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Operating Manual
SI220
SinCos interpolator for encoders and measuring systems with SinCos output
Product features:
Converts 1 Vss standard sinus wave signals into incremental square wave signals
Outputs A, /A, B, /B, Z, /Z (RS422 / HTL)
Adjustable multiplier for interpolation rates from 1 : 5 ... 1 : 50
Adjustable divider 1 : 1 ... 1 : 255 to reduce the output frequency
Sine input frequency 0 ... 400 kHz
Quadrature output frequency up to 4 MHz
Adjustable glitch-filter
Power supply 18 ... 30 VDC
motrona GmbH, Zeppelinstraße 16, DE - 78244 Gottmadingen, Tel. +49 (0) 7731 9332-0, Fax +49 (0) 7731 9332-30, info@motrona.com, www.motrona.com
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Summary of Contents for Motrona SinCos SI220
- Page 1 Sine input frequency 0 … 400 kHz Quadrature output frequency up to 4 MHz Adjustable glitch-filter Power supply 18 … 30 VDC motrona GmbH, Zeppelinstraße 16, DE - 78244 Gottmadingen, Tel. +49 (0) 7731 9332-0, Fax +49 (0) 7731 9332-30, info@motrona.com, www.motrona.com...
- Page 2 First Version Legal notices: All contents included in this manual are protected by the terms of use and copyrights of motrona GmbH. Any reproduction, modification, usage or publication in other electronic and printed media as well as in the internet requires prior written authorization by motrona GmbH.
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Page 3: Table Of Contents
Table of Contents General Safety Instructions ..................4 Use according to the intended purpose ............... 4 Installation ........................5 EMC Guidelines ......................6 Cleaning, Maintenance and Service Notes ..............6 Connection Overview ....................11 SinCos-Inputs (X3) ...................... 12 RS422 Impulse Outputs (X2) ..................13 Control Input and Output (X1) .................. -
Page 4: General Safety Instructions
Safety Instructions and Responsibility General Safety Instructions This operation manual is a significant component of the unit and includes important rules and hints about the installation, function and usage. Non-observance can result in damage and/or impairment of the functions to the unit or the machine or even in injury to persons using the equipment! Please read the following instructions carefully before operating the device and observe all safety and warning instructions! Keep the manual for later use. -
Page 5: Installation
Installation The device is only allowed to be installed and operated within the permissible temperature range. Please ensure an adequate ventilation and avoid all direct contact between the device and hot or aggressive gases and liquids. Before installation or maintenance, the unit must be disconnected from all voltage-sources. Further it must be ensured that no danger can arise by touching the disconnected voltage- sources. -
Page 6: Emc Guidelines
EMC Guidelines All motrona units are designed to provide high protection against electromagnetic interference. Nevertheless, you must minimize the influence of electromagnetic noise to the unit and all connected cables. Therefore, the following measures are mandatory for a successful installation and operation: Use shielded cables for all signal and control input and output lines. - Page 7 Compatibility Hint The main differences between the SI220 and its previous model, the SI251, are listed below: SI220 SI251 Housing dimensions (w x h x d): dimensions (w x h x d): 34 x 118 x 135 mm / 40 x 79 x 91 mm / 1.34 x 4.65 x 5.31 inches 1.57 x 3.11 x 3.58 inches (inclusive connections)
- Page 8 Introduction SI220 represents an encoder interface unit, designed to convert output signals of so-called “sine-cosine-encoders” and similar measuring systems into incremental quadrature impulse signals, according to the A/B (2 x 90°) standard. Under consideration of an adjustable multiplier the unit interpolates a corresponding number of impulses from every sine wave.
- Page 9 Block Diagram Si220_01a_oi_e.docx / Nov-23 Page 9 / 22...
- Page 10 Connections The unit provides a 9-pin SUB-D connector (female on the unit site) for connection of the SinCos sensor. For easy power supply of the encoder, an auxiliary voltage of either 5.2 V or approx. 24 V can be connected to the SUB-D socket. The incremental output impulses are available with RS422 standard and HTL standard (push- pull) at the same time, and one output of both or both outputs at a time may be used, quite according to the application.
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Page 11: Connection Overview
Connection Overview At any time, the over-all transmission characteristics of encoder, external components and capacity of cable must ensure proper signals at the input of the unit, with respect to levels, shape and phase displacement A/B. The output swing of the HTL push-pull outputs corresponds to the input supply voltage on terminals 1 (GND) and 2 (+24V) of X1. -
Page 12: Sincos-Inputs (X3)
Pin assignment of SUB-D-connectors SinCos-Inputs (X3) Standard encoders with differential outputs can be connected directly to the corresponding pins SIN+, SIN-, COS+, COS-, REF+, REF-. Where longer cables must be used, terminating resistors between the non-inverted and the inverted signal of each channel may be of advantage. Using the DIL switch, the Z pulse can be switched on the input or a Z pulse is automatically generated with each sine period. -
Page 13: Rs422 Impulse Outputs (X2)
RS422 Impulse Outputs (X2) Control Input and Output (X1) Si220_01a_oi_e.docx / Nov-23 Page 13 / 22... - Page 14 Switch Settings DIL switch S1 is used to set the filter, the interpolation factor, the interpolation time and the programmable Z divider. DIL switch S2 allows the activation of a programmable A/B divider and the selection of test modes. Changes of the DIL switch positions will become active only after the next power-up of the unit! DIL switch Status...
- Page 15 DIL switch S1 Interpolation and Filtering Glitch filter ON Filtering OFF OFF OFF ON OFF OFF OFF ON OFF ON ON OFF Interpolation factor OFF OFF ON ON OFF ON OFF ON ON 12,5 ON ON ON 6,25 OFF OFF 25 ns OFF ON 100 ns...
- Page 16 The subsequent table shows the limits of input and output frequencies with respect to the DIL switch settings: Maximum output Maximum input Interpolation rate Interpolation time frequency frequency 25 ns 2 MHz 400 kHz 100 ns 2 MHz 400 kHz 400 ns 625 kHz 125 kHz...
- Page 17 Maximum output Maximum input Interpolation rate Interpolation time frequency frequency 25 ns 4 MHz 320 kHz 100 ns 2.5 MHz 200 kHz x12,5 400 ns 625 kHz 50 kHz 1600 ns 156.25 kHz 12.5 kHz 25 ns 4 MHz 200 kHz 100 ns 2.5 MHz 125 kHz...
- Page 18 Frequency Divider and Error Signals The programmable frequency divider provides decrease of the output frequency by an adjustable division rate between 1 : 1 and 1 : 255. The following errors are detected and indicated by the yellow LED and the Error output: ...
- Page 19 DIL switch S1: Z divider OFF OFF OFF OFF 1 : 1 OFF OFF OFF ON 1 : 2 OFF OFF ON OFF 1 : 3 OFF OFF ON ON 1 : 4 OFF ON OFF OFF 1 : 5 OFF ON OFF ON 1 : 6 OFF ON ON OFF...
- Page 20 Delays There is a delay time between the analogue input signals and the incremental output signals, which is typically 3 µsec. when the divider is switched off. Use of the divider function will extend the delay time correspondingly. The delay time is constant, and causes a frequency dependent phase shift between the input and output signals.
- Page 21 Dimensions Si220_01a_oi_e.docx / Nov-23 Page 21 / 22...
- Page 22 Technical Specifications Technical Specifications: Power Supply: Input voltage: 18 … 30 VDC with reverse polarity protection Ripple: ≤ 10 % at 24 VDC Consumption: approx. 150 mA at 18 V / approx. 60 mA at 30 V (unloaded) Connections: Screw terminal, 1,5 mm² / AWG 16 Encoder Supply: Number of auxiliary voltages: Encoder supply 1:...
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