Masoneilan Products SVI II ESD - GE Energy
Masoneilan Products SVI II ESD - GE Energy
Masoneilan Products SVI II ESD - GE Energy
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Safety Information<br />
Connecting the <strong>SVI</strong> <strong>II</strong> <strong>ESD</strong> to the SIS Logic Solver<br />
Connecting the <strong>SVI</strong> <strong>II</strong> <strong>ESD</strong> to<br />
When connecting the <strong>SVI</strong> <strong>II</strong> <strong>ESD</strong> to the SIS logic solver follow these guidelines:<br />
General Requirements<br />
The <strong>SVI</strong> <strong>II</strong> <strong>ESD</strong> is connected to the safety rated logic solver which is<br />
actively performing the safety function. Connections must be made per<br />
the instructions supplied by the safety rated logic solver.<br />
The output rating of the I/O module must meet or exceed the electrical<br />
specifications of the <strong>SVI</strong> <strong>II</strong> <strong>ESD</strong> as referenced in ES727 ( “Hazardous<br />
Location Installation” on page 65).<br />
The following general requirements for the <strong>SVI</strong> <strong>II</strong> <strong>ESD</strong> must be adhered to:<br />
The system’s response time must be less than process safety time. The<br />
<strong>SVI</strong> <strong>II</strong> <strong>ESD</strong> switches to its fail safe state in less than 100 ms. Response<br />
time is actuator dependent.<br />
You must add the <strong>SVI</strong> <strong>II</strong> <strong>ESD</strong> response time to actuator/valve response<br />
to get overall response time<br />
All SIS components including the <strong>SVI</strong> <strong>II</strong> <strong>ESD</strong> must be operational before<br />
process start-up. The internal diagnostic test that monitors the <strong>SVI</strong> <strong>II</strong><br />
<strong>ESD</strong> for faults has a 1 hour test interval. This test does not partial stroke<br />
the valve.<br />
In order to use the PST as an automatic diagnostic tool the PST must be<br />
scheduled (using ValVue <strong>ESD</strong>) to run at least once per month or ten<br />
times within the expected hazard demand interval whichever comes first.<br />
Detailed failure rate data is specified in the FMEDA report available from<br />
the factory.<br />
You must verify that the <strong>SVI</strong> <strong>II</strong> <strong>ESD</strong> is suitable for use in safety<br />
applications by confirming the <strong>SVI</strong> <strong>II</strong> <strong>ESD</strong>’s nameplate is properly<br />
marked.<br />
Personnel performing maintenance and testing on the <strong>SVI</strong> <strong>II</strong> <strong>ESD</strong> must<br />
be qualified to do so.<br />
Results from the PST and proof tests must be recorded and reviewed<br />
periodically.<br />
The useful life of the <strong>SVI</strong> <strong>II</strong> <strong>ESD</strong> is discussed in the Failure Modes,<br />
Effects and Diagnostic Analysis Report for the <strong>SVI</strong> <strong>II</strong> <strong>ESD</strong>.<br />
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