SARA-N2 / N3 series - System integration manual
UBX-17005143 - R13
Design-in
Page 71 of 95
C1-Public
2.12
Integration in devices intended for use in potentially
explosive environments
2.12.1
General guidelines
SARA-N211 and SARA-N310 modules are certified as components intended for use in potentially
explosive atmospheres (see section
and see the “
Approvals
” section of the SARA
-N2 series data
for further details), with the following marking:
•
II 1G Ex ia IIC
for SARA-N211 modules
•
II 1G Ex ia IIC Ga
for SARA-N310 modules
According to the marking stated above, the modules are certified as electrical equipment of:
•
G
roup “II”: intended for use in areas with explosive gas atmosphere other than mines
susceptible
to firedamp.
•
C
ategory “1G”: intended for use in zone 0 hazardo
us areas, in which an explosive atmosphere is
caused by mixtures of air and gases, or when vapors or mists are continuously or frequently
present for long periods. The modules are also suitable for applications intended for use in zone 1
and zone 2 hazardous areas.
•
L
evel of protection “ia”: intrinsically safe apparatus with very high level of protection,
not capable
of causing ignition in normal operation and with the application of one countable fault or a
combination of any two countable fault plus those non-countable faults which give the most
onerous condition.
•
S
ubdivision “IIC”: intended for use in areas where the nature of the explosive gas atmosphere is
considered very dangerous based on the Maximum Experimental Safe Gap or the Minimum
Ignition Current ratio of the explosive gas atmosphere in which the equipment may be installed
(typical gases are hydrogen, acetylene, carbon disulfide), so that the modules are also suitable for
applications intended for use in subdivision IIB (typical gases are ethylene, coke oven gas and other
industrial gases) and subdivision IIA (typical gases are industrial methane, propane, petrol and the
majority of industrial gases).
•
Equipment protection level
“
Ga
”
: equipment for explosive gas atmospheres, having a very high
level of protection, which is not a source of ignition in normal operation, during expected
malfunctions or during rare malfunctions
The temperature range of the modules is defined in the “Operating temperature range”
section of the
and the SARA-N3 series data sheet
The modules are suitable for temperature class T4 applications, as long as the maximum input power
•
does not exceed 2.0 W
on SARA-N211 modules
•
does not exceed 1.85 W on SARA-N310 modules
Even if the modules are certified as components intended for use in potentially explosive atmospheres
as described above, the application device that integrates the module must be approved under all the
certification schemes required by the specific application device that will be deployed in the market
as apparatus intended for use in potentially explosive atmospheres.
The certification scheme approvals required for the application device integrating the module,
intended for use in potentially explosive atmospheres, may differ depending on the following topics:
•
the country or the region where the application device must be deployed
•
the classification of the application device relative to the use in potentially explosive atmospheres
•
the classification of the hazardous areas in which the application device is intended for use
