User`s guide

6-8
Table 6.2 IEC 801 Test Descriptions
IEC 801 Test Description Level
801-2 ESD Level 4
801-3 Radiated Susceptibility Level 2
801-4 Burst Level 4
801-5 Surge Level 1 (0.5kV)
Level 2 (1.0kV)*
Level 3 (2.0kV)*
* Level 2 or 3 surge immunity is only available with revision C03 or later LPT-10
transceiver, and requires external TVS protection.
IEC 801-2 ESD testing is performed on a metal test table using an ESD transient
generator
13
. Level 4 testing involves injecting 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. Normal product
operation should not be interrupted by the discharges, although one packet may be
corrupted on the network by each static discharge to the network connector or cable.
IEC 801-3 RF Susceptibility testing is generally performed in an RF-shielded anechoic
chamber
14
. 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. Normal
product operation should not be interrupted by the RF field, and normal network
communication should continue. 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."
IEC 801-4 Burst testing is performed on a non-conducting table, with 1 meter of the
network cable clamped in a high-voltage burst generation apparatus
15
. Normal
product operation should not be interrupted by the bursts, although one packet may be
corrupted on the network by each burst. 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."
IEC 801-5 Surge testing is performed on a non-conducting table using specialized surge
generation equipment
16
. The surges are injected directly into the network wiring via a
coupling circuit (see figure 11 of [16]). Normal product operation should not be
interrupted by the surges, although one packet may be corrupted on the network by each
surge. 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 Annex B.2 of [16]. The applicable surge test levels and coupling mode
specified by IEC 801-5 can be found in table A1 of [16] as follows:
• Symmetrically operated circuits/lines;
• Coupling mode is line-to-ground, either polarity;
• Surge waveform is 1.2/50µs (8/20µs) Combination Wave for Classes 1-4.