ABB Relion 670 series - Page 1332

22.2.15.3 Technical data
SEMOD55324-1 v1
M12756-1 v12
Table
1040:
Line data communication module
Characteristic Range or value
Type of LDCM Short range (SR) Medium range (MR) Long range (LR)
Type of fiber Multi-mode fiber
glass 62.5/125 µm
Multi-mode fiber
glass 50/125 µm
Single-mode fiber
glass 9/125 µm
Single-mode fiber
glass 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
Multi-mode fiber glass 62.5/125 mm
18.8 dB (typical
distance about 2
mile *)
26.8 dB (typical
distance 50 mile *)
28.7 dB (typical
distance 68 mile *)
Multi-mode fiber glass 50/125 mm
11.5 dB (typical
distance about 1
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 Mbit/s / 64
kbit/s
2 Mbit/s / 64
kbit/s
2 Mbit/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 multi-mode; using same header, configuration and data format as C37.94
22.2.16 Galvanic X.21 line data communication (X.21-LDCM)
GUID-75B89AAC-1A2D-4774-B357-88F7AB7F392A v1
22.2.16.1 Introduction
GUID-D02150FC-54F5-4CE4-8D3D-9F8796B6A527 v3
The galvanic X.21 line data communication module is used for connection to telecommunication
equipment, for example leased telephone lines. The module supports 64 kbit/s data
communication between IEDs.
Examples of applications:
• Line differential protection
• Binary signal transfer
22.2.16.2 Design
GUID-0570749A-516C-47D6-A818-83416759BA90 v5
The galvanic X.21 line data communication module uses a ABB specific PC*MIP Type II format.
Section 22 1MRK 502 066-UUS B
IED hardware
1326
Technical manual