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1MRK514019-UEN A
6.3.2
6.4
670 series 2.0 IEC
Installation manual
Connectors are generally color coded; connect blue or dark grey cable connectors to
blue or dark grey (receive) back-side connectors. Connect black or grey cable
connectors to black or grey (transmit) back-side connectors.
The fiber optical cables are very sensitive to handling. Do not bend too
sharply. The minimum curvature radius is 15 cm for the plastic fiber
cables and 25 cm for the glass fiber cables. If cable straps are used to
fix the cables, apply with loose fit.
Always hold the connector, never the cable, when connecting or
disconnecting optical fibers. Do not twist, pull or bend the fiber.
Invisible damage may increase fiber attenuation thus making
communication impossible.
Strictly follow the instructions from the manufacturer for each type of
optical cables/connectors.
Connecting remote communication interfaces LDCM
The Line Data Communication Module (LDCM) (see figure 19) is the hardware used
for the transfer of binary and analog signal data between IEDs in different protection
schemes on the IEEE/ANSI C37.94 protocol. The optical ports on the rear side of the
IED are X302, X303, X312, X313, X322 and X323. For location of the LDCM, refer
to section
"Rear side
connectors".
When the LDCM is used for binary signal exchange between IEDs in the same station
or even within the same panel, the fiber optic cables can be quite short (1-2 meters).
In such installation it is important to set the LDCM setting parameter OptoPower =
LowPower.
Connecting the galvanic X.21 line data
communication module
The Galvanic X.21 Line Data Communication Module (X.21 LDCM), see figure
is the hardware used for the transfer of binary and analog signal data between IEDs in
different protection schemes via telecommunication equipment, for example leased
telephone lines. For location of X-21 LDCM , refer to section
The galvanic X.21 line data communication module uses a ABB specific PC*MIP
Type II format.
Section 6
Connecting
19
"Rear side
connectors".
71
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