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Guidance and Manufacturer’s Declaration – Electromagnetic Immunity (continued)
The IO-
α
is intended for use in the electromagnetic environment specified below. The customer
or the user of the IO-
α
should assure that it is used in such an environment.
Immunity Test
IEC 60601 Test
Level
Compliance
Level
Electromagnetic Environment –
Guidance
Portable and mobile RF
communications equipment should be
used no closer to any part of the IO-
α,
including cables, than the
recommended separation distance
calculated from the equation applicable
to the frequency of the transmitter.
Recommended separation distance
Conducted RF
IEC 61000-4-6
3 Vrms
150 kHz to 80 MHz
3 Vrms
𝑑𝑑
= 1.2
√𝑃𝑃
150 kHz to 80 MHz
Radiated RF
IEC 61000-4-3
3 V/m
80 MHz to 2.5 GHz
3 V/m
𝑑𝑑
= 1.2
√𝑃𝑃
80 MHz to 800 MHz
𝑑𝑑
= 2.3
√𝑃𝑃
800 MHz to 2.5 GHz
where
𝑃𝑃
is the maximum output
power rating of the transmitter in watts
(W) according to the transmitter
manufacturer and
𝑑𝑑
is the
recommended separation distance in
meters (m).
Field strengths from fixed RF
transmitters as determined by an
electromagnetic site survey,
a
should be
less than the compliance level in each
frequency range.
b
Interference may occur in the vicinity of
equipment marked with the following
symbol:
NOTE 1 At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE 2 These guidelines may not apply in all situations. Electromagnetic propagation is affected by
absorption and reflection from structures, objects and people.
a
Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones and
land mobile radios, amateur radio, AM and FM radio broadcast and TV broadcast cannot be predicted
theoretically with accuracy. To assess the electromagnetic environment due to fixed RF transmitters, an
electromagnetic site survey should be considered. If the measured field strength in the location in which
the IO-
α
is used exceeds the applicable RF compliance level above, the IO-
α
should be observed to verify
normal operation. If abnormal performance is observed, additional measures may be necessary, such as
re-orienting or relocating the IO-
α.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Summary of Contents for IO-A LED
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