4.8SPECIFICATION, Remote Display Units, Cables | Emerson 2468CD

Hydrastep 2468CB & 2468CD Manual

Remote Display Options 24683B, C & D

4.8SPECIFICATION

REMOTE DISPLAY UNITS

INDICATION	Red/green 6mm×3mm LEDs
CASE STYLE	24683B and 24683C: Panel mounting;
	24683D: Rugged enclosure, to IP65/NEMA 4X
DIMENSIONS	24683B: 144mm×72mm×200mm deep (5.67”×2.83” ×7.87”)
	24683C: 192mm×96mm×209mm deep (7.56”×3.7” ×8.23”)
	24683D: 302mm×186mm×175mm deep (11.89”×7.32” ×6.89”)
PANEL CUT-OUT	24683B: 139mm×67mm
	24683C: 186mm×92mm (7.32”×3.62”)
POWER SUPPLY	Derived from 2468 electronics unit or 20V - 54Vdc, 240mA
	Absolute maximum limits at remote display terminals: 16V to 60Vdc
TERMINALS	Screw-clamp

CABLES

Note: The following cables fulfil the minimum requirements. Heavier cables may be used. Maximum gauge accepted by connectors is 16AWG (1. 5mm2).

Powered from 2468 electronics	1.5mm2, 7×0.53mm individually shielded, 5-pair. Overall
(up to 1000m from 2468 unit)	shield. Galvanised steel wire armour. One cable
BASEEFA conformity*	required. (Mobrey Part No.480121230)
Unit locally powered	22	AWG (0.324mm2, 7×0.25mm) individually shielded, 2-pair
(up to 1000m from main unit)	twisted (Belden type No. 8723). Two cables required.
	22	AWG (0.324mm2, 7×0.25mm) individually shielded, 3-pair
	twisted (Belden type No. 8777). One cable required.

Powered from 2468 electronics	22	AWG (0.324mm2, 7×0.25mm) individually shielded, 2-pair
(up to 250m from 2468 unit)	twisted (Belden type No. 8723). Two cables required.
	22	AWG (0.324mm2, 7×0.25mm) individually shielded, 4-pair
	twisted (Alpha Wire type No. 6054C). One cable required.

Powered from 2468 electronics	22	AWG (0.324mm2, 7×0.25mm) individually shielded, 3-pair
(up to 500m from 2468 unit)	twisted (Belden type No. 8777). Two cables required.
	22	AWG (0.324mm2, 7×0.25mm) individually shielded, 6-pair
	twisted (Belden type No. 8778). One cable required.

Powered from 2468 electronics	18	AWG (0.826mm2, 16×0.25mm) individually shielded, 3-pair
(up to 1000m from 2468 unit)	twisted (Belden type No. 9773). Two cables required.
	22	AWG (0.826mm2, 16×0.25mm) individually shielded, 6-pair
	twisted (Belden type No. 9774). One cable required.

*The main Hydrastep 2468 unit is approved for operation in a hazardous environment to EExnA T4. Compliance with this approval requires that armoured cable is used to connect a remote display to the main unit. A remote display must not be used in a hazardous environment.

24685034

4-17

Image 135

Emerson 2468CD 4.8SPECIFICATION, Remote Display Units, Cables, 4-17, Indication, Case Style, Dimensions, Panel Cut-Out

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 1.2HYDRASTEP 2468 ELECTRONIC GAUGING SYSTEM 1.2.1INPUT BOARDS1.2.2DISPLAY 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 2.3.1INPUT BOARD PCB 24680501 AND PCB 2.3.1.1Analogue Output Drive Capability2.3.2REMOTE 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 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 2.4.2.5Analogue Output Connection 2-15 2.4.2.6Opto-IsolatedFault Output Connection 2-16Part 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 2.5.2.3‘Switching Threshold’ Setting 2.5.2.4 ‘Compatibility’ 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 2-28 State 5 contdBottom 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 Wiring Diagrams for Dual Power Supply Version 2-WD.1Page 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.2 INSTALLATION 3A.1 GENERAL DESCRIPTION3a-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.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-15 3A.4 COMPONENT REPLACEMENT 3a-16 3A.5 SPECIFICATION 3b-1 Delay Relay Output Board Option SPECIFICATION 3b-23B.5 3B.2 INSTALLATION 3B.1 GENERAL DESCRIPTION3b-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.3.1.1 Configuring the Delay Relay Output Board 3b-73B.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 Illustrations Tables3c-2 3C.2 INSTALLATION 3C.1 GENERAL DESCRIPTION3c-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.3.2 ALARM AND TRIPPING FACILITIES 3c-93c.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 4.4.1STAR AND DAISY CHAIN CONNECTIONS StarDaisy 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 General Introduction 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 Fault Repair and Commissioning BACKGROUNDWATER COLUMN COMMISSIONING OR RECOMMISSIONING Fault Repair and Commissioning 3.1.1SAFETY PRECAUTIONS 3.1BACKGROUND 3.1.2WATER COLUMN ISOLATION 3.1.3ELECTRODE AND ELECTRODE SEAL LEAKS3.1.3.1Low Pressure Electrodes 3.1.3.2High Pressure Electrodes 3.2.1VENT AND DRAIN VALVE REPAIRS 3.2WATER COLUMN COMMISSIONING OR RECOMMISSIONING 3.2.2WATER COLUMN TRANSIENT RESPONSE 3.2.3WATER COLUMN OR PIPEWORK BLOCKAGE3.2.4WATER COLUMN LIFE Fault Repair and Commissioning 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 Unit Description 5.1ELECTRODES Unit Specifications - Hydrastep 5.2WATER COLUMNS SeriesSuper 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