Acromag TT230 series isolated transmitters

The Acromag TT230 series of isolated transmitters is designed to provide easier installation and set-up. The signal conditioners are only 12.5 mm wide for high-density mounting on DIN rails and provide a convenient USB connection to a PC for simple, precise configuration using Windows software.

A number of models are available to isolate and convert thermocouple, RTD, voltage or current input signals to a 4-20 mA output. These 2-wire instruments are loop powered and support both source or sink output wiring connections on the current loop with a 12-32 VDC supply. A ruggedised design features -40 to 80°C operation, electrical noise immunity and surge protection.

The series’ signal conditioning technology includes simple USB configuration and a universal sink/source 4-20mA output to accommodate virtually any process measurement/control application. All units support both 4-20 mA sinking (2-wire) and sourcing output (3-wire) device wiring to eliminate confusing model selection.

Each model accommodates a variety of signal types. Thermocouple units accept eight different sensor types (J, K, T, R, S, E, B, N), as well as ±100 mV inputs. RTD units accommodate 2-, 3- and 4-wire 100 Ω platinum sensors or 0-900 Ω linear-resistance inputs. Voltage models convert bipolar signals from ±10 mV to ±150 V DC with multiple selectable ranges. The current units are widely adjustable to support ±20, 0-20 and 4-20 mA DC input signals.

All models are said to deliver high accuracy, good noise resistance and fast response times. They also demonstrate good linearity and stability with low temperature drift. Software calibration eliminates zero/span pots, DIP switches and push-buttons for easy programming of ranges, over/under scale thresholds and fail-safe settings.

Other features add greater flexibility. Programmable over/under range and fault/alarm levels enable identification of a 'runaway' process or broken sensor. Selectable up/downscale fail-safe modes ensure a safe, predictable shutdown with a NAMUR-compliant fault response.