Table 7: Comparison Of Network Topologies - ABB UniGear Series Engineering Manual

E NG INEE R ING
Comparison of network topologies
Comparison of network topologies is shown in table below.

Table 7: Comparison of network topologies

ARCHITECTURE
Supported topologies
Connecting single port
protection relays
Number of devices
Network independent of
protection relays
INTEROPERABILITY
Interoperability
with non-redundant
protection relays
Compatible with
standard Ethernet Com-
ponents
PERFORMANCE
Recovery time
Network bandwidth
Latency
AVAILABILITY
Failure of a switch / ac-
tive network component
Failure of 2 or more
protection relays
1V LG 5 000 07 E
SINGLE network
+ RSTP
Any topology: tree, star,
ring, mashed
Yes
No limitations, due to
flexible topology
Yes
Yes
Yes
10...500 ms
Full bandwidth
No latency in protection
relay
Connected protection re-
lays are lost
No impact to
communication
PRP networks
Any topology: tree, star,
ring, mashed
Yes, directly to one net-
work
No limitations, due to
flexible topology
Yes
Yes
Yes
0 ms
Full bandwidth
No latency in protection
relay
No impact
No impact to Communication between
communication
E T HE R NE T
HSR network
Limited: rings, rings of
rings
No, only via Redbox
Max 30 per ring
No
No, only via Redbox
No, HSR support is
needed
0 ms
Half bandwidth
Latency in each protec-
tion relay
One protection relay is
lost
relays interruption
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