Fault tolerant link – Perle Systems RIO 5500036-17 User Manual
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RIO Remote I/O System User Guide
Example RIO systems
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Chapter 1 Introduction
Fault tolerant link
In a typical non fault tolerant RIO system, a host card is connected to a peripheral (for
example, a printer) via a single link and RTA. In order to make the system fault tolerant, that
is to protect against RTA or link failure, multiple RTAs and links are added.
The next picture shows a typical system which features two backup RTAs and a backup link
to the host. If one RTA or link cable is damaged there is still a path from the host and system
operation is not disrupted.
For further information about installing a fault tolerant system, see
and
Installing a fault tolerant link
in
.
RIO Host card
Backup link to host
Multiple RTAs to
maintain operation
in event of RTA
failure
Peripheral
For example,
printer