Reference Manual
00809-0200-4728, Rev RA
Section 7: Safety Instrumented Systems (SIS) Certification
April 2015
83
Safety Instrumented Systems (SIS) Certification
Section 7
Safety Instrumented Systems
(SIS) Certification
SIS certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 83
644 safety certified identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 83
Installation in SIS application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 84
Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 84
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 85
Alarm and saturation levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 85
644 SIS operation and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 86
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 88
7.1
SIS certification
The 644 Temperature Transmitter is a 2-wire, 4-20 mA smart device. For safety instrumented
systems usage it is assumed that the 4-20 mA output is used as the primary safety variable. The
transmitter can be equipped with or without the display. The 644 Temperature Transmitter is
classified as a Type B device according to IEC61508, having a hardware fault tolerance of 0.
The 644 HART
Head Mount and Field Mount Transmitters are certified to IEC 61508 for single
transmitter use in SIS up to SIL 2 and redundant transmitter use in SIS up to SIL 3.
7.2
644 safety certified identification
All 644 HART Head Mount and Field Mount Transmitters must be identified as safety certified
before installing into a SIS.
To identify a safety certified 644, make sure the device satisfies number 1 below as well as at
least one of the options in 2, 3 or 4.
1.
Verify the transmitter was ordered with Output Option code “A”. This signifies that it is
a 4-20mA/HART device.
a.
For Example: MODEL 644HA……….
2.
See a Yellow Tag affixed to the top of the transmitter face, a yellow Tag affixed to the
outside of the enclosure if pre-assembled, or the option code QT in the transmitter
model string.
3.
Check the Namur Software Revision located on the adhesive transmitter tag.
“SW _._._”.
If the Device label software revision is 1.1.1 or higher, the device is safety certified.
Содержание Rosemount 644
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