Table of Contents
Specifications and Reference Data
July 2016
A.4 Ordering information
Table A-3. Rosemount 644 Temperature Transmitter Ordering Information
H The Standard offering represents the most common models and options. These options should be selected for best delivery.
The Expanded offering is manufactured after receipt of order and is subject to additional delivery lead time.
Model
Product description
644
Temperature Transmitter
Transmitter type
H
DIN A Head Mount - Single Sensor Input
R
Rail Mount - Single Sensor Input
S
DIN A Head Mount - Dual Sensor Input (HART only)
Output
A
4–20 mA with digital signal based on HART protocol
F
Fieldbus digital signal (includes 2 AI function blocks and Backup Link Active
OUNDATION
F
Scheduler)
W
PROFIBUS PA digital signal
Product certifications
Hazardous Locations Certificates (consult factory for availability)
NA
No approval
E5
FM Explosion-proof; Dust Ignition-proof
I5
FM Intrinsically Safe; Non-incendive
K5
FM Explosion-proof; Intrinsically Safe; Non-incendive; Dust Ignition-proof
Specifications and Reference Data
The Rosemount 644 is a versatile temperature transmitter that delivers
field reliability and advanced accuracy and stability to meet demanding
process needs.
Transmitter features include:
HART/4-20 mA with Selectable Revision 5 and 7 selectable (Option
Code A), F
Fieldbus (Option Code F) or PROFIBUS
OUNDATION
(Option Code W)
DIN A or Rail Mount mounting styles
Dual Sensor Input (Option Code S)
SIS SIL 2 Safety Certification (Option Code QT)
LCD display suite
Local Operator Interface (Option Code M4)
–
LCD Display (Option Code M5)
–
Advanced Diagnostics (Option Codes DC and DA1)
Enhanced Transmitter Accuracy and Stability (Option Code P8)
Transmitter-Sensor Matching (Option Code C2)
Reference Manual
00809-0100-4728, Rev MB
®
PA
l = Available
– = Not Available
Head
Rail
l
l
–
l
–
l
A
F
W A
l
l
l
l
–
l
l
l
l
l
l
l
l
l
l
–
H
H
H
H
H
H
H
H
H
H
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