Connecting Remote Communication Interfaces Ldcm - Hitachi 670 Series Installation Manual

1MRK514026-UUS Rev. P
X304 (3A/3B) and X3061/X3062 (5A/5B) are to be used in pairs for redundant communication. The
optical port connectors are of LC type and the galvanic connectors are of RJ45 type.
• Optical ports X311 A and B on the SLM module are used for SPA, IEC 60870-5-103 or DNP3
communication. The port connectors are of ST (glass) or HFBR Snap in (plastic) type.
• Optical ports X311 C and D (Tx, Rx) on the SLM module are used for LON communication. The port
connectors are of ST (glass) or HFBR Snap in (plastic) type.
Optical fibers have Transmission (Tx) and Reception (Rx) connectors, and they should be attached to the
Tx and Rx connectors on the SLM module (Tx cable to Rx connector, Rx cable to Tx connector).
Connectors are usually 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.
6.3.2

Connecting remote communication interfaces LDCM

The Line Data Communication Module (LDCM) (see Figure 19) is used for transferring 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 X305, X306, X312, X313, X322 and X323.
When 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 (39-79 inches). With such an installation it is
important to set the LDCM parameter OptoPower = LowPower.
670 series
Installation manual
Fiber-optical cables are very sensitive to handling. Do not bend too sharply. The minimum
curvature radius is 5.9" for plastic fiber cables and 9.84" for glass fiber cables. If cable straps
are used to fix the cables, apply them with a 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 making
communication impossible.
RJ45 LAN ports of the IED are PELV or SELV circuits.
The connected remote circuit must be PELV or SELV circuits.
Ensure that the clearance distance accordance with national regulations, for the highest
voltage that may be present within the cabinet. This can be done by ensuring that the LAN
cables are mounted and fixed with sufficient distance to all HLV circuits.
During transportation of a relay mounted in a cubicle, the optical fibers must be disconnected
from the OEM ports.
Strictly follow the instructions from the manufacturer for specific types of optical cables/
connectors.
When utilizing galvanic RJ45 SFP ports for the IEDs network connection(s), the installation
shall be done in such way that the electrical power distribution environment follows
Environment A as specified in IEEE 802.3. In other words, the LAN or LAN segments, with all
its associated interconnected equipment, is entirely contained within a single low-voltage
power distribution system and within a single building.
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Section 6
Connecting
M12637-2 v6
67