Rockwell Automation Publication 750-UM003D-EN-P - March 2017 33
Chapter 3
Verify Operation
Test the safety function for proper operation after initial installation and after
the drive system is modified. We recommend annual functional testing during
regular maintenance intervals.
Description of Functionality
The ATEX option module with 11-Series I/O option module provides ATEX
functionality for ATEX motors with thermostat contacts or PTC-type devices.
The module removes power from the gate firing circuits of the drive output
power devices (IGBTs) when the temperature circuit in the motor indicates
that the motor temperature is too high.
Topic Page
Description of Functionality 33
Motors with Thermostatic Switches 34
Motors with Positive Temperature Coefficient (PTC) Devices 35
Functional Proof Testing without a Test Fixture 36
WARNING: Risk of Explosion.
If any changes are made to an installed system, the operation of that system
must be verified. These changes include installation, removal, or modification
of ATEX or functional safety options. Failure to verify that the operation of a
completed installation can result in a safety system that does not function
correctly. See Verify Operation on page 33
.
IMPORTANT For installation of PowerFlex 755T drive products (frame 8 and larger) check
your drive firmware release notes for known anomalies and verify that there
are no safety-related anomalies.
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