Saia-Burgess Controls AG
User Manual Standby System
│
Document 27-645
│
Edition E
NG 02
│
2017-04-26
Designing the System
Standby System Overview
1-5
1
1.3
Designing the System
Redundant automation solutions can be achieved with various network topologies.
Physically separating the management network (SCADA systems) and the
network for the remote I/Os is recommended. We also recommend setting up
the remote I/O network in a ring structure using fibre-optic network components.
This significantly increases the performance, security and, above all, the network
availability and thus the system reliability. Standard devices from third-party
providers can be used for the network components (switches). We have had good
experiences with the switches (RS30) from Hirschmann. However, the networks
can also be set up with standard components in a star structure. A shared physical
network for the remote I/Os and management systems is also possible, but
availability of the system will be reduced accordingly.
Ethernet
SCADA 1
SCADA 2
Network redundancy
with fiber optical ring
Secondary
Primary
Process I/O
Process I/O
Standby Controller
PCD3.M6880
SCADA-System
Smart RIOs
PCD3.T668
Ethernet
Ethernet
SCADA 1
SCADA 2
Secondary
Primary
Process I/O
Process I/O
Standby Controller
PCD3.M6880
Smart RIOs
PCD3.T668
SCADA-System
Recommended network topology with physi-
cally separate networks and a fibre-optic ring
Physically separate networks in a star topology
with standard components
Ethernet
Standby CPU
PCD3.M6880
Standby CPU
PCD3.M6880
SCADA 1
SCADA 2
Secondary
Primary
Process I/O
Process I/O
SCADA-System
Smart RIOs
PCD3.T668
Shared physical network in a star topology with
standard components