Fisher 846 Electro-Pneumatic Transducer

Fisher 846 Electro-Pneumatic Transducer

The Fisher™ 846 transducer converts an electrical output signal from a controller to a pneumatic signal necessary to operate a control valve actuator or pneumatic positioner. Using electronic feedback, the transducer can correct for error-producing effects, such as variations in supply pressure and downstream leakage.

Area Classification Explosion Proof, Intrinsically Safe, Non-incendive, General Purpose, Flame Proof
Certifications CSA, FM, ATEX, IECEx, CUTR, Regional
Communication Protocol 4-20mA Analog
Data Interface Wired
Diagnostics No
Input Signal Electric
Max Outlet Pressure 35 psig
Mounting Type Remote Mount, Actuator Mount
Operating Temperature Standard Temperature
Position Control Modulating Control
Power Source Local
Supply Media Air
  • The low-mass pilot stage, mechanically damped deflector bar, and rugged construction provide stable performance in vibration.
  • Large diameter nozzles, free-flow pilot stage design, and large internal pneumatic supply passages provide excellent tolerance to reducing the effects of contaminant build-up and erosion.
  • The electronic feedback control network monitors the pneumatic output signal, detects any input-output deviations and corrects them.
  • Major mechanical and electrical components are incorporated into a single field-replaceable master module.
  • With Stroke Port, a constant bleed from the pilot stage vents through a hole in the module cover. Covering the hole increases the transducer output to confirm the proper operation of the pilot and booster stages and stroke the actuator.

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