Siemens eWON4002 - Manual (Page 29)

eWON4002™
Installation Guide
page 26 of 35
ver 2.04
When cabling over long distance, you have to take care of the twisted pairs. This means that along with the above
cabling conventions, the emission (TX+/TX-) and reception (RX+/RX-) signals have to be connected on the same
twisted pair:
Pins 4, 5, 7 and 8 do not have to be connected. The following picture shows the twisted pair connections:
Figure 15: Crossed cable cabling
9.2.2 Connection over hub/router
If the eWON® is connected to a hub, it has to be connected like any other device, with a straight cable. Again, the
wiring is as shown on the following picture, and care should be taken to keep the RX and TX signals on twisted
pairs:
TX+: pin3, TX-: pin6 Twisted pair 1
RX+: pin1, RX-: pin2 Twisted pair 2
Hub/Router
Straight
cable
Straight
cable