ABB DSTA180 57120001-ET/2 terminal plate
The software and hardware concept is based onmodularity. The software application tasks can be
organized in such a way as to be distributed over
different communication units (CMU boards).
This is possible due to an internal communication
concept that keeps all CMU boards informed about
the contents of the process data interface. There is
one process and system database which is available
in adapted copies for each CMU board.
The internal communication system ensures that
all process data are consistent. The different CMU
boards run the communication tasks for the
connected serial links. This allows the type and
number of different communication links running
on one CMU board to be defined.System perfor mance is defined by the configuration of the CMU
boards.
Communication
The RTU560 has a highly flexible capacity for
adaptation to telecontrol communication proto cols.Due to the standardized internal interface for
system and process information,the integration of
a new protocol is mainly oriented towards the new
protocol component.

The RTU560 is able to communicate with different
hierarchical levels of a network control system,
with subordinated RTUs or any other intelligent
electronic devices (IEDs),or with the test and diagnostic system.
The most important standard protocols supported
by RTU560 for communication with the control
system are:
• IEC 60870-5-101
• IEC 60870-5-104
• DNP 3.0 (also on ethernet)
• Modbus
• RP 570/71
• Indactic 23/ 33/ 35
• TG 800
• Sinaut 8FW
• Conitel 300
For communication with subordinated RTUs and IEDs such as protection
relays,local control units,etc.,the following protocols,among others,are
available:
• IEC 60870-5-101
• IEC 60870-5-102
• IEC 60870-5-103
• IEC 60870-5-104
• DNP 3.0
• SPA-Bus
• Modbus
• RP570/71
• Indactic 21
The connection of the respective
communication lines can be carried
out in several ways:
• Direct links with RS 232-C interfaces
(local communication)
• Voice-frequency telegraphy over leased telecommunication lines,private lines with narrow
bandwidth modems or power line carriers
• Radio links
• Dial-up modem
• Fiber-optic cables
• Digital communication networks
Redundancy
For energy transmission and distribution networks
it is important to maintain the access to stations.
RTU560 manages this requirement by providing
a sophisticated redundancy concept offering the
following features:
• Redundant communication lines or links
• Redundant communication units (CMU)
• Redundant Power Supply