ABB Symphony Harmony Series, Instructions Manual

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WBPEEUI210509A0 1 - 1
Section 1
Introduction
Overview
The Modular Power System III (MPSIII) supplies 5 VDC,
15 VDC, -15 VDC, 24 VDC, 48 VDC, and 125 VDC power to
Harmony Rack components of Symphony Enterprise Manage-
ment and Control Systems. A single power chassis system
consists of a power chassis, two power supply trays, a power
entry panel (PEP), a fan assembly, and a DC bus monitoring
assembly. A dual power chassis system consists of two power
chassis, four power supply trays, a PEP, a fan assembly, and a
DC bus monitoring assembly.
NOTE:
The 24 VDC supply is nominally 25.5 VDC; however, throughout this
instruction it is referred to as the 24 VDC supply.
The MPSIII system is designed to operate with 2N power
redundancy. It directly accepts 120 VAC, 240 VAC, and
125 VDC inputs with no switches or jumpers to set.
Intended User
This instruction is intended for engineers, technicians, and
system designers as a source of technical information on the
MPSIII system. It should be used by those installing, operat-
ing, troubleshooting, maintaining, and replacing the system or
system components.
Personnel working with the power system should:
•
Have experience working with AC and DC power.
•
Know what safety precautions to take when working with
AC and DC power.
•
Have experience and knowledge of working with basic elec-
tronic test equipment.
•
Have training in and experience working with electrical
and electronic principles.