ABB Relion 670 series REC670 - Page 66

Remote communication
Table 87. Line data communication module
Characteristic Range or value
Type of LDCM Short range (SR) Medium range (MR) Long range (LR)
Type of fibre Graded-index
multimode
62.5/125 µm or
50/125 µm
Singlemode 9/125 µm Singlemode 9/125 µm
Wave length 850 nm 1310 nm 1550 nm
Optical budget
Graded-index multimode 62.5/125 mm,
Graded-index multimode 50/125 mm
13 dB (typical
distance about 3
km *)
9 dB (typical
distance about 2
km *)
22 dB (typical
distance 80 km *)
26 dB (typical distance 110 km *)
Optical connector Type ST Type FC/PC Type FC/PC
Protocol C37.94 C37.94
implementation **)
C37.94 implementation **)
Data transmission Synchronous Synchronous Synchronous
Transmission rate / Data rate 2 Mb/s / 64 kbit/s 2 Mb/s / 64 kbit/s 2 Mb/s / 64 kbit/s
Clock source Internal or derived
from received
signal
Internal or derived
from received signal
Internal or derived from received
signal
*) depending on optical budget calculation
**) C37.94 originally defined just for multimode; using same header, configuration and data format as C37.94
Bay control REC670
1MRK511232-BEN E
Pre-configured
Product version: 1.2
66 ABB