Configuration Of Redundant Channels - Hitachi 670 Series Application Manual

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1MRK505382-UEN Rev. K

IEC07000228 V2 EN-US

Figure 19:

4.4

Configuration of redundant channels

LDCM installation should follow a specific sequence: slot 312, slot 313, slot 322, slot 323, slot 305,

slot 306. 2-4 LDCMs can be included in the installation depending on the availability of IRIG-B and

RS485 modules.

If available, IRIG-B is installed to slot 313 and RS485 to slot 312.

Main and redundant channels are installed in the same base card in slots 305–306, 312–313, and

322–323.

Positions for the main and redundant channels are predefined in the basic configuration, and they

cannot be changed. Only slots 306, 313 and 323 can be set as redundant line differential

communication channels via PCM600.

Signal matrix for the redundant channel must be empty. It is updated automatically when the main

channel is lost.

IEC10000068 V1 EN-US

Figure 20:

Communication set-up, 670/650 series

Application Guide

Typical LDCM application

Signal matrix for one main channel

Analog and binary signal transfer for line differential protection

GUID-13B60A3E-CF41-4322-9576-42B5B9152EA5 v1

GUID-99F3FF15-FC76-48DC-959F-FAC1BE0CA4A9 v1

Section 4

Table of Contents

650 series