RLC2IC component magnetic encoder with magnetic rings MR050C and MR047B

Transcription

1 Issue 1, 29 th September 2014 RLC2IC component magnetic encoder with magnetic rings MR050C and MR047B RLC is a PCB level encoder for rotary measurements. With its compact design it is suitable for integration into embedded motion control systems where limited space for encoder is available. The information carrier is a magnetic ring (MR) with a pole length of 2 mm. State-of-the-art position sensing assures highly repeatable position measurement under wide installation tolerances and temperature range. Integrated interpolator allows interpolation up to 13 bits of measuring steps per pole length. dvanced production methods assure minimisation of interpolation error (SDE) to less than 0.2 % of pole length. Position information is output in incremental quadrature format with periodic index impulses. Index periods correspond to pole length of magnetisation. Time between two neighbouring edges of incremental output signals is definible with ordering code and allows optimal adaptation of the measuring system to sub-sequent electronics. Chosen edge separation and resolution provides maximum measuring velocities. t 1 μm resolution and 0.12 μs edge separation this is more than 4 m/s. EM compatibility of RLC should be assured with enclosure system and external components. Miniature dimensions Incremental quadrature differential output signals, B, Z according to RS422 Periodic, bidirectional index impulse Resolution from µm for linear High speed operation Cable connection RoHS compliant associate company

2 RLC dimensions Sensor area increm. side 2 ± Max. 1 Sensor area ref. side 7.5 Front side Ø0.9 4 ± ±0.2 Connections +5 V Z+ Front side Z- B+ B V ±0.3 Sensor area increm. side Back side Sensor area ref. side 10.3 Mount area Back side 0 V - + B- B+ Z- Z+ +5 V ± ± ± ± Mount area RS422 driver RLC installation drawing xial ring application Radial ring application ± ± ± ±0.1 R0.3 2

3 RLC technical specifications System data Pole length vailable interpolations, resolutions and maximum speed 2 mm Unidirectional repeatability < 2 µm Hysteresis Sub divisional error ±3.5 µm Electrical data Power supply Power consumption (without load) Output signals ESD susceptibility of all pins Mechanical data Mass Moment of inertia Environmental conditions Temperature See tables on page 4. < 2 µm up to 0.2 mm ride height 5 V ±0.25 V < 35 m Digital RS422 (+, B+, Z+, -, B-, Z-) High level output voltage (I OH = -20 m) Low level output voltage (I OL = 20 m) Rise and fall time (c c = 50 pf) 2 kv (HBM 100 pf, discharge through 1.5 kω) RLC: 1.25 g; MR050C: 8 g; MR047B: 9 g MR050C 3,880 g/mm 2 MR047B 4,205 g/mm 2 Operating and storage Vibrations (55 Hz to 2000 Hz) 300 m/s 2 (IEC ) Shocks (11 ms) 300 m/s 2 (IEC ) -40 C to +125 C > 2.4 V < 0.4 V < 10 ns Timing diagram Inverted signals not shown. Edge separation (µs) Resolution (µm) B Z associate company 3

4 Maximum speed and resolution for MR050C xial ring, 72 poles (2 mm pole length) Resolution (cpr) factor Maximum speed (revolutions per minute) 589,824 8, ,912 4, ,456 2,048 1, ,000 2,000 1, ,200 1,600 2, ,728 1,024 3, ,000 1,000 3, , ,333 1, , ,767 1, , ,933 1, , ,667 2,167 1, , ,833 2,707 1, , ,540 3,380 1, , ,333 4,333 2,167 1, , ,833 2,707 1, , ,080 6,767 3,380 1, , ,333 4,333 2,167 1, , ,833 2,707 1, , ,558 13,540 6,767 3,220 1,647 2, ,833 2,707 1, , ,558 27,080 13,540 6,447 3,300 1, na 30,558 27,080 12,893 6, na 30,558 30,558 25,793 13,207 Edge separation (μs) Count frequency (khz) Maximum speed and resolution for MR047B Radial ring, 76 poles (2 mm pole length) Resolution (cpr) factor Maximum speed (revolutions per minute) 622,592 8, ,296 4, ,648 2,048 1, ,000 2,000 1, ,600 1,600 2, ,824 1,024 3, ,000 1,000 3, , ,105 1, , ,411 1, , ,568 1, , ,211 2,053 1, , ,263 2,564 1, , ,827 3,202 1, , ,421 4,105 2, , ,263 2,564 1, , ,655 6,411 3,202 1, , ,421 4,105 2, , ,263 2,564 1, , ,166 12,827 6,411 3,051 1,560 3, ,263 2,564 1, , ,166 25,655 12,827 6,107 3,126 1, na 32,166 25,655 12,215 6, na 32,166 32,166 24,436 12,512 Edge separation (μs) Count frequency (khz) associate company 4

5 RLC readhead part numbering RLC 2 IC 13B 00 C 00 Pole length 2-2 mm pole length Output type IC - Incremental RS422 13B B B D D B D D B D D D B D D B D D B - 64 D B B B No special requirements (standard) Reference - With reference mark B - No reference mark C - Periodic reference mark as per scale pitch (every 2 mm) Minimum edge separation (Frequency) µs (8.3 MHz) B µs (2 MHz) C - 1 µs (1 MHz) D - 2 µs (0.5 MHz) E - 4 µs (0.25 MHz) Magnetic ring part numbering Radial ring 76 poles (2 mm pole length) MR 047 B 040 B 076 B ccuracy better than ±0.1 xial ring MR 050 C 040 B 092 B 00 Number of poles poles poles 00 - No special requirements 02 - With back-adhesion tape 07 - ccuracy better than ±0.1 Counts per revolution = No. of poles Contact us RLS Merilna tehnika d.o.o. Poslovna cona Žeje pri Komendi Pod vrbami 2 SI-1218 Komenda Slovenia T F E mail@rls.si 5