ABB REL 551-C1*2.5 - Application; Galvanic Interface; Technical Data

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Remote end data communication Chapter 9
Data communication
1.3.2 Technical data
Table 122: DCM-FOM - Fibre optical communication module
1.4 Galvanic interface
1.4.1 Application
The galvanic data communication modules according to V35/36 DCM-V36 contra, DCM-V36
co, X.21 DCM-X21, RS530/422 DCM-RS 530 contra, DCM-RS 530 co can be used for galvanic
short range communication covering distances up to 100 m in low noise environments. Only
contra-directional operation is recommended for best system performance. These modules are
designed for 64 kbit/s operation but can also be used at 56 kbit/s.
1.4.2 Technical data
Table 123: DCM - Galvanic data communication module
Optical interface
Type of fibre Graded-index multimode
50/125
μm or 62,5/125μm
Single mode 9/125 μm
Wave length 1300 nm 1300 nm
Optical transmitter
injected power
LED
-17 dBm
LED
-22 dBm
Optical receiver
sensitivity
PIN diode
-38 dBm
PIN diode
-38 dBm
Optical budget 21 dB 16 dB
Transmission distance typical 15-20 km
a)
typical 40-60 km
a)
Optical connector Type FC-PC Type FC-PC
Protocol ABB specific ABB specific
Data transmission Synchronous, full duplex Synchronous, full duplex
Transmission rate 64 kbit/s 64 kbit/s
Clock source Internal or derived from received
signal
Internal or derived from received
signal
a)
depending on optical budget calculation, see example in Application manual for REC 561
Interface type According to standard Connector type
V.36/V11 Co-directional (on request) ITU (CCITT) D-sub 25 pins
V.36/V11 Contra-directional ITU (CCITT) D-sub 25 pins
X.21/X27 ITU (CCITT) D-sub 15 pins
RS 530/RS422 Co-directional (on request) EIA D-sub 25 pins