Operating instructions

Installation and maintenance
4.2 Connecting
Industrial Ethernet SCALANCE X-100 and SCALANCE X-200 Product Line
Operating instructions, 09/2006, A5E00349864 Release 7
4-5
4.2 Connecting
4.2.1 Power supply
Power supply
The power supply is connected using a 4-pin plug-in terminal block.
Exception:
The power supply of the SCALANCE X208PRO is connected using a 4-pin a-coded M12
socket.
The power supply can be connected redundantly. Both inputs are isolated. There is no
distribution of load. When a redundant power supply is used, the power supply unit with the
higher output voltage supplies the device alone. The power supply is connected over a high
resistance with the enclosure to allow an ungrounded set up. The two power supplies are
non-floating.
Table 4-1 Pin assignment
Pin number Pinout
(exception SCALANCE X208PRO)
SCALANCE X208PRO
Pin 1 L1+ 24 V DC L1 24 V DC
Pin 2 M1 n. c.
Pin 3 M2 Ground
Pin 4 L2+ 24 V DC n. c.