Siemens 7sg15 microtapp - Page 64

7SG15 MicroTAPP Communications Interface
Serial optical link
Rx
Tx
Local
System
Sigma 3
(SG3-101)
Tx
Tx
Tx
Tx
Rx
Rx
Rx
Rx
Laptop computer
Control System
Figure 2 - Fibre Optic Ring Connection using Sigma 3
Up to 29 Serial Optical Links to relays
Sigma 1
(SG1-102..108)
Control System
or
Sigma 3
or
Sigma 4
Master Serial Optical Link
Note, each Serial Optical Link consists of two fibres, a transmit and a receive
Figure 3 - Fibre Optic Star Connection Using Sigma 1
Tx
Rx
Laptop computer
Sigma 4
(SG4-101..102)
Rx
Tx
Local
Figure 4 - Fibre Optic Connection to One Relay using Sigma 4
Tx
Rx
Laptop computer
Sigma 4
(SG4-101..102)
Rx
Tx
Local
Modem Modem
Telephone
Network
Figure 5 – Remote Dial-Up Connection using Sigma 4
©2011 Siemens Protection Devices Limited Chapter 4 Page 8 of 8