1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNational Differences ForUL 61131-2Standard for Programmable Controllers - Part 2: Equipment Requirements and TestsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WI
2、THOUT PERMISSION FROM ULNational Differences ForUL 61131-2Standard for Programmable Controllers - Part 2: Equipment Requirements and TestsEdition: 2Edition Date: June 5, 2008Revision pages are being issued to reflect the recent reaffirmation of UL 61131-2 as an AmericanNational Standard. No changes
3、in requirements are involved.This document provides a single listing of the National Differences included in the UL adoption ofthe corresponding IEC standard.All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, ortransmitted in any form by any means, elec
4、tronic, mechanical photocopying, recording, or otherwisewithout prior permission of UL.UL provides this standards document as is without warranty of any kind, either expressed or implied,including but not limited to, the implied warranties of merchantability or fitness for any purpose.In no event wi
5、ll UL be liable for any special, incidental, consequential, indirect or similar damages,including loss of profits, lost savings, loss of data, or any other damages arising out of the use of or theinability to use this standards document, even if UL or an authorized UL representative has been advised
6、of the possibility of such damage. In no event shall ULs liability for any damage ever exceed the pricepaid for this standards document, regardless of the form of the claim.Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold ULharmless from and against a
7、ny loss, expense, liability, damage, claim, or judgment (including reasonableattorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronicStandard on the purchasers computer system.Copyright 2012 Underwriters Laboratories Inc.NOVEMBER 29, 2012NATIONAL DIFF
8、ERENCES FOR UL UL 61131-22UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULPrefaceThis document provides a single listing of the technical National Differences included in the UL adoptionof the corresponding IEC standard.In its IEC-based standa
9、rds, UL uses the notations indicated below to identify national difference type, andthese types are additionally noted in this document. The standard may not use all types of thesedeviations.D1 - These are deviations which are based on basic safety principles and requirements, elimination ofwhich wo
10、uld compromise safety for U.S. consumers and users of products.D2 - These are deviations based on safety practices. These are deviations for IEC requirements that maybe acceptable, but adopting the IEC requirements would require considerable retesting or redesign on themanufacturers part.DC - These
11、are deviations based on the component standards and will not be deleted until a particularcomponent standard is harmonized with the IEC component standard.DE - These are deviations based on editorial comments or corrections.DR - These are deviations based on the national regulatory requirements.Each
12、 national difference contains a description of what the national difference entails. Typically one of thefollowing words is used to explain how the text of the national difference is to be applied to the base IECtext:Addition / Add - An addition entails adding a complete new numbered clause, subclau
13、se, table,figure, or annex. Addition is not meant to include adding select words to the base IEC text.Deletion / Delete - A deletion entails complete deletion of an entire numbered clause, subclause,table, figure, or annex without any replacement text.Modification / Modify - A modification is an alt
14、ering of the existing base IEC text such as theaddition, replacement or deletion of certain words or the replacement of an entire clause,subclause, table, figure, or annex of the base IEC text.NOVEMBER 29, 2012 NATIONAL DIFFERENCES FOR UL UL 61131-2 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHE
15、R REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNational Differences1.1DV DR Modification to Paragraph 4 of 1.1:Equipment operating at more than 600 V is considered as high voltage equipment withrespect to the requirements in the National Electrical Code.1.101DV DR Addition of the following
16、to 1.1:This equipment is intended for installation in accordance with the National Electrical Code(NEC) for use in ordinary locations. Requirements based on the NEC are found in AnnexDVA of this document.1.2DV DR Modification to Clause 1.2:This clause is considered informative.1.102DV D2 Additions t
17、o 1.3:1.102DV.1 A component of a product covered by this standard shall comply with therequirements for that component. See Annex DVB for a list of standards coveringcomponents used in the products covered by this standard.1.102DV.2 A component is not required to comply with a specific requirement t
18、hat:a) Involves a feature or characteristic not required in the application of thecomponent in the product covered by this standard, orb) Is superseded by a requirement in this standard.1.102DV.3 A component shall be used in accordance with its rating established for theintended conditions of use.1.
19、102DV.4 Specific components are incomplete in construction features or restricted inperformance capabilities. Such components are intended for use only under limitedconditions, such as certain temperatures not exceeding specified limits, and shall be usedonly under those specific conditions.1.102DV.
20、5 See Annex DVC for Normative References that replace IEC NormativeReferences.2DV D2 Modification to Clause 2:This clause and all its subclauses are informative.NOVEMBER 29, 2012NATIONAL DIFFERENCES FOR UL UL 61131-24UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITH
21、OUT PERMISSION FROM UL4.1.1DV D2 Modification to 4.1.1:The equipment shall be suitable for operating in a temperature range from 5C to 25C forboth open and enclosed equipment and shall be marked in accordance with Table11.15DV.1.1.4.1.2DV D2 Modification to 4.1.2:This clause is informative.4.2DV D2
22、Modification to 4.2:This clause and its subclauses are informative.4.3DV D2 Modification to 4.3:This clause and its subclauses are informative.4.4DV D2 Modification to 4.4:This clause and its subclauses are informative.4.5DV D2 Modification to 4.5:This clause and its subclauses are informative.5DV D
23、2 Modification to 5:This clause and its subclauses are informative.6DV D2 Modification of 6:This clause and its subclauses are informative.6.4.1DV DE Modification:Modify second dashed item by replacing S with Second.7DV D2 Modification of 7:This clause and its subclauses are informative.8DV D2 Modif
24、ication of 8:This clause and all its subclauses are informative.9DV D2 Modification of 9:This clause and all its subclauses are informative.10DV D2 Modification of 10:This clause is informative.NOVEMBER 29, 2012 NATIONAL DIFFERENCES FOR UL UL 61131-2 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTH
25、ER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL11.1DV D2 Modification of 11.1:Protection against electric shock is only required in normal conditions, and isdemonstrated by compliance with the normal condition requirements of the following:dielectric strength requirements in 11.1.4, the sh
26、ock protection requirements of 11.1.5, thenormal condition requirements of 11.1.6, and the clearance and creepage requirements in11.4.11.101DV D2 Addition to 11.1:Circuits identified in Annex DVD as not posing a risk of electric shock do not requireadditional evaluation other than as noted in Annex
27、DVD.11.1.1.1DV D2 Modification to part b) of 11.1.1.1:Reference UL 61010C-1, Annex A, Figures A.1, A.2 and A.3 for current measuring.11.1.1.2DV.1 D2 Modification to part b) and c) of 11.1.1.2:Reference UL 61010C-1, Annex A, Figures A.1, A.2 and A.3 for current measuring.11.1.1.2DV.2 D2 Modification
28、of 11.1.1.2 by adding the following item d):d) Circuits identified in Annex DVD as not posing a risk of electric shock do not requireadditional evaluation other than as noted in Annex DVD.11.1.3DV D2 Modification of 11.1.3:11.1.3DV.1 The minimum required enclosure rating is type 1 as defined in Anne
29、x DVE.11.1.3DV.2 Class 2, limited voltage/current and limiting impedance circuits, as describedin Annex DVD, need not be so enclosed.11.1.3.2DV DR Modification of 11.1.3.2:Class II construction is not permitted for permanently connected equipment.11.1.3.3DV D2 Modification of 11.1.3.3 by adding the
30、following:11.1.3.3DV.1 Internal wiring11.1.3.3DV.1.1 For other than Class 2 or Class 3 circuits, as defined in Article 725 of theNational Electrical Code, NFPA 70, the equipment shall be constructed so that a conductor,including a field-installed conductor of any circuit is segregated by means of a
31、minimumpermanent 6.4 mm physical separation or separated by means of a barrier from physicalcontact with:a) A conductor connected to any other circuit unless the conductors of bothcircuits shall be insulated for the maximum voltage of either circuit.b) An uninsulated live part of any other circuit.N
32、OVEMBER 29, 2012NATIONAL DIFFERENCES FOR UL UL 61131-26UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL11.1.3.3DV.1.2 A conductor subject to movement during normal operation shall maintainseparation of circuits during the full range of movemen
33、t.11.1.3.3DV.1.3 Isolated secondary circuits as defined in Annex DVD are considered tocomply with these requirements.11.1.4DV D2 Modification of 11.1.4 by adding the following:11.1.4DV.1 Dielectric strength tests conducted in conjunction with temperature, Overloadand Endurance tests outlined in Clau
34、se 12 are considered to cover requirements in thisclause.11.1.4DV.2 The dielectric withstand type test of 12.2.1 must be carried out for equipmentrated not more than 50 volts.11.1.7DV D2 Modification of 11.1.7 by adding the following:Protection against electric shock is only required in normal condi
35、tions. This nationaldifference does not apply to isolated secondary circuits as noted in Annex DVD.11.1.7.1DV D2 Modification of 11.1.7.1 by adding the following:Operator-accessible conductive parts shall be bonded to the protective earth terminal. Thisnational difference is only needed if the natio
36、nal difference 11.1DV is applied.11.1.7.3DV D2 Modification of 11.1.7.3:Evaluation of secondary circuits under normal and abnormal conditions are as noted inAnnex DVD.11.3DV.1 DR Modification of 11.3:Class 2 circuits, as defined in Annex DVD, are considered equivalent to Limited PowerCircuits.11.3DV
37、.2 DR Modification of Table 45 and 46:Add table 11(a) and (b) of the National Electrical Code, NFPA 70, as replacement tablewithout class 3 columns.11.5.1DV D2 Modification of 11.5.1 by adding the following:See Annex DVE for requirements applicable to enclosures.11.5.2DV D2 Modify 11.5.2 by adding t
38、he following:11.5.2DV.1 Insulating material11.5.2DV.1.1 As an alternative to the glow wire test, material that is used for the directsupport of an uninsulated live part shall comply with the Hot Wire Ignition (HWI), andHigh-Current-Arc Resistance to Ignition (HAI) values indicated in Table 11.5.2DV.
39、1.1.1. NoNOVEMBER 29, 2012 NATIONAL DIFFERENCES FOR UL UL 61131-2 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULadditional evaluation is required for the direct support of uninsulated live parts whengeneric material is provided in the thick
40、ness indicated in Table 11.5.2DV.1.1.2. A materialis in direct support of an uninsulated live part when:a) It is in direct physical contact with the uninsulated live part; andb) It serves to physically support or maintain the relative position of theuninsulated live part.Table 11.5.2DV.1.1.1 HWI and
41、 AI characteristics:Flammability Category V-0 V-1 V-2 HBPart Thickness, mm See note See note See note See noteHWI Time to ignite,seconds Minimum7 153030Performance LevelCategory (PLC)PLC=4 PLC=3 PLC=2 PLC=2HAI Minimum numberof arcs to ignitePerformance LevelCategory (PLC)15 30 30 60HAI PerformanceLe
42、vel Category (PLC)PLC=3 PLC=2 PLC=2 PLC=1Note: The thickness of the material used in the equipment shall not be less than the thickness of samples subjectedto hot wire ignition and arc ignition tests. Performance Level Categories are defined in UL Plastics Directory.Table 11.5.2DV.1.1.2 Generic mate
43、rials for direct support of uninsulated live partsGeneric Material Thickness, mm RTI, CDiallyl Phthalate 0.71 105Epoxy 0.71 105Melamine 0.71 130Melamine-Phenolic 0.71 130Phenolic 0.71 150Unfilled Nylon 0.71 105Unfilled Polycarbonate 0.71 105Urea Formaldehyde 0.71 100Ceramic, Porcelain, and Slate No
44、limit No limitBeryllium Oxide No limit No limitNOTE Each material shall be used within its minimum thickness and its Relative Thermal Index (RTI) value shallnot be exceeded during the Temperature Test, 12.1.5.11.5.2DV.1.2 The requirements for parts of insulating materials other than those necessaryt
45、o retain current carrying parts in position does not apply.NOVEMBER 29, 2012NATIONAL DIFFERENCES FOR UL UL 61131-28UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL11.5.2DV.2 Insulating barriers11.5.2DV.2.1 When a barrier is used to comply with
46、 spacing requirements, the insulatingmaterial used shall comply with one of the following criteria:a) The barrier shall be a generic direct support material provided in the thicknessindicated in Table 11.5.2DV.1.1.2.b) The barrier shall be a generic barrier material provided in the thicknessindicate
47、d in Table 11.5.2DV.2.1.1 when the insulating barrier does not physicallysupport or maintain the relative position of the uninsulated parts involved; orc) The barrier shall comply with the hot wire ignition (HWI) and high-current arcresistance to ignition (HAI) values indicated in Table 11.5.2DV.1.1
48、.1. When thebarrier is provided in lieu of clearance distance only, is not within 0.8 mm ofuninsulated live parts, and does not physically support or maintain the relativeposition of uninsulated parts involved, the insulating material is only required tocomply with the HAI values in Table 11.5.2DV.1
49、.1.1. The thickness of the barriershall be one of the following:1) Not less than 0.71 mm thick;2) Not less than 0.33 mm thick plus one-half required clearance spacingswhen the barrier is provided in lieu of required clearance distance only; or3) Evaluated in accordance with the internal barrier requirements in UL746C.Table 11.5.2DV.2.1.1 Generic barrier materialsGeneric material Minimum thickness, mm RTI, CGeneric material 0.25 105Aramid Paper 0.71 105Cambric 0.71 105Electrical Grade Paper 0.71 105Epoxy 0.71 105Mica 0.15 105Mylar (PETP) 0.18 105RTV 0.71 105Sil
