it3401c-codeur-rotatif

8/12/2019 IT3401C-Codeur-Rotatif

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IT3401C

Triple Channel

Rotary Encoder Kit

IT3401C-DS-V2A Page 1 of 4 www.posic.com

Product data

Features

Highly miniaturized encoder

Differential inductive sensing principle Insensitive to magnetic interference fields Robust against oil, water, dust, particles Ultra-thin encoder and codewheel (each 0.9 mm)

Optional with cable, connector and holder

Applications

Brushed and brushless motors Industrial / laboratory / office automation Rotary stages

Robotics, assembly equipment High-speed motion control Mechatronics applications

Key Specifications

Output format .................... A and B in quadrature + Index

Resolution ......................... 10 14 bit, 256 4096 CPR

Maximum speed ............... up to 10000 RPM

Airgap ............................... up to 0.5 mm

Supply ............................... 5 V, 25 mATemperature ..................... 0 100C

Description

The IT3401C incremental encoder kit consists of anencoder and a codewheel (Fig. 1). The encoder is anintegrated circuit in a PCB housing. It provides incrementalA and B output signals in quadrature and an Index pulse(Fig. 2). The codewheel is a PCB with passive copperstrips. Table 1 defines the orientation of encoder vs.codewheel.

Resolution, maximum speed and airgap

The resolution and the maximum speed of the encoder areprogrammed ex-factory. The resolution depends on a filtersetting that limits the maximum speed of the encoder vs.codewheel. The resolution also depends on the maximumdistance between the encoder and the codewheel. Tables2 and 3 allow the configuration of resolution and maximumspeed for a certain maximum air-gap.

CodewheelThe codewheel is shown in Fig. 4 and is selected in Table4. The codewheel may be mounted on a hub, using a rimfor accurate positioning in front of the encoder.

Metallic or non-metallic hub

Alignment rim

Codewheel

Shaft

Encoder holdersDifferent encoder holder options are available and can beselected in Table 6.The encoder holder type A0 (Fig. 5) may be mounted onany substrate using 4 screw-holes. It has a strain relief forthe cable.

EncoderCable

Metallic or non-metallic substrate

Encoder-holder type A0

The encoder holder type B0 (Fig. 3) may be mounted onany substrate. Use half-holes on encoder PCB housing andalignment pins for accurate positioning.

EncoderCable

Metallic or non-metallic substrate

Encoder-Holder type B0

The encoder without holder may be mounted on non-metallic substrates. Use half-holes on encoder housing andalignment pins for accurate positioning.

EncoderCable

Non-metallic substrate Encoder cable and connectorThe encoder is supplied with a flat cable of pitch 1.27 mmand a connector (Fig. 6). The cable length and theconnector type are selected in Tables 6 and 7.

3D models of encoder, holders and codewheelSTEP and IGES 3D models available on www.posic.com.


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IT3401C


Specifications

Recommended Operating Conditions

Parameter Symbol Remark Min Typ Max Unit

Supply voltage VDD 4.5 5.0 5.5 V

Operating Temperature TA 0 100 C

Operating frequency F See Table 3 200 kHz

Airgap Z 0.2 mm

Radial play + eccentricity Y 0.1 mm

Axial play Z 0.1 mm

Electrical Characteristics

Electrical characteristics over recommended operating conditions, typical values at VDD = 5.0 V, TA= 25C.


Supply current IDD No load 15 25 35 mA

High level output voltage VOH IL= 2 mA VDD0.5 V

Low level output voltage VOL IL= 2 mA 0.5 V

Rise time tr CL= 47 pF 20 ns

Fall time tf CL= 47 pF 20 ns

Encoding Characteristics

Encoding characteristics over recommended operating conditions, typical values at VDD = 5.0 V, TA= 25C, airgap = 0.2 mm,speed = 10 RPM.


Pulse width error P Nominal value 180e 10 50 e

State width error S Nominal value 90e 10 60 e

Phase shift error Nominal value 90e 10 45 e

Position error Y = 0 mm 0.15 0.7 m

A

B

C = Cycle = 360e

P = Pulse width= Phase

S1 S = State widthS2 S3 S4

I

Fig. 1 Coordinate system of encoder. Fig. 2 Encoder output signals A quad B and Index.

X

Y

Z


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IT3401C


Technical drawings

Fig. 3 Dimensions of IT3401 encoder on encoder-holder type B0. The two Sensor centers must be centered with respect to the two trackson the codewheel with readout radius 12.2 mm and 8.5 mm (Fig 4)

Fig. 4 Codewheel with outer diameter 28.2 mm. Fig. 5 Encoder Holder type A0 (see Table 5).

1

1

9

2

10

300 mm

8

Connector pin Name Description

1 VDD 5V Supply

2 VSS Ground

3 A1 Not used

4 B1 Not used

5 I1 Not used

6 A2 Output A

7 B2 Output B

8 I2 Output Index

9 NC Not Connected

10 NC Not Connected

Fig. 6 Encoder with flat cable (pitch 1.27 mm) and 10-pin DIN41651 connector.

Encoder

Encoder-holder

type B0

Cable length


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IT3401C


Ordering information

Ordering code: IT3401C-ABBCC-DDDD-EEEE-FFA Orientation Table 1BB Maximum speed Table 2CC Resolution Table 3DDDD Codewheel Table 4EEEE Encoder holder and cable Table 5FF Connector Table 6

Table 1: Orientation (see Fig. 4)

A Orientation Direction of rotation DIR

0 0 Rising edge A prior to B

Table 2: Maximum speed

BB Max speed (RPM)Max value of CCallowed for this

setting of max speed

00 10 0801 20 08

02 39 08

03 78 08

04 156 08

05 313 08

06 625 08

07 1250 08

08 2500 08

09 5000 07

10 10000 06

Lower Max speed leads to a lower jitter of the A/B outputs.

Table 3: Resolution

CC

Resolution Maxallowedvalue of

BB

Max countingAirgap* (mm)Bits CPR

04 10 256 10 0.5

05 11 512 10 0.4

06 12 1024 10 0.4

07 13 2048 09 0.3

08 14 4096 08 0.3

* Encoder is calibrated at airgap = 0.2 mm, which isrecommended as nominal value. Sequence of A and Btransitions is correct up to Max counting Airgap, butencoding specifications may be out of range.

Table 4: Codewheel

DDDD Codewheel

0106 64 periods, 28.2 mm , see Fig. 4

Other codewheels available upon request

Table 5: Encoder holder and cable

EEEE Encoder holder and cable

00xx No holder, xx cm flat cable

A0xx Holder type A0 (Fig. 5) and xx cm flat cable

B0xx Holder type B0 (Fig. 3) and xx cm flat cable

Other encoder holders and cables available upon request.

Table 6: Connector

FF Connector

02 10-pin connector DIN 41651

03 14-pin connector DIN 41651

Other connectors available upon request.

Definitions

Airgap Distance between encoder and scale in Z-direction. See Fig. 1.

Count See Cycle.

Cycle One A quad B period, see Fig. 2.

CPR Cycles/Counts per Revolution.

DIR Direction of rotation of the codewheel whenthe side with the stripes is observed.

e Electrical degree (one Cycle is 360e)m Mechanical degree (one codewheel

revolution is 360m)

Phase shift Number of electrical degrees between thecenter of the high state of channel A andthe center of the high state of channel B.Nominal values is 90e. See Fig. 2.

Pulse width P Number of electrical degrees that an outputis high during one cycle. Nominal value is180e. See Fig. 2.

RPM Revolutions Per Minute (of the codewheel).

State width S Number of electrical degrees between two

neighboring A and B transitions. Nominalvalue is 90e. See Fig 2.

Copyright 2013 POSIC. All rights reserved.No part of this document may be reproduced without the prior written consent of POSIC. Productsand companies mentioned in this document may be trademarks or registered trademarks of their respective owners.

Information in this document is believed to be accurate and reliable and may be changed without notice. No responsibility is assumed by POSICfor its use, nor for infringements of patents or other rights of third parties which may result from its use. Some commercial or geographicalrestrictions may apply to the sale of this product. No license is granted by implication or otherwise under any patent or patent rights of POSIC. Inno event shall POSIC, its employees, its contractors, or the authors of this document be liable for special, direct, indirect, or consequentialdamage, losses, costs, charges, claims, demands, claim for lost profits, fees, or expenses of any nature or kind.

POSIC products are not designed, intended, authorized or warranted to be suitable for use in life-support applications, devices or systems or

other critical care applications. Inclusion of POSIC products in such applications is understood to be undertaken solely at the customers ownrisk. Should a customer purchase or use POSIC products for any such unauthorized application, the customer shall indemnify and hold POSICand its officers, employees, subsidiaries, affiliates, representatives and distributors harmless against all claims, costs, damages and attorneyfees which could arise.

it3401c-codeur-rotatif

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