Siemens EK 746 Series Instrucciones de operaciones descargar pdf (Pagina 43)

Connecting up

SCALANCE W788-xPRO / W74x-1PRO/RR

A5E02280448-02, Release 11/2008

Cabling for power supply and Ethernet

Suitable cables

The following cables are available for connecting a SCALANCE W788-xPRO/RR or

SCALANCE W74x-1PRO/RR to the power supply and Ethernet:

● IE hybrid cable 2 x 2 + 4 x 0.34 (order no. 6XV1870-2J)

The two data wire pairs are separately shielded. This cable is particularly suitable

for assembly with the IE IP 67 hybrid connector.

● IE FC TP standard cable 4 x 2 GP (order no. 6XV1870-2E)

In these cable types, two wires are twisted. All four pairs of wires are inside a

common shield.

● 2 x 2 IE cable, the optional power supply (18 - 48 V DC) is over M12 connectors.

Cable selection and interference exposure

A decisive factor in the selection of a cable type is the electromagnetic interference to

which the current lines between the power supply and the FC RJ-45 modular outlet

are subjected. Due to the separate shielding of the data wires, such interference has

less effect on the data transmission on a hybrid cable than on TP standard cable or

TP flexible cable.

AB C

Figure 4-3 Wiring a SCALANCE W788-xPRO/RR with electromagnetic

interference between the power supply and modular outlet

A power supply

B FC RJ-45 modular outlet with power insert

C SCALANCE W788-xPRO/RR

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Siemens EK 746 Series Instrucciones de operaciones Pagina 43