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FISHER™ 3660 & 3661 Positioners

3660 Pneumatic Single-Acting Positioners/3661 Electro-Pneumatic Single-Acting Positioners can be 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.

Main Features

Accurate, Efficient, Vibration‐Resistant Operation—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
Variable Gain—Easily adjustable gain and damping adjustments fine tune the positioner stability to specific application requirements.
Versatility—Positioner accepts a standard pneumatic input signal (3660) or a standard milliampere DC input signal (3661) from a control device. This positioner provides split range capabilities and adjustable zero and spans.
Fewer Spare Parts Required—Most of the parts for 3660 and 3661 positioners are interchangeable, requiring fewer spare parts to support these positioners.
Rugged Construction—The case and cover are designed to withstand mechanical vibration and rough handling.
Easy Positioner Adjustments—Zero and span adjustments can be made with the cover in place.
Control Valve Diagnostic Testing Capability—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 3660 or 3661 positioner and the actuator.

Specifications

	3660	3661
Regional Categorization	Group II, Division 2 gases and dusts according to ATEX, Group II/Division 2 equipment according to CUTR	Intrinsically safe, non-flammable, dustproof
Certification	ATEX, CUTR, PED	CSA, FM, ATEX, IECEx, CUTR, Weight, KGS, INMETRO, RCM
Communication Protocols	3-15 or 6-30 psi, 0.2-1.0 or 0.4-2.0 bar, pneumatic signal	4-20mA
Diagnosis	without	without
Input Signal	Pneumatic	Electrical
Maximum Outlet Pressure	90 psi	90 psi
Installation Type	Actuator-mounted	Actuator-mounted
Operating Temperature	Standard temperature, high temperature	Standard temperature
Position Control	Modulation	Modulation
Security Certification	NIL	NIL
Supply Medium	Air	Air
Other Configurations	Contact your local Emerson business partner or sales office for more information on technical specifications or options for this product.

Applications

As an important supporting control component of pneumatic valve, valve positioner is widely used in petrochemical, chemical, power, metal, light industry and other fields.
Suitable for pneumatic control valve.