16 3BSE036351-510 A
Safety Summary
Before replacing Units
Maintenance
All procedures for replacing units can be located by referring to the relevant
documentation.
Removing or replacing units with system power connected can cause injury to
personnel and damage to equipment. It is, therefore, of the utmost importance
that the power supply be fully disconnected, on the process side, before removal
or insertion of units takes place.
See Online Replacement of Unit on page 198 and I/O documentation.
It is recommended that a stock of suitable spare components be maintained to
avoid system downtime.
Ensure that back-up copies of the current application program are made at
regular, predetermined intervals to avoid system downtime.
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