ABB Relion REL650 Series Product Manual page 100

Line distance protection REL650
Version 2.2
Remote communication
Table 142. Line data communication module
Characteristic
Type of LDCM
Type of fiber
Peak Emission Wave length
Nominal
Maximum
Minimum
Optical budget
Multi-mode fiber glass 62.5/125 mm
Multi-mode fiber glass 50/125 mm
Optical connector
Protocol
Data transmission
Transmission rate / Data rate
Clock source
1) depending on optical budget calculation
2) Applicable for revision r11 of MR LDCM and later.
3) C37.94 originally defined just for multi-mode; using same header, configuration and data format as C37.94
Class 1 laser product. Take adequate
measures to protect the eyes. Never look
into the laser beam. Complies to laser
safety classification according to IEC
60825-1.
100
M12756-1 v14
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1MRK 506 384-BEN H
Range or value
Short range (SR) Medium range (MR)
Multi-mode fiber Single-mode fiber
glass 62.5/125 µm glass 9/125 µm
Multi-mode fiber
glass 50/125 µm
820 nm 1310 nm
865 nm 1330 nm
792 nm 1290 nm
18.8 dB (typical 28.8 dB (typical
distance about 3 distance 80 km/50
1) 1)
km/2 mile mile
30.8 dB
11.8 dB (typical
distance about 2
km/1 mile *)
Type ST Type FC/PC
C37.94 C37.94
implementation
Synchronous Synchronous
2 Mbit/s / 64 kbit/s 2 Mbit/s / 64 kbit/s
Internal or derived Internal or derived
from received signal from received signal
Hitachi Power Grids
2)
3)