Rockwell Automation Publication 750-UM003D-EN-P - March 2017 9
Chapter 1
Safety Concepts
The PowerFlex® ATEX option module that is installed in a PowerFlex
750-Series drive or PowerFlex 755T drive products and equipped with an
11-Series I/O option module provides an ATEX-compliant safety function.
This ATEX-compliant function provides a safe turn-off for equipment that is
installed in a potentially explosive atmosphere according to 2014/34/EU.
ATEX Directive 2014/34/EU
The PowerFlex 750-Series drives and PowerFlex 755T drive products, together
with the ATEX and 11-Series I/O option modules, are compliant safety
devices under the ATEX directive 2014/34/EU, and satisfy requirements for
use in Group II, Category 2, (GD) applications with ATEX approved motors
as described here:
• Group II – The motor is installed in a potentially explosive atmosphere
that is not in a mine.
• Category 2 – The motor is likely to be exposed to an explosive
atmosphere. A high level of protection is required.
• GD – The explosive atmosphere consists of a mixture of (G) gas vapors
and (D) dust that can cause an explosion.
Certification of the drive for the ATEX group and category on its nameplate is
based on installation, operation, and maintenance according to these items:
•This user manual
• The requirements in the drive user manual and installation instructions
• The instruction manual for the motor
Topic Page
ATEX Directive 2014/34/EU 9
Motor Requirements 10
ATEX System 11
ATEX Function 11
Safe State 12
Hardware Fault Tolerance 13
Safety Reaction Time 13
Contact Information If Safety Option Failure Occurs 13
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