Emerson Rosemount 644 with HART Protocol User Manual

Reference Manual
00809-0200-4728, Rev SA
Safety Instrumented Systems (SIS) Certification
July 2018
81
Safety Instrumented Systems (SIS) Certification
Section 7 Safety Instrumented Systems (SIS)
Certification
SIS certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 81
Safety certified identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 81
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 82
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 82
Alarm and saturation levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 82
Operation and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 83
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 85
Note
This section applies to the 4–20 mA only.
7.1 SIS certification
The safety-critical output of the Rosemount™ 644P Temperature Transmitter is provided through a
2-wire, 4–20 mA signal representing temperature. The Rosemount 644 Transmitter can be equipped
with or without a display. The Rosemount 644P Safety Certified Safety Transmitter is certified to: Low
demand; Type B.
 SIL 2 for random integrity at HFT=0
 SIL 3 for random integrity at HFT=1
 SIL 3 for systematic integrity
7.2 Safety certified identification
All Rosemount 644 HART
®
Head Mount and Field Mount Transmitters must be identified as safety
certified before installing into a SIS.
To identify a safety certified Rosemount 644 Transmitter, make sure the device satisfies the
requirements below:
1. Verify the transmitter was ordered with output option code “A” and option code “QT”. This signifies
that it is a 4–20 mA/HART safety certified device.
a. For example: MODEL 644HA..........QT.....
2. See a Yellow Tag affixed to the top of the transmitter face or a Yellow Tag affixed to the outside of the
enclosure if pre-assembled.
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.

Emerson Rosemount 644 with HART Protocol Specifications

General

Brand	Emerson
Model	Rosemount 644 with HART Protocol
Category	Transmitter
Language	English