ACS-CONTROL-SYSTEM GmbH l Lauterbachstr. 57 l D-84307 Eggenfelden l www.acs-controlsystem.de l [email protected]
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2.3 Operating supplies for explosive hazardous areas
If a device is installed and operated in explosive hazardous areas, the general Ex construction
standards (EN/IEC 60079-14, VDE 0165), these safety notes and the enclosed EU type examination
certificate incl. supplements must be observed.
The installation of explosive hazardous systems must be carried out principally by specialist staff.
The device meets the classification:
II 1 G Ex ia IIB/IIC Tx Ga
II 1/2 G Ex ia IIB/IIC Tx Ga/Gb
T
a
= - 20…+60°C/+50°C
II 2 G Ex ib IIB/IIC Tx Gb
T
a
= - 40…+85°C/+50°C
The devices are conceived for measuring of pressures in explosive hazardous areas.
The measured medium may also be combustible liquids, gases, fogs or vapors.
The device can be mounted in explosive hazardous areas, where devices of category 1 resp. 1/2 are
required. Devices of category 1 resp. 1/2 may be operated in hazardous explosive areas that require
apparatus of category 1 only if atmospheric conditions are present (pressure from 0,8 bar to 1,1 bar).
If the device is operated beyond these atmospheric conditions, the EU type examination certificate can
be used as a guide. Additional tests for the special application conditions are recommended. Devices
of category 1 resp. 1/2 must be connected to intrinsically safe circuits of protection level ia.
The device can be mounted in explosive hazardous areas, where devices of category 2 are required.
Devices of category 2 can be connected to intrinsically safe circuits of protection level ib.
The intrinsically safe signal and supply circuits safe galvanically separated from parts, which can be
connected with earthing potential.
The PA connection in the connector resp. the cable shield resp. the process connection must be
connected with the potential compensation of the explosion hazardous area.
At the chargeable plastic parts of the device like plug or cable, there is a danger of ignition by
electrostatic discharges. The operator has to ascertain the suitability of this equipment for his use.
A
warning marking points out to the safety measures, which must be applied because of the electrostatic
charging in operation and especially in the case of maintenance activities:
•
avoid friction
•
no dry cleaning
•
no assembling in pneumatic conveying stream
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