21.2.14.4 Technical data
Table 922: OEM - Optical ethernet module
Quantity
Rated value
Number of channels 1 or 2
Standard IEEE 802.3u 100BASE-FX
Type of fiber
62.5/125 mm multimode fibre
Wave length 1300 nm
Optical connector Type ST
Communication speed Fast Ethernet 100 Mbit/s
21.2.15 Line data communication module (LDCM)
21.2.15.1 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
540.
Line data communication module LDCM
Each module has one optical port, one for each remote end to which the IED
communicates.
Alternative cards for Long range (1550 nm single mode), Medium range (1310 nm
single mode) and Short range (850 nm multi mode) are available.
Class 1 laser product. Take adequate measures to protect the eyes.
Never look into the laser beam.
21.2.15.2 Design
The LDCM is a PCMIP type II single width format module. The LDCM can be
mounted on:
• the ADM
• the NUM
Section 21 1MRK502052-UEN B
IED hardware
1190
Technical manual
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