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Figure 6: In this circuit protection schematic for RS-485 busses in high exposure environments, the symbols can represent any number of overvoltage protection
solutions, including Q2L Series SIDACtor protection thyristors (Figure 7). (Source: Littelfuse)
Figure 7: Low-profile,
small-footprint protection
thyristors such as the Q2L
Series SIDACtor are designed
to protect high-density
broadband equipment from
damaging overvoltage
transients. (Source: Littelfuse)
LEARN MORE
Littelfuse PolySwitch
Telecommunication
Resettable PTCs
Conclusion
Although system designers spend most of their time
focused on the functionality of the communication
system (that supports their Factory Automation project),
it is important to not overlook the electrical threats
to which those systems will be exposed. As shown
here, Littelfuse offers a wide range of solutions for
the Ethernet, PoE, CAN bus and RS-485 data circuits
that will be used. For example, to learn more about
protecting Ethernet circuits and equipment in industrial
settings from ESD, lightning, power faults, and other
electrical transient threats, download a free copy of
the Ethernet Protection Design Guide from Littelfuse.
For help in choosing an appropriate fuse or TVS Diode
Array, visit here and sign up for a free Littelfuse iDesign
account. The iDesign platform guides you through
the process of choosing the best component for an
application, finding parts documentation, sharing
information with colleagues, and ordering part samples
for prototyping. ■
