User's Manual

SARA-G3 and SARA-U2 series - System Integration Manual
UBX-13000995 - R18 Advance Information Design-in
Page 163 of 206
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 2. The maximum average power of SARA-U270 ATEX, according to the WCDMA power class
stated in Table 3, is 250 mW.
The RF threshold power of the application device integrating a SARA-G340 ATEX, a SARA-G350 ATEX, a SARA-
U201 ATEX or a SARA-U270 ATEX module is defined, according to the IEC 60079-0 ATEX standard [35], as the
product of the effective output power of the module multiplied by the antenna gain (implemented/used on the
application device).
The RF threshold power of the application device integrating a SARA-G340 ATEX, a SARA-G350 ATEX, a SARA-
U201 ATEX or a SARA-U270 ATEX module, according to the IEC 60079-0 ATEX standard [35], must not exceed
the limits shown in Table 63.
Gas group II subdivision RF threshold power limits according to the IEC 60079-0 ATEX standard
IIA (a typical gas is propane)
6.0 W
IIB (a typical gas is ethylene)
3.5 W
IIC (a typical gas is hydrogen)
2.0 W
Table 63: RF threshold power limits for the different gas group II subdivisions according to the IEC 60079-0 ATEX standard [35]
The system antenna(s) implemented/used on the application device integrating SARA-G340 ATEX,
SARA-G350 ATEX, SARA-U201 ATEX module or SARA-U270 ATEX module 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 module does not exceed the limits shown in Table 63.