X-300 Product Group - Siemens SCALANCE X-300 Series Operating Instructions Manual

Note
Device variants
There are devices with one power supply unit or with two power supply units. Depending on the
variant, the data cable outlet can be on the front or at the rear of the device.
Connecting 24 V safety extra-low voltage (SELV)
● 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 IE Switch X-300 alone.
● The power supply is connected over a high resistance with the enclosure to allow an
ungrounded set up. The two power inputs are non-floating.
Terminal block assignment (4-pin)
Table 6-1
Pin number
Pin 1
Pin 2
Pin 3
Pin 4
6.6.1.2

X-300 product group

Table 6-2
Device
X304-2FE
X306-1LD FE
X307-3
X307-3LD
X308-2
X308-2LD
SCALANCE X-300
Operating Instructions, 11/2019, A5E01113043-24
Pinout of the 24 V safety extra-low voltage (SELV)
Assignment
L1+ 24 V DC
M1
M2
L2+ 24 V DC
24 to 48 VDC safety extra-low voltage overview
Device version
(power supply)
1 x 24 VDC
1 x 24 VDC
1 x 24 VDC
1 x 24 VDC
1 x 24 VDC
1 x 24 VDC
Connecting
6.6 Power supply
Labeling (example)
24 V safety extra-low voltage (SELV)
can be connected redundantly
●
●
●
●
●
●
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