ABB FENA-21 - 3 Overview of the Ethernet Network and the FENA-01;-11;-21 Module; Contents of this Chapter; Ethernet Network

Overview of the Ethernet network and the FENA-01/-11/-21 module 33
3
Overview of the Ethernet
network and the FENA-01/-11/-
21 module
Contents of this chapter
This chapter contains a short description of the Ethernet network
and the FENA adapter module.
Ethernet network
Ethernet standards support a variety of physical media (coaxial
cable, twisted pair, fiber optics) and topologies (bus and star). The
FENA-01/-11/-21 adapter module supports twisted pair as the
physical media in a star topology. In addition, FENA-21 supports a
daisy chain topology.
The maximum length for an Ethernet segment on twisted pair
media is 100 meters. All twisted pair media between the Ethernet
node and the switch or router must be shorter than 100 meters,
including media within patch panels. For more information, see
chapter Technical data.