Electrical Isolation: Discrete Modules - GE VersaPoint IC220PBI002 User Manual

5

Electrical Isolation: Discrete Modules

Isolation of the I/O circuit of a discrete module from the communications power is
only ensured if a separate IC220PWR001 power terminal is used and the voltages
for the power terminal and the NIU are provided by isolated power supply units.
The 24V power supply units must not be connected to one another.
The power terminal interrupts all voltage jumpers from the previous terminal and
creates the voltage jumpers for the main circuit U , the segment circuit U and
M S
reference potential of the supply voltage GND. An example of this is shown below.
Example: Interruption/creation of the voltage jumpers with a power terminal
IC220PWR001
IC220PWR001
The areas hatched in the figure show the points at which the voltage jumpers are
interrupted.
GFK-1911B Chapter 5 Power for the Station 5-9