GE VersaPoint IC220PBI002, Руководство пользователя

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GFK-1911B Chapter 5 Power for the Station 5-3
5
The Logic Circuit: U
L
The logic circuit with communications power U
L
starts at the NIU. The logic circuit
is fed through all modules of a station. The logic circuit cannot be supplied via
another supply terminal.
Function: Logic Circuit U
L
Provides the communications power for all modules in
the station.
Voltage of U
L
7.5V
Generation of U
L
U
L
is generated from the main power U
M
of the NIU.
Current carrying capacity of U
L
2A, maximum. (See Summary of I/O Module Current
Consumptions at the end of this chapter).
The communications power is not electrically isolated
from the 24V input voltage for the NIU.
The Analog Circuit: U
ANA
Power for the analog modules (here also called analog voltage) U
ANA
is supplied at
the NIU. It is fed through all the modules in a VersaPoint station.
Function: Analog Circuit U
ANA
Provide power for analog modules
Voltage of U
ANA
24V.
Generation of U
ANA
U
ANA
is generated from the main power U
M
of the NIU.
Current carrying capacity of
U
ANA
0.5A, maximum. (See Summary of I/O Module Current
Consumptions at the end of this chapter).