ABB Advant Controller 450 User Manual

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The stabilized 5 V supply is organized as n+1 parallel voltage regulator modules sharing the
load current. The n modules are required to meet the demand. The extra module gives what is
known as n+1 redundancy. In the event of a single failure, the full responsibility is bumplessly
taken over by the remaining equipment.
The n is equal to 1 in the standardized Advant Controller 450.
The 5 V supply is distributed as single supply to each module.
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You can duplicate the battery unit and the backup power supply. The main reason to duplicate is
to double the battery capacity.
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Processor module redundancy is available. In this case, the controller contains two processor
modules, each including memory for system and application software. One processor module is
acting as primary, the other is backup (hot stand-by). The primary processor module controls the
process. The backup stands by to take over in case of a fault in the primary. The changeover is
done bumplessly and in less than 25 ms. During the changeover, the process outputs are frozen.
Following a changeover, the system operates as a system without redundancy with only one
processor module in operation. You can replace the malfunctioning processor module while the
system is running. After the replacement is carried out, the system once again has a redundant
processor module.
If an error arises in the backup unit, you can also replace the backup unit while the system is
running.
Errors which occur in the backup unit can never affect the primary unit’s operation. The primary
unit and the backup unit are logically separated from one another.
Hardware errors in the primary processor module cause the system to perform a correct
changeover. These hardware errors are “single errors.”
The application programming and the communication are totally unaffected by the redundancy.

ABB Advant Controller 450 Specifications

General

Brand	ABB
Model	Advant Controller 450
Category	Controller
Language	English