Applied Control - Emerson Impact Partner

Electro-Pneumatic Transducers

Eelctro-pneumatic transducers and Current-to-pneumatic (I/P) transducers blend an innovative I/P conversion technology with proven pneumatic instrumentation designs. They combine the best ideas of how to shrug off pipeline vibration and shock with field-proven ways to operate accurately and efficiently.

Fisher® 546, 546S, and 546NS Electro-Pneumatic Transducer
Instruction Manual – 546
Instruction Manual – 546NS
Product Bulletin
Fisher® 546, 546S, and 546NS transducers receives a direct-current input signal and use a torque motor, nozzle-flapper, and pneumatic relay to convert the signal to a proportional pneumatic output signal. Nozzle pressure, which operates the relay, is also piped to the torque motor feedback bellows. This provides a comparison between input signal and nozzle pressure and corrects errors in nozzle pressure.
Fisher® 646 Electro-Pneumatic Transducer
Instruction Manual Product Bulletin
Fisher® 646 electro-pneumatic transducers use a patented converter module that converts a 4 to 20 milliampere input signal to a proportional 0.2 to 1.0 bar (3 to 15 psig) pneumatic output signal. Small size. Vibration resistance. High output capability. Low air consumption.
Fisher® 846 Electro-Pneumatic Transducer
Instruction Manual Product Bulletin
Fisher® 846 electro-pneumatic transducer accepts an electrical input signal and converts it to a pneumatic output signal. The transducer includes a patented deflector/nozzle design that consists of two nozzles positioned so that the constant air flow exiting the supply nozzle. Vibration resistant and tolerant of dirty supply air.
Fisher® i2P-100 Electro-Pneumatic Transducer
Instruction Manual Product Bulletin
Fisher® i2P-100 electro-pneumatic transducer uses a patented converter module that converts a milliampere input to a proportional pressure output. Both the current input and pressure output range are user-configurable in the field. The converter module uses small parts of minimum mass, which are balanced symmetrically around a pivot point at the center of the mass. This balanced arrangement results in a high performance instrument that reduces sensitivity to vibration. An integral pneumatic relay provides the high capacity necessary to drive pneumatic control valve/actuator assemblies without additional boosters or positioners. The transducer also provides stable, accurate operation when its output is transmitted to small volume chambers, such as a pneumatic positioner or other pneumatic instrument. Reduced sensitivity to vibration, combined with high capacity and first order lag characteristics, make the i2P-100 transducer suitable for direct mounting on control alve/actuator combinations.
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