4.4.2EXAMPLE OF A ‘STAR CONNECTED’ SYSTEM | Emerson 2468CD, 2468CB

4.4.2EXAMPLE OF A ‘STAR CONNECTED’ SYSTEM

Hydrastep 2468CB & 2468CD Manual

Remote Display Options 24683B, C & D

4.4.2EXAMPLE OF A ‘STAR CONNECTED’ SYSTEM

Figure 4.4 shows two remote displays connected in a ‘star’. Where more than one remote display is in use, local supplies with isolated outputs must be used to power the extra unit(s). Up to six remote displays can be supported (less their power requirements): with the full complement of units in use, three signal carrying conductors must be connected to each terminal.

Figure 4.4 - Star connection example for two remote displays

24685034

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Emerson 2468CD, 2468CB manual 4.4.2EXAMPLE OF A ‘STAR CONNECTED’ SYSTEM

Contents

Dual Power Supply Version Hydrastep 2468CB and 2468CDHydrastep Electronic Gauging System POSSIBLE CAUSES See Note SYMPTOMSOLUTION See Note CATEGORY Mobrey Customer Support HYDRASTEP START-UP Part 3 – Appendix About this manualPart 1 – Electrical/Electronic System Part 2 – Pressure Parts Symbol Meaning SYMBOLS USED IN THIS MANUAL AND ON THE UNITPage 24685034 PartHydrastep 2468CB & 2468CD Electronic Gauging System Pt.1-2 DANGEROUS VOLTAGES ARE PRESENT IN Pt.1-4 Part Contents Pt.1-6 Tables ContentsIllustrations Page No 0040 1.1WATER LEVEL MEASUREMENT 24685034 1.2.1INPUT BOARDS 1.2HYDRASTEP 2468 ELECTRONIC GAUGING SYSTEM1.2.2DISPLAY BOARD 1.3.2REMOTE DISPLAY UNITS 1.3SYSTEM OPTIONS1.2.3SYSTEM FAULTS 2468CB OR 2468CD 1.3.1OUTPUT BOARDS Comments Table 1.1 - Upgrade paths and available optionsExisting System Available Options 24685034 2468CB & 2468CD Dual Power Supply Version 2-32 FAULT ANALYSIS & CORRECTIVE ACTIONSPECIFICATION 2-23 Number of 2.1INTRODUCTION2.2ELECTRODE CABLING SYSTEM 2.3ELECTRONIC ENCLOSURE 2468CB & 2468CD Dual Power Supply Version 2.3.1.1Analogue Output Drive Capability 2.3.1INPUT BOARD PCB 24680501 AND PCB2.3.2REMOTE DISPLAY DRIVE CAPABILITY 2.3.3.1Link LK1 2.3.3DISPLAY BOARD PCB 2.3.4PCB INTERCONNECTIONS 2.3.3.2Links LK2, LK3, LK4 and LK5No. of Electrodes used Link Headers fitted 2.4INSTALLATION 24685034 Electrode connections 2-10 Number 2-11Water column connections for 16 electrodes Conductor 2-12 2.4.2.3Connecting the Electrode Cable Assemblies to 2468 Enclosure 2.4.2.4Hydrastep Power Supply Cables AC Powered Units input board2-13 2-14 DC Powered Units input boardFigure 2.4 Voltage Selection 240V or 2.4.2.5Analogue Output Connection 2-15 2-16 2.4.2.6Opto-IsolatedFault Output ConnectionPart of Display Board showing PL4 2.5.1INPUT BOARD PCB 24680501 OR 2.5SYSTEM CONFIGURATION2.5.1.1Analogue Output Configuration 2-17 Input Board Option Board Removed 2.5.1.2Pulsed Output Setting2.5.1.3Electrode Error Configuration 2-18 Offset voltages 2-19 Table 2.2 - Number of electrodes being displayed 2.5.2.1Link LK1 Setting2-20 2.5.2DISPLAY BOARD 2-21 2.5.2.4 ‘Compatibility’ Setting 2.5.2.3‘Switching Threshold’ Setting2-22 2-23 2.6FAULT ANALYSIS & CORRECTIVE ACTION Analysis and Corrective Action Faults2-24 Indication 2-25 2-26 alternating between water and steam green and 2-27Bottom half of alternates State 5 contd 2-28Bottom half of 2-29 2.6.1.2Refitting the Input Board 2.6.1COMPONENT REPLACEMENT2-30 2.6.1.1Removing the Input Board 24680501 or Mobrey 2.6.2PARTS LIST - HYDRASTEP 2468 CB & CD VERSIONS2-31 Item Description 2-32 SPECIFICATION 2-WD.1 Wiring Diagrams for Dual Power Supply VersionPage No 2-WD.2 Wiring Diagrams for Dual Power Supply Version 2-WD.3 Wiring Diagrams for Dual Power Supply Version 2-WD.4 2-WD.5 2-WD.6 2-WD.7 2-WD.8 2-WD.9 Hydrastep 2468CB and 2468CD Manual 2-WD.10 2-WD.11 2-WD.12 2-WD.13 2-WD.14 2-WD.15 2-WD.16 3a-1 2468 - Relay Output Board Option 3a-7 3a-2 3A.1 GENERAL DESCRIPTION 3A.2 INSTALLATION3a-3 3a-4 3a.2.3.2 Relay Output Connections 3A.2.3 ELECTRICAL INSTALLATION3a-5 3a.2.3.1 PCB Interconnections 3a-6 3A.3 RELAY BOARD CONFIGURATION 3a-7 3a.3.1.1 Configuring the Relay Output Board3A.3.1 RELAY OUTPUT BOARD 3a-8 3a-9 3A.3.2 ALARM AND TRIPPING FACILITIES3a.3.2.1 Philosophy 3a-10 3a-11 3a-12 3a-13 3a-14 3a-15 3A.4 COMPONENT REPLACEMENT 3a-16 3A.5 SPECIFICATION 3b-1 Delay Relay Output Board Option 3b-2 SPECIFICATION3B.5 3B.1 GENERAL DESCRIPTION 3B.2 INSTALLATION3b-3 3b-4 3b.2.3.2 Relay Output Connections 3B.2.3 ELECTRICAL INSTALLATION3b-5 3b.2.3.1 PCB Interconnections 3b-6 3B.3 DELAY RELAY BOARD CONFIGURATION 3b-7 3b.3.1.1 Configuring the Delay Relay Output Board3B.3.1 DELAY RELAY OUTPUT BOARD 3b-8 3b-9 3b.3.1.6 Delay Circuit Configuration 3b-10 3b.3.1.7 Configuring the Delay Circuit Split Pads 3b.3.2.1 Philosophy 3b-11 3b-12 3b-13 3b-14 3b-15 3b-16 3b-17 3B.4 COMPONENT REPLACEMENT 3b-18 3B.5 SPECIFICATION 2468 Opto-isolatedOutput Board Option Tables Illustrations3c-2 3C.1 GENERAL DESCRIPTION 3C.2 INSTALLATION3c-3 3c-4 3c.2.3.2 Opto-IsolatedOutput Connections 3c-5 3c-6 3C.3 OPTO-ISOLATEDOUTPUT BOARD CONFIGURATION 3c-7 3c-8 3c-9 3C.3.2 ALARM AND TRIPPING FACILITIES3c.3.2.1 Philosophy 3c-10 3c-11 3c-12 3c-13 3c-14 3C.4 COMPONENT REPLACEMENT 3c-15 3C.5 SPECIFICATION 3c-16 Remote Display Options 24683B, C, & D Figure 4.1REMOTE DISPLAY OPTIONS 4.2CONFIGURATION 4.2.2RECONFIGURING THE 24683D REMOTE DISPLAY 4.3.2INSTALLING THE 24683D WALL MOUNTED UNIT 4.3MECHANICAL INSTALLATION comply with the EMC directive 4.4ELECTRICAL INSTALLATION Star 4.4.1STAR AND DAISY CHAIN CONNECTIONSDaisy Chain 4.4.2EXAMPLE OF A ‘STAR CONNECTED’ SYSTEM 4-10 4.4.3EXAMPLE OF A `DAISY CHAIN SYSTEM Terminal 4.4.4CONNECTING CABLES TO THE REMOTE DISPLAYService 4-11 4-12 4.4.5CONNECTING THE DISPLAY CABLES TO HYDRASTEP 4-13 4.6FAULT ANALYSIS AND CORRECTIVE ACTION4.5SYSTEM OPERATION Fault 4-14 Bottom half of fault Flickering Display 4-15 Mobrey Part Number 4.7COMPONENT REPLACEMENT4-16 Item REMOTE DISPLAY UNITS 4.8SPECIFICATIONDIMENSIONS POWER SUPPLY 4-18 Operating Manual Hydrastep Pressure Parts 24675030 Pt.2-2 Pt.2-3 Part 2 - Pressure Parts Pt.2-4 INCORRECT R E M I N D E RELECTRODE INSTALLATION CORRECT Pt.2-6 Pt.2-7 N O T I C E Pt.2-8 Fault Repair and Commissioning Part 2 - Hydrastep Pressure PartsInstallation Procedures Unit Specifications - Hydrastep Pt.2-10 24675030 General IntroductionPRINCIPLE OF OPERATION WATER LEVEL INDICATION Hydrastep Pressure Parts 24675030 1.2WATER LEVEL INDICATION 1.1PRINCIPLE OF OPERATION 24675030 General Introduction 24675030 STORAGE Installation ProceduresSCOPE OF PROCEDURES INSTALLATION OF WATER COLUMN Installation Procedures 2.2.4HANDLING PRECAUTIONS 2.1SCOPE OF PROCEDURES2.3INSTALLATION OF WATER COLUMN 2.2STORAGE discarded Figure 2.1 - Universal weld profile 2.4INSPECTION OF MECHANICAL INSTALLATION WORK 24675030 Figure 2.3 - Typical water column suspension BACKGROUND Fault Repair and CommissioningWATER COLUMN COMMISSIONING OR RECOMMISSIONING 24675030 3.1.1SAFETY PRECAUTIONS 3.1BACKGROUND 3.1.3ELECTRODE AND ELECTRODE SEAL LEAKS 3.1.2WATER COLUMN ISOLATION3.1.3.1Low Pressure Electrodes 3.1.3.2High Pressure Electrodes 3.2.1VENT AND DRAIN VALVE REPAIRS 3.2WATER COLUMN COMMISSIONING OR RECOMMISSIONING 3.2.3WATER COLUMN OR PIPEWORK BLOCKAGE 3.2.2WATER COLUMN TRANSIENT RESPONSE3.2.4WATER COLUMN LIFE 24675030 Unit Description Unit Description Figure 4.1 - Low pressure electrode 4.1LOW PRESSURE ELECTRODES Figure 4.2 - High pressure electrode 4.2HIGH PRESSURE ELECTRODES 4.3WATER COLUMN L.P 4.4WATER COLUMN H.P 4.5WATER COLUMN H.P. SUPERCRITICAL Hydrastep Pressure Parts 5.1ELECTRODES Unit Specifications - Hydrastep Series 5.2WATER COLUMNSSuper Pt.3-1 PartHydrastep 2468CA, CB, CC & CD Electronic Gauging System Pt3-2 A.1 GENERAL CSA Certified Hydrastep 2468 - Technical Manual Page Appendix A CSA Approval Page Operating Manual Hydrastep