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en06000519-2.vsd
IEC06000519 V2 EN-US
Figure 230: Direct fibre optical connection between two IEDs with LDCM
The LDCM can also be used together with an external optical to galvanic G.703
converter as shown in figure
231. These solutions are aimed for connections to a
multiplexer
, which in turn is connected to a telecommunications transmission network
(for example PDH).
Telecom. Network
*) *)
Multiplexer Multiplexer
en05000527-2.vsd
*) Converting optical to galvanic G.703
IEC05000527 V2 EN-US
Figure 231: LDCM with an external optical to galvanic converter and a multiplexer
When an external modem G.703 is used, the connection between LDCM and the
modem is made with a multimode fibre of max. 3 km/2 mile length. The IEEE/ANSI
C37.94 protocol is always used between LDCM and the modem.
21.1.3 Setting guidelines
M12454-3 v6
64 kbit and 2 Mbit mode common settings
1MRK 511 401-UUS A Section 21
Remote communication
Bay control REC670 2.2 ANSI 597
Application manual
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