31
Although transient suppression circuitry is present on Ethernet
RJ-45 port of REF 542plus, the high amplitude transients can
potentially damage the port and its link partners. It is
recommended to use RJ-45 ports only inside the switchgears or
inside environments sufficiently protected.
For the substation applications, it is not recommended to use RJ-
45 to interface to field devices across distances, which could
produce high levels of ground potential rise (that is greater than
2.5 kV) during the line to ground fault conditions.
Therefore, for the highest noise immunity requirements in industrial
applications, mixed topology solutions based both on twisted pairs and
optical connections (for longer distances and/or outside the switch gear)
would be better. See Section 6.3. Network topology and
Section 6.3.6. Integration within the switchgear for more information about
topologies.
The version of fiber optic cable to use depends on the required distance range.
Fiber optic distances up to 50 m (164.04 ft.) can be covered with plastic
optical fiber (POF) by using easy to operate polymer fiber technology. For
distances up to 100 m (328.08 ft.), HCS fiber, also easy to assemble, can be
used together with optical connection conforms to the F-SMA standard. If
longer distances are to be covered or if an existing glass fiber installation is
used, the glass fiber optic can normally cover transmission distances up to
3000 m (9842.52 ft.) by using multimode glass fiber HCS with connection
conforms to the ST® (B-FOC) standard.
ABB recommendation for Media Converters:
*
Phoenix Contact FL MC 10/100BASE-T/FO POF, FL MC 10/100BASE-
T/FO G850, and so on.
6.2.3.
Hubs
ABB recommendation for hubs:
*
Phoenix Contact FL HUB 10BASE-T can be used to expand a network
quickly and cost-effectively. It has four twisted pair ports. It can be used
together with other hubs to create a multi-port repeater with up to 20 ports.
*
The FL HUB AGENT version also has an agent, which can provide
comprehensive system diagnostics for all the connected ports.
1MRS755865
Multifunctional Protection and Switchbay
Control Unit
Installation Manual for Web Interface
Installation manual
REF 542plus
