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Chapter 3 ________________________________________________________________ Installation
VAISALA ________________________________________________________________________ 59
1102-028
Figure 34 4-Wire RS-485 Bus
Table 7 4-Wire (Switch 3: On)
RS-485 master
Data
MMT330
Tx D1+
→
Rx D1+
Tx D0-
→
Rx D0-
Rx D1+
←
Tx D1+
Rx D0-
←
Tx D0-
Stub
Termination Termination
Termination Termination
Twisted pair
120R
120R
120R
120R
Twisted pair
Stub
Stub
Baud > 19.2K Stub < 10ft, 3m
Baud > 112K Stub < 1ft, 0.3m
Rx D0-
Rx D1+
Common
Tx D0-
Tx D1+
Switch
Term off
Term off
2/4 wire on
RS422 off
Tx D0-
Tx D1+
Common
Rx D0-
Rx D1+
Switch
Term off
Term off
2/4 wire on
RS422 off
Tx D0-
Tx D1+
Common
Rx D0-
Rx D1+
RS485-1
RS485-1
Address MM
Address NN
RS485 bus master
Junction
box
Junction
box
Junction
box
Common
line
Common
line
- USER'S GUIDE 1
- Table of Contents 3
- CHAPTER 4 4
- CHAPTER 6 6
- CHAPTER 7 7
- CHAPTER 8 7
- CHAPTER 9 7
- APPENDIX A 8
- List of Figures 9
- List of Tables 11
- GENERAL INFORMATION 13
- Version Information 14
- Documentation Conventions 14
- ESD Protection 15
- Recycling 16
- Regulatory Compliances 16
- DNV Type Approval 17
- Patent Notice 19
- Trademarks 19
- Software License 19
- Warranty 19
- PRODUCT OVERVIEW 21
- Basic Features and Options 22
- Structure of the Transmitter 22
- 0604-006 23
- Probe Options 24
- Typical Applications 25
- Transformer Oil 26
- 0510-029 27
- INSTALLATION 29
- 59 (2.32) 30
- Thickness 30
- 9.5 (0.37) 30
- 133 (5.24) 30
- Pole or Pipeline 31
- 0503-007 32
- 0503-041 32
- 0509-051 33
- 0503-008 33
- Panel Mounting Frame 34
- Cable Bushings 35
- Grounding the Cables 36
- WARNING 38
- CAUTION 40
- 0510-030 41
- 0509-144 42
- 0509-150 42
- 0510-028 44
- Tightening the Clasp Nut 45
- 0507-043 47
- Sampling Cell for MMT338 49
- Optional Modules 50
- Installation 51
- Warnings 52
- Third Analog Output 55
- Installation and Wiring 56
- RS-422/485 Interface 58
- Figure 34 4-Wire RS-485 Bus 61
- 1102-027 62
- LAN Interface 63
- WLAN Interface 64
- Data Logger Module 65
- 0706-068 66
- 8-Pin Connector 67
- OPERATION 69
- Graphic History 70
- 0706-030 71
- Menus and Navigation 72
- Changing the Language 73
- Rounding Setting 73
- Display Backlight Setting 73
- Display Contrast Setting 74
- Keypad Lock (Keyguard) 74
- Menu PIN Lock 75
- Factory Settings 75
- Display Alarms 76
- Configuring a Display Alarm 77
- Table 13 ALSEL Parameters 79
- Serial Line Communication 81
- User Port Connection 82
- Service Port Connection 83
- LAN Communication 84
- IP Configuration 85
- Wireless LAN Configuration 88
- Communication Protocol 91
- Terminal Program Settings 92
- 0810-070 93
- 0810-071 94
- List of Serial Commands 95
- Serial Line 97
- Outputting Reading Once 98
- FTIME and FDATE 100
- General Settings 101
- Using Serial Line 102
- Date and Time 104
- Data Filtering 105
- Device Information 106
- Serial Output Settings 110
- Data Recording 113
- View Recorded Data 114
- Deleting the Recorded Files 117
- Analog Output Settings 118
- Analog Output Quantities 119
- AMODE/ASEL 120
- Analog Output Tests 121
- Operation of Relays 123
- 1102-007 124
- Hysteresis 125
- 1102-040 126
- Enabling/Disabling Relays 127
- Setting Relay Outputs 127
- 0509-142 128
- Testing Operation of Relays 131
- CHAPTER 5 133
- Taking Modbus into Use 134
- Enabling Serial Modbus 135
- Enabling Ethernet Modbus 136
- 1101-034 137
- 1101-036 137
- Diagnostic Modbus Counters 139
- Disabling Modbus 140
- 10xawppm = 141
- (A/(T+273.16)+B) 141
- (B+A/T) 143
- A/T1 - 1TPPMLOGB 144
- MAINTENANCE 145
- Changing the Sensor 146
- Error States 147
- Table 30 Error Messages 148
- Technical Support 149
- Product Returns 149
- CALIBRATION AND ADJUSTMENT 151
- Cleaning the Sensor 152
- Relative Humidity Adjustment 153
- Using Display/Keypad 154
- Temperature Adjustment 157
- Analog Output Adjustment 159
- TECHNICAL DATA 161
- Operating Environment 162
- Probe Specifications 162
- Inputs and Outputs 163
- Mechanics 163
- Modules 164
- Relay Module 165
- RS-485 Module 165
- LAN Interface Module 165
- WLAN Interface Module 165
- Spare Parts and Accessories 166
- CABLE BUSHINGS 167
- WINDOWS SOFTWARE 167
- Dimensions (mm/inch) 168
- 92 (3.62) 169
- 116 (4.57) 169
- 183 (7.20) 169
- 0509-149 170
- 0509-146 170
- MMT338 171
- MODBUS REFERENCE 173
- Register Map 174
- 16-Bit Integer Format 175
- Measurement Data (Read-Only) 176
- Status Registers (Read-Only) 176
- Exception Status Outputs 177
- Diagnostic Sub-Functions 178
- Exception Responses 179
- *M210733EN* 181
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