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wiring diagram.
The minimum ambiant temperature is -20°C and the maximum +40°C unless an other information
is mentioned on the identification tag.
1.8 SPECIAL
PRACTICES
Duty cycle: the motors are designed for an intermittent operation ; it means that they should
be stopped for a sufficient period of time after each operation in order to enable them to cool down
(see §1.4 operation). If the operating time is too high, the motor temperature will raise and will
eventually activate the thermal protection. This event must remain exceptional and everything must
be carried out to avoid switching the thermal protection during normal operation phases.
Covers opening: remove the covers only if there is no explosive atmosphere. It is important
not to degrade the explosion proof protections (surfaces, cable glands, gaskets, ...).
1.9 LIST OF APPLICABLE STANDARDS
IECEx: IEC 60079-0 (2017), IEC 60079-1 (2014), IEC 60079-7 (2017), IEC 60079-31 (2013), IEC 80079-36
(2016), IEC 80079-37 (2016)
ATEX: EN IEC 60079-0 (2018), EN 60079-1 (2014), EN IEC 60079-7 (2015) + A1 (2018), EN 60079-31
(2014), EN ISO 80079-36 (2016), EN ISO 80079-37 (2016)
2 PRODUCT OVERVIEW
Manual override
STX and SQX actuators incorporate a handwheel for manual control with an automatic clutch sys-
tem with motor-drive priority. The direction of rotation is normally clockwise for closing unless
otherwise specified.
3 STORAGE
Introduction
An actuator consists of electrical components plus mechanical parts which have life-long lubrication.
Although the assembly is contained in a waterproof housing, the actuators may suffer from oxidation,
become clogged or seize during commissioning if it has not been stored correctly.
OPERATION
CONDITIONS
Terminal
compartment
Emergency
handwheel
Power and controls
connection
INCLUDING
UNCORRECT
7
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