Power Supply; Isolation - WAGO I/O System 750 Series Manual

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The WAGO-I/O-SYSTEM 750

Power Supply

2.7 Power Supply

2.7.1 Isolation

Within the fieldbus node, there are three electrically isolated potentials.
• Operational voltage for the fieldbus interface.
• Electronics of the ECO coupler and the bus modules (internal bus).
• All bus modules have an electrical isolation between the electronics (inter-
Potential
Fieldbus interface
Fig. 2-10: Isolation
Attention
The ground wire connection must be present in each group. In order that all
protective conductor functions are maintained under all circumstances, it is
recommended that a ground wire be connected at the beginning and end of a
potential group. (ring format, please see chapter "2.8.3"). Thus, if a bus mod-
ule comes loose from a composite during servicing, then the protective con-
ductor connection is still guaranteed for all connected field devices.
When using a joint power supply unit for the 24 V system supply and the
24 V field supply, the electrical isolation between the internal bus and the
field level is eliminated for the potential group.
nal bus, logic) and the field electronics. Some analog input modules have
each channel electrically isolated, please see catalog.
Potential of the system supply
DC
DC
T 6,3 A
250 V
Potentials
in the field level
Electrical isolation
to the field level
per module
per channel
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WAGO-I/O-SYSTEM 750
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