SARA-G3 and SARA-U2 series - System Integration Manual
UBX-13000995 - R26
Design-in
Page 168 of 217
Any specific applicable requirement for the implementation of the apparatus integrating SARA-G340
ATEX, SARA-G350 ATEX, SARA-U201 ATEX or SARA-U270 ATEX 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 [34], IEC 60079-11
[35], IEC 60079-26 [36] standards.
The certification of the application device that integrates a SARA-G340 ATEX, a SARA-G350 ATEX, a
SARA-U201 ATEX or a SARA-U270 ATEX module and the compliance of the application device with all
the applicable certification schemes, directives and standards required for use in potentially explosive
atmospheres are the sole responsibility of the application device manufacturer.
The application device integrating a SARA-G340 ATEX, a SARA-G350 ATEX, a SARA-U201 ATEX or a
SARA-U270 ATEX module for use in potentially explosive atmospheres must be designed so that any circuit/part
of the apparatus shall not invalidate the specific characteristics of the type of protection of the module.
The intrinsic safety ‘i’ type of protection of SARA-G340 ATEX, SARA-G350 ATEX, SARA-U201 ATEX and
SARA-U270 ATEX modules is based on the restriction of the electrical energy within equipment and of the
interconnecting wiring exposed to the explosive atmosphere to a level below that which can cause ignition by
either sparking or heating effects.
The following input and equivalent parameters must be considered integrating a SARA-G340 ATEX, a
SARA-G350 ATEX, a SARA-U201 ATEX or a SARA-U270 ATEX module in an application device intended for use
in potentially explosive atmospheres:
Total internal capacitance, Ci
Total internal inductance, Li
The module does not contain blocks which increase the voltage (e.g. like step-up, duplicators, boosters, etc.)
The nameplate of SARA-G340 ATEX, SARA-G350 ATEX, SARA-U201 ATEX and SARA-U270 ATEX modules is
described in the ‘Product labeling’ section of the
SARA-G3 series
Data Sheet
[1] and the
SARA-U2 series
Data
Sheet
[2]. For additional information and modules’ certificate of compliancy for use in potentially explosive
atmospheres, see our website (www.u-blox.com) or contact the u-blox office or sales representative nearest you.
The final enclosure of the application device integrating SARA-G340 ATEX, SARA-G350 ATEX,
SARA-U201 ATEX or SARA-U270 ATEX modules, intended for use in potentially explosive atmospheres,
must guarantee a minimum degree of ingress protection of IP20.
2.14.2
Guidelines for VCC supply circuit design
The power supply ratings, average and pulse, must be considered in the design of the
VCC
supply circuit on the
application device integrating SARA-G340 ATEX, SARA-G350 ATEX, SARA-U201 ATEX or SARA-U270 ATEX
module, implementing proper circuits providing adequate maximum voltage and current to the
VCC
supply input
of the modules, according to the specific potentially explosive gas atmosphere category subdivision where the
apparatus is intended for use.
