Specifications

7SR242 Duobias Data Communications
©2010 Siemens Protection Devices Limited Chapter 4 Page 10 of 43
RS232 to Fibre
Optic Converter
Tx
Rx
Tx
Rx
62.5/125µm fibre optic with ST
connectors
Tx
Rx
Tx
Rx
Computer or
Control System
USB or 9 pin male
D connector
RS232 straight
through cable
25 pin male
D connector
Figure 2-3 Communication to Multiple Devices using Fibre-optic Ring Network
Figure 2-4 Communication to Multiple Devices from Control System and Laptop using Fibre-optic Star Network