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NC20 - Manual - 01 - 2015
PREFACE
1 I N T R O D U C T I O N
1 I N T R O D U C T I O N
Scope and liability
This document describes the functions, the technical data of NC20 devices; instructions for mount-
ing, setting and commissioning are included.
This manual has been checked out, however, deviations from the description cannot be completely
ruled out, so that no liability in a legal sense for correctness and completeness of the information or
from any damage that might result from its use is formally disclaimed.
The information given in this document is reviewed regularly; any corrections and integration will be
included in subsequent editions that are identifi ed by the date of revision.
We appreciate any suggestions for improvement.
We reserve the right to make technical improvements without notice.
Applicability
This manual is valid for NC20 devices with fi rmware version 1.61 and following.
Conformity
The product complies with the CEE directives:
EMC Council Directives:
89/336/EEC
Low voltage Directives:
73/23/EEC
Copyright
All right reserved; It is forbidden to copy, modify or store material (document and sw) protected by
copyright without Thytronic consent.
Warranty
Thytronic warrants devices against defects in materials and workmanship under normal use for a
period of ONE (1) YEAR from the date of retail purchase by the original end-user purchaser (“War-
ranty Period”).
Safety recommendations
The warming contained in this document are all-important for safety; special attention must be paid
to the following symbols:
Installation and commissioning must be carried out by qualifi ed person; Thytronic assumes no re-
sponsibility for damages caused from improper use that does not comply all warning and caution in
this manual.
In particular the following requirements must be met:
Remove power before opening it.
Verify the voltage absence by means suitable instrumentation on relay connections; attention must
be paid to all circuits supplied by external sources (binary input, CT, etc...)
Care must be taken when handling metal parts (front panel, connectors).
Insulation tests
After insulation tests, hazardous voltages (capacitor charges,...) may be arise; it is advisable to grad-
ually reduce the test voltage avoiding to erase it abruptly.
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DANGER
Death, severe personal injury or substantial property damage will result if proper precautions
are not taken
DANGER
Death, severe personal injury or substantial property damage will result if proper precautions
are not taken
WARNING
Death, severe personal injury or substantial property damage can result if proper precautions
are not taken.
WARNING
Death, severe personal injury or substantial property damage can result if proper precautions
are not taken.
CAUTION
Minor personal injury or property damage can result if proper precautions are not taken
CAUTION
Minor personal injury or property damage can result if proper precautions are not taken
CAUTION
Settings must be established on the basis of a coordination study.
Numerical values inside examples have educational purpose only; they don’t be used, in no way,
for actual applications.
CAUTION
Settings must be established on the basis of a coordination study.
Numerical values inside examples have educational purpose only; they don’t be used, in no way,
for actual applications.
