Connecting Up; Power Supply - Siemens SIMATIC NET SCALANCE X-100 Series Operating Instructions Manual

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