Data Sheet

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Fisher

3660 and 3661 Positioners

Fisher 3660 pneumatic and 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.

Features

n 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.

n Variable Gain—Easily adjustable gain and damping

adjustments fine tune the positioner stability to

specific application requirements.

n 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.

n Fewer Spare Parts Required—Most of the parts for

3660 and 3661 positioners are interchangeable,

requiring fewer spare parts to support these

positioners.

n Rugged Construction—The case and cover are

designed to withstand mechanical vibration and

rough handling.

W7174

Fisher 3660 Positioner with

Baumannt Valve and Actuator

n Easy Positioner Adjustments—Zero and span

adjustments can be made with the cover in place.

n Control Valve Diagnostic Testing Capability—To

support diagnostic testing of

valve/actuator/positioner packages with the

FlowScannert valve diagnostic system,

connectors, piping, and other hardware can be

installed between the 3660 or 3661 positioner and

the actuator. A typical connector installation is

shown in figure 4.

3660 and 3661 Positioners

D101407X012

Product Bulletin

62.1:3660

May 2012

Summary of content (12 pages)

PAGE 1
Product Bulletin 3660 and 3661 Positioners 62.1:3660 May 2012 D101407X012 FisherR 3660 and 3661 Positioners Fisher 3660 pneumatic and 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.
PAGE 2
Product Bulletin 3660 and 3661 Positioners 62.1:3660 May 2012 D101407X012 Specifications Positioner Adjustments Available Configuration Span: Adjustable from 19 mm to 50 mm (0.75 to 2 inches) stem travel Zero: 0 to 100% Gain: 0.5 to 6% PB (proportional band)(3). Output Volume Damping: Loop dynamic response adjustment 3660: Single‐acting pneumatic valve positioner 3661: Single‐acting electro‐pneumatic valve positioner Input Signal 3660: J 0.2 to 1.0 bar (3 to 15 psig), J 0.4 to 2.
PAGE 3
Product Bulletin 3660 and 3661 Positioners 62.1:3660 May 2012 D101407X012 Specifications (continued) Hazardous Area Classification for 3661 CSA—Intrinsically Safe, Type n, Non‐incendive FM—Intrinsically Safe, Type n, Non‐incendive ATEX—Intrinsically Safe, Type n (Gas Atmospheres Only) IECEx—Intrinsically Safe, Type n (Gas Atmospheres Only) Refer to tables 6, 7, 8, and 9 for additional information Conduit Connection for 3661 Housing Classification for 3661 CSA—Type 3 Encl.
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Product Bulletin 3660 and 3661 Positioners 62.1:3660 May 2012 D101407X012 Figure 1.
PAGE 5
Product Bulletin 3660 and 3661 Positioners 62.1:3660 May 2012 D101407X012 Table 2. Standard and Split Range Capabilities POSITIONER 3660 3660 Split 0.2 to 1.0 bar (3 to 15 Psig) Input Signal 0.4 to 2.0 bar (6 to 30 Psig) Input Signal Bar Psig Psig 3661 4 to 20 mA DC Input Signal Bar One Way 1:1 0.2 to 1.0 3 to 15 6 to 30 0.4 to 2.0 4 to 20 Two Way 2:1 0.2 to 0.6 0.6 to 1.0 3 to 9 9 to 15 6 to 18 18 to 30 0.4 to 1.2 1.2 to 2.0 4 to 12 12 to 20 0.2 to 0.5 0.5 to 0.8 0.8 to 1.0 0.
PAGE 6
Product Bulletin 3660 and 3661 Positioners 62.1:3660 May 2012 D101407X012 Principle of Operation once again in equilibrium but at a higher instrument pressure, a slightly different flapper position, and a new actuator stem position. Refer to figure 2 for operational schematic. A decrease in instrument pressure decreases nozzle pressure, which allows the relay to bleed off actuator loading pressure.
PAGE 7
Product Bulletin 3660 and 3661 Positioners 62.1:3660 May 2012 D101407X012 Figure 3. Positioner Dimensions and Connections (see table 5 for the X dimension) ACTUATOR POST CENTERLINE 191.2 (7.53) 93 49 (3.66) (1.93) 34.32 (1.35) 49.2 (1.94) 67.5 (2.66) 0.5 (0.02) DIM X 1/4 NPT SUPPLY CONNECTION ACTUATOR CENTERLINE 30 (1.18) 122.3 (4.81) 30 (1.18) 21.5 (0.85) 1/4 NPT INSTRUMENT CONNECTION ACTUATOR POST CENTERLINE 142.2 (5.60) 34.32 (1.35) 49.2 (1.94) 67.5 (2.66) 93 (3.
PAGE 8
Product Bulletin 3660 and 3661 Positioners 62.1:3660 May 2012 D101407X012 Ordering Information Table 5. Dimension X for figure 3 ACTUATOR CENTERLINE TO POSITIONER Type Size 657/667 1250 3024S Baumann GX X mm Inch 30 34 40 45/46 50/60 92.2 95.3 104.9 108.0 128.5 3.63 3.75 4.13 4.25 5.06 225 450 675 1.21 1.31 1.41 16in2 32in2 54in2 70in2 86.0 86.0 110.0 83.5 87.5 87.5 53.8 71.4 71.4 71.4 3.39 3.39 4.33 3.29 3.44 3.44 2.12 2.81 2.81 2.81 225 750 1200 81.0 81.0 81.0 3.19 3.19 3.
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Product Bulletin 3660 and 3661 Positioners 62.1:3660 May 2012 D101407X012 Figure 4.
PAGE 10
Product Bulletin 3660 and 3661 Positioners 62.1:3660 May 2012 D101407X012 Table 6. Fisher 3661 Positioner Hazardous Area Classifications—CSA (Canada) Certification Body Certification Obtained Intrinsically Safe Ex ia IIC T4/T5/T6 per drawing GE28591 CSA Class I, II Division 1 GP A,B,C,D,E,F,G T4/T5/T6 per drawing GE28591 Type n(1) Zone Ex nA IIC T6 Class I Division 2 GP A,B,C,D T6 Entity Rating Vmax = 30 VDC Imax = 150 mA Pi = 1.
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3660 and 3661 Positioners D101407X012 Product Bulletin 62.
PAGE 12
Product Bulletin 62.1:3660 May 2012 3660 and 3661 Positioners D101407X012 Neither Emerson, Emerson Process Management, nor any of their affiliated entities assumes responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user. Fisher, Baumann, and FlowScanner are marks owned by one of the companies in the Emerson Process Management business unit of Emerson Electric Co.