Hardware Versions - ABB REF 54 Series Technical Reference Manual

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Technical Reference Manual, General
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The REF 54_ feeder terminal is part of the ABB Substation Automation system and
extends the functionality and flexibility of the concept further. This is possible due
to the modern technology applied both in hardware and software solutions.
Increased performance is achieved by utilizing the multiprocessor architecture.
Digital signal processing combined with a powerful CPU and distributed I/O
handling facilitates parallel operations and improves response times and accuracy.
The HMI including an LCD display with different views makes the local use of the
REF 54_ feeder terminal safe and easy. The HMI
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The family of REF 54_ feeder terminals contains several hardware versions.
Depending on the number of I/Os available, the product is called REF 541, REF 543
or REF 545, see following tables.
1. HMI is referred to as MMI in the relay and in the Relay Setting Tool
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instructs the user how to proceed.
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