Connecting up
6.3 Ethernet
SCALANCE W788-x / W748-1
Operating Instructions, 03/2022, A5E03678333-17
53
Power over Ethernet (PoE)
With the SCALANCE W7x8, power supply using Power over Ethernet (PoE) is also
possible. The devices support the standards 802.3at type 1 (IEEE 802.3af) and IEEE
802.3at type 2.
•
Gigabit Ethernet
When you connect to gigabit Ethernet, the power supply is a phantom power supply
over data wires 1, 2, 3 and 6. This corresponds to alternative A according to IEEE
802.3af.
•
Fast Ethernet
On an 8-wire Fast Ethernet cable, the power is supplied via the free data wires 4, 5, 7
and 8. This corresponds to alternative B according to IEEE 802.3af.
Note
Disabling the PoE power supply
Before you pull a plug via which the device is supplied with power using PoE, disable the
relevant PoE power supply.
Note
No power sourcing equipment (PSE)
The W7x8 cannot be used as a PoE power supply for other devices.
6.3
Ethernet
For connection to Industrial Ethernet, the device has either an M12 interface or an RJ45
interface, depending on the device version:
The power can also be supplied via this interface (Power over Ethernet).
Connect the connector and socket. Make sure that they lock in place correctly. With the
M12 connector, tighten the knurled screw (torque 1 Nm).
6.4
Antenna connectors
Note
Tightening torque
The following tightening torques apply to the connectors:
•
with N-Connect connectors: 1.7 Nm
•
with SMA/R-SMA connectors: 1 Nm
