High Availability Theoretical Basics - Schneider Electric
High Availability Theoretical Basics - Schneider Electric
High Availability Theoretical Basics - Schneider Electric
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Redundant PLC System, Using Shared Remote I/O Racks<br />
Simple Architecture with a Standalone CPU Rack<br />
Standalone CPU Rack<br />
Calculation Examples<br />
Consider a standalone CPU rack equipped<br />
with power supply, CPU, remote I/O<br />
processor and Ethernet communication<br />
modules.<br />
As in the previous section, calculate the<br />
potential gain a redundant architecture would<br />
allow, in terms of Reliability and <strong>Availability</strong>.<br />
First calculate the individual modules MTBFs,<br />
then establish, for each subsequent rack, a<br />
worksheet that provides the Reliability and<br />
<strong>Availability</strong> metrics figures.<br />
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