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Technical Reference Manual, General
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The bus communication protocol for the rear interface RS-232 (connector X3.2) is
selected via the “Protocol 2” setting parameter and the bus communication protocol
for the rear interface RS-485 (connector X3.3) is selected via the “Protocol 3”
setting parameter. These parameters can be modified by using the local menu
(
Communication/General)
or by using the Relay Setting Tool.
The following table shows supported parallel communication protocols on the front
and the rear connectors of the REF 54_ feeder terminals.
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The 9-pin D-type subminiature male connector (RS-232 connection) on the rear
panel connects the feeder terminal to the distribution automation system via the SPA
bus or the IEC_103. The fibre-optic interface module type RER 123 is used for
connecting the feeder terminal to the fibre-optic communication bus for SPA and
IEC_103 protocol.
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The 9-pin D-type subminiature connector (RS-485 connection) on the rear panel
connects the feeder terminal to the distribution automation system via the SPA bus
or the LON bus. The fibre-optic interface module type RER 103 is used to connect
the feeder terminal to the fibre-optic communication bus. The module RER 103
supports both SPA bus and LON bus communication.
The other communication parameters for the the rear interface RS-485 are set also
via the Communication menu.
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The optical connector on the front panel isolates the PC galvanically from the feeder
terminal. The front connector for the PC is standardized for ABB relay products and
requires a specific opto-cable (ABB art. No 1MKC950001-1). The cable is
connected to the serial RS-232 port of the PC. The other communication parameters
for the rear RS-485 interface are also set in the Communication menu of the REF
54_ feeder terminal.
The front panel is intended for the connection of a PC for configuring the feeder
terminal with the CAP 50_ tools. The front interface uses the SPA bus protocol. It
is also recommended that SPA protocol is used only with this connection.
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SPA (SMS)
LON
SPA
SPA (SMS)
SPA
-
IEC_103
LON (SMS)
SPA
IEC_103
SPA (SMS)
-
IEC_103
-
SPA
-
SPA
SPA
