Product description
4.2
Device Category According to ATEX Classification
Applies only within the EU and in countries in which the ATEX Directive (2014/34/EU) also applies. The
ATEX marking is located on the left outside of the casing.
4.2.1
Device category not intended for installation in an Ex-zone
Marking per ATEX with
II 2/- G IIA
Gas-carrying pipes with inflammable or explosive gas of explosion group IIA (e.g. biogas) may be
connected to the device at the appropriate point (zone 2 or 1 in the interior of the line). The device itself
has to be installed outside of a hazardous atmosphere.
4.2.2
Device category intended for installation in an Ex-zone 2
Marking per ATEX and IEC EN 60079 with
II 2/3 G Ex nA IIA T1 Gc X
Gas-carrying pipes with inflammable or explosive gas (zone 2 or 1 in the interior of the line) may be
connected to the device at the appropriate point. The device itself may be installed in zone 2 according to
the requirements laid out hereafter. The ignition protection type nA applies to the exterior of the device.
Electrical plug connections may only be removed when the power supply is disconnected. The interior
space is monitored by means of a gas warning device. The power supply of the device has to be de-
energized by suitable means (e.g. relay SIL 1 or two redundant relays connected in series) on reaching the
shutdown threshold and may only be switched on again when falling below the switch-on threshold.
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