ABB rec670 - Page 103

Remote communication
M12756-1 v10
Table 140. Line data communication module
Characteristic Range or value
Type of LDCM Short range (SR) Medium range (MR) Long range (LR)
Type of fiber Graded-index
multimode 62.5/125
µm
Graded-index
multimode 50/125
µm
Singlemode 9/125
µm
Singlemode 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
Graded-index multimode 62.5/125 mm
13 dB (typical
distance about 3
km/2 mile *)
22 dB (typical
distance 80 km/50
mile *)
26 dB (typical
distance 110 km/68
mile *)
Graded-index multimode 50/125 mm
9 dB (typical distance
about 2 km/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 multimode; using same header, configuration and data format as C37.94
1MRK 511 404-BEN A
Bay control REC670 2.2
Product version: 2.2.1
ABB 103