SARA-G3 series - System Integration Manual
UBX-13000995 - R06 Objective Specification Design-in
Page 164 of 218
explosive atmospheres. Any specific applicable requirement for the VCC supply circuit design must be
fulfilled according to all the exact applicable standards for the apparatus.
Check the detailed requisites on the pertinent normatives for the application apparatus, as for
example the IEC 60079-0 [27], IEC 60079-11 [28], IEC 60079-26 [29] standards.
2.13.3 Guidelines for antenna RF interface design
The RF output power of the SARA-G350 ATEX modules transmitter is compliant to all the applicable
3GPP / ETSI standards, with a maximum output of 2 W RF pulse power and 1.15 mJ RF pulse energy
in 850/900 MHz bands and with a maximum output of 1 W RF pulse power and 0.58 mJ RF pulse
energy in the 1800/1900 MHz bands according to the GSM/GPRS power classes stated in Table 2Table
2.
The RF threshold power of the application device integrating a SARA-G350 ATEX module is defined,
according to the IEC 60079-0 ATEX standard [27], as the product of the effective output power of the
transmitter (the SARA-G350 ATEX module) multiplied by the antenna gain (implemented/used on the
application device).
The RF threshold power of the application device integrating a SARA-G350 ATEX module transmitter,
according to the IEC 60079-0 ATEX standard [27], must not exceed the limits shown in Table 40Table
40.
RF threshold power limits according to the IEC 60079-0 ATEX standard
IIA (a typical gas is propane)
IIB (a typical gas is ethylene)
IIC (a typical gas is hydrogen)
Table 40: RF threshold power limits for the different gas group II subdivisions according to the IEC 60079-0 ATEX standard [27]
The system antenna(s) implemented/used on the application device for SARA-G350 ATEX modules
must be designed/selected so that the antenna gain (i.e. the combined transmission line, connector,
cable losses and radiating element gain) multiplied by the output power of the transmitter (SARA-
G350 ATEX module) does not exceed the limits shown in Table 40Table 40.
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