SARA-N2 / N3 series - System integration manual
UBX-17005143 - R13
Design-in
Page 72 of 95
C1-Public
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Any specific applicable requirement for the implementation of the apparatus integrating the
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
, IEC 60079-11
standards.
☞
The certification of the application device that integrates the 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-N211 and/or SARA-N310 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-N211 and SARA-N310 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-N211 and/or
SARA-N310 module in an application device intended for use in potentially explosive atmospheres:
•
Total internal capacitance, Ci (see
•
Total internal inductance, Li (see
•
The module does not contain blocks which increase the voltage (e.g. like step-up, duplicators,
boosters, etc.)
The nameplate of the modules is described in the “Product labeling” section of
the SARA-N2 series
data sheet
and the SARA-N3 series data sheet
For additional info and modules’ certificate of
compliancy for use in potentially explosive atmospheres, see our website (
) or contact
the u-blox office or sales representative nearest you.
☞
The final enclosure of the application device integrating SARA-N211 and/or SARA-N310 modules,
intended for use in potentially explosive atmospheres, must guarantee a minimum degree of
ingress protection of IP20.
2.12.2
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-N211 and/or SARA-N310 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.
lists the maximum input and equivalent intrinsically safe parameters for the SARA-N211 and
the SARA-N310 modules, which must be considered in the sub-division IIC, IIB and IIA.
Parameter
SARA-N211
SARA-N310
Ui
4.2 V
4.2 V
Ii
0.5 A
0.5 A
Ci
68.1
µ
F
42.2
µ
F
Li
8.5
µ
H
11.4
µ
H
Table 26: Maximum input and equivalent parameters for sub-division IIC
