AME13S19015CWS1HT02250115W datasheet, PDF

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AME13S19015CWS1HT02250115W: DescriptionOptical Position Encoder,; CategoryLED optoelectronic/LED photoelectric; File Size406KB，5 Pages; ManufacturerEXXELIA Group; Environmental Compliance

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AME13S19015CWS1HT02250115W Overview

Optical Position Encoder,

AME13S19015CWS1HT02250115W Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Objectid	145117212672
Reach Compliance Code	unknown

AME13S19015CWS1HT02250115W Preview

ELECTROMECHANICAL SOLUTIONS

AME13

Magnetic

Technology

SINGLE TURN

ABSOLUTE MAGNETIC ENCODER

PRESENTATION

The absolute encoder

AME13

is a rotary sensor based on

magnetic technology. Low profile configuration and high

accuracy make it very useful in applications which need axial

access: actuators, electromechanical aerospace devices ...

Various output protocols are available in order to match most

applications

High temperature

up to +125°C

Shocks/Vibrations

resist

SSI / FSSI

interface

High

performances

Low profile

GENERAL DATA

Resolution

Accuracy

Maximum rotation speed

Weight (without cable)

Up to 19 bits

Up to ± 1.5’

2000 rpm

30 g max.

ENVIRONMENTAL DATA

Operating temperature

Storage temperature

Sealing

Vibrations

Shocks

Magnetic field susceptibility

For other specifications, please contact us

Up to –55°C to +125°C

–55°C to +125°C

IP 40

20 g, 1.5 mm, 10 Hz to 2 kHz

50 g, ½ sine, 11 ms.

20 mT max.

DIMENSIONS (in mm)

Flange mounting (F)

11.5

±0.5

5.1

2 x Ø 2.2

Ø 5.5

Ø 39

Encoder

body

Shaft

Ø 3 h8

–0.018

Ø 32 h7

–0.025

Ø 10 max.

Ø 33.3

±0.3

2.5 on flat

1.5

±0.2

1.2

±0.2

1.5

±0.2

Shielded / Jacketed

6 x AWG32 wires

Length

Servo mounting (S)

1.5

±0.2

Optional flanges

www.exxelia.com • info@exxelia.com

Tel : + 33 (0)1 49 23 10 00

Page revised - Version 05/19

ELECTROMECHANICAL SOLUTIONS

SINGLE TURN

ABSOLUTE MAGNETIC ENCODER

STANDARD ELECTRICAL DATA

Power supply

Maximum consumed current

Output signals

Maximum operating frequency

For other speciﬁcations, please contact us

AME13

+5 V

± 5%

100 mA

RS422/485

2 MHz (SSI) / 4 MHz (FSSI)

CONTACTLESS POSITION SENSORS

•••

115

TBD

•

RoHS compliant

Page revised - Version 05/16

ELECTRICAL INTERFACE

RS422/485 Interface

User

Encoder

150

Wiring diagram

Red

Encoder output

Clock

Black

Yellow

White

Blue

Green

GND

CLK

DATA

150

Data

HOW TO ORDER

Mounting Resolution Accuracy

AME13

•

••

•••

150

075

015

Direction

of signals

••

Protocol

••

Temperature

range

••

Mechanical Wire length Shaft length RoHS

coupling

(Lw)

(Ls)

compliance

••

•••

250

TBD

Flange

Servo

bits

150:

±15’

Standard

CW:

Clockwise

with coupling

075:

±7.5’

015:

±1.5’

KW:

Counter

clockwise

ST:

Standard temp.

–40°C to +85°C

S1:

SSI

FS:

FSSI

Standard

SSI2

compatible

MT:

Medium temp.

–45°C to +105°C

HT:

High Temp.

–55°C to +115°C

XT:

Extended Temp.

–55°C to +125°C

01:

Without coupling

02:

Standard coupling

03:

Custom coupling

250:

250 mm

Standard

115:

11.5 mm

Standard

TBD:

To Be Deﬁned To Be Deﬁned Non compliant

by the

customer

1: Please refer to «Encoder Handbook» available on

EXXELIA

GROUP

website.

2: For further information, please contact us.

www.exxelia.com • info@exxelia.com

Tel : + 33 (0)1 49 23 10 00

Contactless Position Sensors general information

1. INTRODUCING EXXELIA

GROUP

ENCODERS

Encoders are sensors that generate digital signals in response

to movement. Encoders come with two outlines: rotary and

linear

. Both types sense mechanical motion and translate the

information (velocity, position, acceleration) into useful data.

A contactless technology

To address demands for longer service life and with its

strong track record in contact technology position sensors

(potentiometers), Electromechanical Solutions SBU has been

developing own-brand contactless sensors for nearly 10 years.

These sensors are absolute and incremental optical encoders,

magnetic technology and inductive sensors.

Absolute optical or magnetic encoders: absolute optical

encoders are position sensors that use optical signals to

identify an absolute angular position. The

EXXELIA

GROUP

encoders offer very high performance levels for a very small

footprint:

• high precision (<30 arcsec),

• high resolution (up to 21 bits),

• highly thin (10mm),

• EMI EMC compatibility

Incremental optical or magnetic encoders: absolute optical

encoders are position sensors that use optical signals to

identify an absolute angular position. Incremental encoders

have to be initialized by a ﬁrst turn to produce an absolute

position.

Applications:

Aeronautics, Defense, Railway, Medical, Oil

exploration, Telecommunications

EXXELIA

GROUP

encoders can also be easily combined with other

functions like Slip rings or rotary joints (FORJ, HF...) in complete

proprietary systems.

conveys or alternatively blocks the light emitted by the source;

the scale or the disk is acts in fact as a beam switch. The photo-

receiver generates an electrical signal, which is processed and

analyzed in order to allow encoding the system position.

An optical encoder consists of three major subsets:

• Encoder housing.

• Optical block: consisting of an emission system, an

optical coding system and a detection system. It

generates the position function signal.

• Electronics block: it allows amplifying, converting and

processing the signal.

Photo-emitter

Optical disk

Reticles

Photo-receivers

Figure 1: Incremental principle

Photo-receivers

Reticles

2. SENSING TECHNOLOGY

Encoders can use either optical or magnetic sensing

technology.

Optical sensing provides high resolutions, high operating

speeds, and reliability, long life operation in most environments.

Magnetic sensing, often used in rugged applications provides

good resolution, high operating speeds, and maximum

resistance to dust, moisture, and thermal and mechanical

shock.

Optical Encoders: principles

Optical encoders’ principle of operation is relatively simple; a

light source (photo-emitter) sends light through a mobile disk

or scale, consisting of a succession of opaque and transparent

parts, on photo-receivers. When the disk or the scale moves, it

Coding disk

Photo-emitters

Figure 2: Absolute principle

www.exxelia.com • info@exxelia.com

Tel : + 33 (0)1 49 23 10 00

Page revised - Version 05/16

GENERAL TECHNICAL DATA

ELECTROMECHANICAL SOLUTIONS

ELECTROMECHANICAL SOLUTIONS

Contactless Position Sensors general information

Optical encoders use a glass disk with a pattern of lines

deposited on it, a metal or plastic disk with slots (in a rotary

encoder), or a glass or metal strip (in a

linear

encoder). Light

from a LED shines through the disk or strip onto one or more

photodetectors, which produce the encoder’s output.

industrial environments, as well to shock and vibrations.

Photo-emitters

Linear coding scale

Fig. 4a

Fig. 4b

Figure 4: Magnetic Sensor principles:

a) On axis technology with a bipolar magnet

b) odd axis technology with a multipolar ring

Reticles

4. ABSOLUTE OR INCREMENTAL CODING?

INCREMENTAL CODING

Photo-receivers

Figure 3: Linear principle

Incremental encoders provide a speciﬁc number of equally

spaced pulses per revolution (PPR) or per inch or millimeter of

linear motion.

3. MAGNETIC ENCODERS: PRINCIPLES

The position sensors which use the detection of a magnetic

ﬁeld generally work following the same principle:

A magnetic ﬁeld is generated thanks to a permanent magnet or

an electromagnet. The distribution in the space of this magnetic

ﬁeld is not homogeneous. Depending on the relative positions

of the magnetic source, the sensors cells and a possible

ferromagnetic third element, the magnitude of the ﬁeld will be

different. The measured value is then analysed as a function

of the speciﬁc geometry in order to recover the information of

position.

Among magnetic encoders we can distinguish several

technologies which are using this principle to convert magnetic

ﬁeld into a physical quantity useful in electronic devices

(typically current or tension). The most common are inductive

encoder, magneto-resistive encoder and Hall effect encoder.

Magnetic encoders are typically robust and non-sensitive to

environmental stress like shocks, vibrations, and chemical

substances. In order to protect the measurement against a

variation of the external magnetic ﬁeld (especially next to

motors), it is possible to add a magnetic shielding with speciﬁc

materials and to carry out differential measurements.

Magnetic encoders constitute miniature long-life cost-effective

sensors. Magnetic sensing technology is very resistant to

dust, grease, moisture, and other contaminants common in

Figure 5: A and B quadrature signals

For applications that do not require detection sensing, a single

channel output is used. But in most cases, two channels A

and B, 90 electrical degrees out of phase are used. Those two

channels allow a detection of the direction of motion (See

Figure 6). This is useful for processes that can reverse, or must

maintain steady position when standing still or mechanically

oscillating.

CCW

Figure 6: Determination of the direction of movement

The quantity of positions that can be detected depends on

electronic processing from channels A and B (see Figure 7). In

the case the disk has N periods or “bars”:

If processing system only detects leading (or trailing) edges of

channel A (or B), then the resolution is equal to the number N.

www.exxelia.com • info@exxelia.com

Tel : + 33 (0)1 49 23 10 00

Page revised - Version 05/16

Contactless Position Sensors general information

If the system detects leading and trailing edges of channel A

(or B), or if it detects leading or trailing edges of channels A and

B, then the resolution is equal to 2N.

If processing system detects leading and trailing edges of the

channels A and B, then the resolution is 4N.

In some conﬁgurations, it is even possible to electronically

interpolate more precisely this signal and achieve up to 50N

resolution.

To determine a position, incremental encoders need an

initialization step that is a lap or a movement to ﬁnd the “zero”

reference or home position. After this step, each pulse will be

accumulated into a counter. In case of a power interruption or

corruption by electrical transients, the count is lost and the

initialization step should be done again.

Signal A only

Signal A + B

“zeroing” (seekers, ﬂight commands, radar mechanics...).

How to easily understand the difference between

incremental and absolute encoders?

A well-known image is that the difference between

incremental and absolute encoders is similar to the

difference between a stop watch and a clock. A stop watch

measures the incremental time that elapses between its

start and stop, just like an incremental encoder will provide

a known number of pulses relative to a movement. If you

knew the actual time when you started the watch, you can

tell what time it is later by adding the elapsed time value

from the stop watch. For position control, adding incremental

pulses to a known starting position will measure the current

position. When an absolute encoder is used, the actual

position will constantly be transmitted, just as a clock will

tell you the current time.

5. SSI / FSSI

SSI is a synchronous, point to point, serial communication

channel for digital data transmission. Synchronous data

transmission is one in which the data is transmitted by

synchronizing the transmission at the receiving and sending

ends using a common clock signal. Since start and stop bits

are not present, this allows a better use of data transmission

bandwidth for more message bits and makes the whole

transmission process simpler and easier. The clock needs its

own bandwidth and should be included when determining the

total bandwidth required for communication between the two

devices.

In general, as mentioned earlier, it is a point to point connection

from a master (Microcontroller) to a slave (rotary encoders).

The master controls the clock sequence and the slave transmits

the current data/value through a shift register. When invoked

by the master, the data is clocked out from the shift register.

The master and slave are synchronized by the common clock

of the controller.

The CLOCK and DATA signals are transmitted according to RS-

422 standards. RS-422, also known as ANSI/TIA/EIA-422-B, is a

technical standard that speciﬁes the electrical characteristics

of the balanced voltage digital interface circuit. Data are

transmitted using balanced or differential signaling and the

CLOCK and DATA lines are basically twisted pair cables.

FSSI is the same synchronous interface but includes a start bit

and is more ﬂexible for other options (Alarm bit, ID encoder....).

The maximum bandwidth is 4 MHz.



Resolution = N



Resolution = 2N



Resolution = 4N

Figure 7: Resolution of incremental encoders

This “zero” or home position may be output as a signal known

as the “marker,” “index,” or “Z channel.”

Incremental encoders are principally used in applications

where relative movement is required, such as machine or

process control, robotics...

ABSOLUTE CODING

Absolute coding is basically different than incremental coding.

Every position of an absolute encoder is unique. Unlike

an incremental encoder, where position is determined by

counting pulses from a zero mark or home base, the absolute

encoder reads a system of coded tracks to establish position

information.

Absolute encoders do not lose position when power is removed.

Since each position is unique, true position veriﬁcation is

available as soon as power is up. It is not necessary to initialize

the system by returning to home base.

An absolute encoder’s resolution is deﬁned as the number of

bits in its output word. This output can be in natural binary or

in gray code, which produces only a single bit change at each

step to reduce errors.

Absolute encoders will be used when the measurement is

critical and the application cannot afford an initializing step for

www.exxelia.com • info@exxelia.com

Tel : + 33 (0)1 49 23 10 00

Page revised - Version 05/16

GENERAL TECHNICAL DATA

ELECTROMECHANICAL SOLUTIONS

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