Hitachi Relion REL670 Product Manual page 142

Line distance protection REL670
Version 2.2
Remote communication
Table 192. 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
1) depending on optical budget calculation
2) Applicable for revision r11 of MR LDCM and later.
3) C37.94 originally defined just for multi-mode; using same header, configuration and data format as C37.94
Class 1 laser product. Take adequate
measures to protect the eyes. Never look
into the laser beam. Complies to laser
safety classification according to IEC
60825-1.
Table 193. Galvanic X.21 line data communication module (X.21-LDCM)
Quantity
Connector, X.21
Connector, ground selection
Standard
Communication speed
Insulation
Maximum cable length
142
M12756-1 v14
Range or value
Short range (SR)
Multi-mode fiber
glass 62.5/125 µm
Multi-mode fiber
glass 50/125 µm
820 nm
865 nm
792 nm
18.8 dB (typical
distance about 3
km/2 mile
11.8 dB (typical
distance about 2
km/1 mile
Type ST
C37.94
Synchronous
2 Mbit/s / 64 kbit/s
Internal or derived
from received signal
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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Medium range (MR)
Single-mode fiber
glass 9/125 µm
1310 nm
1330 nm
1290 nm
28.8 dB (typical
distance 80 km/50
1) 1)
mile
2)
30.8 dB
1)
Type FC/PC
C37.94
3)
implementation
Synchronous
2 Mbit/s / 64 kbit/s
Internal or derived
from received signal
1MRK 506 372-BEN Q
Long range (LR)
Single-mode fiber
glass 9/125 µm
1550 nm
1580 nm
1520 nm
28.7 dB (typical
distance 120 km/75
1)
mile
Type FC/PC
C37.94
3)
implementation
Synchronous
2 Mbit/s / 64 kbit/s
Internal or derived
from received signal
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