Description
Engineered for versatility, the Rosemount 644 Temperature Transmitter is available with HART™, FOUNDATION™ Fieldbus or PROFIBUS™ protocols in head, field or rail mount styles and a variety of enclosure options. By adding a Local Operator Interface (LOI), you can update your transmitter configuration in the field without tools. For diverse application requirements, this transmitter includes diagnostic capabilities, such as Hot Backup™ capability, sensor drift alert and thermocouple degradation. Input: Dual and single sensor capability with universal sensor inputs (RTD, T/C, mV, ohms) Output Signal: 4-20 mA /HART™ protocol, FOUNDATION™ fieldbus protocol, PROFIBUS™ PA protocol Housing: Field mount, DIN A head mount or rail mount Display/Interface: LCD Display, LCD Display with Local Operator Interface (LOI), or LED Diagnostics: Basic diagnostics, Hot Backup™ capability, sensor drift alert, thermocouple degradation, min/max tracking Calibration Options: Transmitter-sensor matching (Callendar-Van Dusen constants), 5-point calibration Certifications/Approvals: SIL 2/3 certified to IEC 61508 by an independent 3rd party, hazardous location, marine type, see full specs for complete list of certifications
