The certificate of the Ex motor typically requires that you set a minimum limit for the output
switching frequency of the drive. Make sure that the Ex motor is operated above the minimum
output switching frequency specified by the motor manufacturer.
Compliance with the European ATEX Product Directive
2014/34/EU
The system integrator is responsible for the compliance of the complete motor thermal
protection circuit with the European ATEX Product Directive 2014/34/EU. If the compliance
of the system with the ATEX Product Directive requires the motor thermal protection, make
sure that:
• the drive/inverter module is equipped with the ATEX-certified Safe disconnection function
(option +Q971)
• the motor thermal protection relay is ATEX-compliant
• the motor thermal protection circuit is wired according to the instructions given in this
manual and in the motor manual and according to the installation requirements of the
relevant standard(s) of EN/IEC 60079 series.
Exclusion of liability
ABB is not responsible for the implementation, verification and validation of the overall safety
system. It is the responsibility of the system integrator (or other party) who is responsible
for the overall system and system safety.
The system integrator (or other responsible party) must make sure that the entire
implementation complies with the instructions in this manual, all relevant standards, directives
and local electrical code, and that the system is tested, verified and validated correctly.
Terms and abbreviations
DescriptionTerm
Directives 2014/34/EU and 1999/92/EC are commonly referred to as the ATEX direct-
ives (from "Atmosphères Explosibles")
ATEX
Frequency converter for controlling AC motorsDrive
Frequency converter enclosed in a metal frame or enclosure. Intended for cabinet
installation.
Drive module
An IEC term used in the context of explosive atmospheres (IEC 60079)Ex
Type of protection, flameproof enclosures (EN/IEC 60079-1)Ex d
Types of protection, increased safety (EN/IEC 60079-7)Ex eb, Ex ec
Motors used in explosive atmospheresEx motors
Optional pulse encoder interface module for safety encoderFSE-31
Safety functions module which supports the FSE-31 module and the use of safety
encoders
FSO-21
Safety functions module which does not support the use of encodersFSO-12
Hardware fault tolerance (IEC 61508)HFT
Inverter bridge, related components and drive DC link capacitors enclosed in a metal
frame or enclosure. Intended for cabinet installation.
Inverter module
Average probability of dangerous failure on demand (IEC 61508)PFD
avg
Average frequency of dangerous failures per hour (IEC 61508)PFH
Safe acceleration rangeSAR
Safe brake controlSBC
Safe failure fraction (%) (IEC 61508)SFF
12 Introduction
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