Operating instructions

Product properties
3.8 SCALANCE X208PRO
Industrial Ethernet SCALANCE X-100 and SCALANCE X-200 Product Line
Operating instructions, 09/2006, A5E00349864 Release 7
3-21
3.8.2 SCALANCE X208PRO M12 Industrial Ethernet ports
Connector pinout
On the SCALANCE X208PRO, the Industrial Ethernet ports are implemented according to
the PROFINET standard as 4-pin M12 sockets, d-coded with the MDI-X assignment
(Medium Dependent Interface-Autocrossover) of a network component.
Figure 3-10 SCALANCE 208PRO Ethernet socket M12
Table 3-11 Pin assignment
Pin number Assignment as a network component
Pin 1 RX+
Pin 2 TX+
Pin 3 RX-
Pin 4 TX-
Notice
With IE FC cable and IE M12 Plug PRO, an overall cable length of up to 100 m is permitted
between two devices depending on the cable type.
Autonegotiation
Autonegotiation means the automatic detection of the functionality of the port at the opposite
end. Using autonegotiation, repeaters or end devices can detect the functionality available at
the port of a partner device allowing automatic configuration of different types of device. With
autonegotiation, two components connected to a link segment can exchange parameters
and set themselves to match the supported communication functionality.