SNC 021
S-DIAS Safety
Incremental Encoder
Date of creation: 14.11.2017
Version date: 02.12.2019
Article number: 20-896-021-E
Publisher: SIGMATEK GmbH & Co KG
A-5112 Lamprechtshausen
Tel.: +43/6274/4321
Fax : +43/6274/4321-18
Email: office@sigmatek.at
WWW.SIGMATEK-AUTOMATION.COM
Copyright © 2017
SIGMATEK GmbH & Co KG
Translation from German
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 SNC INCREMENTAL ENCODER SNC 021
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S-DIAS Safety SNC Incremental Encoder SNC 021
The S-DIAS Safety SNC incremental encoder module SNC 021 provides
the values of two incremental encoders, the Safety CPU as well as the nonSafe CPU (standard PLC).
The two-channel safety function "monitors" the increments in the
incremental encoder interfaces and processes the so-called Safety core in
two micro controllers with cross-communication.
The incremental encoder function is monitored through a 2-channel
analysis of the encoder signals, with 2-channel error detection of each data
line, as well as via the measurement of the encoder supply voltages and
currents.
Speed, position, direction and acceleration are monitored via the Safe
application in the Safety CPU.
The module detects various error types, such as a cable break, cross-circuit
and inverted input signals.
The safety functions of the module meet
• for two-channel application
the requirements for SIL 3 or SIL CL 3 in accordance with EN / IEC 62061 and PL e,
Cat. 4 in accordance with EN ISO 13849-1/-2
as well as
• for one-channel application,
the requirements for SIL 2 or SIL CL 2 in accordance with EN / IEC 62061 and PL d,
Cat. 2 in accordance with EN ISO 13849-1/-2.
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Contents
1 Basic Safety Guidelines .......................................................... 4
1.1 General Safety Information .......................................................... 4
1.2 Further Safety Guidelines ............................................................ 5
1.3 General Requirements ................................................................. 6
2 Conformity with EU Guidelines ............................................ 11
2.1 Functional Safety Standards ..................................................... 11
2.2 EU Conformity Declaration ........................................................ 11
2.3 Safety-Relevant Parameters ...................................................... 12
2.4 Compatibility ............................................................................... 13
3 Technical Data ....................................................................... 14
3.1 I-encoder Specifications ............................................................ 14
3.2 Electrical Requirements ............................................................. 14
3.3 Miscellaneous ............................................................................. 16
3.4 Environmental Conditions ......................................................... 16
4 Mechanical Dimensions ........................................................ 17
5 Connector Layout .................................................................. 18
5.1 Status LEDs ................................................................................. 19
5.2 Applicable Connectors ............................................................... 20
5.3 Label Field ................................................................................... 21
6 Wiring ..................................................................................... 22
S-DIAS SAFETY SNC INCREMENTAL ENCODER SNC 021
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6.1 Wiring Example ........................................................................... 22
6.2 Note .............................................................................................. 23
7 RS422 Interface ..................................................................... 23
8 Mounting ................................................................................ 24
9 Disposal ................................................................................. 25
10 Encoder Configuration ......................................................... 26
11 Installing the Encoder ........................................................... 28
12 Important Notes for Two-channel Application .................... 29
13 Supported Cycle Times ........................................................ 31
13.1 Cycle Times below 1 ms (in µs) ................................................. 31
13.2 Cycle Times equal to or higher than 1 ms (in ms) ................... 31
SNC 021 S-DIAS SAFETY SNC INCREMENTAL ENCODER
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1 Basic Safety Guidelines
1.1 General Safety Information
Non-compliance with the Safety guidelines can result in danger to personnel, which could
then lead to serious injury or in worst cases, death. In less serious cases, systems and
equipment can be damaged.
The following symbols identify the individual risks as well as the degree of seriousness; their
respective meanings are briefly explained below. You should therefore familiarize yourself
with the Safety symbols and their meanings to prevent dangers and risks.
DANGER
DANGER
Identifies an immediate danger with high risk, which
can lead to immediate death or serious injury if not
avoided.
Indique un danger direct à haut risque d’un décès
immédiat ou des blessures graves si les consignes de
sécurité ne sont pas respectées.
WARNING
WARNING
Identifies a possible danger with a mid-level risk, which
can lead to death or (serious) injury if not avoided.
Indique un danger possible d’un risque moyen de
décès ou de (graves) blessures si les consignes de
sécurité ne sont pas respectées.
CAUTION
CAUTION
Identifies a low risk danger, which can lead to injury or
property damage if not avoided.
Indique un danger avec un niveau de risque faible des
blessures légères ou des dommages matériels si les
consignes de sécurité ne sont pas respectées.
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1.2 Further Safety Guidelines
Warning, dangerous electrical voltage
Avertissement d’une tension électrique dangereuse
Hot surface warning
Avertissement d’une surface chaude
Danger for ESD-sensitive components
This symbol identifies important or additional
information regarding the operation of the safety
modules.
Ce symbole indique des informations importantes ou
supplémentaires concernant le fonctionnement des
modules de sécurité particuliers.
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1.3 General Requirements
Technical
Documentation
This technical documentation is a component of this product.
• This document must be accessible near the machine,
since it contains important instructions.
• The technical documentation should be included in the
sale, rental or transfer of the product.
Documentation technique
Cette documentation technique fait partie intégrale du produit.
• Gardez la toujours à portée de main et à la proximité de
la machine, car elle contient des informations
importantes.
• Distribuez la documentation technique aux secteurs de
la vente et/ou de la location du produit.
S-DIAS SAFETY SNC INCREMENTAL ENCODER SNC 021
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Acceptance of Safety
Guidelines
Before handling the product to which this documentation
belongs, the operating instructions and safety guidelines must be
read. SIGMATEK GmbH & Co KG accepts no liability for
damages resulting from non-compliance with the Safety
guidelines or applicable regulations.
Acceptance of the Safety guidelines and the explanations in this
document, as well as the Safety System Handbook (see
homepage1) are a basic requirement for proper use. Therefore,
read this operating manual thoroughly and familiarize yourself
with each of them in detail.
More information on standards and regulations etc. can be found
in the system handbook.
Prendre connaissance de consignes de sécurité
Avant toute manipulation on doit impérativement prendre
connaissance de consignes de sécurité et du mode d’emploi.
SIGMATEK GmbH & Co KG n'assume aucune responsabilité
pour les dommages causés par le non-respect des consignes de
sécurité ou du mode d’emploi respectif.
La connaissance de consignes de sécurité et le contenu de cette
documentation ainsi que le mode d’emploi du système de
sécurité constitue une condition préalable à l'utilisation prévue.
Lisez ce mode d’emploi et assurez-vous de le comprendre
jusqu’aux détails.
Pour plus d'informations sur les normes et les lignes directrices,
etc., reportez-vous au mode d’emploi
1
Using the search function with the keyword “Safety System Handbook”
SNC 021 S-DIAS SAFETY SNC INCREMENTAL ENCODER
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Qualified Personnel
Installation, assembly, programming and initial start-up,
operation, maintenance and decommissioning of control and
automation technology products in general, as well as safe
products in particular, 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
equipment of functional safety, systems and facilities in
compliance with the strict guidelines and standards of Safety
technology.
Personnel qualifié
Installation, montage, programmation, mise en service,
l'exploitation, l'entretien et mise hors service de produits de
commande et d'automatisation en général, et de produits liés à
la sécurité, en particulier, ne peut être effectuée que par le
personnel qualifié.
On entend sous terme personnel qualifié les personnes ayant
acquis une formation professionnelle dispensé par un spécialiste
sur l’utilisation et surveillance des composants et des systèmes
de sécurité, ceci conformément aux lignes directrices et les
normes en vigueur.
S-DIAS SAFETY SNC INCREMENTAL ENCODER SNC 021
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Designated Use
The Safety modules are designed for use in applications with a
requirement of functional safety and meet the required conditions
for Safe operation with the parameters specified in section 2.
For your own safety and the safety of others, use Safety modules
for their designated purpose only. Correct EMC installation as
well as proper transport and storage are also included under
designated use.
Non-designated use consists of:
• any change made to the Safety modules of any kind.
• the use of damaged Safety modules.
• the use of the Safety module inconsistent with the
instructions described in this handbook.
• The use of the safety module inconsistent with the
technical data described in this handbook.
Les modules de sécurité sont conçus pour une utilisation dans
les applications sollicitant un niveau de sécurité et répondent à
toutes les conditions nécessaires pour un fonctionnement sûr
conformément au niveau de performance e (PL e) selon la norme
EN ISO 13849-1/-2 et SIL 3 ou SIL CL 3 de la norme EN 62061.
Utilisation prévue
Utilisez le module de sécurité conformément à son mode
d’emploi pour votre propre sécurité et celle d'autres personnes.
L'utilisation conforme comprend également une installation
conforme CEM ainsi que le transport et le stockage conforme.
L'utilisation abusive comprend entre autres:
• Les modifications quelconques apportées aux modules
de sécurité.
• Utilisation de modules de sécurité endommagés.
• Utilisation de modules de sécurité en dehors du cadre
décrit dans ce mode d’emploi.
• Utilisation de modules de sécurité en dehors des
spécifications décrites dans ce mode d’emploi.
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