8 Guidelines for electrical installation
8.2 Potential relationships
XI/ON: XNE-GWBR-2ETH-IP
09/2011 MN05002007Z-EN
www.eaton.com
187
8.2
Potential relationships
8.2.1
General
The potential relationship of a Ethernet system realized with XI/ON modules is characterized
by the following:
• The system supply of gateway and I/O-modules as well as the field supply are realized via
one power feed at the gateway.
• All XI/ON modules (gateway, power feeding and I/O-modules), are connected capacitively
via base modules to the mounting rails.
The block diagram shows the arrangement of a typical XI/ON station with the gateway
XNE-GWBR-2ETH-IP.
Figure 73:
Block diagram
of a XI/ON
station with
XNE-GWBR-
2ETH-IP
Switch
CPU
5 V
24 V
Eth1
Eth2
U
sys
Service
USB
U
L
Modulebus
Logik
Output
Logik
Intput
5
24
U
sys
U
L
Logik
Output
...
Bus
Refreshing
Gateway
...
U
L
Logik
Output
...
Power
Feeding