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GE Energy
Familiarization
Introduction
Use this section to become familiar with the various components that make up a D20
or D200 system.
What are the
The D20 is a standalone remote terminal unit (RTU). It consists of one or more main
D20 and D200?
processor boards, peripheral I/O modules, termination panels, power supply, and
communication equipment.
These components, combined with software applications, form the D20 RTU
System.
The D20 acts as a data concentrator and central processor. Field data gathered
through the peripheral modules and external Intelligent Electronic Devices (IEDs)
are stored in the system database and can be accessed by the application programs
loaded into the D20.
The D20 design has horizontally mounted processor boards, with multiple boards in
some versions.
The D200 shares the same overall design concept as the D20 but it has vertically
mounted processor boards. The D200 can use multiple D20ME/ME II processor
boards, up to a maximum of eight nodes.
The D20 and D200 are available in a Kit form, for self-assembly, and as factory-
assembled RTUs.
Separate
Peripheral I/O boards operate independently of the main chassis and main
Peripherals
processors. This means that:
•
You can use a D20 or a D200 without direct connection to peripheral boards so
that it acts as a Master Data Concentrator to other RTUs.
•
You can hot-swap the peripherals without powering down the main processor.
Assembling a
Many add-on options are available for the D20 & D200 systems, to provide different
D20
operational performance and functions. Typically, the D20 and D200 systems will
consist of a Main Chassis with required Peripheral I/O boards.
General
Full
Installation and Operations Guide
994-0078-2.00-7
D20/D200
13
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