Description of the device
3.3 TP ports (twisted pair)
SCALANCE X005 / X005TS
14
Operating Instructions, 07/2014, C79000-G8976-C344-01
Auto polarity exchange
If the pair of receiving cables is connected incorrectly (RD+ and RD- interchanged), the
polarity is adapted automatically.
Note
The SCALANCE X005 and SCALANCE X005TS IE switches are plug-and-play devices that
require no settings during commissioning.
MDI / MDI-X autocrossover function
With the MPI/MDI-X autocrossover function, the send and receive contacts of an Ethernet
port are assigned automatically. The assignment depends on the cable with which the
communications partner is connected. This means that it does not matter whether the port is
connected using a patch cable or crossover cable. This prevents malfunctions resulting from
mismatching send and receive lines. This makes installation much easier for the user.
The SCALANCE X005 and SCALANCE X005TS devices support the MDI / MDI-X
autocrossover function.
Insulation between the TP ports
There are two TP port groups:
Group 1: P1
Group2: P2 to P5
Between ports of different port groups, an insulation voltage of 1.5 kV is adhered to
(corresponds to IEEE802.3, Chapter 33.4.1.1, Environment B), e.g. between P1 and P2.
The requirements for Environment A are met between ports of the same group, e.g. between
P2 and P5.
NOTICE
Setting ports with a fixed configuration
Ports of partner stations with a fixed configuration must be set to 100 Mbps/ half duplex or
10 Mbps half duplex.
NOTICE
Formation of loops
Note that the direct connection of two ports or accidental connection over several switches
causes an illegal loop that can cause network overload and failure.
