Electro−Pneumatic Transducer

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Fisherr 3311 ElectroPneumatic Transducer

The Fisher 3311 electro

pneumatic transducer(figure 1) is a rugged, fieldmountable transducerthat accepts an electrical input signal and converts itto a pneumatic output signal. Typically, the 4 to 20mA is converted to 0.2 to 1.0 bar (3 to 15 psi). In themost common application, the transducer convertsan electrical output signal from a controller to apneumatic signal necessary to operate a controlvalve actuator or pneumatic positioner.

The transducer includes a deflector/nozzle design(figure 2) that consists of two nozzles positioned sothat the constant air flow exiting the supply nozzle isdirected at the entrance of the receiver nozzle. Each

nozzle has a large bore of 0.41 mm (0.016 inches),which provides good resistance to plugging. Theinput current signal positions a deflector bar withinthe nozzles flow stream. As the input signal

changes, the deflector bar moves to alter the flowstream to the receiver nozzle, establishing a pilotpressure at the receiver nozzle. The pilot pressure,in turn, controls the booster stage and output of thetransducer.

An electronic feedback control network constantlycompares the value of the pneumatic output signalwith the input current signal. A solidstate pressuresensor is part of the electronics package monitoringthe pneumatic output (figure 4). A comparator circuitin the control network detects inputoutputdeviations and adjusts the output by moving thedeflector in the pilot stage to a corrected position.

Because of this feedback network, the transducercan correct for errorproducing effects such asvariations in supply pressure and downstreamleakage.

W8293

W63071 / IL

3311 MOUNTEDON FISHER 667 ACTUATOR

3311 ELECTRO-PNEUMATICTRANSDUCER

Figure 1. Fisher 3311 ElectroPneumatic Transducer

Product Bulletin62.1:3311D102127X012May 2010 3311 Transducer


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3311 TransducerProduct Bulletin

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Specifications

Input Signal

420 mA DC, field adjustable split ranging.

Equivalent Circuit

See figure 5

Output Signal

Standard Performance: J 0.2 to 1.0 bar (3 to 15psi). Rangeability between 0.1 to 1.2 bar (1 and18 psi)Multirange Performance: J 0 to 1.2 bar (0 to 18psi), J 0.4 to 2.0 bar (6 to 30 psi), and J 0 to 2.3bar (0 to 33 psi) nominal ranges. Actual

rangeability available between 0.03 to 2.3 bar (0.5and 33 psi)Action:J Direct (increasing input signalincreases transducer output) (Minimum span,6 psi) or J Reverse (increasing input signaldecreases transducer output) (Minimum span,11 psi)

Supply Pressure

Standard Performance: 1.2 to 1.6 bar(18 to 24 psi)Multirange Performance:Minimum: 0.2 bar (3 psi) [0.14 bar (2 psi) for a

2.3 bar (33 psi) output] greater than the maximumcalibrated output pressure.Maximum: 2.4 bar (35 psi)

Medium: Air or natural gas

Air Quality:Supply pressure must be clean, dryair that meets the requirements of ISA Standard7.0.01. A maximum 40 micrometer particle size inthe air system is acceptable. Further filtrationdown to 5 micrometer particle size isrecommended. Lubricant content is not to exceed1 ppm weight (w/w) or volume (v/v) basis.Condensation in the air supply should be

minimized.

Natural Gas:Natural gas must be clean, dry,oilfree, and noncorrosive. H2S content shouldnot exceed 20 ppm. Natural gas as the supplymedium is only approved for CSA and FMapprovals, as specified in tables 2 and 3. The3311 is not recommended for use with aromaticgas.

SteadyState Air Consumption(1)

0.3 normal m3/hr (12 scfh) at 1.4 bar (20 psi)

supply pressure.

Output Air Capacity(1)

Standard Performance: 6.4 normal m3/hr (240scfh) at 1.4 bar (20 psi) supply pressure.Multirange Performance: 9.7 normal m3/hr (360scfh) at 2.5 bar (35 psi) supply pressure

Temperature Limits

Operating:40 to 85_C (40 to 185_F).Storage:40 to 93_C (40 to 200_F).

Humidity Limits

0100% condensing relative humidity.

Performance(2)

Linearity, Hysteresis, and Repeatability:

"0.3% of span.

Temperature Effect (total effect including zero

and span):"0.07%/_C (0.045%/_F) of span

Vibration Effect:"0.3% of span per g during thefollowing conditions:

515 Hz at 4 mm constant displacement15150 Hz at 2 g. 1502000 Hz at 1 g.

per SAMA Standard PMC 31.1, Sec. 5.3,Condition 3, Steady State.

Shock Effect:"0.5% of span, when tested perSAMA Standard PMC 31.1, Sec. 5.4.

Supply Pressure Effect:NegligibleElectromagnetic Interference (EMI):Tested perIEC 61326-1 (Edition 1.1). Meets emission levelsfor Class A equipment (industrial locations) andClass B equipment (domestic locations). Meetsimmunity requirements for industrial locations(Table A.1). Immunity performance is shown intable 1.

Leak Sensitivity: Less than 1.0% of span for up

to 4.8 normal m3/hr (180 scfh) downstreamleakage.

Overpressure Effect: Less than 0.25% of spanfor misapplication of up to 7.0 bar (100 psi) supplypressure for less than 5 minutes to the input port.

Reverse Polarity Protection: No damage occursfrom reversal of normal supply current (420 mA)or from misapplication of up to 100 mA.

continued


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3311 Transducer

Product Bulletin62.1:3311May 2010

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Specifications (Continued)

Connections

Supply and Output Pressure: 1/418 NPT

internal connection.Electrical:1/214 NPT internal conduitconnection.

Adjustments

Zero and Span: Screwdriver adjustments locatedin terminal compartment.

Remote Pressure Reading (optional)

ON or OFF; jumper selectableFrequency Range: 5,0008,000 Hz.Amplitude: 0.41.0 Vpp

Required Operating Voltage

Min. 6.0 V (at 4 mA)Max. 7.2 V (at 20 mA)

with Remote Pressure Reading ONMin. 6.4 V (at 4 mA)Max. 8.2 V (at 20 mA)

Electrical Classification

Hazardous Area

CSAIntrinsically Safe, Flameproof, Div. 2

FMIntrinsically Safe, Flameproof, Dust

IgnitionProof

ATEXIntrinsically Safe & Dust, Flameproof &Dust, Type n & Dust

IECExIntrinsically Safe & Dust, Flameproof &Dust, Type n & Dust

GOSTIntrinsically Safe, Flameproof, Type nRefer to tables 2, 3, 4, 5, and 6 for additionalinformation.

Electrical Housing:

CSAType 4X

FMNEMA 4X

ATEXIP66

IECExIP66

Tropicalization (Fungus test per MILSTD810)

Construction Materials

Housing: J Low

copper aluminum withpolyurethane paint, or J CF8MORings:Nitrile, except silicone for sensorOrings.

Mounting

J Actuator, J pipestand, or J surface

Weight

Aluminum: 2.9 kg (6.5 lb) excluding optionsStainless Steel: 6.7 kg (14.8 lb) excludingoptions

Options

J Fisher 67CFR filter regulator, J supply andoutput gauges, J remote pressure reading, orJ stainless steel mounting bracket

NOTE: Specialized instrument terms are defined in ANSI/ISA Standard 51.1 Process Instrument Terminology1. Normal m3/hr: normal cubic meters per hour (m3/hr, 0_C and 1.01325 bar, absolute). Scfm: standard cubic feet per minute (ft3/min, 60_F and 14.7 psig).2. Performance values are obtained using a transducer with a 4 to 20 mA dc input signal, a 3 to 15 psig output, and 20 psig supply pressure.

Table 1. EMC Immunity Performance Criteria

Port Phenomenon Basic Standard Test Level Performance Criteria(1)

Enclosure

Electrostatic discharge (ESD) IEC 61000

4

2

4 kV contact

8 kV air A

Radiated EM field IEC 610004380 to 1000 MHz @ 10V/m with1 kHz AM at 80%

A

Rated power frequencymagnetic field

IEC 6100048 60 A/m at 50 Hz A

I/O signal/control

Burst (fast transients) IEC 6100044 1 kV A

Surge IEC 6100045 1 kV (line to ground only, each) B

Conducted RF IEC 6100046150 kHz to 8 MHz at 3 Vrms B

8 MHz to 80 MHz at 3 Vrms A

Specification limit = 1% of span1. A = No degradation during testing. B = Temporary degradation during testing, but is selfrecovering.


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Features

D Vibration ResistantThe lowmass pilotstage, mechanically damped deflector bar, and

rugged construction provide stable performance invibration.

D Large Diameter NozzlesLarge diameternozzles, freeflow pilot stage design, and largeinternal pneumatic supply passages provideexcellent tolerance to reducing the effects ofcontaminant buildup and erosion.

D Increased Accuracy, Reduced Sensitivity toSupply Pressure Variations and Downstream

LeakageThe electronic feedback control networkmonitors the pneumatic output signal, detects anyinputoutput deviations and corrects them. Thisprovides very high accuracy and allows thetransducer to sense changes in the final elementcondition and rapidly optimize its air delivery.

D Easy MaintenanceMajor mechanical andelectrical components are incorporated into a singlefieldreplaceable master module (figure 3). Thetransducer does not have to be removed from itsmounting to facilitate troubleshooting or service. Aseparate field wiring compartment eases installation

and maintenance.

W6287 / IL

Figure 2. Detail of Deflector/Nozzle Pilot Stage

D Quick Diagnostic Checks and RemotePerformance MonitoringWith Stroke Port, aconstant bleed from the pilot stage vents through ahole in the module cover. Covering the holeincreases the transducer output to confirm theproper operation of the pilot and booster stages andstroke the actuator. With optional Remote PressureReading, a frequency directly proportional to theoutput pressure is superimposed on the input signalwires.

Using a 275 HARTt Communicator or frequencycounter, an operator can monitor the 3311 output

pressure.


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67(2.62)

COVER REMOVALCLEARANCE

59(2.31)

68(2.69)

78(3.08)

29(1.13)

5/16183 PLACES

137(5.38)

MODULE COVERREMOVAL CLEARANCE

156(6.15)

119(4.68)

1/418 NPTSUPPLY CONN

168(6.60)

129(5.07)

1/418 NPTOUTLET CONNPLUGGED WHENGAUGE NOTFURNISHED

5.43(138)

1/214 NPTCONDUIT CONN

1/418 NPTOUTLET CONN

mm(INCH)

14B7364C

Figure 6. Dimensions


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3311 Transducer


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FOR PROPER MOISTURE

DRAINAGE THIS END

MUST BE UP

67(2.62)


13(0.50)

78(3.08)

CENTERLINE OF ACTUATOR

6(0.25)

191(7.51)

YOKE MOUNTED

NOTE:

THE MOUNTING POSITIONS SHOWN ALLOW ANY MOISTURE BUILDUP IN THE TERMINAL COMPARTMENT

TO DRAIN TO THE SIGNAL WIRE CONDUIT ENTRANCE. DO NOT MOUNT THE TRANSDUCER WITH THE TERMINAL

COMPARTMENT COVER ON THE BOTTOM; MOISTURE MAY ACCUMULATE IN THE TERMINAL COMPARTMENT

OR PILOT STAGE, PREVENTING PROPER TRANSDUCER OPERATION. THE VERTICAL MOUNT IS MOST EFFECTIVE

FOR MOISTURE DRAINAGE IN WET APPLICATIONS.

1

14B7361D

mm(INCH)

1

MODULECOVERREMOVALCLEARANCE

137(5.38)

Figure 7. Dimensions with Optional Fisher 67 FilterRegulator (Yoke Mounted)


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NOTES:THE MOUNTING POSITIONS SHOWN ALLOW ANY MOISTURE BUILDUP IN THE TERMINAL COMPARTMENT

TO DRAIN TO THE SIGNAL WIRE CONDUIT ENTRANCE. DO NOT MOUNT THE TRANSDUCER WITH THE TERMINALCOMPARTMENT COVER ON THE BOTTOM; MOISTURE MAY ACCUMULATE IN THE TERMINAL COMPARTMENTOR PILOT STAGE, PREVENTING PROPER TRANSDUCER OPERATION. THE VERTICAL MOUNT IS MOST EFFECTIVEFOR MOISTURE DRAINAGE IN WET APPLICATIONS.

1

FOR PROPER MOISTURE

DRAINAGE THIS END

MUST BE UP

10/.38MOUNTING HOLE4 PLACES

137(5.38)

222(8.76)

67

(2.62)

COVER REMOVAL

CLEARANCE

89(3.50)

19(0.76)

89(3.50)

13(0.50)

61(2.39)

MODULE COVERREMOVAL CLEARANCE

14B7332D

SURFACE/WALL MOUNTED

mm(INCH)

1

Figure 8. Dimensions with Optional Fisher 67 FilterRegulator (Surface/Wall Mounted)

Installation

The transducer may be actuator, wall, panel, orpipestand mounted. Dimensions are shown infigures 7, 8, and 9.

Ordering Information

To determine what ordering information is required,refer to the specification table. Carefully review thedescription of each specification. Specify the desiredchoice whenever there is a selection available.

When ordering mounting parts, specify actuator,surface, or pipestand mounting. For actuator

mounting, specify the actuator type, size, travel, anddiaphragm pressure range. For all 657 and 667actuators except size 80, specify whether actuatoryoke or actuator casing mounting is desired (yokemounting only is available on size 80 actuators).

Note

Neither Emerson, Emerson ProcessManagement, nor any of their affiliatedentities assumes responsibility for theselection, use, or maintenance of anyproduct. Responsibility for theselection, use, and maintenance of anyproduct remains with the purchaserand end user.


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3311 Transducer


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67(2.62)


54(2.51)

MODULECOVERREMOVALCLEARANCE

FOR PROPER MOISTURE

DRAINAGE THIS END

MUST BE UP

14B7363D

137(5.38)

PIPE STAND MOUNTED

210(8.27)

148(5.82)

156(6.15)

67CFR1/418 NPTSUPPLY CONN

mm(INCH)

1

NOTES:THE MOUNTING POSITIONS SHOWN ALLOW ANY MOISTURE BUILDUP IN THE TERMINAL COMPARTMENT

TO DRAIN TO THE SIGNAL WIRE CONDUIT ENTRANCE. DO NOT MOUNT THE TRANSDUCER WITH THE TERMINALCOMPARTMENT COVER ON THE BOTTOM; MOISTURE MAY ACCUMULATE IN THE TERMINAL COMPARTMENTOR PILOT STAGE, PREVENTING PROPER TRANSDUCER OPERATION. THE VERTICAL MOUNT IS MOST EFFECTIVEFOR MOISTURE DRAINAGE IN WET APPLICATIONS.

IF MOUNTED ON HORIZONTAL PIPE, THE I/P MUST BE ON TOP OF THE PIPE FOR PROPER MOISTURE DRAINAGE.

1

2

260(2.38)

13(0.50)

262(10.31)



1/214 NPTOUTLET CONNPLUGGED WHENGAUGE NOTFINISHED

Figure 9. Dimensions with Optional Fisher 67 FilterRegulator (Pipe Stand Mounted)


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Table 2. Hazardous Area Classifications for CanadaCSA

Certification Body Certification Obtained Entity Rating Temperature Code Enclosure Rating

CSA

Intrinsically SafeEx ia Intrinsically Safe

Class I Division 1 Groups A,B,C,D T4per drawing GE27760Approved for use with natural gas

T4 (Tambv40_C) TYPE 4X

Explosion ProofClass I Division 1 Groups C,DApproved for use with natural gas

T4 (Tambv 80_C) TYPE 4X

Class I, Division 2, Groups A,B,C,DClass II, III Division 1, Groups E,F,GApproved for use with natural gas

TYPE 4X

Table 3. Hazardous Area Classification for United StatedFM

Certification Body Certification Obtained Entity Rating Temperature Code Enclosure Rating

FM

Intrinsically SafeClass I, II, III Division 1 Groups A,B,C,D,E,F,G perdrawing GE27760

Approved for use with natural gas

Vmax = 40 VDCImax = 185 mACi = 0.016 mF

Li = 20 mH

T5 (Tambv 60_C) NEMA 4X

Explosion ProofClass I, Division 1, Groups B,C,DApproved for use with natural gas Groups C,Donly


Class I, Division 2, Groups A,B,C,DClass II, III Division 1, Groups E,F,GNot approved for use with natural gas


Table 4. Hazardous Area ClassificationsATEX(1)

Certificate Certification Obtained Entity Rating Temperature Code Enclosure Rating

ATEX

Intrinsically SafeII 1 G & D

GasEEx ia IIC T4,T5DustT 90_C (Tamb = 80_C)

Ui = 40 VDCIi = 200 mAPi = 1.0 WCi = 8 nF

Li = 20 mH

T4 (Tambv 80_C)T5 (Tambv 40_C)

IP66

FlameproofII 2 G & D

GasEEx d IIB T5/T6DustT 90_C (Tamb = 80_C)


IP66

Type nII 3 G & D

GasEEx nL IIC T5,T6DustT 95_C (Tamb = 85_C)


IP66

1. Not approved for use with natural gas as the supply medium.


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Table 5. Hazardous Area ClassificationsIECEx(1)


IECEx

Intrinscally SafeGas

Ex ia IIC T4/T5DustDIP A20 TA 90_C/TA 50_C IP66

Ui = 40 VDCIi = 200 mA

Pi = 1.0 WCi = 8 nFLi = 20 mH

T4 (Tambv 80_C)T5 (Tambv 40_C IP66

FlameproofGasEx d IIB T5/T6DustDIP A21 TA 90_C IP66


IP66

Type nGasEx nL IIC T5/T6DustDIP A22 TA 90_C/TA 85_C IP66


IP66

DustDIP A20 TA 90_C IP66

IP66


Table 6. Hazardous Area ClassificationsGOST(1)


GOST

Intrinsically SafeGasEx ia IIC T4/T5

Ui = 30 VIi = 200 mAPi = 1.2 WCi = 10 nFLi = 20 mH


IP66

FlameproofGasEx d IIB T5/T6


IP66

Type nGasEx nL IIC T5/T6


IP66



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Emerson Process ManagementMarshalltown, Iowa 50158 USASorocaba, 18087 BrazilChatham, Kent ME4 4QZ UKDubai, United Arab EmiratesSingapore 1233111 Singapore

EFisher Controls International LLC 1995, 2010; All Rights Reserved

www.Fisher.com

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, theyare not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use orapplicability. All sales are governed by our terms and conditions, which are available upon request. We reserve the right to modify or improve thedesigns or specifications of such products at any time without notice. Neither Emerson, Emerson Process Management, nor any of their affiliatedentities assumes responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use, and maintenance ofany product remains solely with the purchaser and end user.

Fisher is a mark owned by one of the companies in the Emerson Process Management business division of Emerson Electric Co. EmersonProcess Management, Emerson, and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the propertyof their respective owners.

Electro−Pneumatic Transducer

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