Siemens SCALANCE W738-1 M12

Connection
6.3 Ethernet
SCALANCE W778-1 / W738-1
56 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 wir
e
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