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Product Specifications I/A Series® Intelligent

PSS 2A-1F4 A

Temperature Transmitter Model RTT20 Transmitter with Analog 4 to 20 mA Output, or with FoxCom or HART Communication Protocol

The Model RTT20 Intelligent Temperature Transmitter receives input signals from RTDs, thermocouples, ohms sensors, or dc mV sources. It transmits a 4 to 20 mA output (with no remote communications), asmart version with HART communications, or an intelligent version with software selectable 4 to 20 mA or FoxCom® digital for integration with I/A Series Systems. Remote communication and database configuration is provided by a handheld communicator, a PC-based configurator, or an I/A Series System. • 4 to 20 mA, HART, or FoxCom Digital Output • Field-proven microprocessor-based transmitter •Superior Accuracy • Long-Term Stability • Multiple Packaging Configurations offered, including Pipe or Surface Mounting, DIN Rail Mounting, Integral Bare Sensor, and Integral Sensor with Thermowell • One Unit Configurable for all T/C, RTD, mV, Ohm, and Dew Point Inputs. Custom Inputs can also be accommodated. • Available as a Basic Unit, or in Aluminum or 316 ss Enclosure. Enclosure is Explosionproofand meets NEMA 4X and IEC IP66. • Automatic Self-Diagnostics and Self-Calibration • Configurable Failsafe Value • Optional Three-Line Integral, Plug-in LCD Indicator/Configurator • Wide Selection of Thermowell Configurations • RFI, Voltage Surge, and Reverse Polarity Protection • Conforms to Applicable European Union Directives (Product marked with “CE” Logo) • NAMUR Compliant Failure Current •Transmitter complies with EMC (ElectroMagnetic Compatibility) Directives • Approved/Certified by many Testing Agencies for Hazardous Area Installations • Standard 2-Year Warranty

PSS 2A-1F4 A Page 2 GENERAL DESCRIPTION The RTT20 provides a wide range of packaging, sensor types, and options along with three choices of output signals, 4 to 20 mA, smart HART, and Intelligent, making thistransmitter suitable for virtually all temperature measurement applications. The microprocessor-based electronics eliminates ambient temperature effects and results in high accuracy, repeatability and linearization of the sensor signal. Ease of mounting and installation makes these transmitters an extremely attractive offering. INTELLIGENT TRANSMITTER FAMILY The RTT20 Temperature Transmitter is designedfor single measurements, but can be configured for dual 2-wire RTDs. However, for dual thermocouples, or dual 3- or 4-wire RTDs, the Model RTT25 is the correct choice. The Model RTT25 Temperature Transmitter is available with FOUNDATION Fieldbus Communication Protocol (refer to PSS 2A-1F4 C). EFFICIENT AND DURABLE Industrial-grade integrated circuits and sealed electronics combine to make thismicroprocessorbased transmitter an efficient and durable device. MULTIPLE PACKAGING CONFIGURATIONS The transmitter (Figure 1) is suitable for use in a variety of applications. Transmitters with integrally mounted sensor have an environmentally protected enclosure and are mounted directly to the process. Surface- and pipe-mounted configurations allow the transmitter to be mounted remotely from theprocess. The transmitter is also available with DIN-mounting hardware, and as a basic transmitter package. Built-in protection from vibration and radio frequency interference (RFI) are also provided.
DIN RAIL MOUNT

REMOTE COMMUNICATIONS This high-performance temperature transmitter can be ordered with or without remote communications, making it ideal for use in new process applications and forupgrading existing applications. Remote communication is available in either Intelligent FoxCom or HART communication protocols. INPUT TYPES This RTT20 Intelligent Temperature Transmitter can be used with a wide variety of temperature sensors, including two, three, and four-wire RTDs, all popular thermocouples, and other resistance and millivolt input devices. The following is a general list of...