Lika SMA5-GA Series User manual

User's guide
SMA5 +
MTA5
•SMA5 absolute linear encoder
•MTA5 tape, 5 mm pitch, unaffected by dust and liquids
•Max measuring length 5,100 mm / 200 787”
•Resolution from 100 µm down to 5 µm
•SSI interface
Suitable for the following models:
•SMA5 -GA-
Table of Contents
Preliminary information 5
1 - Safety summary 6
2 - Identification 7
3 – Mounting instructions 8
4 - Electrical connections 11
5 - SSI interface 14
6 – Error and fault diagnostics 17
7 - Maintenance 18
8 - Troubleshooting 19
Lika Electronic • Tel [phone] • info@lika biz • www lika biz
Smart encoders & actuators

This publication was produced by Lika Electronic s.r.l. 2020. All rights reserved. Tutti i diritti riservati. Alle Rechte vorbehalten. Todos los
derechos reservados. Tous droits réservés.
This document and in ormation contained herein are the property o Lika Electronic s.r.l. and shall not be reproduced in whole or in
part without prior written approval o Lika Electronic s.r.l. Translation, reproduction and total or partial modi ication (photostat copies,
ilm and micro ilm included and any other means) are orbidden without written authorisation o Lika Electronic s.r.l.
The in ormation herein is subject to change without notice and should not be construed as a commitment by Lika Electronic s.r.l. Lika
Electronic s.r.l. reserves the right to make all modi ications at any moments and without orewarning.
This manual is periodically reviewed and revised. As required we suggest checking i a new or updated edition o this document is
available at Lika Electronic s.r.l.'s website. Lika Electronic s.r.l. assumes no responsibility or any errors or omissions in this document.
Critical evaluation o this manual by the user is welcomed. Your comments assist us in preparation o uture documentation, in order
to make it as clear and complete as possible. Please send an e-mail to the ollowing address in [email protected] or submitting your
comments, suggestions and criticisms.

General contents
User's guide............................................................................................................................................................................................1
General contents..................................................................................................................................................................................3
Typographic and iconographic conventions........................................................................................................................4
Preliminary information..................................................................................................................................................................5
1 - Safety summary 6
1.1 Sa ety..........................................................................................................................................................................................6
1.2 Electrical sa ety.......................................................................................................................................................................6
1.3 Mechanical sa ety..................................................................................................................................................................7
2 - Identification 7
3 – Mounting instructions 8
3.1 Overall dimensions................................................................................................................................................................8
3.2 Magnetic tape.........................................................................................................................................................................8
3.3 Mounting the sensor............................................................................................................................................................9
4 - Electrical connections 11
4.1 M12 8-pin connector speci ications...........................................................................................................................11
4.2 M8 cable speci ications....................................................................................................................................................11
4.3 Ground connection............................................................................................................................................................12
4.4 Zero setting............................................................................................................................................................................12
4.5 Counting direction..............................................................................................................................................................12
4.6 Features summary...............................................................................................................................................................13
5 - SSI interface 14
5.1 SSI (Synchronous Serial Inter ace)...............................................................................................................................14
5.2 LSB Right Aligned protocol.............................................................................................................................................15
5.3 Recommended transmission rates...............................................................................................................................16
6 – Error and fault diagnostics 17
6.1 Diagnostic LED......................................................................................................................................................................17
7 - Maintenance 18
8 - Troubleshooting 19

Typographic and iconographic conventions
In this guide, to make it easier to understand and read the text the ollowing typographic and
iconographic conventions are used:
•parameters and objects both o the device and the inter ace are coloured in GREEN;
•alarms are coloured in RED;
•states are coloured in FUCSIA.
When scrolling through the text some icons can be ound on the side o the page: they are expressly
designed to highlight the parts o the text which are o great interest and signi icance or the user.
Sometimes they are used to warn against dangers or potential sources o danger arising rom the use o
the device. You are advised to ollow strictly the instructions given in this guide in order to guarantee
the sa ety o the user and ensure the per ormance o the device. In this guide the ollowing symbols are
used:
This icon, ollowed by the word WARNING, is meant to highlight the parts o the
text where in ormation o great signi icance or the user can be ound: user must
pay the greatest attention to them! Instructions must be ollowed strictly in order
to guarantee the sa ety o the user and a correct use o the device. Failure to heed
a warning or comply with instructions could lead to personal injury and/or damage
to the unit or other equipment.
This icon, ollowed by the word NOTE, is meant to highlight the parts o the text
where important notes need ul or a correct and reliable use o the device can be
ound. User must pay attention to them! Failure to comply with instructions could
cause the equipment to be set wrongly: hence a aulty and improper working o
the device could be the consequence.
This icon is meant to highlight the parts o the text where suggestions use ul or
making it easier to set the device and optimize per ormance and reliability can be
ound. Sometimes this symbol is ollowed by the word EXAMPLE when instructions
or setting parameters are accompanied by examples to clari y the explanation.

Preliminary information
This guide is designed to provide the most complete and exhaustive in ormation the operator needs to
correctly and sa ely install and operate the SMA5 series absolute linear encoder.
SMA5 is designed to measure displacements in industrial machines and automation systems. The
measurement system includes a magnetic tape and a magnetic sensor with conversion electronics. The
scale is magnetized with a coded sequence o North-South poles generating an absolute pattern. As the
encoder moves along the magnetic scale, the sensor detects the displacement and yields the absolute
position in ormation through the SSI inter ace (order code SMA5-GA-...).
It is mandatory to pair the sensor with the MTA5 type magnetic tape.
To make it easier to read and understand the text, this guide can be divided into two main sections.
In the irst section some general in ormation concerning the sa ety, the mechanical installation and the
electrical connection as well as tips or setting up and running properly and e iciently the unit are
provided.
In the second section, entitled SSI interface, both general and speci ic in ormation is given on the SSI
inter ace.

SMA5
1 - Safety summary
1 1 Safety
•Always adhere to the pro essional sa ety and accident prevention
regulations applicable to your country during device installation and
operation;
•installation and maintenance operations have to be carried out by
quali ied personnel only, with power supply disconnected and stationary
mechanical parts;
•device must be used only or the purpose appropriate to its design: use or
purposes other than those or which it has been designed could result in
serious personal and/or the environment damage;
•high current, voltage and moving mechanical parts can cause serious or
atal injury;
•warning ! Do not use in explosive or lammable areas;
•ailure to comply with these precautions or with speci ic warnings
elsewhere in this manual violates sa ety standards o design, manu acture,
and intended use o the equipment;
•Lika Electronic assumes no liability or the customer's ailure to comply
with these requirements.
1 2 Electrical safety
•Turn OFF power supply be ore connecting the device;
•connect the unit according to the explanation in the ”4 - Electrical
connections” section on page 11;
•the wires o unused signals must be cut at di erent lengths and insulated
singularly;
•connect Zero setting and Counting direction inputs to 0Vdc, i not used;
- to zero set the encoder, connect the Zero setting input to +Vdc or 100
µs at least, then disconnect +Vdc; normally voltage must be at 0Vdc; zero
setting must be per ormed a ter Counting direction; we suggest
per orming the zero setting when the encoder is in stop;
- Counting direction (see the “3 – Mounting instructions” section):
increasing count = connect to 0Vdc; decreasing count = connect to
+Vdc;
•in compliance with 2014/30/UE norm on electromagnetic
compatibility, ollowing precautions must be taken:
- be ore handling and installing the equipment, discharge
electrical charge rom your body and tools which may come in touch
with the device;
- power supply must be stabilized without noise; install EMC ilters on
device power supply i needed; T or P type LC ilters are o ten adequate;
- always use shielded cables (twisted pair cables whenever possible);
- avoid cables runs longer than necessary;
- avoid running the signal cable near high voltage power cables (e.g. drive
cables);
- install the device as close as possible to the electronic control unit;
- mount the device as ar as possible rom any capacitive or inductive
noise source; shield the device rom noise source i needed;
MAN SMA5 E 1.8.odt 1 - Sa ety summary 6 o 20

SMA5
- mount the device as ar as possible rom the inverter (i installed in the
machine); shield the device i needed;
- to guarantee a correct working o the device, avoid using strong magnets
on or near by the unit;
- minimize noise by connecting the cable shield and/or the connector
housing and/or the sensor to ground. Make sure that ground is not
a ected by noise. The connection point to ground can be situated both
on the device side and on user’s side. The best solution to minimize the
inter erence must be carried out by the user.
1 3 Mechanical safety
•Install the device ollowing strictly the in ormation in the “3 – Mounting
instructions” section on page 8;
•mechanical installation has to be carried out with stationary mechanical
parts;
•do not disassemble the unit;
•do not tool the unit;
•delicate electronic equipment: handle with care; do not subject the device
to knocks or shocks;
•protect the unit against acid solutions or chemicals that may damage it;
•respect the environmental characteristics o the product;
•we suggest installing the unit providing protection means against waste,
especially swar as turnings, chips, or ilings; should this not be possible,
please make sure that adequate cleaning measures (as or instance
brushes, scrapers, jets o compressed air, etc.) are in place in order to
prevent the sensor and the magnetic scale rom jamming.
CAUTION
Keep magnets away rom the tape, it could be damaged by strong magnetic
ields.
2 - Identification
Device can be identi ied through the order code and the serial number printed
on the label applied to its body. In ormation is listed in the delivery document
too. Please always quote the order code and the serial number when reaching
Lika Electronic or purchasing spare parts or needing assistance. For any
in ormation on the technical characteristics o the product re er to the
technical datasheet.
Warning: devices having order code ending with "/Sxxx" may have
mechanical and electrical characteristics di erent rom standard
and be supplied with additional documentation or special
connections (Technical In o).
MAN SMA5 E 1.8.odt 2 - Identi ication 7 o 20

SMA5
3 – Mounting instructions
WARNING
Installation has to be carried out by quali ied personnel only, with power supply
disconnected and mechanical parts compulsorily in stop.
3 1 Overall dimensions
3 2 Magnetic tape
The sensor has to be paired with the MTA5 type magnetic scale only. For
detailed in ormation on the MTA5 type scale and how to mount it re er to the
speci ic technical documentation.
Install the unit providing protection means against waste, especially swar as
turnings, chips, or ilings; should this not be possible, please make sure that
adequate cleaning measures (as or instance brushes, scrapers, jets o
compressed air, etc.) are in place in order to prevent the sensor and the
magnetic scale rom jamming.
Make sure the mechanical installation meets the system's requirements o
distance, planarity and parallelism between the sensor and the scale indicated in
Figure 2 all along the whole measuring length.
MTA5 magnetic scale can be provided with a cover strip to protect its magnetic
sur ace (see the order code).
The Figure 1 shows how the sensor and the scale must be installed; the arrow
indicates the standard counting direction (increasing count, see on page 12).
WARNING
The system cannot work i mounted otherwise than illustrated in Figure 1.
MAN SMA5 E 1.8.odt 3 – Mounting instructions 8 o 20

SMA5
3 3 Mounting the sensor
Figure 1
Make sure the mechanical installation complies with the system requirements
concerning distance, planarity and parallelism between the sensor and the scale.
Avoid contact between the parts. Sensor is ixed by means o two M5 25 mm
min long cylinder head screws inserted in the provided holes. Recommended
minimum bend radius o the cable: R  42 mm.
Please note that the MTA5 magnetic scale can be provided with a cover strip to
protect its magnetic sur ace (see the order code). There ore the distance
between the sensor and the magnetic scale is di erent whether the cover strip
is applied.
The allowed gap D (see Figure 2) between the sensor and the scale must
be in the range indicated in the following table:
Gap sensor / MTA5 magnetic scale (D)
without cover strip with cover strip
0.1 – 1.0 mm / 0.004” - 0.04” 0.1 – 0.6 mm / 0.004” - 0.024”
WARNING
Make sure the mechanical installation complies with the system requirements
concerning distance, planarity and parallelism between the sensor and the scale
as shown in Figure 2 all along the whole measuring length.
MAN SMA5 E 1.8.odt 3 – Mounting instructions 9 o 20

SMA5
Figure 2
WARNING
A ter having installed the sensor on the magnetic scale a zero setting operation
is compulsorily required. The zero setting operation is urther required every
time either the sensor or the scale is replaced. For urther in ormation re er to
page 12.
CAUTION
Keep magnets away rom the tape, it could be damaged by strong magnetic
ields.
MAN SMA5 E 1.8.odt 3 – Mounting instructions 10 o 20