ABB RET670 - Line Data Communication Module

Remote communication
Table 106. 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
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,
Graded-index multimode 50/125 mm
13 dB (typical
distance about 3
km/2 mile *)
9 dB (typical
distance about 2
km/1 mile *)
22 dB (typical
distance 80 km/50
mile *)
26 dB (typical distance 110 km/68
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 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
Transformer protection RET670 2.0
1MRK 504 141-BEN C
Product version: 2.0
ABB 95