ABB REL670 - Page 114

Remote communication
Table 165. Line data communication module
Characteristic Range or value
Type of LDCM Short range (SR) Medium range (MR) Long range (LR)
Type of fiber Graded-index multimode
62.5/125 µm
Graded-index multimode 50/125
µm
Singlemode 9/125 µm Singlemode 9/125 µm
Peak Emission Wave length
Nominal
Maximum
Minimum
820 nm
865 nm
792 nm
1310 nm
1330 nm
1290 nm
1550 nm
1580 nm
1520 nm
Optical budget
Graded-index multimode 62.5/125 mm
13 dB (typical distance about 3
km/2 mile *)
22 dB (typical distance 80 km/50
mile *)
26 dB (typical distance 110
km/68 mile *)
Graded-index multimode 50/125 mm
9 dB (typical distance about 2
km/1 mile *)
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 Mbit/s / 64 kbit/s 2 Mbit/s / 64 kbit/s 2 Mbit/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
1MRK 506 372-BEN -
Line distance protection REL670 2.2
Product version: 2.2
114 ABB