ABB Relion 670 Series Product Manual page 124

Generator protection REG670
Version 2.2
Remote communication
Table 163. 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
*) depending on optical budget calculation
**) C37.94 originally defined just for multi-mode; using same header, configuration and data format as C37.94
Table 164. Galvanic X.21 line data communication module (X.21-LDCM)
Quantity
Connector, X.21
Connector, ground selection
Standard
Communication speed
Insulation
Maximum cable length
124
M12756-1 v13
GUID-83EC40D0-ABCF-4292-B3DF-155C3A556B76 v4
Range or value
Micro D-sub, 15-pole male, 1.27 mm (0.050") pitch
2 pole screw terminal
CCITT X21
64 kbit/s
1 kV
10 m
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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
2 Mbit/s / 64 kbit/s 2 Mbit/s / 64 kbit/s
Internal or derived Internal or derived
from received from received
signal signal
1MRK 502 074-BEN M
Long range (LR)
Single-mode fiber
glass 9/125 µm
1550 nm
1580 nm
1520 nm
28.7 dB (typical
distance 110 km/68
mile *)
Type FC/PC
C37.94
implementation **)
Synchronous
2 Mbit/s / 64 kbit/s
Internal or derived
from received signal
Hitachi Power Grids