Connectors For The Power Supply Of The Scalance W786 - Siemens SCALANCE W786-xPRO Operating Instructions Manual

4.4

Connectors for the power supply of the SCALANCE W786

Possible power supplies
The following power supplies are suitable for the SCALANCE W786:
● 48 V DC direct voltage
● 12 - 24 V DC direct voltage
● 110 - 230 V DC direct voltage
● Power over Ethernet (PoE)
Procedure for connecting the supplied connector for 48 V DC
Figure 4-4
Perform the following steps to connect a 48 V DC cable to a SCALANCE W786:
1. Connect the supplied connector to the 48 V DC cable. The figure above shows the
SCALANCE W786-xPRO
Operating Instructions, Release 08/2007, C79000-G8976-C221-02
Use the two-pin connector supplied with the SCALANCE W786.
Use the power supply adapter 12 - 24 V DC available as an accessory.
Use the power supply adapter 110 - 230 V DC available as an accessory.
If an eight-wire Ethernet cable is used, it is possible to supply power over the four wires
that are not used as data lines. As an alternative, the voltage can be modulated onto the
data lines ("phantom power").
If a Fast Connect Ethernet connector is used to allow cable assembly in the field and due
to its greater mechanical strength, you can only use four-wire cables. In this case, only
phantom power is possible. This does not represent a restriction for the user because
PoE-compatible power equipment always provides both options.
DC 48 V
Position of the opening in the housing for the power supply with the housing cover
removed
location of the socket in the housing and the contact assignment. The connector is safe
against polarity reversal and can only be inserted in the right-hand half of the housing
When connecting the cores, you should therefore make sure that the connector is
oriented as shown in the following figure.
4.4 Connectors for the power supply of the SCALANCE W786
Connecting up
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