I (external module) 0 - Analog - n n n Sold & Serviced By: Interconnection: 0 - Loose wires 250 mm S - Shielded cable C -Capsulated external module Resolution Binary Code Bit CPR D 15 32,768 E 16 65,536 F 17 131,072 DS - 25 - 16 - D- - S Fine EC/R F 0 0 - flying leads C- connector Analog Code 0 Ordering ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
- 6. Sold & Serviced By: 250 mm 250 mm - 6 - Interconnection options DS-25 SC2SSi external module 250 mm 250 mm SC2SSi external capsulated module 250 mm AWG30 shielded cable 250 mm AWG30 shielded cable AWG32 Teflon isolated AWG30 shielded cable AWG30 shielded cable AWG30 shielded cable Digital SSi Analog 30 AWG twisted pairs (3) Braided shield Jacket 0.45mm Ø 3.45 ± 0.20 Netzer Cat No.: CB00014 , 30 AWG twisted pair (3) : 2 (30 AWG 25/44 tinned copper , 0.15 PFE to Ø0.6 ± 0.05 ). Cable: Three 30 AWG twisted pairs. Shield: Tinned copper braided 95% min. coverage. Jacket:0.45 silicon rubber to Ø3.45 ±0.2 Pair # Color 1 2 3 Red / Black Gray / Blue Green / Yellow ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
- 7. - 7 - Sold & Serviced By: ENCODER BOTTOM VIEW The information contaned in this drawing is the sole property ot Netzer Precision Motion Sensores Ltd. Any reproduction in part or whole without the written permission of Netzer Precision Motion Sensors Ltd.is prohibited. The drawing is confidential,and is the property of Netzer Precision Ltd. it must not be disclosed to a third party without written consent of Netzer Precision Ltd Coating: Revision : A C D E F A 0.05 0.02 8 7 1 2 3 4 B 1 2 3 5 C D 4 6 7 8 A B TITLE: MATERIAL: 01 CAT NO. : . SIGNATURE VADIM.D JACOB N 14.03.13 DS-25 ICD SCALE: 1:1 A3 SHEET 1 OF 1 DWG NO. : NAME DATE DRAWN CHK'D APPV'D UNLESS OTHERWISE SPECIFIED: DIMENSIONS ARE IN mm SURFACE FINISH: N6 LINEAR TOLERANCES: 0.1 mm ANGULAR TOLERANCES: 0.5 deg ALL CHAMFER: 0.1 mm X 45° 14.03.13 3 6 ++ 0.06 0.04 A 3 SLOTS FOR ENCODER CLAMP EQ.SP ENCODER TOP VIEW SECTION A-A SCALE 5 : 1 MAUNTIG SURFACE 0.70 5.60 1.50 - + 25 8 +0.30 7 0 1 ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
- 8. - 8 - Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com