Rockwell Automation 20-750-ATEX PowerFlex 750-Series ATEX Option Module - Manual (Page 7)

Rockwell Automation Publication 750-UM003B-EN-P - July 2013 7
Preface
Motor Requirements
• The motor must be manufactured under the guidelines of the ATEX
directive 94/9/EC. The motor must be installed, operated, and
maintained according to the instructions of the motor manufacturer.
• Only motors with nameplates marked for use on an inverter power source,
and labeled for specific hazardous areas, can be used in hazardous areas on
inverter (variable frequency) power.
• When the motor is rated ATEX Group II, Category 2 for use in gas
environments (category 2G), the motor must be of flameproof
construction, EEx d (according to EN 50018) or Ex d (according to
EN 60079-1 or IEC 60079-1). Group II motors are marked with a
temperature or a temperature code.
• When the motor is rated ATEX Group II, Category 2 for use in dust
environments (category 2D), the motor must be protected by an enclosure
(according to EN 50281-1-1, or according to
IEC 61241-1: Ex tD). Group II motors are marked with a temperature.
• The motor over-temperature signal is supplied to the drive by one of two
methods:
– A normally closed contact (open during over temperature condition)
compatible with the digital (logic) input circuitry of the drive. If
multiple sensors are required in the motor, the connection at the drive
must be the result of all required contacts wired in series.
– A positive temperature coefficient (PTC) type of thermal sensor. Refer
to Appendix A for specifications.
• Refer to all product markings for additional cautions.
• Typical motor markings are contained on a motor certification nameplate
similar to the sample below.
FLAMEPROOF Exd ENCLOSURE
EExd I/IIB Tamb C to C
II 2 G/D
I M2 Sira ATEX
MFG. BY ROCKWELL AUTOMATION
0518