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European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH www.e2s.com Tel: +44 (0)208 743 8880
Document No. D202-00-501-IS
Issue 1 28-01-2024 Sheet 3 of 9
4) Zones, Gas Group, Category and
Temperature Classification
The units can be installed in locations with the following conditions:
Area Classification Gas
Zone 0
Explosive gas air mixture continually present in normal
operation.
Zone 1
Explosive gas air mixture likely to occur in normal
operation.
Zone 2
Explosive gas air mixture not likely to occur in normal
operation, and if it does, it will only exist for a short time.
Gas Groupings
Group IIA
Propane
Group IIB
Ethylene
Group IIC
Hydrogen and Acetylene
Temperature Classification for Gas Applications
T1 450
o
C
T2 300
o
C
T3 200
o
C
T4 135
o
C
T5
100ºC (GNExCP7-BG-I) only
T6
85ºC (GNExCP7-BG-I) only
Equipment Category
1G
Equipment Protection Level
Ga, Gb, Gc
Ambient Temperature Range
-55°C to +70°C (-67°F to +158°F) ATEX/IECEx/UKEx
IP Rating
IP66 to EN60529
4 / 4X / 3R / 13 to UL50E / NEMA250
5) Specific Conditions for Safe Use
The equipment has a maximum capacitance of 6.33pF.
The equipment does not provide 500V isolation between the
intrinsically safe circuit and parts which may be earthed. This
shall be considered in the end-use application to ensure the
possibility of an earth connection will not compromise intrinsic
safety.
Use galvanically isolating barriers or ensure that the
installation is equipotentially bonded such that earth loops
can not occur.
Refer to EN/IEC 60079-14.
Equipment is permitted to be wall mounted only in vertical
position. The enclosure base is permitted in two mounting
positions, with the double entry lowermost or uppermost.
Fig 1 Wall Mounting
6) Location and Mounting
The location of the call point should enable ease of access
for operation and testing. The unit should be mounted using
the 4 off fixing holes which will accept up to M5 sized fixings.
They should only be fixed to services that can carry the
weight of the unit.
To gain access to the mounting holes in the base the front
cover must be removed. See Section 7
.
Fig. 1 View of base unit showing fixing centres (in mm).
7) Access to the Enclosure
To access the chamber, remove the four off M6 x 60 hexagon
socket head screws and carefully withdraw the cover.
Once the screws are removed the cover will hang down out
of the way to gain access to the terminals, the internal earth
terminal and mounting hole recesses.
Warning –
Hot surfaces. External surfaces
and internal components may be hot after
operation, take care when handling the
equipment.
Warning – High voltage may be present,
risk of electric shock. DO NOT open
when energised, disconnect power
before opening.
