Description

Rosemount 644 Head Mount Temperature Transmitter

• Product: Rosemount 644 HART Temperature Transmitter (Head mount)
• Product No. : 644 ( Head Mount)
• Manufacturer : Emerson Rosemount
• Origin : Asian

Description

Rosemount 644 Head mount HART Temperature Transmitter (Rail mount) is a Versatile Temperature Transmitter that delivers field reliability and advanced accuracy and stability to meet demanding process needs. These highly accurate Rosemount 644 temperature transmitters are available in a variety of mounting styles, field housings, and communication protocols to meet your demanding installation requirements.

Features of Rosemount 644 Head Mount Temperature Transmitter:

DIN Head mount, field mount, and rail mount form factors
4-20 mA /HART® with Selectable Revisions, FOUNDATION™ fieldbus or PROFIBUS® PA Protocol support
SIL3 Capable: IEC 61508 certified by an accredited 3rd party agency for use in safety
instrumented systems up to SIL 3 [Minimum requirement of single use (1oo1) for SIL 2 and
redundant use (1oo2) for SIL 3]
Enhanced display with Local Operator Interface
LCD display
Integral Transient Protection
Enhanced accuracy and stability
Transmitter-Sensor Matching with Callendar Van Dusen constants
Variety of enclosures

Rosemount 644 Head Mount:

HART head mount and field mount
Single or Dual sensor inputs for RTD, Thermocouple, mV and Ohm
DIN A Head mount and Field mount transmitters
SIL3 Capable: IEC 61508 certified by an accredited 3rd party agency for use in safety
instrumented systems up to SIL 3 (Minimum requirement of single use [1oo1] for SIL 2 and
redundant use [1oo2] for SIL 3)
LCD display
Enhanced display with Local Operator Interface
Integral Transient Protection
Diagnostic Suite
Enhanced accuracy and stability
Transmitter-Sensor Matching with Callendar Van Dusen constants
HART rail mount
Single sensor input for RTD, Thermocouple, mV and Ohm
Custom alarm and saturation levels
Transmitter-Sensor Matching with Callendar Van Dusen constants
Hardware alarm switch

Specification:

HART, FOUNDATION fieldbus, and PROFIBUS PA
Functional specifications
Inputs
User-selectable; sensor terminals rated to 42.4 Vdc
Output
Single 2-wire device with either 4–20 mA/HART, linear with temperature or input; or completely digital outputs with FOUNDATION fieldbus communication (ITK 5.01 compliant), or PROFIBUS PA (compliant with profile 3.02).
Isolation
Input/output isolation tested to 600 Vrms.
Local display options…more

LCD display
An optional 11 digit, 2 line integral LCD display operates with a floating or fixed decimal point. It displays engineering units (°F, °C, °R, K, Ohms and mV), mA, and percent of range. The display can be configured to alternate between selected display options. Display settings are pre-configured at the factory according to the standard transmitter configuration. They can be re-configured in the field using either HART, FOUNDATION
fieldbus, or PROFIBUS PA communications.  The LOI also has optional password protection for secure operations. The LOI is only available on the 644 HART Head mount and Field mount transmitters.

Accuracy (default configuration) PT 100
HART Standard: ±0.15 °C
HART Enhanced: ±0.1 °C
FOUNDATION fieldbus: ±0.15 °C
PROFIBUS PA: ±0.15 °C

For complete datasheet: TSP Controls – Rosemount 644 Temperature Transmitter Datasheet – 1

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