ABB Relion 670 Series Application Manual page 70

Section 5
Communication set-up
IEC06000393 V3 EN-US
Figure 63: MR-LDCM and LR-LDCM layout with two PCI connectors and one I/O FC/PC
Table 19:
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
*) depending on optical budget calculation
**) C37.94 originally defined just for multi-mode; using same header, configuration and data format as C37.94
64
type connector
Line data communication module
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IEC06000393-3-en.vsdx
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 26.8 dB (typical
distance about 3 distance 80 km/50
km/2 mile *) mile *)
11.5 dB (typical
distance about 2
km/1 mile *)
Type ST Type FC/PC
C37.94 C37.94
implementation **)
Synchronous Synchronous
64 kbit/s 64 kbit/s
Internal or derived Internal or derived
from received from received
signal signal
Communication set-up, 670/650 series
1MRK 505 382-UEN E
M12756-1 v12
Long range (LR)
Single-mode fiber
glass 9/125 µm
1550 nm
1580 nm
1520 nm
28.7 dB (typical
distance 120 km/68
mile *)
Type FC/PC
C37.94
implementation **)
Synchronous
64 kbit/s
Internal or derived
from received
signal
Application Guide