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1.5
1.5.1
1.5.2
1.6
1.6.1
118
Remote end data communication
Interface type
RS 530/RS422 Contra-directional
G.703 Co-directional
Function
Data transmission
Transmission type
Short range galvanic module
Application
The short-range galvanic module DCM-SGM can be used for communication over galvanic pi-
lot wires and can operate over distances of up to 3 km depending on pilot wire cable. Twist-
ed-pair or double-shielded cable is recommended.
Technical data
Table 124: DCM-SGM - Short-range galvanic module
Data transmission
Transmission rate
Clock source
Range
Line interface
Connector
Insulation
Short range fibre optical module
Application
The short-range fibre optical module DCM-SFOM can only be used with multi-mode fibre.The
communication distance is normally 3 to 5 km. This module can also be used for direct connec-
tion to optical/electrical communication converters of type 21-15xx and 21-16xx from FIBER-
DATA
Physically the DCM module is inserted in slot position S19 for 1/2 19" rack.
According to standard
EIA
ITU (CCITT)
Value
synchronous, full duplex
56 or 64 kbit/s
For G703 only 64 kbit/s
Synchronous, full duplex
64 kbit/s (256 kBaud; code transparent)
Internal or derived from received signal
< 3 km
Balanced symmetrical three-state current loop (4 wires)
5-pin connector with screw connection
2,5 kV 1 min. Opto couplers and insulating DC/DC-converter
15 kV with additional insulating transformer
Chapter 9
Data communication
Connector type
D-sub 25 pins
Screw
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