Bay control REC670
Version 2.2
Remote communication
Table 154. 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 155. Galvanic X.21 line data communication module (X.21-LDCM)
Quantity
Connector, X.21
Connector, ground selection
Standard
Communication speed
Insulation
Maximum cable length
Hitachi Power Grids
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 511 404-BEN N
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
121