Ordering Information; A.4 Ordering Information - Emerson Rosemount 644 Reference Manual

Appendix A: Specifications and Reference Data
April 2015
A.4

Ordering information

The Rosemount 644 is a versatile temperature transmitter that delivers field reliability and
advanced accuracy and stability to meet demanding process needs.
Table A-5. Rosemount 644 Smart Temperature Transmitter Ordering Information
★ 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)
F Field Mount - Single Sensor Input (HART only)
D Field 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
OUNDATION
F
Active 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
108
Transmitter features include:
HART/4-20 mA with Selectable Revisions 5 and 7 (Option Code A),

F fieldbus (Option Code F) or PROFIBUS PA (Option Code
OUNDATION
W)
DIN A Head Mount, Field Mount, or Rail Mount transmitter 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)

Integral Transient Protection (Option Code T1)

(1)
)
Reference Manual
00809-0200-4728, Rev RA
● = Available
– = Not Available
Head Rail
● ●
● –
● –
Head Rail
A F W A
● ● ● ●
● ● ● –
● ● ● ●
Specifications and Reference Data
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