• Protocontrol Instruments (India) Private Limited

Signal Converters, Isolators and Transmitters

Signal Converters, Isolators and Transmitters are used to isolate and convert field signals like Resistance, Current, Voltage, and Frequency to 4-20 mA. A signal converter converts the field signals received from sensors like RTDs, thermocouples, load cells and strain gauges to standard 4-20 mA form which is acceptable for a PLC or DCS for further processing. Transmitters are generally head mounted and fitted in the head of temperature sensor. Isolators provide further isolation of field signal so that PLC side is isolated from field side. Many signals are not isolated from input and not suitable for transmission over long distances. Converters are specially designed to overcome these problems in transmission such as line drop, interference, ground looping and non compatibility to standard processing unit.
Models are available:

• SC IIID: Signal c­onverter, DIN rail mounting, 4-20 mA I/P, 4-20 mA O/P
• ST N2PI: Temperature transmitter, head mounting, RTD I/P, 4-20 mA O/P, loop powered.