IT3402C Triple Channel Rotary Encoder Kit
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IT3402C Triple Channel Rotary Encoder Kit 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 (total < 2 mm) • Optional with cable, connector and holder Applications • Brushed and brushless motors • Industrial / laboratory / office automation • Rotary stages • Robotics, assembly equipment Key Specifications Description The IT3402C incremental encoder kit consists of an encoder and a codewheel (Fig. 1). The encoder consists of two integrated circuits in a PCB housing. It provides incremental A and B output signals in quadrature and an Index signal, which is synchronous to A and B (Fig. 2). The codewheel is a PCB with passive copper strips. Resolution, maximum speed and airgap The resolution and the maximum speed of the encoder are user-programmable or can be programmed ex-factory. The resolution depends on a filter setting that limits the maximum speed of the encoder vs. the codewheel. The resolution also depends on the maximum distance between the encoder and the codewheel. Tables 2 and 3 allow the configuration of resolution and maximum speed for a certain maximum air-gap. Codewheel The codewheel is shown in Fig. 4 and is selected in Table 5. The codewheel may be mounted on a hub, using a rim for accurate positioning in front of the encoder. Encoder holders Different encoder holder options are available and can be selected in Table 6. The encoder holder type A (Fig. 5) may be mounted on any substrate using 4 screw-holes. It has a strain relief for the cable. The encoder holder type B (Fig. 3) may be mounted on any substrate. Use half-holes on encoder PCB housing and alignment pins for accurate positioning. The encoder without holder may be mounted on non-metallic substrates. Use half-holes on encoder housing and alignment pins for accurate positioning. Encoder cable and connector The encoder is supplied with a flat cable of pitch 1.27 mm and a connector (Fig. 6). The cable type and length and the connector type are selected in Tables 7 and 8. 3D models of encoder, holders and codewheels STEP and IGES 3D models available on www.posic.com.

Specifications Recommended Operating Conditions Linearity For high-resolution high-precision applications, it is possible to linearize the encoder by means of a Look-Up Table (LUT) that is located inside the encoder. The LUT can be programmed in volatile or in non-volatile memory by means of the Evaluation and Programming Tool (EPT) or it can be pre-programmed ex-factory. The LUT option is selected in Table 4. Definitions Airgap Cycle CPP °e Phase shift O Fig. 2 Encoder output signals A and B in quadrature and Index. Distance between encoder and codewheel in Z-direction. See Fig. 1. One A...

Dimensions of IT3402 encoder on encoder-holder type B. The “Encoder center” must be centered with respect to the “Readout radius” of the Codewheel (Fig 4) Codewheel type * Readout Radius = position of Encoder Center (Fig. 3) Codewheel thickness 0.73 mm +/- 10%

BB Maximum speed Table 2 D Look-Up Table Table 4 EEEEE Codewheel Table 5 F Encoder holder Table 6 Table 1: Orientation. Arrows indicate direction of move ment of codewheel with rising edge A prior to B. Table 2: Maximum speed *Max speed valid at 25°C, temp. derating in specs, page 2. Lower Max speed leads to a lower jitter of the A/B outputs. * Connector temperature range -20 to +100°C © Copyright 2019 POSIC. All rights reserved. No part of this document may be reproduced without the prior written consent of POSIC. Products and companies mentioned in this document may be trademarks or...