Overcurrent protection of the power supply
Non-replaceable fuse
3 A / 32 V and
5 A / 125 V (PoE)
Redundant power supply unit No
Redundant power supply possible Yes
Table 8-73 Electrical data: Signaling contact
Voltage via signaling contact 24 VDC
Switching capacity (resistive load) max. 100 mA
Resistor between F1-F2 < 8 Ω
Table 8-74 Plug-in terminal block for connectors of the power supply and signaling contact
Power supply 1 x 4-pin male connector
Signaling contact 1 x 2-pin male connector
Table 8-75 Power over Ethernet at port P1, P2, P3, P4
PoE function within a power supply system According to IEEE 802.3af / 802.3at (type 1) for
environment A
Method of PoE power feed Alternative A
(refer to the following table for the pin assignment)
Reserved power per port 15.4 W at port,
of which the following can be used by the PD:
12.95 W
Overall power on all 4 ports Max. 30.8 W
Table 8-76 Electrical isolation
Between the ports No
Between ports and ground Yes
Between ports and 24 VDC power input Yes
Table 8-77 Pin assignment of the Ethernet ports of the SCALANCE PoE switch
Pin number / wire
1)
Assignment for data transmis‐
sion
Assignment for power transfer
(PoE).
Alternative A (MDI-X)
Pin 1 RX+ V-
Pin 2 RX- V-
Pin 3 TX+ V+
Pin 4 - -
Technical specifications
8.7 X-300M PoE technical specifications
SCALANCE X-300
Operating Instructions, 11/2019, A5E01113043-24 191
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