Installation, connecting up, sources of problems
4.2 Connecting up
SCALANCE X-100
Operating Instructions, 04, A2B00060666D
45
4.2 Connecting up
4.2.1 Power supply
Power supply
The power supply is connected using a 4-pin plug-in terminal block.
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.
Figure 4-4 Power supply SCALANCE X-100
Figure 4-5 Terminal block, four-pin
Table 4- 1 Pin assignment for the power supply
Pin number Assignment
Pin 1 L1+ 24 V DC
Pin 2 M1
Pin 3 M2
Pin 4 L2+ 24 V DC
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