SARA-N2 series - System Integration Manual
UBX-17005143 - R06
Design-in
Page 52 of 82
2.11
SARA-N211 integration in devices intended for use in
potentially explosive atmospheres
2.11.1
General guidelines
SARA-N211 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 Sheet
for further details), with the following marking:
Ex II 1G, Ex ia IIC
According to the marking stated above, SARA-N211 modules are certified as electrical equipment of:
group “II”: intended for use in areas with explosive gas atmosphere other than mines susceptible
to firedamp.
category “1G”: intended for use in zone 0 hazardous areas, in which an explosive atmospheres is
caused by mixtures of air and gases, or when vapours 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.
level 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.
subdivision “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 disulphide), 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).
The temperature range of use of SARA-N211 modules is defined in the “Operating temperature range”
section of the SARA-N2 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.
Even if SARA-N211 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 SARA-N211 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 in relation to the use in potentially explosive
atmospheres
the classification of the hazardous areas in which the application device is intended for use
☞
Any specific applicable requirement for the implementation of the apparatus integrating SARA-
N211 module, intended for use in potentially explosive atmospheres, must be fulfilled according to
the exact applicable standards: check the detailed requisites on the pertinent norms for the
application, as for example the IEC 60079-0
