UL Electrical Equipment for Measurement, Control, and Laboratory Use; Part 1: General Requirements, Second Edition

Transcription

1 File E Project 07CA39477 March 5, 2008 REPORT on PROCESS CONTROL EQUIPMENT FOR USE IN HAZARDOUS LOCATIONS Litre Meter Ltd. Buckinghamshire, England Copyright 2008 Underwriters Laboratories Inc. Underwriters Laboratories Inc. authorizes the above named company to reproduce this Report provided it is in its entirety.

2 File E Vol. 1 Sec. 1 Page 1 Issued: DESCRIPTION PRODUCT COVERED: USL Associated Apparatus Flow Meter for use in Class I, Division 1, Groups B, C, and D Hazardous Locations. Model FPODEXD-XJLGCHN4X provides intrinsically safe circuits for use in Class I, Division 1, Groups B, C, and D Hazardous Locations when installed in accordance with manufacturer s control drawing no. IS GENERAL: Model FPODEXD-XJLGCHN4X is a permanently mounted flow meter consisting of an explosion-proof enclosure containing a PCB with LCD mounted on an internal chassis, an IS barrier, and a communication interface connected to sensor model ULCOVERXA, followed by two single digit numbers. ENGINEERING CONSIDERATIONS (NOT FOR FIELD REPRESENTATIVE S USE): USL indicates investigation to the following United States Standards: UL Electrical Equipment for Measurement, Control, and Laboratory Use; Part 1: General Requirements, Second Edition UL 1203 Explosion-proof and Dust Ignition-proof Equipment for Use in Class I, II and III Hazardous (Classified) Locations, Fourth Edition UL 913, Intrinsically Safe Apparatus and Associated Apparatus for Use in Class I, II, and III Hazardous (Classified) Locations, Fifth Edition RATINGS: Power Input: 24 V dc, 100 ma max, +/-10%. Signal Input (Reed Switch) 24 V dc max, 10 ma max. Control Output: 24 V dc max, 100 ma. Signal (Communications Output): 32 V dc max, 4-20 ma HART or Fieldbus Output: Terminals 1 and 2 (from IS barrier): Voc = 10.5 V Isc = 14 ma Ca = 2.4 uf La = 165 mh Temperature Rating: -20ºC < Ta < +60ºC Temperature Code: T5MARKINGS: The device is provided with the markings as shown in ILL. 1 on a riveted, aluminum or stainless steel label.

3 File E Vol. 1 Sec. 1 Page 2 Issued: CONTROL DRAWING: A copy of the control drawing no. IS 6095, shown in ILL. 2, is provided with each device. INSTALLATION INSTRUCTIONS: Installation Instructions are provided with each device and shall include the following: 1. The supply voltage shall not exceed 36 V dc, and The supply must be isolated from mains voltage by double/reinforced insulation 2. Intended use of the equipment, technical specifications including the supply voltage and power or current rating and a description of all input and output connections, instructions for use, name and address of manufacturer or supplier from whom technical assistance may be obtained 3. A statement of the range of environmental conditions for which the equipment is designed 4. Assembly, location and mounting requirements, instruction for protective earthing, field wiring size, type, tightening torque and recommended strip length 5. That a switch or circuit-breaker shall be included in the building installation, and a recommendation that the switch or circuit breaker used as the disconnect be located near the equipment 6. Instructions for interconnection to accessories and other equipment 7. If the display (explosion-proof enclosure) needs to be mounted away from the meter care should be taken when routing the armored cable. The cable should be fixed (clamped) within 20 in. (500 mm) of the glands (both meter and enclosure) to support and maintain the integrity of the seal. After installation these seals should be visually checked for damage. The cable length will not exceed 33 feet (10 m). CONSTRUCTION DETAILS: General The device is constructed in accordance with the following figures, illustrations and descriptive pages. Dimensions are approximate unless specifically indicated otherwise. Spacings Where affecting intrinsic safety, spacings have been evaluated and found to be in accordance with Table 8.1 in UL 913, Fifth Edition.

4 File E Vol. 1 Sec. 1 Page 3 Issued: Clearance And Creepage Distances - Requirements for clearance and creepage distances were based on Pollution Degree 2. Clearances were evaluated and determined to comply with the requirements outlined in Table 5 of UL Creepage distances were evaluated and determined to comply with the requirements outlined in Table 7 or UL Internal Wiring Unless otherwise indicated, all internal wiring is R/C (AVLV2) rated 300 V, 100ºC minimum, and 24 AWG minimum with minimum insulation thickness of 0.25 mm. Printed Wiring board - Any R/C (ZPMV2) with flame rating of V-0, V-1, or V-2 and an operating temperature of 105 C, meets UL 746 direct support requirements. DOCUMENTATION: FIG. No. The device is constructed in accordance with the following drawings: ILL. No. Description Drawing No. Revision/Date 1 FPODEXD-XJLGCHN4X, External Internal PCBs Rear View, PCBs IS Barrier, Front View Metal Partition Label LM-UL-TAG 1 2 Control Drawing IS OVERALL BOM FPODEXD-XJLGCHN4X BOM FLIN Board Schematic PB IS Screen Illustration - 1

5 File E Vol. 1 Sec. 1 Page 4 Issued: Revised: MODEL FPODEXD-XJLGCHN4X (OVERALL ASSEMBLY) - FIG. 1 General Shown is the assembly of Model FPODEXD-XJLGCHN4X. Please note that the labels shown in the picture are not the final versions; see ILL. 1 for the final version. The complete assembly consists of an explosion-proof enclosure containing a 2-line LCD, temperature transmitter, F-Lin PCB, internal chassis, and IS barrier; along with a flow meter sensor connected via a cable, with a maximum length of 10 m. 1. Enclosure Listed (FTRV) enclosure manufactured by Adalet-PLM Fetzer Co., Cat. No. XJLGCHN4X. Overall dimensions of 6 5/32in.H by 7in.W by 7 in.d. The enclosure is provided with a 4 in. diameter window and two 3/4 in. NPT conduit entries. The enclosure is suitable for an ambient temperature of -20ºC to +60ºC. All unused conduit entries shall be filled with a UL Listed (EBNV) Plugs suitable for at least the same class and groups as indicated under the product covered and with at least five (5) full threads engaged. Threaded Joint Metal-to-metal threaded joint between the enclosure, Item 1, and Cable Sealing Fitting, Item 8, engages not less than five full NPT threads upon assembly Line LCD manufactured by Ampire, Cat. No. AC-162BYILY. Dimensions 3 1/8 in. by 1 3/8 in.. 3. Foundation Fieldbus Puck manufactured by Wika, Cat. No. TE XX where XX = NI or IS Dimensions 1 3/4 in. diameter by 3/4 in. deep. 4. F-LIN PCB manufactured by Litre Meter, Cat. No Dimensions 3 1/8 in. by 2 1/2 in. 5. Internal Chassis 6. IS Barrier UL Listed (QUZW), manufactured by Measurement Technology Ltd., Part No See FIG Partition Grounded, metal partition, separating IS from non-is wiring. See ILL. 5 and FIG. 5 for views. 8. Cable Sealing Fitting UL Listed (CYMX), manufactured by Hawke, Cat. No. 711 size A. Marked for an ambient range of 50 C to +60 C. For use only with MC cable employing continuous corrugated aluminum armor with HL surface marking and either ST574 or Hawkseal (Bicaseal) Activator sealing compounds. Cable OD range over jacket is Fittings must be installed per the manufacturer s instructions. 9. Cable UL Listed (PJPP), manufactured by Okonite, Type MC-HL cable with continuous corrugated aluminum armor. Cable has an outer diameter of approximately 0.70in. Cable contains three (one cut back) Recognized (AVLV2) 14 gauge, Type XHHW-2 copper insulated conductors. Rated 600 V. 10. Flow Meter Sensor Housing may vary, only contains reed switch. Marked with the following nomenclature: ULCOVERXAYY, where YY may be any two digit number, varying with the housing.