Connection
6.3 Ethernet
SCALANCE W778-1 / W738-1
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Operating Instructions, 03/2022, C79000-G8976-C450-07
Note
"Phantom power" only with SCALANCE W778/W738
The device only supports the standard IEEE 802.3at/af Mode A. With this device, the
connection to Ethernet is only possible using four-wire cables. For this reason, no PSE
(Power Sourcing Equipment) can be used that only supplies the power via the free wire
pairs.
Ethernet cables with M12 connectors for the SCALANCE W788-x M12 (Gigabit Ethernet,
eight-wire) cannot be used for the SCALANCE W778/W738.
Note
No power sourcing equipment (PSE)
The device cannot be used as a PoE power supply for other devices.
6.3
Ethernet
For connection to Industrial Ethernet at 10/100 Mbps, the device has two M12
interfaces: D-coded, 4-pin.
Position and pin assignment
①
M12 interface P1
②
M12 interface P2
The power can also be supplied via this interface (Power over Ethernet).
The 4-pin connection socket has the following pin assignment:
Pin
Assignment
1
TX
2
RX
3
TX
4
RX
