4.4.1STAR AND DAISY CHAIN CONNECTIONS, Star | Emerson 2468CB

4.4.1STAR AND DAISY CHAIN CONNECTIONS

Remote Display Options 24683B, C & D

Hydrastep 2468CB & 2468CD Manual

4.4.1STAR AND DAISY CHAIN CONNECTIONS

Multiple remote display units can be connected to the main 2468 unit in two ways: ‘star’ or ‘daisy chain’. (See Figure 4.3) You can use either or both of these, in whichever way best suits the relative locations of the 2468 unit and the remote displays. The maximum cable length permitted between the 2468 and any remote unit is 1000 metres.

2468

RDU 1

RDU 6

RDU 2

Star

RDU 5

RDU 3

RDU 4

2468

	RDU 1					RDU 2
	RDU 1					RDU 2

Daisy

Chain

RDU 3

RDU 4

RDU 5

RDU 6

Figure 4.3 - Star and daisy chain connections of remote displays

4-8

24685034

Image 126

Emerson 2468CB, 2468CD manual 4.4.1STAR AND DAISY CHAIN CONNECTIONS, Star, Daisy Chain

Contents

Electronic Gauging System Hydrastep 2468CB and 2468CDHydrastep Dual Power Supply Version CATEGORY SYMPTOMSOLUTION See Note POSSIBLE CAUSES See Note HYDRASTEP START-UP Mobrey Customer Support Part 2 – Pressure Parts About this manualPart 1 – Electrical/Electronic System Part 3 – Appendix SYMBOLS USED IN THIS MANUAL AND ON THE UNIT Symbol MeaningPage Electronic Gauging System PartHydrastep 2468CB & 2468CD 24685034 Pt.1-2 DANGEROUS VOLTAGES ARE PRESENT IN Pt.1-4 Contents Part Pt.1-6 Page No ContentsIllustrations Tables 0040 1.1WATER LEVEL MEASUREMENT Hydrastep 2468CB and 2468CD Manual 1.2HYDRASTEP 2468 ELECTRONIC GAUGING SYSTEM 1.2.1INPUT BOARDS1.2.2DISPLAY BOARD 1.3.1OUTPUT BOARDS 1.3SYSTEM OPTIONS1.2.3SYSTEM FAULTS 2468CB OR 2468CD 1.3.2REMOTE DISPLAY UNITS Available Options Table 1.1 - Upgrade paths and available optionsExisting System Comments Hydrastep 2468CB and 2468CD Manual 2468CB & 2468CD Dual Power Supply Version 2-23 FAULT ANALYSIS & CORRECTIVE ACTIONSPECIFICATION 2-32 2.3ELECTRONIC ENCLOSURE 2.1INTRODUCTION2.2ELECTRODE CABLING SYSTEM Number of 2468CB & 2468CD Dual Power Supply Version 2.3.1INPUT BOARD PCB 24680501 AND PCB 2.3.1.1Analogue Output Drive Capability2.3.2REMOTE DISPLAY DRIVE CAPABILITY 2.3.3DISPLAY BOARD PCB 2.3.3.1Link LK1 Link Headers fitted 2.3.3.2Links LK2, LK3, LK4 and LK5No. of Electrodes used 2.3.4PCB INTERCONNECTIONS 2.4INSTALLATION Hydrastep 2468CB and 2468CD Manual 2-10 Electrode connections Conductor 2-11Water column connections for 16 electrodes Number 2.4.2.3Connecting the Electrode Cable Assemblies to 2468 Enclosure 2-12 AC Powered Units input board 2.4.2.4Hydrastep Power Supply Cables2-13 DC Powered Units input board 2-14Figure 2.4 Voltage Selection 240V or 2-15 2.4.2.5Analogue Output Connection 2.4.2.6Opto-IsolatedFault Output Connection 2-16Part of Display Board showing PL4 2-17 2.5SYSTEM CONFIGURATION2.5.1.1Analogue Output Configuration 2.5.1INPUT BOARD PCB 24680501 OR 2-18 2.5.1.2Pulsed Output Setting2.5.1.3Electrode Error Configuration Input Board Option Board Removed 2-19 Offset voltages 2.5.2DISPLAY BOARD 2.5.2.1Link LK1 Setting2-20 Table 2.2 - Number of electrodes being displayed 2-21 2.5.2.3‘Switching Threshold’ Setting 2.5.2.4 ‘Compatibility’ Setting2-22 2.6FAULT ANALYSIS & CORRECTIVE ACTION 2-23 Indication Faults2-24 Analysis and Corrective Action 2-25 2-26 alternates 2-27Bottom half of alternating between water and steam green and 2-28 State 5 contdBottom half of 2-29 2.6.1.1Removing the Input Board 24680501 or 2.6.1COMPONENT REPLACEMENT2-30 2.6.1.2Refitting the Input Board Item Description 2.6.2PARTS LIST - HYDRASTEP 2468 CB & CD VERSIONS2-31 Mobrey SPECIFICATION 2-32 Wiring Diagrams for Dual Power Supply Version 2-WD.1Page No Wiring Diagrams for Dual Power Supply Version 2-WD.2 Wiring Diagrams for Dual Power Supply Version 2-WD.3 2-WD.4 2-WD.5 2-WD.6 2-WD.7 2-WD.8 2-WD.9 2-WD.10 Hydrastep 2468CB and 2468CD Manual 2-WD.11 2-WD.12 2-WD.13 2-WD.14 2-WD.15 2-WD.16 2468 - Relay Output Board Option 3a-1 3a-2 3a-7 3A.2 INSTALLATION 3A.1 GENERAL DESCRIPTION3a-3 3a-4 3a.2.3.1 PCB Interconnections 3A.2.3 ELECTRICAL INSTALLATION3a-5 3a.2.3.2 Relay Output Connections 3A.3 RELAY BOARD CONFIGURATION 3a-6 3a.3.1.1 Configuring the Relay Output Board 3a-73A.3.1 RELAY OUTPUT BOARD 3a-8 3A.3.2 ALARM AND TRIPPING FACILITIES 3a-93a.3.2.1 Philosophy 3a-10 3a-11 3a-12 3a-13 3a-14 3A.4 COMPONENT REPLACEMENT 3a-15 3A.5 SPECIFICATION 3a-16 Delay Relay Output Board Option 3b-1 SPECIFICATION 3b-23B.5 3B.2 INSTALLATION 3B.1 GENERAL DESCRIPTION3b-3 3b-4 3b.2.3.1 PCB Interconnections 3B.2.3 ELECTRICAL INSTALLATION3b-5 3b.2.3.2 Relay Output Connections 3B.3 DELAY RELAY BOARD CONFIGURATION 3b-6 3b.3.1.1 Configuring the Delay Relay Output Board 3b-73B.3.1 DELAY RELAY OUTPUT BOARD 3b-8 3b.3.1.6 Delay Circuit Configuration 3b-9 3b.3.1.7 Configuring the Delay Circuit Split Pads 3b-10 3b-11 3b.3.2.1 Philosophy 3b-12 3b-13 3b-14 3b-15 3b-16 3B.4 COMPONENT REPLACEMENT 3b-17 3B.5 SPECIFICATION 3b-18 2468 Opto-isolatedOutput Board Option Illustrations Tables3c-2 3C.2 INSTALLATION 3C.1 GENERAL DESCRIPTION3c-3 3c-4 3c-5 3c.2.3.2 Opto-IsolatedOutput Connections 3C.3 OPTO-ISOLATEDOUTPUT BOARD CONFIGURATION 3c-6 3c-7 3c-8 3C.3.2 ALARM AND TRIPPING FACILITIES 3c-93c.3.2.1 Philosophy 3c-10 3c-11 3c-12 3c-13 3C.4 COMPONENT REPLACEMENT 3c-14 3C.5 SPECIFICATION 3c-15 3c-16 Remote Display Options 24683B, C, & D Figure 4.1REMOTE DISPLAY OPTIONS 4.2CONFIGURATION 4.2.2RECONFIGURING THE 24683D REMOTE DISPLAY 4.3MECHANICAL INSTALLATION 4.3.2INSTALLING THE 24683D WALL MOUNTED UNIT 4.4ELECTRICAL INSTALLATION comply with the EMC directive 4.4.1STAR AND DAISY CHAIN CONNECTIONS StarDaisy Chain 4.4.2EXAMPLE OF A ‘STAR CONNECTED’ SYSTEM 4.4.3EXAMPLE OF A `DAISY CHAIN SYSTEM 4-10 4-11 4.4.4CONNECTING CABLES TO THE REMOTE DISPLAYService Terminal 4.4.5CONNECTING THE DISPLAY CABLES TO HYDRASTEP 4-12 Fault 4.6FAULT ANALYSIS AND CORRECTIVE ACTION4.5SYSTEM OPERATION 4-13 Bottom half of fault 4-14 4-15 Flickering Display Item 4.7COMPONENT REPLACEMENT4-16 Mobrey Part Number POWER SUPPLY 4.8SPECIFICATIONDIMENSIONS REMOTE DISPLAY UNITS 4-18 Hydrastep Pressure Parts Operating Manual Pt.2-2 24675030 Part 2 - Pressure Parts Pt.2-3 Pt.2-4 CORRECT R E M I N D E RELECTRODE INSTALLATION INCORRECT Pt.2-6 N O T I C E Pt.2-7 Pt.2-8 Unit Specifications - Hydrastep Part 2 - Hydrastep Pressure PartsInstallation Procedures Fault Repair and Commissioning Pt.2-10 WATER LEVEL INDICATION General IntroductionPRINCIPLE OF OPERATION 24675030 24675030 Hydrastep Pressure Parts 1.1PRINCIPLE OF OPERATION 1.2WATER LEVEL INDICATION General Introduction General Introduction General Introduction INSTALLATION OF WATER COLUMN Installation ProceduresSCOPE OF PROCEDURES STORAGE Installation Procedures 2.2STORAGE 2.1SCOPE OF PROCEDURES2.3INSTALLATION OF WATER COLUMN 2.2.4HANDLING PRECAUTIONS discarded Figure 2.1 - Universal weld profile 2.4INSPECTION OF MECHANICAL INSTALLATION WORK Installation Procedures Figure 2.3 - Typical water column suspension Fault Repair and Commissioning BACKGROUNDWATER COLUMN COMMISSIONING OR RECOMMISSIONING Fault Repair and Commissioning 3.1BACKGROUND 3.1.1SAFETY PRECAUTIONS 3.1.2WATER COLUMN ISOLATION 3.1.3ELECTRODE AND ELECTRODE SEAL LEAKS3.1.3.1Low Pressure Electrodes 3.1.3.2High Pressure Electrodes 3.2WATER COLUMN COMMISSIONING OR RECOMMISSIONING 3.2.1VENT AND DRAIN VALVE REPAIRS 3.2.2WATER COLUMN TRANSIENT RESPONSE 3.2.3WATER COLUMN OR PIPEWORK BLOCKAGE3.2.4WATER COLUMN LIFE Fault Repair and Commissioning Unit Description Unit Description 4.1LOW PRESSURE ELECTRODES Figure 4.1 - Low pressure electrode 4.2HIGH PRESSURE ELECTRODES Figure 4.2 - High pressure electrode 4.3WATER COLUMN L.P 4.4WATER COLUMN H.P 4.5WATER COLUMN H.P. SUPERCRITICAL Unit Description Unit Specifications - Hydrastep 5.1ELECTRODES 5.2WATER COLUMNS SeriesSuper Electronic Gauging System PartHydrastep 2468CA, CB, CC & CD Pt.3-1 Pt3-2 CSA Certified A.1 GENERAL Hydrastep 2468 - Technical Manual Page Appendix A CSA Approval Page Hydrastep Operating Manual