Surge protection
5981_en_06
PHOENIX CONTACT
35
5
Surge protection
Overvoltage can occur as a result of circuit events or lightning strikes. Safety equipment
against overvoltage should always be installed when installing the field multiplexer, as this
is required by the usual fields of application of the field multiplexer.
Field multiplexer systems used outdoors (e.g., for monitoring and control of a sewage
treatment plant) are exposed to increased risk of indirect effects of lightning. field
multiplexer systems used within industrial plants must also ensure the function and the
security of data transmission even in electromagnetically unfavorable circumstances.
Safety measures are therefore strongly recommended.
Correct installation and assembly can minimize electromagnetic interference. Particular
attention should be paid to the cable layout, described in Section “Transmission over
copper cable” on page 67. Rules for laying the remote bus cable are also given there.
Attention must also be paid to appropriate grounding and shielding measures (see Section
“Grounding” on page 16 and Section “Shielding” on page 24).
The following section should be considered as a general guide. If you require information
about comprehensive surge protection design, please contact Phoenix Contact.
Before assembling a field multiplexer system, check the surroundings for interference,
and select a suitable location.
Install additional modules (e.g., interface converters, surge arresters) as close as possible
to the field multiplexer head station.
Overvoltage protection measures include the following points:
–
Protecting the remote bus cable
–
Protecting the power supply and the entire control cabinet
Surge protection for the remote bus cable does not apply when fiber optics operation is
used. No other surge arresters are affected by the choice of the transmission medium. The
interface converter must also be included in the overvoltage protection measures.
Summary of Contents for 2861205
Page 1: ...User manual Configuring and installing the Inline field multiplexer...
Page 6: ...IB IL 24 MUX MA PAC 6 PHOENIX CONTACT 5981_en_06...
Page 26: ...IB IL 24 MUX MA PAC 26 PHOENIX CONTACT 5981_en_06...
Page 64: ...IB IL 24 MUX MA PAC 64 PHOENIX CONTACT 5981_en_06...
Page 86: ...IB IL 24 MUX MA PAC 86 PHOENIX CONTACT 5981_en_06...