Technical Data; Line Data Communication Module Ldcm; Introduction - ABB Relion 670 Series Technical Reference Manual

Section 17
IED hardware
17.2.16.4
17.2.17
17.2.17.1
654
Receiver
LED
25MHz oscillator
Transmitter
Receiver
LED
25MHz oscillator
Transmitter
IEC05000472 V1 EN
Figure 317: OEM layout, standard PMC format 2 channels

Technical data

Table 465: OEM - Optical ethernet module
Quantity
Number of channels
Standard
Type of fiber
Wave length
Optical connector
Communication speed
Line data communication module (LDCM)

Introduction

The line data communication module (LDCM) is used for communication between
the IEDs situated at distances <110 km or from the IED to optical to electrical
converter with G.703 interface located on a distances <3 km away. The LDCM
module sends and rereceives data, to and from another LDCM module. The IEEE/
ANSI standard format is used.
The line data communication module is used for binary signal transfer. The module
has one optical port with ST connectors see figure 318.

Line data communication module LDCM

Each module has one optical port, one for each remote end to which the IED
communicates.
Ethernet cont.
PCI to PCI
Ethernet cont.
bridge
Rated value
1 or 2
IEEE 802.3u 100BASE-FX
62.5/125 mm multimode fibre
1300 nm
Type ST
Fast Ethernet 100 MB
1MRK 505 208-UEN B
ID chip
en05000472.vsd
Technical reference manual