Siemens 7SG11 Technical Manual page 47

APPENDIX A - COMMUNICATION CONNECTIONS
Figures 1 to 6 illustrate a number of methods of connecting relays in communications networks.
(Note that in the case of the optical ring configuration (figure 5), the Data Echo feature must be switched ON in
the communications settings menu of the relay. In all other cases this setting should be set to OFF).
SIGMA-4
Personal Computer
1. Dialogue type comms (connection oriented)
2. Dialogue for purpose of analogue and digital fault
waveform extraction and display, setting display and change,
event display, instruments etc.
3. Manufacturer specific
Modem
Personal Computer
Modem
Personal Computer
- Version of the former configuration of Figure 1. It is
necessary to make dial-up connection before actual
information exchange.
Figure 2 - Basic Communications Configuration (Remote)
©2011 Siemens Protection Devices Limited
Optical link
Parallel hardwired connections
(clean contacts, binary inputs)
Figure 1 - Basic Communications Configuration
SIGMA-4
Modem
P
S
T
N
PSTN : Public Switched Telephone Network
7SG11 Argus 8 Communication Interface
Classical SCADA
Parallel hardwired connections
(clean contacts, binary inputs)
Classical SCADA
Optical link
Chapter 4 Page 6 of 8
EMS Remote
Control Points
EMS Remote
Control Points