ABB UniGear Digital User Manual

ENGINEERING ETHE RNE T
1VLG5 00007 E 65
Comparison of network topologies
Comparison of network topologies is shown in table below.
Table 7: Comparison of network topologies
SINGLE network
+ RSTP
PRP networks
HSR network
ARCHITECTURE
Supported topologies
Any topology: tree, star,
ring, mashed
Any topology: tree, star,
ring, mashed
Limited: rings, rings of
rings
Connecting single port
protection relays
Yes
Yes, directly to one net-
work
No, only via Redbox
Number of devices
No limitations, due to
flexible topology
No limitations, due to
flexible topology
Max 30 per ring
Network independent of
protection relays
Yes
Yes
No
INTEROPERABILITY
Interoperability
with non-redundant
protection relays
Yes
Yes
No, only via Redbox
Compatible with
standard Ethernet Com-
ponents
Yes
Yes
No, HSR support is
needed
PERFORMANCE
Recovery time
10…500 ms
0 ms
0 ms
Network bandwidth
Full bandwidth
Full bandwidth
Half bandwidth
Latency
No latency in protection
relay
No latency in protection
relay
Latency in each protec-
tion relay
AVAILABILITY
Failure of a switch / ac-
tive network component
Connected protection re-
lays are lost
No impact
One protection relay is
lost
Failure of 2 or more
protection relays
No impact to
communication
No impact to
communication
Communication between
relays interruption

ABB UniGear Digital Specifications

General

Brand	ABB
Model	UniGear Digital
Category	Switch
Language	English