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Emerson 2468CD, 2468CB manual 4.4ELECTRICAL INSTALLATION, comply with the EMC directive

Models: 2468CD 2468CB

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4.4ELECTRICAL INSTALLATION

Hydrastep 2468CB & 2468CD Manual

Remote Display Options 24683B, C & D

4.4ELECTRICAL INSTALLATION

Up to six remote displays may be driven by the Hydrastep 2468 unit. One remote display can be powered from the main unit, but all the others must have a local supply. A remote display has a dual serial data input and a dual power input. When the remote display is powered from the main unit an eight-core cable is required to connect the two units. When a remote display is locally powered, however, a six-core cable will suffice. See the example in Figure 4.4: remote display unit 1 is powered from the main unit and uses an eight-core cable; remote display unit 2 is locally powered and uses a six-core cable. All cables must be screened to

comply with the EMC directive.

For remote displays powered from the main unit the loop resistance of the power conductors must be less than 27 ohms for an a.c. powered unit or 7 ohms for a d.c. unit. To provide for cable runs of up to 1000 metres, without the use of heavy cables, the main unit and the remote display unit each have internally linked multiple terminals for the power and ground connections. This allows the power and ground lines to be doubled to reduce the loop resistance.

Figure 4.2 - Interconnection cable for a single remote display

24685034

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Emerson 2468CD, 2468CB manual 4.4ELECTRICAL INSTALLATION, comply with the EMC directive

Contents

Hydrastep Hydrastep 2468CB and 2468CDElectronic Gauging System Dual Power Supply VersionSOLUTION See Note SYMPTOMCATEGORY POSSIBLE CAUSES See NoteMobrey Customer Support HYDRASTEP START-UPPart 1 – Electrical/Electronic System About this manualPart 2 – Pressure Parts Part 3 – AppendixSymbol Meaning SYMBOLS USED IN THIS MANUAL AND ON THE UNITPage Hydrastep 2468CB & 2468CD PartElectronic Gauging System 2468503424685034 Pt.1-2DANGEROUS VOLTAGES ARE PRESENT IN 24685034 Pt.1-4Part Contents24685034 Pt.1-6Illustrations ContentsPage No Tables24685034 Hydrastep 2468CB and 2468CD Manual0040 1.1WATER LEVEL MEASUREMENT 24685034 Hydrastep 2468CB and 2468CD Manual1.2.2DISPLAY BOARD 1.2HYDRASTEP 2468 ELECTRONIC GAUGING SYSTEM1.2.1INPUT BOARDS 1.2.3SYSTEM FAULTS 2468CB OR 2468CD 1.3SYSTEM OPTIONS1.3.1OUTPUT BOARDS 1.3.2REMOTE DISPLAY UNITSExisting System Table 1.1 - Upgrade paths and available optionsAvailable Options Comments24685034 Hydrastep 2468CB and 2468CD ManualContents 2468CB & 2468CD Dual Power Supply VersionSPECIFICATION FAULT ANALYSIS & CORRECTIVE ACTION2-23 2-322.2ELECTRODE CABLING SYSTEM 2.1INTRODUCTION2.3ELECTRONIC ENCLOSURE Number of24685034 2468CB & 2468CD Dual Power Supply VersionHydrastep 2468CB and 2468CD Manual 2.3.2REMOTE DISPLAY DRIVE CAPABILITY 2.3.1INPUT BOARD PCB 24680501 AND PCB2.3.1.1Analogue Output Drive Capability 2.3.3.1Link LK1 2.3.3DISPLAY BOARD PCBNo. of Electrodes used 2.3.3.2Links LK2, LK3, LK4 and LK5Link Headers fitted 2.3.4PCB INTERCONNECTIONS2.4INSTALLATION 24685034 Hydrastep 2468CB and 2468CD ManualElectrode connections 2-10Water column connections for 16 electrodes 2-11Conductor Number2-12 2.4.2.3Connecting the Electrode Cable Assemblies to 2468 Enclosure2-13 AC Powered Units input board2.4.2.4Hydrastep Power Supply Cables Figure 2.4: Voltage Selection 240V or DC Powered Units input board2-14 2.4.2.5Analogue Output Connection 2-15Part of Display Board showing PL4 2.4.2.6Opto-IsolatedFault Output Connection2-16 2.5.1.1Analogue Output Configuration 2.5SYSTEM CONFIGURATION2-17 2.5.1INPUT BOARD PCB 24680501 OR2.5.1.3Electrode Error Configuration 2.5.1.2Pulsed Output Setting2-18 Input Board Option Board RemovedOffset voltages 2-192-20 2.5.2.1Link LK1 Setting2.5.2DISPLAY BOARD Table 2.2 - Number of electrodes being displayedHydrastep 2468CB and 2468CD Manual 2-212-22 2.5.2.3‘Switching Threshold’ Setting2.5.2.4 ‘Compatibility’ Setting 2-23 2.6FAULT ANALYSIS & CORRECTIVE ACTION2-24 FaultsIndication Analysis and Corrective ActionIndication 2-25Indication 2-262-27 FaultsIndication Analysis and Corrective Action2-28 FaultsIndication Analysis and Corrective ActionIndication 2-292-30 2.6.1COMPONENT REPLACEMENT2.6.1.1Removing the Input Board 24680501 or 2.6.1.2Refitting the Input Board2-31 2.6.2PARTS LIST - HYDRASTEP 2468 CB & CD VERSIONSItem Description Mobrey2-32 SPECIFICATIONContents Wiring Diagrams for Dual Power Supply Version2-WD.1 Page No2-WD.2 Wiring Diagrams for Dual Power Supply VersionHydrastep 2468CB and 2468CD Manual 2468503424685034 Wiring Diagrams for Dual Power Supply Version2-WD.3 2-WD.4 Wiring Diagrams for Dual Power Supply VersionHydrastep 2468CB and 2468CD Manual 2468503424685034 2-WD.52-WD.6 Wiring Diagrams for Dual Power Supply VersionHydrastep 2468CB and 2468CD Manual 2468503424685034 2-WD.72-WD.8 Wiring Diagrams for Dual Power Supply VersionHydrastep 2468CB and 2468CD Manual 2468503424685034 2-WD.9Hydrastep 2468CB and 2468CD Manual 2-WD.1024685034 24685034 2-WD.112-WD.12 Wiring Diagrams for Dual Power Supply VersionHydrastep 2468CB and 2468CD Manual 2468503424685034 2-WD.132-WD.14 Wiring Diagrams for Dual Power Supply VersionHydrastep 2468CB and 2468CD Manual 2468503424685034 2-WD.152-WD.16 Wiring Diagrams for Dual Power Supply VersionHydrastep 2468CB and 2468CD Manual 246850343a-1 2468 - Relay Output Board OptionContents 24685034 3a-23a-7 3a-3 3A.2 INSTALLATION3A.1 GENERAL DESCRIPTION 3a-4 3a-5 3A.2.3 ELECTRICAL INSTALLATION3a.2.3.1 PCB Interconnections 3a.2.3.2 Relay Output Connections3a-6 3A.3 RELAY BOARD CONFIGURATION3A.3.1 RELAY OUTPUT BOARD 3a.3.1.1 Configuring the Relay Output Board3a-7 3a-8 3a.3.2.1 Philosophy 3A.3.2 ALARM AND TRIPPING FACILITIES3a-9 3a-10 3a-11 3a-12 3a-13 3a-14 3a-15 3A.4 COMPONENT REPLACEMENT3a-16 3A.5 SPECIFICATION3b-1 Delay Relay Output Board OptionContents 3b-2 SPECIFICATION3B.5 246850343b-3 3B.2 INSTALLATION3B.1 GENERAL DESCRIPTION 3b-4 3b-5 3B.2.3 ELECTRICAL INSTALLATION3b.2.3.1 PCB Interconnections 3b.2.3.2 Relay Output Connections3b-6 3B.3 DELAY RELAY BOARD CONFIGURATION3b-7 3B.3.1 DELAY RELAY OUTPUT BOARD3b.3.1.1 Configuring the Delay Relay Output Board 3b-8 24685034 3b.3.1.6 Delay Circuit Configuration3b-9 3b-10 3b.3.1.7 Configuring the Delay Circuit Split Pads3b.3.2.1 Philosophy 3B.3.2 ALARM AND TRIPPING FACILITIES3b-11 3b-12 3b-13 3b-14 3b-15 3b-16 3b-17 3B.4 COMPONENT REPLACEMENT3b-18 3B.5 SPECIFICATIONContents 2468 Opto-isolatedOutput Board OptionTables Illustrations3c-2 246850343c-3 3C.2 INSTALLATION3C.1 GENERAL DESCRIPTION 3c-4 3c.2.3.2 Opto-IsolatedOutput Connections 3c-53c-6 3C.3 OPTO-ISOLATEDOUTPUT BOARD CONFIGURATION3c-7 3c-8 3c.3.2.1 Philosophy 3C.3.2 ALARM AND TRIPPING FACILITIES3c-9 3c-10 3c-11 3c-12 3c-13 3c-14 3C.4 COMPONENT REPLACEMENT24685034 3C.5 SPECIFICATION3c-15 Opto-isolatedOutput Board Option 3c-16Hydrastep 2468CB & 2468CD Manual 24685034Contents Remote Display Options 24683B, C, & DFigure 4.1REMOTE DISPLAY OPTIONS 4.2CONFIGURATION 4.2.2RECONFIGURING THE 24683D REMOTE DISPLAY 4.3.2INSTALLING THE 24683D WALL MOUNTED UNIT 4.3MECHANICAL INSTALLATIONcomply with the EMC directive 4.4ELECTRICAL INSTALLATIONDaisy Chain 4.4.1STAR AND DAISY CHAIN CONNECTIONSStar 4.4.2EXAMPLE OF A ‘STAR CONNECTED’ SYSTEM 4-10 4.4.3EXAMPLE OF A `DAISY CHAIN SYSTEMService 4.4.4CONNECTING CABLES TO THE REMOTE DISPLAY4-11 Terminal4-12 4.4.5CONNECTING THE DISPLAY CABLES TO HYDRASTEP4.5SYSTEM OPERATION 4.6FAULT ANALYSIS AND CORRECTIVE ACTIONFault 4-134-14 Bottom half of faultFlickering Display 4-154-16 4.7COMPONENT REPLACEMENTItem Mobrey Part NumberDIMENSIONS 4.8SPECIFICATIONPOWER SUPPLY REMOTE DISPLAY UNITSRemote Display Options 24683B, C & D 4-18Hydrastep 2468CB & 2468CD Manual 24685034Operating Manual Hydrastep Pressure Parts24675030 Pt.2-2Pt.2-3 About this manualPart 2 - Pressure Parts 24675030 Pt.2-4ELECTRODE INSTALLATION R E M I N D E RCORRECT INCORRECT24675030 Pt.2-6Pt.2-7 N O T I C E24675030 Pt.2-8Installation Procedures Part 2 - Hydrastep Pressure PartsUnit Specifications - Hydrastep Fault Repair and Commissioning24675030 Pt.2-10PRINCIPLE OF OPERATION General IntroductionWATER LEVEL INDICATION IllustrationsHydrastep Pressure Parts General Introduction24675030 1.2WATER LEVEL INDICATION 1.1PRINCIPLE OF OPERATION24675030 General IntroductionGeneral Introduction 24675030Hydrastep Pressure Parts General Introduction24675030 Contents Installation ProceduresSCOPE OF PROCEDURES INSTALLATION OF WATER COLUMNHydrastep Pressure Parts Installation Procedures24675030 2.3INSTALLATION OF WATER COLUMN 2.1SCOPE OF PROCEDURES2.2STORAGE 2.2.4HANDLING PRECAUTIONSdiscarded Figure 2.1 - Universal weld profile 2.4INSPECTION OF MECHANICAL INSTALLATION WORK 24675030 Installation Procedures24675030 Installation ProceduresFigure 2.3 - Typical water column suspension Contents Fault Repair and CommissioningBACKGROUND WATER COLUMN COMMISSIONING OR RECOMMISSIONINGHydrastep Pressure Parts Fault Repair and Commissioning24675030 3.1.1SAFETY PRECAUTIONS 3.1BACKGROUND3.1.3.1Low Pressure Electrodes 3.1.2WATER COLUMN ISOLATION3.1.3ELECTRODE AND ELECTRODE SEAL LEAKS 3.1.3.2High Pressure Electrodes 3.2.1VENT AND DRAIN VALVE REPAIRS 3.2WATER COLUMN COMMISSIONING OR RECOMMISSIONING3.2.4WATER COLUMN LIFE 3.2.2WATER COLUMN TRANSIENT RESPONSE3.2.3WATER COLUMN OR PIPEWORK BLOCKAGE Hydrastep Pressure Parts Fault Repair and Commissioning24675030 Contents Unit Description24675030 Unit DescriptionHydrastep Pressure Parts Figure 4.1 - Low pressure electrode 4.1LOW PRESSURE ELECTRODESFigure 4.2 - High pressure electrode 4.2HIGH PRESSURE ELECTRODES4.3WATER COLUMN L.P 4.4WATER COLUMN H.P 4.5WATER COLUMN H.P. SUPERCRITICAL 24675030 Unit DescriptionHydrastep Pressure Parts 5.1ELECTRODES Unit Specifications - HydrastepSuper 5.2WATER COLUMNSSeries Hydrastep 2468CA, CB, CC & CD PartElectronic Gauging System Pt.3-1Pt3-2 A.1 GENERAL CSA CertifiedHydrastep 2468 - Technical Manual Page Appendix A: CSA Approval Page Emerson Process Management Mobrey Ltd HydrastepOperating Manual