Emerson 2468CD User Manual Page 113
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Hydrastep 2468CB & 2468CD Manual Opto-isolated Output Board Option
24685034
3c-11
3c.3.2.4 ‘Two out of Two’ Opto-output Alarm System
This system requires both opto-outputs to operate to cause an alarm when their assigned
electrodes register an alarm condition.
Case A - Opto-output circuit normally open circuit, short circuit both to trip
TR2
(Switch SW5 is set to S for low level alarms and set to W for high level alarms)
Opto-output 1
TR2
Opto-output 1
+ VE - VE
Even Electrodes
(LH Input Board)
Note: External power must
be applied as shown.
See specification for
power requirements
Odd Electrodes
(RH Input Board)
1
4
3
2
PL 2
1
4
3
2
PL 2
To alarm annunciator or
tripping device
Case B - Opto-output circuit normally short circuit, open circuit both to trip
TR2
(Switch SW5 is set to W for low level alarms and set to S for high level alarms)
Opto-output 1
TR2
Opto-output 1
+ VE - VE
Even Electrodes
(LH Input Board)
Note: External power must
be applied as shown.
See specification for
power requirements
Odd Electrodes
(RH Input Board)
1
4
3
2
PL 2
1
4
3
2
PL 2
To alarm annunciator or
tripping device
- Hydrastep 2468CB and 2468CD 1
- HYDRASTEP START-UP 3
- 24685034 Pt.1-1 7
- Pt.1-2 24685034 8
- 24685034 Pt.1-3 9
- Pt.1-4 24685034 10
- Part 1 11
- Pt.1-6 24685034 12
- Electronic Gauging System 13
- 1-2 24685034 14
- 1.1 WATER LEVEL MEASUREMENT 15
- 1-4 24685034 16
- 1.3 SYSTEM OPTIONS 18
- OPTIONS 19
- 1-8 24685034 20
- 2468CB & 2468CD 21
- Dual Power Supply Version 21
- 2-2 24685034 22
- 2.1 INTRODUCTION 23
- 2.3 ELECTRONIC ENCLOSURE 23
- 2-4 24685034 24
- 24685034 2-5 25
- 2-6 24685034 26
- 24685034 2-7 27
- 2.4 INSTALLATION 28
- 24685034 2-9 29
- 2-10 24685034 30
- 2-11 31
- 2-12 24685034 32
- 2-13 33
- 2-14 24685034 34
- 2-15 35
- 2-16 24685034 36
- 2.5 SYSTEM CONFIGURATION 37
- 2-18 24685034 38
- 2-19 39
- 2-20 24685034 40
- 2-21 41
- 2-22 24685034 42
- 2-23 43
- Electrode or Wiring fault 43
- 2-24 24685034 44
- 2-25 45
- 2-26 24685034 46
- 2-27 47
- 2-28 24685034 48
- 2-29 49
- 2-30 24685034 50
- 2-31 51
- 2.7 SPECIFICATION 52
- Wiring Diagrams for 53
- 2 24685034 54
- 2-WD.3 55
- 4 24685034 56
- 2-WD.5 57
- 6 24685034 58
- 2-WD.7 59
- 8 24685034 60
- 2-WD.9 61
- 10 24685034 62
- 2-WD.11 63
- 12 24685034 64
- 2-WD.13 65
- 14 24685034 66
- 2-WD.15 67
- 16 24685034 68
- 3a-2 24685034 70
- 3A.1 GENERAL DESCRIPTION 71
- 3A.2 INSTALLATION 71
- 3a-4 24685034 72
- 3a-5 73
- 3a-6 24685034 74
- 3a-7 75
- 3a-8 24685034 76
- 3a-9 77
- 3a-10 24685034 78
- 3a-11 79
- 3a-12 24685034 80
- 3a-13 81
- 3a-14 24685034 82
- 3A.4 COMPONENT REPLACEMENT 83
- 3A.5 SPECIFICATION 84
- 3b-2 24685034 86
- 3B.1 GENERAL DESCRIPTION 87
- 3B.2 INSTALLATION 87
- 3b-4 24685034 88
- 3b-6 24685034 90
- 3b-8 24685034 92
- 3b-10 24685034 94
- 3b-11 95
- 3b-12 24685034 96
- 3b-13 97
- 3b-14 24685034 98
- 3b-15 99
- 3b-16 24685034 100
- 3B.4 COMPONENT REPLACEMENT 101
- 3B.5 SPECIFICATION 102
- Contents 103
- Illustrations 104
- 3C.1 GENERAL DESCRIPTION 105
- 3C.2 INSTALLATION 105
- 3c-4 24685034 106
- 24685034 107
- 3c-6 24685034 108
- 3c-8 24685034 110
- 3c-10 24685034 112
- 3c-11 113
- 3c-12 24685034 114
- 3c-13 115
- 3C.4 COMPONENT REPLACEMENT 116
- 3C.5 SPECIFICATION 117
- 3c-16 24685034 118
- 4.1 REMOTE DISPLAY OPTIONS 121
- 4.2 CONFIGURATION 122
- 24685034 4-5 123
- 4.3 MECHANICAL INSTALLATION 124
- 4.4 ELECTRICAL INSTALLATION 125
- 24685034 4-9 127
- 4.5 SYSTEM OPERATION 131
- 24685034 4-15 133
- 4.7 COMPONENT REPLACEMENT 134
- 4.8 SPECIFICATION 135
- Hydrastep Pressure Parts 137
- Pt.2-2 24675030 138
- About this manual 139
- Pt.2-4 24675030 140
- ELECTRODE INSTALLATION 141
- Pt.2-6 24675030 142
- N O T I C E 143
- Pt.2-8 24675030 144
- Pt.2-9 145
- Pt.2-10 24675030 146
- General Introduction 147
- 1-2 24675030 148
- 1.1 PRINCIPLE OF OPERATION 149
- 1.2 WATER LEVEL INDICATION 149
- 1-4 24675030 150
- 24675030 151
- 1-6 24675030 152
- Installation Procedures 153
- 2-2 24675030 154
- 2.1 SCOPE OF PROCEDURES 155
- 2.2 STORAGE 155
- 2-4 24675030 156
- 2-6 24675030 158
- 2-8 24675030 160
- 3-2 24675030 162
- 3.1 BACKGROUND 163
- 3-4 24675030 164
- AND GASKETS 165
- 3-6 24675030 166
- 3.2.4 WATER COLUMN LIFE 167
- 3-8 24675030 168
- Unit Description 169
- 4-2 24675030 170
- 4.1 LOW PRESSURE ELECTRODES 171
- 4.2 HIGH PRESSURE ELECTRODES 172
- 4.3 WATER COLUMN (L.P.) 173
- 4.4 WATER COLUMN (H.P.) 174
- 24675030 4-7 175
- 4-8 24675030 176
- 5.1 ELECTRODES 177
- 5.2 WATER COLUMNS 178
- Pt3-2 180
- CSA Certified 181
- Hydrastep 2468 186
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