SIGMA TEK SSI 021 User manual

SSI 021
S-DIAS Safety
SSI Absolute Value Encoder
Instruction Manual
Date of creation: 25.02.2014
Version date: 05.12.2023
Article number: 20-894-021-E

Publisher: SIGMATEK GmbH & Co KG
A-5112 Lamprechtshausen
Tel.: [phone]
Fax: [phone]
Email: [email protected]
WWW.SIGMATEK-AUTOMATION.COM
Copyright © 2014
SIGMATEK GmbH & Co KG
Translation of the Original Instruction
All rights reserved. No part of this work may be reproduced, edited using an electronic system, duplicated or
distributed in any form (print, photocopy, microfilm or in any other process) without the express permission.
We reserve the right to make changes in the content without notice. The SIGMATEK GmbH & Co KG is not responsible
for technical or printing errors in the handbook and assumes no responsibility for damages that occur through use
of this handbook.

S-DIAS SAFETY SSI ABSOLUTE ENCODER SSI 021
05.12.2023 Page 1
S-DIAS Safety SSI Absolute Value Encoder SSI 021
The S-DIAS Safety SSI absolute value encoder module SSI 021 provides
the values of two absolute value encoders to the Safety CPU as well as the
non-Safe CPU (standard PLC). Since hardware version 2.0 rotary encoders
are supported.
The 2-channel Safety function is implemented by processing the position
values in the so-called Safety core (two micro controllers with cross
communication).
The connection to the Safety CPU (SCP 011 / SCP 111) is made via the
internal Safety but, which is completely independent of the S-DIAS bus.
The components supply the Safety CPU values, such as position, speed
and absolute value limit violation. For a detailed listing of the function and
settable parameters, see the module description in the SafetyDesigner.
The SSI 021 parameters are set via the program in the default PLC (bit
length of the SSI signal, SSI frequency, ...) and therewith, participants in
the S-DIAS bus of the standard PLC as well as on the internal Safety bus
of the Safety CPU. Stand-alone mode with a Safety CPU (without standard
PLC) is therefore not possible.
The safety-related component of the module meets the requirements for SIL3 in accordance
with EN IEC 62061 and PL e, cat. 4 in accordance with EN ISO 13849 (with two-channel
use).

SSI 021 S-DIAS SAFETY SSI ABSOLUTE ENCODER
Page 2 05.12.2023
Contents
1Introduction............................................................................. 5
1.1 Target Group/Purpose of this Operating Manual......................5
1.2 Important Reference Documentation .........................................5
1.3 Contents of Delivery.....................................................................5
2Basic Safety Guidelines......................................................... 6
2.1 Symbols Used...............................................................................6
2.2 Disclaimer......................................................................................8
2.3 General Safety Directives ............................................................9
2.4 Designated Use...........................................................................11
2.5 Software/Training .......................................................................12
3Standards and Directives......................................................13
3.1 Residual Risks ............................................................................13
3.2 Safety of the Machine or Equipment ........................................13
3.3 Directives.....................................................................................13
3.3.1 Functional Safety Standards..............................................................14
3.3.2 EU Conformity Declaration................................................................14
3.4 Safety-Relevant Parameters......................................................15
3.4.1 Mounting Position Horizontal 0-55 °C Ambient Temperature ............15
3.4.2 Mounting Position Horizontal 0-60 °C Ambient Temperature ............15
3.5 Compatibility...............................................................................16
4Type Plate...............................................................................17

S-DIAS SAFETY SSI ABSOLUTE ENCODER SSI 021
05.12.2023 Page 3
5Technical Data.......................................................................18
5.1 SSI Encoder Specifications.......................................................18
5.2 Electrical Requirements.............................................................19
5.3 Miscellaneous .............................................................................21
5.4 Environmental Conditions.........................................................21
6Mechanical Dimensions........................................................22
7Connector Layout..................................................................23
7.1 Status LEDs.................................................................................24
7.2 Applicable Connectors...............................................................24
7.3 Label Field...................................................................................25
8Wiring.....................................................................................26
8.1 Wiring Example...........................................................................26
8.2 Note..............................................................................................27
9RS422 Interface .....................................................................27
10 Installing the Encoder...........................................................28
11 Important Notes for Two-channel Application....................29
12 Assembly/Installation ...........................................................31
12.1 Check Contents of Delivery.......................................................31
12.2 Mounting......................................................................................32
13 Transport/Storage .................................................................34

SSI 021 S-DIAS SAFETY SSI ABSOLUTE ENCODER
Page 4 05.12.2023
14 Storage ...................................................................................34
15 Maintenance...........................................................................35
15.1 Service.........................................................................................35
15.2 Repair...........................................................................................35
16 Disposal..................................................................................35

S-DIAS SAFETY SSI ABSOLUTE ENCODER SSI 021
05.12.2023 Page 5
1 Introduction
1.1 Target Group/Purpose of this Operating Manual
This operating manual contains all information required for the operation of the product.
This operating manual is intended for:
•Project planners
•Technicians
•Commissioning engineers
•Machine operators
•Maintenance/test technicians
General knowledge of automation technology is required.
Further help and training information, as well as the appropriate accessories can be found on
our website www.sigmatek-automation.com.
Our support team is happily available to answer your questions.
Please see our website for our hotline number and business hours.
1.2 Important Reference Documentation
•Safety System Handbook
This and additional documents can be downloaded from our website or obtained through
support.
1.3 Contents of Delivery
1x SSI 021

SSI 021 S-DIAS SAFETY SSI ABSOLUTE ENCODER
Page 6 05.12.2023
2 Basic Safety Guidelines
2.1 Symbols Used
The following symbols are used in the operator documentation for warning and danger
messages, as well as informational notes:
DANGER
Danger indicates that death or serious injury will occur, if the
specified measures are not taken.
To avoid death or serious injuries, observe all guidelines.
Danger indique une situation dangereuse qui, faute de prendre les
mesures adéquates, entraînera des blessures graves, voire mortelles.
Respectez toutes les consignes pour éviter des blessures
graves, voire mortelles.
WARNING
Warning indicates that death or serious injury can occur, if the
specified measures are not taken.
To avoid death or serious injuries, observe all guidelines.
Avertissement d’une situation dangereuse qui, faute de prendre les
mesures adéquates, entraînera des blessures graves, voire mortelles.
Respectez toutes les consignes pour éviter des blessures
graves, voire mortelles.
CAUTION
Caution indicates that moderate to slight injury can occur, if the
specified measures are not taken.
To avoid moderate to slight injuries, observe all guidelines.
Attention indique une situation dangereuse qui, faute de prendre les
mesures adéquates, peut entraîner des blessures assez graves ou
légères.
Respectez toutes les consignes pour éviter des blessures
graves, voire mortelles.

S-DIAS SAFETY SSI ABSOLUTE ENCODER SSI 021
05.12.2023 Page 7
CAUTION
Danger for ESD-sensitive components.
Les signes de danger pour les composants sensibles aux décharges
électrostatiques.
INFORMATION
Information
Provides important information on the product, handling or
relevant sections of the documentation, which require
attention.

SSI 021 S-DIAS SAFETY SSI ABSOLUTE ENCODER
Page 8 05.12.2023
2.2 Disclaimer
INFORMATION
The contents of this operating manual were prepared with the greatest
care. However, deviations cannot be ruled out. This operating manual
is regularly checked and required corrections are included in the
subsequent versions. The machine manufacturer is responsible for the
proper assembly, as well as device configuration. The machine
operator is responsible for safe handling, as well as proper operation.
The current operating manual can be found on our website. If
necessary, contact our support.
Subject to technical changes, which improve the performance of the
devices. The following operating manual is purely a product
description. It does not guarantee properties under the warranty.
Please thoroughly read the corresponding documents and this
operating manual before handling a product.
SIGMATEK GmbH & Co KG is not liable for damages caused
through, non-compliance with these instructions or applicable
regulations.

S-DIAS SAFETY SSI ABSOLUTE ENCODER SSI 021
05.12.2023 Page 9
2.3 General Safety Directives
The Safety Directives in the other sections of this operating manual must be observed. These
instructions are visually emphasized by symbols.
INFORMATION
According to EU Directives, the operating manual is a component of a
product.
This operating manual must therefore be accessible in the vicinity of the
machine since it contains important instructions.
This operating manual should be included in the sale, rental or transfer
of the product, or its online availability indicated.
Regarding the requirements for Safety and health connected to the use
of machines, the manufacturer must perform a risk assessment in
accordance with machine directives 2006/42/EG before introducing a
machine to the market.
Operate the unit with devices and accessories approved by SIGMATEK
only.

SSI 021 S-DIAS SAFETY SSI ABSOLUTE ENCODER
Page 10 05.12.2023
CAUTION
Handle the device with care and do not drop or let fall.
Prevent foreign bodies and fluids from entering the device.
The device must not be opened!
Manipulez l’appareil avec précaution et ne le laissez pas tomber.
Empêchez les corps étrangers et les liquides de pénétrer dans
l’appareil.
L’appareil ne doit pas être ouvert!
If the device does not function as intended or has damage that could
pose a danger, it must be replaced!
En cas de fonctionnement non conforme ou de dommages pouvant
entraîner des risques, l'appareil doit être remplacé!
The module complies with EN 61131-2.
In combination with a facility, the system integrator must comply with
EN 60204-1 standards.
For your own safety and that of others, compliance with the
environmental conditions is essential.
Le module est conforme à la norme EN 61131-2.
En combinaison avec une équipement, l’intégrateur de système doit
respecter la norme EN 60204-1.
Pour votre propre sécurité et celle des autres, le respect des conditions
environnementales est essential.

S-DIAS SAFETY SSI ABSOLUTE ENCODER SSI 021
05.12.2023 Page 11
2.4 Designated Use
The Safety functions implemented in the product are designed for use with safety applications
in a SIGMATEK control and meet the required conditions for safe operation according to SIL
3, HFT 1 n compliance with EN 62061 and according to PL e, Kat. 4 in compliance with EN
ISO 13849-1.
CAUTION
The instructions contained in this operating manual must be followed.
For error-free operation, proper transport and storage are essential.
Installation, mounting, programming, initial start-up, operation,
maintenance and decommissioning can only be performed by qualified
personnel.
Qualified personnel in this context are people, who have completed
training or have trained under supervision of qualified personnel and
have been authorized to operate and maintain safety-related
equipment, systems and facilities in compliance with the strict
directives and standards of safety technology (Functional Safety).
Les instructions contenues dans ce manuel technique doivent être
suivies.
Pour un fonctionnement sans erreur, le transport et le stockage
appropriés sont essentiels.
L’installation, le montage, la programmation, la mise en service initiale,
l’exploitation, la maintenance et la mise hors service ne peuvent être
effectués que par une personne qualifiée.
Dans ce contexte, on entend par personnel qualifié les personnes
qui ont suivi une formation ou qui ont été formées sous la
supervision d’un personnel qualifié et qui ont été autorisées à
utiliser et à entretenir l’équipement, les systèmes et les
installations de sécurité conformément aux directives et aux
normes strictes de la technique de sécurité (Sécurité
fonctionnelle).
For your own safety and that of others, the product should be used for
their designated purpose only.
Correct EMC installation is also included under designated use.
Pour votre propre sécurité et celle des autres, le produit ne doivent être
utilisés qu’à des fins prévues.

SSI 021 S-DIAS SAFETY SSI ABSOLUTE ENCODER
Page 12 05.12.2023
Une installation CEM correcte est également incluse dans l’utilisation
prévue.
Non-designated use consists of:
•any changes made to the module or the use of damaged
modules.
•use of the module inconsistent with the technical margins
described in this operating manual or the specifications defined
in the technical data.
L'utilisation non désignée consiste en:
•toute modification apportée au module ou l'utilisation des
modules endommagés.
•utilisation du module non conforme aux marges techniques
décrites dans ce manuel ou aux spécifications définies dans
les données techniques.
Before delivering the module, the machine manufacturer must ensure
that it is in “delivery condition”. See chapter Transport/Storage for more
information.
Avant de livrer le module, le constructeur de la machine doit s'assurer
qu'il est en "état de livraison". Voir le chapitre Transport/Storage pour
plus d’informations.
2.5 Software/Training
The application is created with the software LASAL CLASS 2 and LASAL SCREEN Editor,
the Safety application is created using the SAFETYDesigner. Basic information on Safety
(Functional Safety) can be found in the Safety System Handbook.
Training for the LASAL development environment, with which the product can be configured,
is provided. Information on our training schedule can be found on our website.

S-DIAS SAFETY SSI ABSOLUTE ENCODER SSI 021
05.12.2023 Page 13
3 Standards and Directives
3.1 Residual Risks
CAUTION
The following residual risks for the product must be included in the
system integrator's risk assessment:
•Release of non-environmentally safe substances, emissions
and unusual temperatures
•Possible effects of information technology devices
Les risques résiduels suivants pour le produit doivent être inclus dans
l'évaluation des risques de l'intégrateur de système:
•Libération de substances non respectueuses de
l'environnement, émissions et températures inhabituelles
•Effets possibles des dispositifs de technologie de l'information
3.2 Safety of the Machine or Equipment
INFORMATION
Observe all on-site rules and regulations for accident prevention
and occupational safety.
3.3 Directives
The product was constructed in compliance with the following European Union directives and
tested for conformity.

SSI 021 S-DIAS SAFETY SSI ABSOLUTE ENCODER
Page 14 05.12.2023
3.3.1 Functional Safety Standards
EN IEC 62061 - Safety of machinery - Functional safety of safety-related control systems
EN ISO 13849-1 - Safety of machinery —Safety-related parts of control systems —Part 1:
General principles for design
EN ISO 13849-2 - Safety of machinery —Safety-related parts of control systems —Part 2:
Validation
3.3.2 EU Conformity Declaration
EU Declaration of Conformity
The product SSI 021 conforms to the following European directives:
•2006/42/EG Machine Directive
•2014/30/EU Electromagnetic Compatibility (EMC Directive)
•2011/65/EU “Restricted use of certain hazardous substances in
electrical and electronic equipment” (RoHS Directive)
The EU Conformity Declarations are provided on the SIGMATEK website.
See Products/Downloads or use the search function and the keyword “EU
Declaration of Conformity”.

S-DIAS SAFETY SSI ABSOLUTE ENCODER SSI 021
05.12.2023 Page 15
3.4 Safety-Relevant Parameters
3.4.1 Mounting Position Horizontal 0-55 °C Ambient Temperature
Input Module
Safety Parameters
Safety Levels
SSI 021 including CPU module
SCP 011/SCP 111
1-channel application:
PFHD = 2.4E-8 (1/h)
MTTFD = 660 years
DC = 85 %
SFF = 95 %
1-channel application:
PL d1) / Cat. 2
SIL 2
2-channel application:
PFHD = 2.7E-09 (1/h)
MTTFD = 677 years
DC = 99 %
SFF = 99 %
2-channel application:
PL e / Cat. 4
SIL 3
1) According to Table 5 and the corresponding notes EN / ISO 13849 in the "medium" range. In
combination with the high MTTFDvalue and the good PFHDvalue, DC is the performance level PLd
according to table K.1.
3.4.2 Mounting Position Horizontal 0-60 °C Ambient Temperature
Input Module
Safety Parameters
Safety Levels
SSI 021 including CPU module
SCP 011/SCP 111
1-channel application:
PFHD = 3.0E-8 (1/h)
MTTFD = 566 years
DC = 84 %
SFF = 95 %
1-channel application:
PL d1) / Cat. 2
SIL 2
2-channel application:
PFHD = 3.2E-09 (1/h)
MTTFD = 579 years
DC = 99 %
SFF = 99 %
2-channel application:
PL e / Cat. 4
SIL 3

SSI 021 S-DIAS SAFETY SSI ABSOLUTE ENCODER
Page 16 05.12.2023
Input Module
Safety Parameters
Safety Levels
SSI 021 including CPU module
SCP 211/SCP 111-S
1-channel application:
PFHD = 3.0E-8 (1/h)
MTTFD = 477 years
DC = 87 %
SFF = 96 %
1-channel application:
PL d1) / Cat. 2
SIL 2
2-channel application:
PFHD = 2.7E-09 (1/h)
MTTFD = 677 years
DC = 99 %
SFF = 99 %
2-channel application:
PL e / Cat. 4
SIL 3
1) According to Table 5 and the corresponding notes EN / ISO 13849 in the "medium" range. In
combination with the high MTTFDvalue and the good PFHDvalue, DC is the performance level PLd
according to table K.1.
3.5 Compatibility
INFORMATION
Compatibility
For compatibility of the S-DIAS Safety modules, see section
"Compatibility of S-DIAS Safety Modules" in the system handbook.
Compatibility SSI Encoder
When selecting the SSI encoder, it must be ensured that the absolute
value range of the encoder covers the entire range of use.
For the support of rotary encoders, the absolute position of the encoder
in the safety control is extended to 32bit. This 32bit extension is not
saved and after a restart of the safety control the absolute position of the
encoder is loaded again.
Position monitoring outside the absolute value range of the encoder is
not permitted.

S-DIAS SAFETY SSI ABSOLUTE ENCODER SSI 021
05.12.2023 Page 17
4 Type Plate
HW: Hardware version
SW: Software version

SSI 021 S-DIAS SAFETY SSI ABSOLUTE ENCODER
Page 18 05.12.2023
5 Technical Data
5.1 SSI Encoder Specifications
Number
2
Encoder
absolute encoder with RS422 interface
Data transfer speed
125 kHz, 250 kHz, 500 kHz, 1 MHz (configurable)
Encoder resolution
maximum 32 bits
Coding
binary / gray
Encoder power supply
+24 V supply, maximum 300 mA when installing the SSI 021 in ambient
temperature up to 50 °C
+24 V supply, maximum 200 mA in 60 °C ambient temperature
internal voltage monitor +24 V (+20 % / -15 %)
Status LED
yes
INFORMATION
A fuse for the supply voltage must be installed, which can sufficiently
limit voltage and current.