25.
Applications in Ex zone 22 (option)
Multi-turn actuators of type range SA 07.1 – SA 16.1/SAR 07.1 – SAR 16.1
in version AUMA MATIC basically meet the requirements for applications in
dust hazardous locations of ZONE 22, in compliance with the ATEX direc-
tive 94/9/EC.
The actuators are designed to meet enclosure protection IP 67 or IP 68 and
fulfil the requirements of EN 50281-1-1:1998 section 6 – Electrical appara-
tus for use in presence of combustible dust hazards, requirements for elec-
trical equipment of category 3 – protected by enclosures.
To comply with all requirements of EN 50281-1-1: 1998, the following points
must imperatively be observed:
.
In compliance with the ATEX directive 94/9/EC, the actuators must be
equipped with an additional identification – II3D IP6X T150 °C.
.
The maximum surface temperature of the actuators, based on an ambient
temperature of + 40 °C in accordance with EN 50281-1-1 section 10.4, is
150 °C. In accordance with section 10.4, an increased dust deposit on the
equipment was not considered for the determination of the max. surface
temperature.
.
The correct connection of the thermoswitches or the PTC thermistors as
well as the fulfilment of the type of duty and the technical data are prereq-
uisites for compliance with the maximum surface temperature of part-turn
actuators.
.
The connection plug may only be plugged in or pulled out when actuator
and controls are disconnected from the mains.
.
The cable glands used also have to meet the requirements of category
II3D and must at least comply with enclosure protection IP 67.
.
The actuators must be connected by means of an external ground con-
nection (accessory part) to the potential equalization or integrated into a
grounded piping system.
.
The screw plug (part no. 27) or the protection tube with cap
(part nos. 160.1 and 160.2) for sealing the hollow shaft must imperatively
be mounted to guarantee the combustible dust hazard protection.
.
As a general rule, the requirements of EN 50281-1-1 must be respected in
dust hazardous locations. During commissioning, service, and mainte-
nance, respective special care as well as qualified and trained personnel
is required for the safe operation of multi-turn actuators.
51
Multi-turn actuators SA 07.1 – SA 30.1/SAR 07.1 – SAR 30.1
Operation instructions
with actuator controls AUMA MATIC AM 01.1/AM 02.1
