Communication Media
The communication takes place via direct fiber-optic connections, via communication networks or via 2-wire
copper conductors. Siemens recommends a direct fiber-optic connection, as this offers the highest transmis-
sion rate of 2 MBit/s and is immune to failures in the communication route while offering the shortest trans-
mission time. This also enables the transmission of a large amount of additional information on differential
protection routes and the remote control of devices at the remote end with DIGSI 5.
The distance to be bridged and the transmission paths available determine the settings of the protection inter-
face. External communication converters are used for the connection to communication networks via
G703.1-, X21-, or G703.6 interfaces. The connection to 2-wire copper cores also takes place via a communica-
tion converter. The C37.94 interface, for example, with 2 MBit/s, offers a direct fiber-optic connection to a
multiplexer with the corresponding interface.
show examples of communication connections.
In the case of a direct connection, the transmission distance depends on the fiber type of the optical fiber. This
distance can also be extended via external repeaters.
The modules in the device can be replaced from outside, so that adaptation to a transmission route is possible.
In the case of the 820-nm double module USART-AE-2FO with 2 channels, 2 protection interfaces can be oper-
ated on one module.
The modules can be located at slots E and F in the base device, and at slots N and P in the plug-in module
assembly with integrated power supply.
When using communication converters, the connection from the device to the communication converter by a
module is established via optical fibers.
Table 3-11
Plug-In Modules for Applications with the Protection Interface
Plug-In Modules
Module Type: USART-AF-1LDFO
Module Type: USART-AW-2LDFO
Module Type: USART-AG-1LDFO
Module Type: USART-AU-2LDFO
Module Type: USART-AK-1LDFO
Module Type: USART-AV-2LDFO
Module Type: USART-AH-1LDFO
4
Module Type: USART-AJ-1LDFO
5
Module Type: USART-AX-2LDFO
6
Module Type: USART-AY-2LDFO
7
Physical Connection
1 x optical serial, 1300 nm, duplex LC plug, 24 km via
9/125 μm singlemode optical fibers, 4 km via
62.5/125 μm multimode optical fibers
●
2 x optical serial, 1300 nm, duplex LC plug, 24 km via
9/125 μm singlemode optical fibers, 4 km via
62.5/125 μm multimode optical fibers
●
1 x optical serial, 1300 nm, duplex LC plug, 60 km via
9/125 μm singlemode optical fibers
●
2 x optical serial, 1300 nm, duplex LC plug, 60 km via
9/125 μm singlemode optical fibers
●
1 x optical serial, 1550 nm, duplex LC plug, 100 km
via 9/125 μm singlemode optical fibers
●
2 x optical serial, 1550 nm, duplex LC plug, 100 km
via 9/125 μm singlemode optical fibers
●
4
USART-AH-1LDFO only pairs with USART-AJ-1LDFO or USART-AY-2LDFO on the opposite side
5
USART-AJ-1LDFO only pairs with USART-AH-1LDFO or USART-AX-2LDFO on the opposite side
6
USART-AX-2LDFO only pairs with USART-AJ-1LDFO or USART-AY-2LDFO on the opposite side
7
USART-AY-2LDFO only pairs with USART-AH-1LDFO or USART-AX-2LDFO on the opposite side
System Functions
3.5 Protection Communication
102
SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017
Summary of Contents for 6MD85
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