WAGO-I/O-SYSTEM 750
System Description
39
750-880, 750-880/025-000 ETHERNET Programmable Fieldbus Controller
Manual
Version 1.0.1
3.7.3
Grounding Protection
For the field side, the ground wire is connected to the lowest connection terminals
of the power supply module. The ground connection is then connected to the next
module via the Power Jumper Contact (PJC). If the bus module has the lower
power jumper contact, then the ground wire connection of the field devices can be
directly connected to the lower connection terminals of the bus module.
Note
Re-establish the ground connection when the connection to the power jumper
contacts is disrupted!
Should the ground conductor connection of the power jumper contacts within the
node become disrupted, e. g. due to a 4-channel bus terminal, the ground
connection will need to be re-established.
The ring feeding of the grounding potential will increase the system safety. When
one bus module is removed from the group, the grounding connection will remain
intact.
The ring feeding method has the grounding conductor connected to the beginning
and end of each potential group.
Figure 18: Ring-feeding
Note
Observe grounding protection regulations!
You must observe the regulations relating to the place of assembly as well as the
national regulations for maintenance and inspection of the grounding protection.
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