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 - Siemens 7SR21 Manual
Non-directional. directional. overcurrent relay
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Also See for 7SR21:
- Technical manual (644 pages) ,
- Manual (71 pages) ,
- Installation manual (22 pages)
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Figure 2-3
Computer or
Control System
USB or 9 pin male
D connector
Figure 2-4
Communication to Multiple Devices from Control System and Laptop using Fibre-optic Star Network
©2010 Siemens Protection Devices Limited
Communication to Multiple Devices using Fibre-optic Ring Network
To
Control
System
7SG24
Tx
Master
Rx
Tx
Rx
Tx
Rx
Tx
Rx
RS232 straight
through cable
Tx
Rx
25 pin male
D connector
7SR21 & 7SR22 Data Communications
Rx
Tx
62.5/125µm fibre optic
with ST connectors
Chapter 4 Page 10 of 15
Rx
Tx
Rx
Tx
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