Filter
Top Products
Reference Manual
00809-0400-4728, Rev AA
June 2011
Rosemount 644
www.rosemount.com
Appendix A Specifications and
Reference Data
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-1
Foundation Fieldbus Specifications . . . . . . . . . . . . . . . . . page A-4
Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-6
Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-9
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-12
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-17
SPECIFICATIONS
Functional Inputs
User-selectable; sensor terminals rated to 42.4 Vdc. See “Accuracy” on
page A-6 for sensor options.
Output
Single 2-wired device with a completely digital output with F
OUNDATION
fieldbus communication (ITK 5.1 compliant).
Isolation
Input/output isolation tested to 500 Vdc/ac rms (707 Vdc) at 50/60 Hz
Local Display
The optional five-digit integral LCD Display includes a floating or fixed decimal
point. It can also display engineering units (°F, °C, °R, K, , and millivolts),
milliampere, and percent of span. The display can be configured to alternate
between selected display options. Display settings are preconfigured at the
factory according to the standard transmitter configuration. They can be
reconfigured in the field using F
OUNDATION fieldbus communications.
Humidity Limits
0–99% relative humidity
Update Time
0.5 seconds
Accuracy
(default configuration) PT 100
FOUNDATION fieldbus: ±0.15 °C