Cobranet Primary & Secondary - Yamaha ACU16-C Owner's Manual

CobraNet Primary & Secondary
These two examples show how the CobraNet PRIMARY and SECONDARY ports can be
used to build redundancy into systems. In the first example, if a primary connection fails,
the system automatically switches to secondary and operation continues uninterrupted.
However, if the switching hub fails, the entire system stops working. In the second example,
individual switching hubs are used for primary and secondary, so even if switching hub A
fails, operation continues on secondary via switching hub B.
Ex. 1
NHB32-C
ACU16-C
Ex. 2
NHB32-C
ACU16-C
NETWORK HUB AND BRIDGE
LINK CONDUCT 88
LOCK ERROR
Ethernet switching hub
NETWORK HUB AND BRIDGE
LINK CONDUCT 88
LOCK ERROR
Ethernet switching hub A
CobraNet Primary & Secondary
NHB32-C
LINK CONDUCT
LOCK ERROR
ACU16-C
Primary CobraNet
Secondary CobraNet
NHB32-C
LINK CONDUCT
LOCK ERROR
Ethernet switching hub B
ACU16-C
ACU16-C & NHB32-C Owner's Manual
35
NETWORK HUB AND BRIDGE
88
NETWORK HUB AND BRIDGE
88