Connecting Remote Communication Interfaces Ldcm - ABB RELION 670 Series Installation Manual

Section 6
Connecting
6.3.2
72
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.
Fibre-optical cables are very sensitive to handling. Do not bend too
sharply. The minimum curvature radius is 15 cm for plastic fibre
cables and 25 cm for glass fibre 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 fibres. Do not twist, pull or bend the fibre.
Invisible damage may increase fibre 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 distances follow the applicable national
regulations for the highest voltage that may be present within the
cabinet. This can be done by ensuring that the LAN cables are
installed and fixed with sufficient distance to all HLV circuits.
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.

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
1MRK 514 026-UEN B
M12637-2 v6
670 series 2.2 IEC
Installation manual