EN 61000-4-2 ESD testing is performed on a metal test table using an ESD transient
generator. Level 4 testing involves injecting up to ±8kV contact discharges and up to
±15kV air discharges into the product under test. Depending on the product design,
discharges may be injected at the network connector, power connector and other
user-accessible areas. Under the test, proper operation continues with occasional
loss of a packet and infrequent device resets.
EN 61000-4-3 RF Susceptibility testing is generally performed in an RF-shielded
anechoic chamber. The product under test is placed on a non-conducting table in the
chamber, and antennas are used to subject the product to intense radio frequency
fields. Under the test, proper operation continues with occasional loss of a packet.
Level 2 testing is performed with a field of 3V/m, which is classified by the test
standard as a “moderate electromagnetic radiation environment.” Level 3 testing is
performed with a field of 10V/m, which is classified by the standard as a “severe
electromagnetic radiation environment.”
EN 61000-4-4 Burst testing is performed on a non-conducting table, with 1 meter of
the network cable clamped in a high-voltage burst generation apparatus. Under the
test, proper operation continues with occasional loss of a packet. There are three
bursts injected onto the network cable each second. Level 3 testing is performed
with ±1kV bursts, which are classified by the test standard as representative of a
“typical industrial environment.” Level 4 testing is performed with ±2kV bursts,
which are representative of a “severe industrial environment.”
EN 61000-4-5 Surge testing is performed on a non-conducting table using specialized
surge generation equipment. The surges are injected directly into the network
wiring via a coupling circuit. See figure 10 of EN 61000-4-5 (formerly figure 11 of
IEC 801-5). Under the test, proper operation continues with the occasional loss of a
packet. Level 2 testing is performed with up to ±1kV surges, and Level 3 testing is
performed with up to ±2kV surges.
For more information on levels and installation classes, see EN 61000-4-5. The applicable
surge test levels and coupling mode specified by EN 61000-4-5 can be found in table A.1 of
that specification, as follows:
• balanced
circuits/lines;
• coupling mode is line-to-ground, either polarity, the surge waveform is not
applied differentially;
• surge waveform is from a 1.2µs /50µs open circuit and (8µs/20µs) short circuit
Combination Wave Generator (CWG)for classes 1-4.
EN 61000-4-6 Conducted RF Immunity testing is performed on a metal test table using an
RF signal generator, an RF power amplifier, and specialized “coupling-decoupling” network
(CDN) devices. A typical test setup for use with L
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network devices is shown in
figure 6.4. The test equipment drives a large common-mode noise voltage onto the twisted
pair cable that connects to the Equipment Under Test (EUT). The Auxiliary Equipment
(AE) must be able to continue communicating with the EUT during the test. The CRC error
rate for this communication should generally be less than 1%, indicating a negligible loss of
network functionality. During the test, the RF signal generator is set to an amplitude
modulation (AM) depth of 80%, and the frequency is slowly swept from 150kHz to 80MHz.
Level 2 testing, which represents a “light industrial environment,” is performed with an
injected common-mode voltage on the EUT’s network cable of 3Vrms (15.3Vp-p including
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LPT-11 Transceiver User’s Guide
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