Type i2p-100 Electro-Pneumatic Transducer

Transcription

1 Product Bulletin i2p-100 Transducer Type i2p-100 Electro-Pneumatic Transducer The Type i2p-100 electro-pneumatic transducer, shown in figure 1, uses a patented converter module that converts a milliampere input to a proportional pressure output. Both the current input and pressure output range are user-configurable in the field. The converter module uses small parts of minimum mass, which are balanced symmetrically around a pivot point at the center of the mass. This balanced arrangement results in a high performance instrument that reduces sensitivity to vibration. An integral pneumatic relay provides the high capacity necessary to drive pneumatic control valve/actuator assemblies without additional boosters or positioners. The transducer also provides stable, accurate operation when its output is transmitted to small volume chambers, such as a pneumatic positioner or other pneumatic instrument. Reduced sensitivity to vibration, combined with high capacity and first order lag characteristics, make the i2p-100 transducer suitable for direct mounting on control valve/actuator combinations. Features Low Pneumatic Supply Consumption The transducer has low pneumatic supply consumption which lowers operating costs. Approved for use with Natural Gas The i2p-100 is approved for use with natural gas as the pneumatic supply. High Output Capability and Rangeability The integral output relay volume of the transducer is adequate to drive valve/actuator combinations without requiring a positioner or volume booster. Selectable user field-configurable dip switch setting for output range of 0.2 to 2.0 bar (3 to 30 psi). Split Range Selectable user field-configurable two-way split range, using either half of the standard input signal. INTEGRAL PNEUMATIC RELAY W8710 REPLACEABLE FILTER WITH REMOVABLE ORIFICE VENT Figure 1. Type i2p-100 Electro-Pneumatic Transducer Corrosion Resistant Separate housing compartments isolate the electronics from the pneumatic process. The electronics module is encased in a rugged plastic shell which helps to prevent damage to the electronics. The printed wiring board and dip switches are conformal coated to help prevent corrosion. Converter module coils have corrosion resistant coating and all flexures are gold plated to provide protection from hostile environments. Tolerant of Dirty Supply Medium Free-flow pilot stage design and large internal air passages provide excellent tolerance to dirty pneumatic supply, by reducing the effects of contaminant buildup and erosion. The removable primary orifice and replaceable 5 micron filter are easy to remove for service and maintenance (see figure 1). Easy Maintenance Modular electronics and converter modules contained in separate housing compartments, isolating the electronics from the process, allow for easy replacement in the field for reduced maintenance time and costs. Vibration Resistance The transducer, used in a standard valve/actuator mounted application, exhibits an output shift of less than 1 percent of span when tested to ISA S D103197X012

2 i2p-100 Transducer Product Bulletin W8693 Figure 2. Type i2p-100 Electro-Pneumatic Transducer Mounted on a Rotary Actuator W8723 OUTPUT (% OF TYPE i2p-100 OUTPUT SPAN) LOADING EXHAUSTING A6815 / IL TIME (%) Figure 4. Type i2p-100 Electro-Pneumatic Transducer Mounted on a Sliding Stem Actuator Installation Refer to figure 5 for location of standard mounting holes in the housing. See figures 2 and 4 for typical mounting configurations. Standard mounting hardware is provided for mounting on the actuator, a pipestand, or surface mount. Field wiring connections are made to the terminal block accessible under the housing cap, via the 1/2-inch NPT conduit connection. Dimensions are shown in figures 5, 6, 7 and 8. Figure 3. Output-Time Relationships for Type i2p-100 Transducer Valve Stroking Time Figure 3 shows relative times for loading and exhausting an actuator. Stroking time depends upon the size of the actuator, travel, relay characteristics and the magnitude and rate of change of the input signal. If stroking time is critical, contact your Fisher sales office. Ordering Information To determine what ordering information is required, refer to the Specifications table. Carefully review the description of each specification. Specify the desired choice whenever there is a selection available. Also, specify options that are applicable to the application. Note Neither Emerson, Emerson Process Management, nor Fisher assume responsibility for the selection, use, or maintenance of any product. Responsibility for the selection, use, or maintenance of any Fisher product remains solely with the purchaser and end-user. 2

3 Product Bulletin i2p-100 Transducer 58.7 (2.31) 1/2 14 NPT CONDUIT CONNECTION 22.3 (0.88) 98.7 (3.89) 81.6 (3.21) 34.7 (1.37) (4.09) (4.09) 36.3 (1.43) 74.2 (2.92) GE06439 (sheet 1 of 4) 67.8 (2.67) 33.3 (1.31) 55.7 (2.19) 1/4 18 NPT VENT OR PIPE-A-WAY CONNECTION 1/4 18 NPT OUTPUT CONNECTION 1/4 18 NPT SUPPLY CONNECTION 67 (2.62) CAP REMOVAL Figure 5. Dimensions 75.2 (2.96) 22.9 (0.90) 33.3 (1.31) 33.3 (1.31) 75.7 (2.98) 1/4 18 NPT OUTPUT CONNECTION 67 (2.62) CAP REMOVAL mm (INCH) 67 (2.62) COVER REMOVAL (BOTH COVERS) (9.37) 69.9 (2.75) (4.97) 8.6 (0.34) 74.2 (2.92) 6.4 (0.25) 57.2 (2.25) 50.8 (2.00) (6.72) (3.98) GE06439 (sheet 2 of 4) 240 (9.45) Figure 6. Dimensions with Optional 67 Filter-Regulator (Yoke/Bracket Mounted) (8.06) mm (INCH) 3

4 i2p-100 Transducer Product Bulletin (5.75) 67 (2.62) COVER REMOVAL (BOTH COVERS) 91.1 (3.59) (5.75) GE06439 (sheet 3 of 4) (8.25) Figure 7. Dimensions with Optional 67 Filter-Regulator (Surface/Wall Mounted) mm (INCH) 67 (2.62) COVER REMOVAL (BOTH COVERS) (9.37) 60.5 (2.38) 50.8 (2.00) (6.72) 74.2 (2.92) GE06439 (sheet 4 of 4) 240 (9.55) (9.58) Figure 8. Dimensions with Optional 67 Filter-Regulator (Pipe Stand Mounted) mm (INCH) 4

5 Product Bulletin i2p-100 Transducer Specifications Input Signal (1) Available as standard with 4-20 ma. User configurable by dip switch for split ranging, see table below. Output Signal (1) Available as standard 0.2 to 1.0 bar (3 to 15 psig) or 0.4 to 2.0 bar (6 to 30 psig). User configurable by dip switch selection and zero and span potentiometer adjustment, see table below. INPUT SIGNAL 4 to 20 ma dc BAR OUTPUT PRESSURE PSIG 0.2 to to to to 30 4 to 12 ma dc 0.2 to to to 20 ma dc 0.2 to to 15 Equivalent Circuit The Type i2p-100 equivalent circuit is a series circuit consisting of a constant voltage drop (battery) of approximately 4 V dc and a total resistance of 40 Ohms. Input is shunted by two 6.8 V zener diodes (see figure 9). Supply Pressure (1,6) Recommended: 0.3 bar (5 psi) higher than upper range limit of output signal Maximum: 3.4 bar (50 psig) Medium: Air or Natural Gas (4) Average Steady State Flow Rate (1,2) OUTPUT RANGE bar (3-15 psig) bar (6-30 psig) SUPPLY PRESSURE 1.5 bar (20 psig) 2.4 bar (35 psig) OUTPUT FLOW RATE OUTPUT FLOW RATE Bar Psig Normal m 3 /h Scfh Bar Psig Normal m 3 /h Scfh Maximum Output Air Capacity (2) 8.0 normal m 3 /hr (5.0 scfm) at 1.4 bar (20 psig) supply pressure Performance (3) Reference Accuracy: ±1.0% of full scale output span; includes combined effects of hysteresis, linearity, and deadband Independent Linearity (1) : ±0.75% of full scale output span Hysteresis (1) : 0.4% of full scale output span Frequency Response (1) : Gain is attenuated 3 db at 6 Hz with transducer output signal piped to a typical instrument input Temperature Effect: 0.14% per degrees Celsius ( per degrees Fahrenheit) of span Supply Pressure Effect: 0.2% of full scale output span per bar supply pressure change (0.2% of full scale output span per psi supply pressure change) Vibration Effect: Less than 1% of full scale output span when tested to ISA S75.13 Electromagnetic Interference (EMI) (1) : Tested per IEC (Edition 1.1).Conforms to the European EMC Directive. Meets emission levels for Class A equipment (industrial locations) and Class B equipment (domestic locations). Meets immunity requirements for industrial locations (Table A.1 in the IEC specification document). Immunity performance shown in table 1. Operating Ambient Temperature Limits (6) -40 to 85 C (-40 to +180 F) Electrical Classification Hazardous Area (7) : Explosion proof, Dust-Ignition proof, Intrinsically Safe Explosion proof, Non-incendive, APPROVED Dust-Ignition proof, Intrinsically Safe ATEX Intrinsically Safe, Type n and Flameproof IECEx Intrinsically Safe, Type n and Flameproof Refer to the Hazardous Area Classification bulletins, and tables 2 and 3 for specific approval information. Approved for use with natural gas (4) -continued- 5

6 i2p-100 Transducer Product Bulletin Specifications (continued) Electrical Housing: NEMA 4X, CSA enclosure 4X & IP66 when remote vented, otherwise NEMA 3R, CSA enclosure 3R & IP64 Construction Materials Housing: Low-Copper aluminum with polyurethane paint O-rings: Nitrile Diaphragms: Nitrile Adjustments (5) Zero and Span: Trim potentiometers (20 turn) for zero and span adjustments are located under the housing cap. Switch: Allows input signal split range and user-configurable 0.2 to 2 bar (3 to 30 psig) output. Connections Supply and Output Pressure: 1/4-inch NPT female connection Vent: 1/4-inch NPT female Electrical: Standard 1/2-inch NPT Wire Size: 18 to 22 AWG Mounting Position Actuator pipestand or surface Approximate Weight 2.5 kg (5.5 lbs) Options Output pressure gauge M20 or PG13 conduit adapter 1. Defined in ISA Standard S Normal m 3 /hour--normal cubic meters per hour (0 C and bar, absolute). Scfm--Standard cubic feet per hour (60 F and 14.7 psig). 3. Performance values are obtained using a transducer with a 4 to 20 ma dc input signal and a 0.2 to 1.0 bar (3 to 15 psig) output signal at an ambient temperature of 24 C (75 F). 4. This product is approved for use with Natural Gas. Natural gas to contain no more than 20 ppm of H 2 S 5. For other ranges, zero and span adjustments needed. 6. The pressure and temperature limits in this bulletin and any applicable standard or code limitation should not be exceeded. 7. Some approvals are pending. Contact your Fisher Sales office for information on pending approvals. Table 1. Immunity Performance Port Phenomenon Basic Standard Performance Criteria (1) Electrostatic discharge (ESD) IEC A Enclosure Radiated EM field IEC A Rated power frequency magnetic field IEC A Burst (fast transients) IEC A I/O signal/control Surge IEC A Conducted RF IEC A Specification limit = ±1% of span 1. A = No degradation during testing. B = Temporary degradation during testing, but is self-recovering ma 6.8V 6.8V 4V 40 Ohm Figure 9. Equivalent Circuit 6

7 Product Bulletin i2p-100 Transducer CERTIFICATION BODY CSA FM * When remotely vented. Table 2. Hazardous Area Classifications for North America CERTIFICATION BODY ENTITY RATING TEMPERATURE CODE ENCLOSURE RATING (Intrinsic Safety) Ex ia IIC T3/T4/T5 Class/Division Class I, II, III Division 1 GP A, B, C, D, E, F, G per drawing GE07471 (Explosion Proof) Ex d IIC T5/T6 Class/Division Class I, Division 1 GP, A, B, C, D (Type n) Ex nc IIC T5/T6 Class I, Division 2, GP A, B, C, D Class II, Division 2, GP E, F, G Class III (Intrinsic Safety) Class I 0 AEx ia IIC T3/T4/T5 Class/Division Class I, II, III Division 1 GP A, B, C, D, E, F, G per drawing GE07470 (Explosion Proof) Class I 1 AEx d IIC T5/T6 Class/Division Class I, Division 1, GP B, C, D (Type n) Class I 2 AEx nc IIC T5/T6 Class I, Division 2, GP A, B, C, D Class II, Division 2, GP F, G Class III V max = 30 Vdc I max = 150 ma P i = 1.0 W C i = 5 nf L i = 0 mh V max = 30 Vdc I max = 150 ma P i = 1.0 W C i = 0 nf L i = 0 mh T3 (T amb < 85 C) T4 (T amb < 81 C) T5 (T amb < 46 C) T3 (T amb < 85 C) T4 (T amb < 81 C) T5 (T amb < 46 C) CERTIFICATE (AGENCY) ATEX (KEMA) IECEx (CSA) * When remotely vented. (Intrinsic Safety) EEx ia IIC T3/T4/T5 (Flameproof) EEx d IIC T5/T6 (Type n) EEx nc IIC T5/T6 (Intrinsic Safety) Ex ia IIC T3/T4/T5 (Flameproof) Ex d IIC T5/T6 (Type n) Ex nc IIC T5/T6 Table 3. Hazardous Area Classifications for Europe and Asia-Pacific CERTIFICATION OBTAINED ENTITY RATING TEMPERATURE CODE ENCLOSURE RATING U i = 30 Vdc I i = 150 ma P i = 1.0 W C i = 0 nf L i = 0 mh U i = 30 Vdc I i = 150 ma P i = 1.0 W C i = 0 nf L i = 0 mh T3 (T amb < 85 C) T4 (T amb < 81 C) T5 (T amb < 46 C) T3 (T amb < 85 C) T4 (T amb < 81 C) T5 (T amb < 46 C) 7

8 i2p-100 Transducer Product Bulletin Fisher is a mark owned by Fisher Controls International LLC, a member of the Emerson Process Management business division of Emerson Electric Co. Emerson and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their respective owners. This product may be covered under one or more of the following patents; 4,836,011; 4,595,029 or under pending patent applications. 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. We reserve the right to modify or improve the designs or specifications of such products at any time without notice. Neither Emerson, Emerson Process Management, nor Fisher assume responsibility for the selection, use or maintenance of any Fisher product. Responsibility for proper selection, use and maintenance of any Fisher product remains solely with the purchaser and end-user. Emerson Process Management Fisher Marshalltown, Iowa USA Cernay France Sao Paulo Brazil Singapore Fisher 8 Controls International LLC 2004, 2005; All Rights Reserved Printed in USA