Ublox TOBY-L2 series, System Integration Manual

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TOBY-L2 and MPCI-L2 series - System Integration Manual
UBX-13004618 - R28 Design-in Page 125 of 164
2.15.2 ESD immunity test of TOBY-L2 and MPCI-L2 reference design
Although EMC / ESD certification is required for customized devices integrating the TOBY-L2 and
MPCI-L2 series modules for European Conformance CE mark, EMC certification (including ESD
immunity) has been successfully performed on TOBY-L2 and MPCI-L2 series modules reference
design according to European Norms summarized in
Table 45 .
The EMC / ESD approved u-blox reference designs consist of a TOBY-L2 and MPCI-L2 series module
installed onto a motherboard which provides supply interface, SIM card and communication port.
External LTE/3G/2G antennas are connected to the provided connectors.
Since external antennas are used, the antenna port can be separated from the enclosure port. The
reference design is not enclosed in a box so that the enclosure port is not identified with physical
surfaces. Therefore, some test cases cannot be applied. Only the antenna port is identified as
accessible for direct ESD exposure.
Table 46 reports the u-blox TOBY-L2 and MPCI-L2 series reference designs ESD immunity test
results, according to test requirements stated in CENELEC EN 61000-4-2 [18] , ETSI EN 301 489-1 [19] ,
ETSI EN 301 489-52 [20] .
Category Application Immunity Level Remarks
Contact Discharge
to coupling planes
(indirect contact discharge) Enclosure +4 kV / -4 kV
Contact Discharges
to conducted surfaces
(direct contact discharge) Enclosure port Not Applicable Test not applicable to u-blox reference design
because it does not provide enclosure surface.
The test is applicable only to equipment providing
conductive enclosure surface.
Antenna ports +4 kV / -4 kV Test applicable to u-blox reference design because
it provides antennas with conductive & insulating
surfaces.
The test is applicable only to equipment providing
antennas with conductive surface.
Air Discharge
at insulating surfaces Enclosure port Not Applicable Test not applicable to the u-blox reference design
because it does not provide an enclosure surface.
The test is applicable only to equipment providing
insulating enclosure surface.
Antenna ports +8 kV / -8 kV Test applicable to u-blox reference design because
it provides antennas with conductive & insulating
surfaces.
The test is applicable only to equipment providing
antennas with insulating surface.
Table 46: Enclosure ESD immunity level of u-blox TOBY-L2 and MPCI-L2 series modules reference designs
☞
TOBY-L2 and MPCI-L2 reference design implement all the ESD precautions described in section
2.15.3 .
2.15.3 ESD application circuits
The application circuits described in this section are recommended and should be implemented in the
device integrating TOBY-L2 and MPCI-L2 series modules, according to the application device
classification (see ETSI EN 301 489-1
[19] ), to satisfy the requirements for ESD immunity test
summarized in Table 45 .