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Dataforth Corporation, Tucson, AZ, offers a DSCT series of loop powered 2-wire transmitters that includes seven family groups and 48 transmitter models. These 2-wire transmitters interface to a wide variety of voltage, current, temperature and position measuring devices and provide Instrument Class^® performance. Superior specifications include as ±0.03% accuracy, ±0.01% linearity, five poles of filtering, 1500Vrms continuous isolation, and low output noise.

The DSCT 2-wire transmitter conditions and sends analog signals from sensors located in the field to monitoring and control equipment, usually computers, located thousands of feet away in central control areas. The DSCT accepts a wide range of inputs, including millivolt, volt, milliamp, thermocouple, RTD, potentiometer, and slidewire. It operates on power from a 2-wire signal loop and modulates the supply current to represent the input signal within a 4 to 20mA range.

Download the DSCT family of DIN Rail 2-Wire Transmitters Datasheet.

Two-wire transmission loops are a very economical method for connecting sensors to distant control rooms. Since the DSCT operates from the signal loop current, no additional, expensive power or wiring is required. Only low cost, twisted pair wiring is needed.

The DSCT employs a proprietary isolation barrier to isolate the sensor signal from the current loop, eliminating ground loops, permitting the grounding of both the sensor and the receiver, and protecting valuable control equipment from damage due to field power surges and lightning strikes. The transmitted 4 to 20mA signal is also virtually immune to noise pick-up and interference and is independent of any resistance in the loop wires. This combination of conditioning and transmission results in greater signal integrity and protection of system investment. Appropriate certification approvals are in process to allow operation in hazardous locations.

Additional features include:

• 160dB CMR
• ANSI/IEEE C37.90.1 Transient Protection
• Wide Range Loop Supply Voltage, 10.8V to 60V
• Input and Output Protection to 240VAC Continuous
• CE Compliant
• CSA and FM Approvals Pending
  

Operation and storage temperature is -40°C to +80°C, and relative humidity range is zero to 95% noncondensing. All models meet the requirements of EN50081-1 (radiated/conducted emissions) and EN50082-1 (ESD/RF/EFT immunity).

The DSCT is packaged in a rugged thermoplastic DIN rail mountable case measuring 2.95" x 0.89" x 4.13" (75mm x 22.5mm x 105mm). The material provides excellent impact properties, dimensional stability over temperature, chemical resistance, and a flammability rating of V-0. For ease of system assembly and reconfiguration, all signal lines are secured to the module using screw terminals integral with pluggable terminal blocks. The modules can be mounted on standard DIN EN50022-35x7.5 or -35x15 rails.

Dataforth was established in 1984 and is the world leader in data acquisition, signal conditioning and data communication products for industrial applications. Worldwide, our electronic data acquisition, signal conditioning, and data communication products provide rugged signal and data integrity and wide spectrum accuracy.

For additional information, call 800-444-7644 toll-free, email sales@dataforth.com, or visit our website at www.dataforth.com.