Phoenix Contact 2861205, User Manual

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IB IL 24 MUX MA-PAC
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PHOENIX CONTACT 5981_en_06
Figure 5-6 Protecting the power supplies
5.3 Surge protection measures in fiber optic mode
Since optical fibers are not sensitive to electromagnetic fields, field multiplexers that
transmit data over fiber optics do not need remote bus surge protection. Nonetheless, the
power supply unit for the interface converter should be included in the surge protection
scheme. Because of the mechanical sensitivity of fiber optics, only fiber types with a strong
cladding around the transmission medium should be used.
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Applicable fiber optic types can be found in the INTERFACE catalog from
Phoenix Contact.