Electrical Isolation: Other - GE VersaPoint IC220PBI002 User Manual

Electrical isolation: Other

Other electrical isolation depends on how the supply voltages are provided. For
instance, electrical isolation can be provided by inserting a new 24V supply using a
power terminal. During this process the 24V power supply units must not be
connected to one another. One method of electrical isolation using a power
terminal is illustrated below. Connection between the ground of a supply voltage
(U or U ) and functional earth ground should only be made at one point within the
S M
station (point A). If a number of grounds are connected to the functional earth
ground, the electrical isolation is lost.
Electrically isolated areas within the station:
GFK-1911B Chapter 5 Power for the Station
Profibus NIU
1 Bus logic of the station
2 Isolated I/O
3 Isolated I/O
I/O Power Terminal I/O
IC220PWR001
( A )
5
5-11