Emerson Fisher 846 Data Sheet
Contents
1. Ex tc IIIC T88 C Ts99 Dc IP66 Ex tc IIIC T77 C T599 Dc IP66 Certification Body Certification Obtained Entity Rating Temperature Code Ex ia Intrinsically Safe MAE ARS Class Division 1 Groups A B C D T4 Ci 0 016 uF T4 Tamb lt 60 C er drawing GE59146 bree P Li 20 uH CSA XP Explosion proof Class I Division 1 Groups C D DIP Dust Ignition proof A Class II III Division Groups E F G T4 T4 Tann 6050 NI Non incendive Class I Division 2 Groups A B C D T4 Table 3 Hazardous Area Classification for United Stated FM Certification Body Certification Obtained Entity Rating Temperature Code Vmax 30 VDC IS Intrinsically Safe Imax 100 mA Class I Il III Division 1 Groups A B C D E F G Pmax 1 0 W T4 Tamb lt 60 C per drawing GE59147 Ci 0 016 uF Li 20 uH FM XP Explosion proof Class I Division 1 Groups B C D DIP Dust Ignition proof tf r Class Il III Division I Groups EFG 14 Tamb 602C NI Non incendive Class Division 2 Groups A B C D Table 4 Hazardous Area Classifications ATEX Certificate Certification Obtained Entity Rating Temperature Code Intrinsically Safe MT GD Ui 30 VDC Gas li 100 mA s Ex ia IIC T4 T5 Ga Pi 1 0W 1 a Dust Ci 8nF i Ex ia IIIC IP66 Da T90 C Tamb lt 80 C Li 20 uH Ex ia IIIC IP66 Da T50 C Tamb lt 40 C Flameproof I2G T5 Tamb lt 80 C ATEX Gas ca T6 Tamb lt 65 C Ex d IIB T5 T6 Gb Typen amp 113 GD Gas2. GS Sica E See mm INCH Product Bulletin 846 Transducer 62 1 846 D102127X012 March 2015 Figure 6 Dimensions with Optional Fisher 67CFR Filter Regulator Yoke Mounted COVER REMOVAL CLEARANCE 67 2 62 191 6 0 25 7 51 FOR PROPER MOISTURE CT DRAINAGE THIS END MUST BE UP CENTERLINE OF ACTUATOR MODULE 137 COVER 5 38 REMOVAL CLEARANCE YOKE MOUNTED mm INCH Note 1 gt 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 14B7361 D Product Bulletin 62 1 846 846 Transducer March 2015 D102127X012 Figure 7 Dimensions with Optional Fisher 67CFR Filter Regulator Surface Wall Mounted 67 COVER REMOVAL 2 62 CLEARANCE 222 8 76 FOR PROPER MOISTURE DRAINAGE THIS END MUST BE UP lt 1 0 50 MODULE COVER 137 REMOVAL 5 38 CLEARANCE 10 0 38 MOUNTING HOLE 4 PLACES SURFACE WALL MOUNTED mm INCH Note 1 gt 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 compartmen
3. IECEx Intrinsically Safe Flameproof Other Classifications Certifications CUTR Customs Union Technical Regulations Russian Kazakhstan and Belarus INMETRO National Institute of Metrology Quality and Technology Brazil KGS Korea Gas Safety Corporation South Korea NEPSI National Supervision and Inspection Centre for Explosion Protection and Safety of Instrumentation China Contact your Emerson Process Management OF m sales office for classification certification specific information E Construction Materials Housing W Low copper aluminum with polyurethane paint or Mi CF8M O Rings Nitrile except silicone for sensor O rings Mounting E Actuator W pipestand or W surface Weight Aluminum 2 9 kg 6 5 Ib excluding options Electrical Housing Stainless Steel 6 7 kg 14 8 Ib excluding options Tropicalization Fungus test per MIL STD 810 CSA C US Type 4X Options FM Type T E Fisher 67CFR filter regulator W supply and output ATEX P66 4 gauges W remote pressure reading or W stainless IECEx IP66 4 steel mounting bracket NOTE Specialized instrument terms are defined in ANSI ISA Standard 51 1 Process Instrument Terminolo 1 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 MEN a4to 20 mA dc input signal a 3 to 15 psig output an
4. 1 Meets emission levels for Class A equipment industrial locations and Class B equipment domestic locations Meets immunity requirements for industrial locations Table A 1 Immunity performance is shown in table 1 Leak Sensitivity Less than 1 0 of span for up to 4 8 m3 hr 180 scfh downstream leakage Overpressure Effect Less than 0 25 of span for misapplication of up to 7 0 bar 100 psi supply pressure for less than 5 minutes to the input port Reverse Polarity Protection No damage occurs from reversal of normal supply current 4 20 mA or from misapplication of up to 100 mA Connections Supply and Output Pressure 1 4 18 NPT internal connection Electrical 1 2 14 NPT internal conduit connection continued 846 Transducer D102127X012 Specifications Continued Product Bulletin 62 1 846 March 2015 Adjustments Zero and Span Screwdriver adjustments located in terminal compartment Remote Pressure Reading optional ON or OFF jumper selectable Frequency Range 0 10 000 Hz Amplitude 0 4 1 0 Vp p Required Operating Voltage Min 6 0 V at 4 mA Max 7 2 V at 20 mA with Remote Pressure Reading ON Min 6 4 V at 4 mA Max 8 2 V at 20 mA Electrical Classification 3 Hazardous Area see Bulletin 9 2 001 D103222X012 CSA C US Intrinsically Safe Explosion proof Non Incendive FM Intrinsically Safe Explosion proof Non Incendive ATEX Intrinsically Safe Flameproof Type n
5. T5 Tamb lt 85 C ar aoe GE T6 Tamb lt 74 C Product Bulletin 846 Transducer 62 1 846 D102127X012 March 2015 Table 5 Hazardous Area Classifications IECEx Certificate Certification Obtained Entity Rating Temperature Code Ui 40 VDC Intrinsically Safe li 200 mA T4 Tamb lt 80 C ee EOW T5 Tamb lt 40 C Ex ia IIC T4 T5 Ga Ci 8nF T IECEx Li 20 uH eee T5 Tamb lt 80 C Ex d IIB T5 T6 Gb TO TaD s 637C 11 Product Bulletin 62 1 846 846 Transducer March 2015 D102127X012 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 is a mark owned by one of the companies in the Emerson Process Management business unit of Emerson Electric Co Emerson Process Management Emerson and the Emerson logo are trademarks and service marks of Emerson Electric Co All other marks are the property of their respective owners The contents of this publication are presented for informational purposes only and while every effort has been made to ensure their accuracy they are not to be construed as warranties or guarantees express or implied regarding the products or services described herein or their use or applicability All sales are governed by our terms and cond
6. 846 Transducer D102127X012 Product Bulletin 62 1 846 March 2015 Fisher 846 Electro Pneumatic Transducer The Fisher 846 electro pneumatic transducer is a rugged field mountable transducer that accepts an electrical input signal and converts it to a pneumatic output signal Typically the 4 to 20 mA is converted to 0 2 to 1 0 bar 3 to 15 psi In the most common application the transducer converts an electrical output signal from a controller to a pneumatic signal necessary to operate a control valve actuator or pneumatic positioner The transducer includes a deflector nozzle design figure 1 that consists of two nozzles positioned so that the constant air flow exiting the supply nozzle is directed 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 The input current signal positions a deflector bar within the X0234 FISHER 846 ELECTRO PNEUMATIC TRANSDUCER nozzle s flow stream As the input signal changes the deflector bar moves to alter the flow stream to the receiver nozzle establishing a pilot pressure at the receiver nozzle The pilot pressure in turn controls the booster stage and output of the transducer An electronic feedback control network constantly compares the value of the pneumatic output signal with the input current signal A solid state pressure sensor is part of the electronics package monitoring the pneumati
7. c output figure 3 A comparator circuit in the control network detects input output deviations and adjusts the output by moving the deflector in the pilot stage to a corrected position Because of this feedback network the transducer can correct for error producing effects such as variations in supply pressure and downstream leakage W6307 1 846 MOUNTED ON FISHER 667 ACTUATOR S EMERSON www Fisher com Process Management Product Bulletin 62 1 846 March 2015 Specifications Input Signal 4 20 mA DC field adjustable split ranging Equivalent Circuit See figure 4 Output Signal Standard Performance W 0 2 to 1 0 bar 3 to 15 psi Rangeability between 0 1 to 1 2 bar 1 and 18 psi Multirange Performance W 0 to 1 2 bar 0 to 18 psi E 0 4 to 2 0 bar 6 to 30 psi and W 0 to 2 3 bar 0 to 33 psi nominal ranges Actual rangeability available between 0 03 to 2 3 bar 0 5 and 33 psi Action Direct increasing input signal increases transducer output Minimum span 6 psi or E Reverse increasing input signal decreases 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 maximum calibrated output pressure Maximum 2 4 bar 35 psi Supply Pressure Medium Clean dry air Per ISA Standard 7 0 01 A maximum 40 micrometer particle
8. d 20 psig supply pressure 3 Refer to tables 2 3 4 and 5 for additional informatio 4 ATEX and IECEx Flameproof IP66 per CSA Letter of Aftestation Table 1 EMC Immunity Performance Criteria Port Phenomenon Basic Standard Test Level Performance Criteria 1 Electrostatic discharge 4 kV contact ESD IEC 61000 4 2 8 kV air A Enclosure 80 to 1000 MHz 10V m with 1 kHz AM at 80 Radiated EM field IEC 61000 4 3 1400 to 2000 MHz 3V m with 1kHz AM at 80 A 2000 to 2700 MHz 1V m with 1kHz AM at 80 Burst fast transients IEC 61000 4 4 TkV A Geena ka Surge IEC 61000 4 5 1 kV line to ground only each B lO signal contro P En 150 kHz to 8 MHz at 3 Vrms B enue ia 8 MHz to 80 MHz at 3 Vrms A Specification limit 1 of span 1 A No degradation during testing B Temporary degradation during testing but is self recovering Product Bulletin 62 1 846 March 2015 Features m Vibration Resistant The low mass pilot stage mechanically damped deflector bar and rugged construction provide stable performance in vibration m Large Diameter Nozzles Large diameter nozzles free flow pilot stage design and large internal pneumatic supply passages provide excellent tolerance to reducing the effects of contaminant buildup and erosion m Increased Accuracy Reduced Sensitivity to Supply Pressure Variations and Downstream Leakage The electronic feedback control network monitors the
9. itions which are available upon request We reserve the right to modify or improve the designs or specifications of such products at any time without notice Emerson Process Management Marshalltown lowa 50158 USA Sorocaba 18087 Brazil Chatham Kent ME4 4QZ UK Dubai United Arab Emirates ey Singapore 128461 Singapore www Fisher com EMERSON Process Management 1995 2015 Fisher Controls International LLC All rights reserved Frocess Nanhagement
10. pneumatic output signal detects any input output deviations and corrects them This provides very high accuracy and allows the transducer to sense changes in the final element condition and rapidly optimize its air delivery m Easy Maintenance Major mechanical and electrical components are incorporated into a single field replaceable master module figure 2 The transducer does not have to be removed from its mounting to facilitate troubleshooting or service A separate field wiring compartment eases installation and maintenance m Quick Diagnostic Checks and Remote Performance Monitoring 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 With optional Remote Pressure Reading a frequency directly proportional to the output pressure is superimposed on the input signal wires Using a frequency counter an operator can monitor the 846 output pressure 846 Transducer D102127X012 Figure 1 Detail of Deflector Nozzle Pilot Stage r W6287 Installation The transducer may be actuator wall panel or pipestand mounted Dimensions are shown in figures 6 7 and 8 Ordering Information To determine what ordering information is required refer to the specification table Carefully review the description of each specification Specify
11. size in the air system is acceptable Further filtration down to 5 micrometer particle size is recommended Lubricant content is not to exceed 1 ppm weight w w or volume v v basis Condensation in the air supply should be minimized Per ISO 8573 1 Maximum particle density size Class 7 Oil content Class 3 Pressure Dew Point Class 3 or at least 10 C less than the lowest ambient temperature expected Maximum Steady State Air Consumption 0 3 m3 hr 12 scfh at 1 4 bar 20 psi supply pressure Output Air Capacity Standard Performance 6 4 m hr 240 scfh at 1 4 bar 20 psi supply pressure 846 Transducer D102127X012 Multirange Performance 9 7 m hr 360 scfh 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 0 100 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 the following conditions 5 15 Hz at 4mm constant displacement 15 150 Hz at 2 g 150 2000 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 per SAMA Standard PMC 31 1 Sec 5 4 Supply Pressure Effect Negligible Electromagnetic Interference EMI Tested per IEC 61326 1 Edition 1
12. t cover on the bottom moisture may accumulate in the erminal compartment or pilot stage preventing proper transducer operation The vertical mount is most effective for moisture drainage in wet applications 14B7332 D Product Bulletin 846 Transducer 62 1 846 D102127X012 March 2015 Figure 8 Dimensions with Optional Fisher 67CFR Filter Regulator Pipe Stand Mounted 210 8 27 1 2 14 NPT 148 CONDUIT CONN 67 COVER REMOVAL 2 62 CLEARANCE FOR PROPER MOISTURE DRAINAGE THIS END MUSTBEUP lt 7 lt 2 67CFR 1 4 18 NPT SUPPLY CONN 1 2 14 NPT 1 2 14 NPT OUTLET CONN CONDUIT CONN PLUGGED WHEN GAUGE NOT FINISHED 10 31 MODULE 137 COVER 5 38 REMOVAL CLEARANCE mm PIPE STAND MOUNTED INCH otes I gt 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 If mounted on horizontal pipe the I P must be on top of the pipe for proper moisture drainage 14B7363 D Product Bulletin 62 1 846 March 2015 Table 2 Hazardous Area Classifications for Canada cCSAus 846 Transducer D102127X012
13. the desired choice 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 and diaphragm pressure range For all 657 and 667 actuators except size 80 specify whether actuator yoke or actuator casing mounting is desired yoke mounting only is available on size 80 actuators 846 Transducer D102127X012 Figure 2 Master Module Construction A6326 MODULE COVER Figure 3 Functional Block Diagram ATO 20 mA INPUT ELECTRONIC CIRCUIT MAGNETIC ACTUATOR BOOSTER STAGE 3 TO 15 PSI OUTPUT TYPICAL A6324 TERMINAL COVER TRANSDUCER HOUSING MASTER MODULE STROKE PORT SOLID STATE PILOT STAGE PRESSURE SENSOR Product Bulletin 62 1 846 March 2015 Figure 4 Equivalent Circuit 846 TRANSDUCER 6 VDC Note The 846 is not a constant resistor in series with an inductor It is better modeled in the loop as a 50 ohm resistor in series with a 6 volt DC voltage drop with negligible inductance A6325 Product Bulletin 62 1 846 March 2015 Figure 5 Dimensions 67 COVER REMOVAL 2 62 CLEARANCE 2 69 59 2 31 3 08 137 MODULE COVER 5 38 REMOVALCLEARANCE 5 16 18 3 PLACES 129 1 4 18 NPT OUTLET CONN PLUGGED WHEN GAUGE NOT FURNISHED 14B7364 C 138 846 Transducer D102127X012 1 4 18 NPT SUPPLY CONN
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