LA11 absolute magnetic encoder system

LA11 absolute magnetic encoder system

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LA11 is an absolute magnetic linear encoder system designed for motion control applications as a position and velocity control loop feedback element. The encoder system is highly reliable due to contactless absolute measuring principle, built-in safety algorithms and high quality materials/components used.

 

The measuring standard is a magnetic scale which consists of a stainless steel substrate with an elasto-ferrite layer. The elasto-ferrite layer is magnetised with two tracks. The incremental track is magnetised with 2 mm long (alternating south and north) poles and the absolute track is magnetised with a pseudo random binary sequence (PRBS) absolute code with 13 bit length. The elasto-ferrite layer is immune to chemicals commonly found in industry.

 

The readhead includes Hall sensor arrays for PRBS track reading, an AMR sensor for incremental track reading, interpolation electronics and custom logic circuitry. The data from the Hall arrays and interpolator are processed in the internal MCU using special algorithms to determine the absolute position.

 

The electronics design provides short response and recovery times. Diagnostic information is available through a serial communication channel and status LED.

All output types
Incremental pole length 2 mm
Maximum scale measuring length 16.3 m
System accuracy ±40 μm/m
Short range accuracy < ±10 μm/10 mm
Hysteresis < 2 µm at 0.1 mm ride height 
Repeatability Unit of resolution
Available resolutions

~0.244

~0.488

~0.976

~1.953

~3.906

~7.812

15.625

31.25

62.5

125

1.82

3.65

7

7

7

7

7

7

7

7

Maximum traverse velocity
Maximum speed for parallel incremental signals

Ordering code

Resolution

(µm)

Interpolation factor

Maximum speed

(m/s)

13B

~0.244

8,192

1.82

0.91

0.23

0.11

0.06

0.03

0.02

0.01

0.01

12B

~0.488

4,096

3.65

1.82

0.46

0.23

0.12

0.06

0.05

0.02

0.01

11B

~0.976

2,048

7

3.65

0.91

0.46

0.24

0.12

0.10

0.05

0.02

10B

~1.953

1,024

7

7

1.82

0.91

0.48

0.24

0.19

0.10

0.05

09B

~3.906

512

7

7

3.65

1.82

0.95

0.49

0.38

0.19

0.10

08B

~7.812

256

7

7

7

3.65

1.90

0.97

0.77

0.39

0.19

07B

15.625

128

7

7

7

7

3.81

1.94

1.53

0.77

0.39

06B

31.25

64

7

7

7

7

7

3.89

3.07

1.55

0.78

05B

62.5

32

7

7

7

7

7

7

6.14

3.10

1.56

04B

125

16

7

7

7

7

7

7

7

6.19

3.11

Edge separation (μs)

0.07

0.12

0.50

1

2

4

5

10

20

Minimum count frequency (MHz)

15

8

2

1

0.5

0.25

0.2

0.1

0.05

Ordering code

K

A

B

C

D

E

F

G

H

All output types
Power supply 5 V ± 5 % (voltage on readhead) and from 8 V to 30 V
Consider voltage drop over cable
Reverse polarity protection Only for 5 V
Set-up time after switch-on < 350 ms
Power consumption (without load) < 170 mA at 5 V power supply
Voltage drop over cable ~ 80 mV/m - without load
All output types
Mass Readhead (with 1 m cable, no connector) 41 g, magnetic scale 60 g/m
Cable PUR high flexible cable, drag-chain compatible, double-shielded. 
Durability: 20 million cycles at 20 mm bend radius at whole temperature range
All output types
Temperature
Operating 0 °C to +55 °C
Storage -20 °C to +85 °C
Vibrations (55 Hz to 2000 Hz) 300 m/s2 (IEC 60068-2-6)
Shocks (11 ms) 300 m/s2 (IEC 60068-2-27)
Humidity 100 % (condensation permitted)
EMC Immunity IEC 61000-6-2 (particularly: ESD: IEC 61000-4-2; EM fields: IEC 61000-4-3;
Burst: IEC 61000-4-4; Surge: IEC 61000-4-5; Conducted disturbances: IEC 61000-4-6;
Power frequency magnetic fields: IEC 61000-4-8; Pulse magnetic fields: IEC 61000-4-9)
EMC Emission IEC 61000-6-4 (for industrial, scientific and medical equipment: IEC 55011)
Environmental sealing IP68 (according to IEC 60529)

Features

  • True absolute system
  • Suitable for highly dynamic control loops
  • Small footprint
  • High accuracy
  • Resolutions up to 0.244 µm
  • Axis lengths up to 16.3 m
  • Speeds up to 7 m/s at 0.977 µm resolution 
  • Integral status LED
  • Synchronous (SSI, SPI, BiSS) communication protocols available 
  • Parallel incremental output (analogue or digital)
  • Double shielded, drag-chain compatible cable
  • Simple and fast installation
  • Robust measuring principle
  • Excellent degree of protection to IP68

Buy products by choosing the specifications

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Delivery time up to: 21 days

Total price:

$13.67

Availability: In stock

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