IEC 61508 Functional Safety Assessment Emerson Process ... - Exida
IEC 61508 Functional Safety Assessment Emerson Process ... - Exida
IEC 61508 Functional Safety Assessment Emerson Process ... - Exida
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3 Product Description<br />
3.1 3144P Temperature Transmitter<br />
This report documents the results of the <strong>Assessment</strong> performed for the 3144P Temperature<br />
Transmitter with option code QT or QS and Hardware version 20 and Software version 1.1.X<br />
(Device Label SW REV 1.1.X). The 3144P Temperature Transmitter is a 2 wire 4-20 mA smart<br />
device. For safety instrumented systems usage it is assumed that the 4-20 mA output is used as<br />
the primary safety variable. The transmitter can be equipped with or without display.<br />
The 3144P Temperature Transmitter is classified as a Type B device according to <strong>IEC</strong> <strong>61508</strong> (See<br />
section 7.4.3.1.3 of <strong>IEC</strong> <strong>61508</strong>-2), having hardware fault tolerance of 0. Combined with one or two<br />
temperature sensing elements, the 3144P becomes a temperature sensor assembly. The<br />
temperature sensing elements that can be connected to the 3144P transmitter are:<br />
2-, 3-, and 4-wire RTD<br />
Thermocouple<br />
Millivolt Input (-10 to 100mV)<br />
2-, 3-, and 4-wire ohm input (0 to 2000Ω)<br />
© exida Certification rosemount 11-02-57 r002 iec <strong>61508</strong> assessment.docx, 5/14/2012<br />
Michael Medoff Page 12 of 21
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