OVERVIEW
I-E96-506B1 1 - 1
SECTION 1 - INTRODUCTION
OVERVIEW
The INFI 90 AC modular power system provides +5, +15, -15
and +24 VDC to power process control modules and field ter-
mination devices.
The system consists of the power entry panel, fan assembly,
power modules and their mounting unit, bus bars and associ-
ated wiring. The power modules provide scalable power for
logic and I/O functions. The user has the option of selecting
N+1 power redundancy. In this type of redundancy, power
modules equally share output. If any power module fails, the
remaining power modules adjust their outputs to meet the
total system load. Therefore, redundancy can be provided by
one extra power module beyond the minimum number
required to power the system.
HARDWARE DESCRIPTION
Power Entry Panel
The power entry panel supplies line power to the system cabi-
net. There are three versions: IEPEP01, IEPEP02 and IEPEP03
Power Entry Panel. The IEPEP01 panel is the basic version. It
has surge protection and power fail interrupt detection; how-
ever, it does not have circuit breakers or DC voltage monitoring
capabilities. The IEPEP02 panel has one circuit breaker and is
identical to the IEPEP01 panel. The IEPEP03 panel has addi-
tional features.
The IEPEP03 panel transfers redundant power to the system
cabinet and monitors system status. It contains the AC trans-
fer module and the bus monitor module that perform these
functions. The AC transfer module monitors line voltage inputs
to the system cabinet, provides automatic AC line transfer (for
redundant AC lines) and generates a power fail interrupt (PFI)
signal. The bus monitor module monitors the power system
and provides status and customer alarm outputs.
Fan Assembly
The IEFAN01 and IEFAN02 fan assemblies provide air flow
cooling for the power modules and process control modules in
the system cabinet.
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