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Programmable, Isolating, Universal Input 2-Wire Transmitter
T287

Provides an Isolated, Linearized Current Loop in Proportion to a Thermocouple, RTD, Millivolt, Potentiometer or Resistance Input in a Miniature Package

  • Universal Input Capabilities Reduces the Required Inventory Levels
  • Eliminates Ground Loops with 2000VDC Input to Output Isolation
  • Supports Single or Dual Inputs
  • User-Friendly Configuration via Windows Based Software Provides Full Programmability for Sensor Type and Input Range
  • Custom Linearization Capabilities for Special T/C Types
  • DIN Rail Mounting Adapter Included
  • Datasheet
  • Installation Guide

The Model T287 is a programmable two-wire transmitter that is configured to provide an isolated 4-20mA signal in proportion to the desired input signal. The T287 accepts thermocouple, 2-, 3-, or 4-wire RTD, potentiometer, resistance and millivolt inputs. The T287 is capable of supporting either single or dual inputs. In the dual input mode, either input can be selected to control the output or math functions can be applied where both inputs have an effect on the output. The functions available are Sum, Difference, Average, Higher of the two or Lower of the two inputs. Typical applications include providing accurate, stable signals to distributed control systems (DCS), supervisory control and data acquisition systems (SCADA), environmental monitoring and control systems (EMCS), data acquisition and control systems (DACS) and custody transfer/pipeline systems.

Configuration is performed by connecting the transmitter to a standard PC serial port, (9-pin RS-232) using an isolated interface adapter, and running a user-friendly, Windows-based program. Unique technology in the T287 allows all configuration information to be defined and modified with only a PC, the interface adapter, and the transmitter. No loop supply, input simulation or meter on the output is required. The fully isolated adapter reduces the risk of expensive damage to the PC which can be caused by spikes and surges on field wiring entering the computer via its unprotected serial port.

The T287 utilizes state of the art microprocessor technology that yields higher accuracy and long-term stability with lower power consumption than prior generation transmitters. The T287 automatically performs frequent self-tests and auto-calibration while in service, resulting in very stable, long-term performance. The stability of the T287 is greater than 0.1% of span over 12 months.

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