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Fisher™ 3661 Electro-Pneumatic Positioner
Fisher 3661 electro-pneumatic single-acting positioners are used with various actuators on sliding-stem valves for throttling applications.
These rugged positioners provide a valve position proportional to a pneumatic input or a standard millampere DC input signal received from a control device.
Fisher™ 3661 Electro-Pneumatic Positioner

Specs

Area Classification
Intrinsically Safe, Non-incendive, Dust
Certifications
CSA, FM, ATEX, IECEx, CUTR, Peso, KGS, INMETRO, RCM
Communication Protocol
4-20mA Analog
Diagnostics
No
Input Signal
Electric
Max Outlet Pressure
90 psi
Mounting Type
Actuator Mounted
Operating Temperature
Standard Temperature
Position Control
Modulating
Safety Certification
NIL
Supply Media
Air
Other Configurations
Contact your local Emerson business partner or sales office to learn about additional specifications or options for this product.

Features

  • Positioner design provides accurate, fast-responding instruments able to withstand the vibrations of most plant environments. Low steady-state air consumption contributes to efficient operation.
  • Easily adjustable gain and damping adjustments fine tune the positioner stability to specific application requirements.
  • Positioner accepts a standard milliampere DC input signal from a control device. This positioner provides split range capabilities and adjustable zero and spans.
  • Most of the parts for 3661 positioners are interchangeable; requiring fewer spare parts to support these positioners.
  • The case and cover are designed to withstand mechanical vibration and rough handling.
  • Zero and span adjustments can be made with the cover in place.
  • To support diagnostic testing of valve/actuator/positioner packages with the FlowScanner™ valve diagnostic system, connectors, piping, and other hardware can be installed between the 3661 positioner and the actuator.