ets403 method of identification for instrument wiring

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  • STANLOW

    ENGINEERING TECHNICAL SPECIFICATION

    DOC: No. ETS 403

    SHELL HAVEN Title : METHOD OF IDENTIFICATION FOR

    INSTRUMENT WIRING

    Page 1 of 18

    Rev A

    WARNING All printed hard copies of this computerised ETS document are considered uncontrolled. This may not be the latest revision - please check the Index before use .ETS403 METHOD OF IDENTIFICATION FOR

    METHOD OF IDENTIFICATION FOR INSTRUMENT WIRING

    REV

    AMD

    DESCRIPTION

    DATE

    APPROVED BY

    SIGN.

    O Original. Written for QMS manual Dec 91 MGE/00/01 C J Taylor

    A Reviewed and Amended Dec 02 OME/00/06 PRJ/00/01 CME//00/01

    J Mason M Ravenscroft S Pain

    CUSTODIAN : OME/51/06 WRITTEN BY : PRJ/43/01/PB CHECKED : PRJ/43/01/PH APPROVED : CME/00/01, OME/00/06, PRJ/00/01 DISTRIBUTION : Engineering Technical Specifications Folder - SITE S DRIVE & ETS web

  • STANLOW

    ENGINEERING TECHNICAL SPECIFICATION

    DOC: No. ETS 403

    SHELL HAVEN Title : METHOD OF IDENTIFICATION FOR

    INSTRUMENT WIRING

    Page 2 of 18

    Rev A

    WARNING All printed hard copies of this computerised ETS document are considered uncontrolled. This may not be the latest revision - please check the Index before use .ETS403 METHOD OF IDENTIFICATION FOR

    INTRODUCTION This specification covers the system used for identifying Instrument cables and cable cores and replaces document R228/JAC. SCOPE Covers all new work at Stanlow Manufacturing Complex. Dispensation may be given for minor modifications to existing systems which employ a different but adequate identification system. CONTENTS 1.0 WIRING OF FIELD INSTRUMENTATION 1.1 Definition of Field Instrumentation 1.2 Definition of Field Cables 1.3 Installation of Field Cables 1.4 Identification of Field Cables 1.5 Identification of Field Junction Point 1.6 Identification of Terminals and Wire Cores 2.0 WIRING OF SYSTEM INSTRUMENTATION 2.1 Definition of System Instrumentation 2.2 Definition of System Cables 2.3 Identification of System Junctions 2.4 Identification of System Termination Points 2.5 Identification of System Cables 2.6 Identification of System Cable Cores 3.0 REFERENCES

  • STANLOW

    ENGINEERING TECHNICAL SPECIFICATION

    DOC: No. ETS 403

    SHELL HAVEN Title : METHOD OF IDENTIFICATION FOR

    INSTRUMENT WIRING

    Page 3 of 18

    Rev A

    WARNING All printed hard copies of this computerised ETS document are considered uncontrolled. This may not be the latest revision - please check the Index before use .ETS403 METHOD OF IDENTIFICATION FOR

    1.0 WIRING OF FIELD INSTRUMENTATION

    1.1 Definition of Field Instrumentation

    Field instrumentation is a description generally given to those items of instrument equipment mounted on the process plant itself. Transmitters of all types, temperature and position/status sensors, control valves, signal converters, solenoid valves, push buttons, etc, etc, are all regarded as field instrumentation when located on the process plant, tank farm, utilities area, etc. Generally, field instrumentation is the instrumentation that is not located inside a local or centralised control or auxiliary room.

    1.2 Definition of Field Cables

    Field cables are regarded as those cables which are employed to connect the signals from the field instrumentation back to the local or centralised Auxiliary Room. To be regarded as a field cable one end must be terminated on the plant area. (N.B. Certain cables can terminate in the process area without being classed as field cables - refer to 2.1).

    1.3 Installation of Field Cables

    The field multicore cable will be routed into the plant area where it shall be terminated in its own junction box. Only one multicore cable shall terminate in any field junction box.

    The field junction box shall be fitted with an external, stainless steel, engraved label which shall be engraved with the field junction box number. Where the junction box contains intrinsically safe circuits an external label shall clearly draw attention to the situation. No other information shall appear on the exterior of the box.

  • STANLOW

    ENGINEERING TECHNICAL SPECIFICATION

    DOC: No. ETS 403

    SHELL HAVEN Title : METHOD OF IDENTIFICATION FOR

    INSTRUMENT WIRING

    Page 4 of 18

    Rev A

    WARNING All printed hard copies of this computerised ETS document are considered uncontrolled. This may not be the latest revision - please check the Index before use .ETS403 METHOD OF IDENTIFICATION FOR

    1.4 Identification of Field Cables

    Ref. Drawing IWS 1.

    Each field cable shall be given a unique identifier made up as follows:-

    FIELD MULTICORE

    XXE001

    |||||| Plant or Unit ---+-+-- Unique serial number. Starting at 001 for each Number | cable Unit/Signal type group and continuing | sequentially. Always written as three digit | number. | +--------Signal type

    FIELD SINGLE CABLE

    XXE00103 |||||||| +-+-+ + | | As Field -------+ +----Single cable serial number Multicore (derived from the multicore pair number used).

    1.4.1 Plant/Unit Number

    Usually the cables have both ends terminated on the same Plant/Unit and the first two digits are those of the unit number. Where a cable is routed between two different units the cable will take the number of the unit on which the measurements are made or statuses sensed/set. Where units are sub-divided this should be reflected in the cable number:-

  • STANLOW

    ENGINEERING TECHNICAL SPECIFICATION

    DOC: No. ETS 403

    SHELL HAVEN Title : METHOD OF IDENTIFICATION FOR

    INSTRUMENT WIRING

    Page 5 of 18

    Rev A

    WARNING All printed hard copies of this computerised ETS document are considered uncontrolled. This may not be the latest revision - please check the Index before use .ETS403 METHOD OF IDENTIFICATION FOR

    UNIT9900

    -------- | | --------

    SUBDIVIDED -------- | +------------+------------+------------+------------+------------+ | | | | | | -------- -------- -------- -------- -------- -------- UNIT9910 UNIT9920 UNIT9930 UNIT9940 UNIT9950 UNIT9960 -------- -------- -------- -------- -------- -------- | | | | | | +------------+------------+------------+------------+------------+ |

    CABLES |

    +------------+------------+------------+------------+------------+ | | | | | | ------ ------ ------ ------ ------ ------ 99E101 99E201 99E301 99E401 99E501 99E601 ------ ------ ------ ------ ------ ------

    The first digit of the cables three-digit serial number is used to indicate the sub unit.

    NB. Such sub-division must be done with great care and a cabling assessment must be carried out before the system is adopted, as the system will be limited to 99 cables per sub-unit of any one numbering group. The system must not be employed if there is any possibility of running out of numbers. Under no circumstances shall any lower level of sub-division be attempted.

    1.4.2 Signal Type

    The second component of the cable identifier indicates the signal type. Only five variations are possible:-

    E - for cables carrying any analogue or digital signals including low

    level thermo-couple or resistance thermometer signals which do not form part of an intrinsically safe circuit.

    EI - as for 'E' type but where the signals form part of an intrinsically safe circuit.

    P - for pneumatic cables carrying air signals.

  • STANLOW

    ENGINEERING TECHNICAL SPECIFICATION

    DOC: No. ETS 403

    SHELL HAVEN Title : METHOD OF IDENTIFICATION FOR

    INSTRUMENT WIRING

    Page 6 of 18

    Rev A

    WARNING All printed hard copies of this computerised ETS document are considered uncontrolled. This may not be the latest revision - please check the Index before use .ETS403 METHOD OF IDENTIFICATION FOR

    1.4.3 Unique Serial Number Each cable in a Plant / Unit / Signal Type group will carry a unique three digit serial

    number. Numbering for all groups will start at 001 and progress numerically. Gaps in numbering shall be avoided.

    (Under certain circumstances the first digit may be the unit sub group number ref 1.4.1

    Plant / Unit Number). The field multicore cable identifier is used to identify all field single cables with an

    additional one or two digits suffixed. The suffix is the number of the pair / triple / quad bundle within the multicore cable to which the single cable connects.

    If a field single cable carries more than one signal, using a number of pairs etc, then

    the suffix is the highest number of the pair / triple / quad bundle within the multicore cable to which the single cable connects.

    E.g. 99EI00101 is a single field cable connected to pair number 1 of multicore

    99EI001. 99E01217 is a single cable connected to pair number 17 of multicore 99E012. 1.4.4 General a) Cable numbers shall not contain spaces, hyphens, obliques or any characters

    or symbols other than those permitted above. Only upper case characters shall be used.

    b) Cable numbers shall be shown on documentation and drawings as they will

    appear in reality. 1.5 Identification of Field Junction Point The junction point at which the field multicore cable merges with its field single cables Shall be given an identifier. The junction identifier is made up of the main multicore cable identifier with J placed between the Plant / Unit element and the Signal Type element. E.g. Field Multicore Identifier Field Junction Point (Box) Identifier 99E015 99JE015 The junction identifier is written without spaces or ay other characters or symbols. 1.6 Identification of Terminals and Wire Cores The terminals within the field junction box shall be numbered consecutively from one onwards. Each core of the multicore cable shall bear a ferrule carrying the same number as the terminal to which it is connected. Similarly the cores of the single

    cables will bear a ferrule carrying the same number as the terminals to which they are connected. The cores of the single field cable are ferruled identically at both ends.

  • STANLOW

    ENGINEERING TECHNICAL SPECIFICATION

    DOC: No. ETS 403

    SHELL HAVEN Title : METHOD OF IDENTIFICATION FOR

    INSTRUMENT WIRING

    Page 7 of 18

    Rev A

    WARNING All printed hard copies of this computerised ETS document are considered uncontrolled. This may not be the latest revision - please check the Index before use .ETS403 METHOD OF IDENTIFICATION FOR

    Refer to drawing IWS.2. Screen drain wires will not be ferruled but full details of their termination will always be shown on drawings. At the system end the field cable will be ferruled in the same manner as at its field end i.e. a core within a field multicore cable will be identically ferruled t both ends. Refer drawing IWS.3. 2.0 WIRING OF SYSTEM INSTRUMENTATION 2.1 Definition of System Instrumentation System instrumentation is usually that part of the system which is located in the

    control centre or auxiliary room. i.e. control consoles, trip amplifier cabinets, zener barrier cabinets, cross-patching cabinets, etc. Such items individually are referred to as system junctions. An analyser house or local control panel may also be classed as a system junction. In such cases it is possible to have a system junction with a field junction within it, e.g.

    an analyser house will have several cables running into it to connect specific pieces of equipment to their auxiliary room mounted programmers or controllers. Such cables shall be classed as system cables. At the same time a cable could run to the

    analyser house and be terminated in a junction box inside the analyser house where it could

    pick up the outputs of several different analysers this cable shall be classed as a field cable. 2.2 Definition of System Cables A system cable is any cable used to interconnect system junctions. It will usually run between cabinets and/or consoles within the control / auxiliary room although this is

    not always the case (ref 2.1). For the purposes of this specification the title system cable does not have any engineering implication, such cables may be plug and socket connected or screw terminal connected, non armoured or armoured, etc, etc. 2.3 Identification of System Junctions 2.3.1 I,O,Q,U and Z are ILLEGAL characters in this system. 2.3.2 System junctions may be in locations other than the main central / auxiliary

    Room, e.g. local panels, analyser houses etc. In certain circumstances a system junction may consist of two or more

    cabinets. This could be advantageous if, for example, a vendor supplies a multiplexer which consists of three cabinets, each containing several racks of electronics. If the vendors documentation refers to the racks as being sequentially numbered through the three cabinets, then by giving the three

  • STANLOW

    ENGINEERING TECHNICAL SPECIFICATION

    DOC: No. ETS 403

    SHELL HAVEN Title : METHOD OF IDENTIFICATION FOR

    INSTRUMENT WIRING

    Page 8 of 18

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    WARNING All printed hard copies of this computerised ETS document are considered uncontrolled. This may not be the latest revision - please check the Index before use .ETS403 METHOD OF IDENTIFICATION FOR

    cabinets one junction identifier and each rack a consecutive termination point identifier, the drawings package and the vendor drawing set will be better aligned.

    Conversely, a single cabinet could be divided into two or more System

    Junctions. This could be helpful, where considering it as a single System Junction, would result in an unacceptably large number of termination points,

    e.g. a console with an upper section heavily loaded with alarm indicators could be regarded as two System Junctions. This should only be employed, when the design of the equipment allows for clear physical boundaries to be recognised for the individual System Junction.

    2.3.3. Each system junction may be given a conventional title or name and may be

    labelled as such e.g. Logic Cabinet No.1, Console No.1, K9907 Local Panel, etc, etc.

    Such a name or title does not play any part in the system wiring identification. However, it is essential that every system junction be given a system junction

    identifier. The system junction identifiers start at A and proceed through the legal characters set to Y. Once the A to Y identifiers have been used up the sequence is extended by the use of a numeric prefix, e.g.

    A, B, C --- W, X, Y, 1A, 1B --- 1Y, 2A, 2B, etc. The identifier is used only to give each junction a unique identification and no

    attempt shall be made to link blocks of identifiers with equipment types as this will invariably lead to gaps of unused identifiers in the system.

    Identifiers must be used sequentially i.e. the next available identifier will be

    used for the next system junction to be installed. 2.3.4 Cables which run between different control / auxiliary rooms shall be identified

    as system cables. Care shall be taken that cables do not run between the same system junction number in each control / auxiliary room.

    2.3.5 Cables which run between an auxiliary room and a switchroom / substation

    shall be treated as system cables. This will require the piece of equipment in the switchroom / substation to be given a system junction number.

    2.4 Identification of System Termination Points A system termination point is the point at which the cores of a cable terminate within a system junction. The termination points within each system junction shall each be given an identifier which shall be unique within that junction. The identifiers shall start at A and run sequentially without leaving gaps through to 9Y, using the legal character set. Once the A to Y identifiers have been used up the sequence is extended by the use of a numeric prefix, e.g.

  • STANLOW

    ENGINEERING TECHNICAL SPECIFICATION

    DOC: No. ETS 403

    SHELL HAVEN Title : METHOD OF IDENTIFICATION FOR

    INSTRUMENT WIRING

    Page 9 of 18

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    WARNING All printed hard copies of this computerised ETS document are considered uncontrolled. This may not be the latest revision - please check the Index before use .ETS403 METHOD OF IDENTIFICATION FOR

    A, B, C ------------ W, X, Y, 1A, 1B ----------- 1Y, 2A, 2B, etc The termination identifiers are only unique within that particular system junction i.e. in each system junction the first termination point shall be identified as A. Example of identification of termination points. 2.4.1 Drawing IWS4 illustrates a typical arrangement of system cabinets

    interconnected by plug socket system cables. System junction A is a cross-patching cabinet where the outgoing system cables are connected by plugs and sockets. The system cable termination points are the socket / terminal strip clusters L, M,N, etc. At junction A the whole cluster may be identified with one termination point identifier. The other end of the system cables from AM and AN terminate in sockets inside system junction B. In this junction the wiring from the back of the sockets will probably fan out in a random manner to the various electronics bins and/or component bases so it is not possible to have a socket / terminal cluster as a termination point. In such cases the termination point is simply the system cable socket.

    2.4.2 Where a similar system is installed without the use of plug and socket connectors then the system cables terminal rail in system junction A would still be divided into sections to match the cable size, each section being a termination point. The label at the head of each termination point will carry the system cable identifier as well as the termination point identifier. In system junction B cabinet the system cables could terminate on terminal rails which would be laid out in the same manner as those in system junction A, or alternatively the cable might connect directly onto a piece of equipment mounted in system junction B in which case that piece of equipment would be identified as the termination point.

  • STANLOW

    ENGINEERING TECHNICAL SPECIFICATION

    DOC: No. ETS 403

    SHELL HAVEN Title : METHOD OF IDENTIFICATION FOR

    INSTRUMENT WIRING

    Page 10 of 18

    Rev A

    WARNING All printed hard copies of this computerised ETS document are considered uncontrolled. This may not be the latest revision - please check the Index before use .ETS403 METHOD OF IDENTIFICATION FOR

    2.5 Identification of System Cables Each system cable shall have a unique identifier which shall be made up of the system junction and termination point identifiers for both ends of the cable e.g. __________________________________________________________________________________ FIRST END SECOND END __________________________________________________________________________________ SYSTEM TERMINATION SYSTEM TERMINATION SYSTEM JUNCTION POINT JUNCTION POINT CABLE IDENTIFIER __________________________________________________________________________________ A J K P AJKP 1B L 2K C 1BL2KC 1B E L R LR1BE * 1K 1E 1J 1F 1J1F1K1E * __________________________________________________________________________________ * The cable identifier is always written with the following format :- ******** |||||||| Lowest order junction________________.+ |||| +_______________Highest order junction identifier and + + identifier and Corresponding ________________________| |___________________Corresponding termination identifier termination identifier The system cable identifiers are written without spaces using only the legal character set. Obliques, hyphens or any other symbols shall not be added. 2.6 Identification of System Cable Cores 2.6.1 All system cable cores shall be clearly identified. In reality the core will carry marking ferrules bearing its identification. System cables fitted with plugs shall not have ferrules within the plug tops. The ferrule o a core end will be made up of the termination reference of the point where that end of that core is terminated. The termination point identifier label will also be marked with the system cable identifier. 2.6.2 Ref. Drawing IWS.4

  • STANLOW

    ENGINEERING TECHNICAL SPECIFICATION

    DOC: No. ETS 403

    SHELL HAVEN Title : METHOD OF IDENTIFICATION FOR

    INSTRUMENT WIRING

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    WARNING All printed hard copies of this computerised ETS document are considered uncontrolled. This may not be the latest revision - please check the Index before use .ETS403 METHOD OF IDENTIFICATION FOR

    In System Junction A the wires between the socket connector and termination point M would not bear a ferrule at the socket end, but would bear an identifier at the terminal rail end. The ferrules would be M1, M2, M3, etc, etc. 2.6.3 Ref. Drawing IWS.5 (Wiring within a system junction) The wiring cores within system junction B are identified where they connect onto the equipment and terminal rails if sockets are not used. The identifier is automatically dictated by the termination point identifier and terminal number at the other end of the core. Clearly it is at this point where a degree of flexibility is required and the dictates of the particular equipment or system being connected to will determine the means of identification code building. The following points must be borne in mind when laying down the make-up of the identifier code :- a) Only characters from the legal character set should be used. b) Only characters and symbols which can be obtained on marker ferrules can be used. c) An electronic equipment bin shall be given a termination point identifier. d) The identifier must be constructed to avoid ambiguity i.e. 1128 could mean bin 1, slot 12, terminal 8 or bin 11, slot 2, terminal 8. e) Separation of groups by obliques etc. shall be avoided use shall be made of leading zeros. f) The maximum length of the identifier must be assessed to ensure that the ferrule can always physically carry sufficient characters. g) The use of colour coding or colour combination coding shall not be used as sole identification. h) The finally chosen code make up shall be clearly defined on all relevant documentation and shall be consistently adhered to. The following points are illustrated on drawing IWS.5 :- i) A core marking system has been devised for use within this junction using the termination point / slot no. / terminal identifier make-up. ii) Ferruling of cores at the back of the socket shall no be attempted. iii) Where socket pins are identified with lower case letters then no attempt is made to use them. Instead equivalent pin numbers are

  • STANLOW

    ENGINEERING TECHNICAL SPECIFICATION

    DOC: No. ETS 403

    SHELL HAVEN Title : METHOD OF IDENTIFICATION FOR

    INSTRUMENT WIRING

    Page 12 of 18

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    WARNING All printed hard copies of this computerised ETS document are considered uncontrolled. This may not be the latest revision - please check the Index before use .ETS403 METHOD OF IDENTIFICATION FOR

    assigned and used (check to see if a local standard exists before assigning numbers arbitrarily). iv) A socket / terminal cluster may be used as illustrated in BL. The marking would be as specified in sections 2.6.1 and 2.6.2. 3.0 REFERENCES IWS.1 Identification of Field Cables. IWS.2 Identification of Field Junction Box Terminals. IWS.3 Identification of Field Multicores. IWS.4 Identification of System Cable. IWS.5 Identification of Wiring within a System Junction.

  • STANLOW

    ENGINEERING TECHNICAL SPECIFICATION

    DOC: No. ETS 403

    SHELL HAVEN Title : METHOD OF IDENTIFICATION FOR

    INSTRUMENT WIRING

    Page 13 of 18

    Rev A

    WARNING All printed hard copies of this computerised ETS document are considered uncontrolled. This may not be the latest revision - please check the Index before use .ETS403 METHOD OF IDENTIFICATION FOR

  • STANLOW

    ENGINEERING TECHNICAL SPECIFICATION

    DOC: No. ETS 403

    SHELL HAVEN Title : METHOD OF IDENTIFICATION FOR

    INSTRUMENT WIRING

    Page 14 of 18

    Rev A

    WARNING All printed hard copies of this computerised ETS document are considered uncontrolled. This may not be the latest revision - please check the Index before use .ETS403 METHOD OF IDENTIFICATION FOR

  • STANLOW

    ENGINEERING TECHNICAL SPECIFICATION

    DOC: No. ETS 403

    SHELL HAVEN Title : METHOD OF IDENTIFICATION FOR

    INSTRUMENT WIRING

    Page 15 of 18

    Rev A

    WARNING All printed hard copies of this computerised ETS document are considered uncontrolled. This may not be the latest revision - please check the Index before use .ETS403 METHOD OF IDENTIFICATION FOR

  • STANLOW

    ENGINEERING TECHNICAL SPECIFICATION

    DOC: No. ETS 403

    SHELL HAVEN Title : METHOD OF IDENTIFICATION FOR

    INSTRUMENT WIRING

    Page 16 of 18

    Rev A

    WARNING All printed hard copies of this computerised ETS document are considered uncontrolled. This may not be the latest revision - please check the Index before use .ETS403 METHOD OF IDENTIFICATION FOR

  • STANLOW

    ENGINEERING TECHNICAL SPECIFICATION

    DOC: No. ETS 403

    SHELL HAVEN Title : METHOD OF IDENTIFICATION FOR

    INSTRUMENT WIRING

    Page 17 of 18

    Rev A

    WARNING All printed hard copies of this computerised ETS document are considered uncontrolled. This may not be the latest revision - please check the Index before use .ETS403 METHOD OF IDENTIFICATION FOR

  • STANLOW

    ENGINEERING TECHNICAL SPECIFICATION

    DOC: No. ETS 403

    SHELL HAVEN Title : METHOD OF IDENTIFICATION FOR

    INSTRUMENT WIRING

    Page 18 of 18

    Rev A

    WARNING All printed hard copies of this computerised ETS document are considered uncontrolled. This may not be the latest revision - please check the Index before use .ETS403 METHOD OF IDENTIFICATION FOR