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Chapter 3 ________________________________________________________________ Installation
VAISALA ________________________________________________________________________ 57
RS-422/485 Interface
The RS-422/485 interface enables communication between an RS-485
network and the PTU300 transmitter. The RS-485 interface is isolated
and offers a maximum communications rate of 115 200 bits/s. (For
maximum bus length of 1 km, use bit rate 19200 b/s or less.)
When selecting an RS-232 to RS-485 converter for the network, avoid
self-powered converters, as they do not necessarily support the needed
power consumption.
NOTE
RS
-232 User Port on PTU300 main board cannot be used and connected
when RS
-485 module is connected. Service port operates normally.
1102-023
Figure 32 RS-485 Module
The following numbers refer to Figure 32 above:
1
=
Flat cable pins
2
=
Selection switches
3
=
Screw terminals for wiring
NOTE
The data lines on earlier versions of the RS
-422/485 module are marked
A and B instead of D1+ and D0
-. When the line is idle, D1+ has positive
voltage compared to D0
-.
When connecting the module, be prepared to swap the D1+ and D0
-
wires if you have a communication problem.
1
2
3
- USER'S GUIDE 1
- Table of Contents 3
- CHAPTER 4 4
- CHAPTER 6 7
- CHAPTER 7 7
- CHAPTER 8 8
- APPENDIX A 9
- APPENDIX B 9
- APPENDIX C 9
- List of Figures 10
- List of Tables 12
- GENERAL INFORMATION 15
- Version Information 16
- Related Manuals 16
- Documentation Conventions 16
- ESD Protection 17
- Recycling 18
- Regulatory Compliances 18
- DNV Type Approval 19
- Patent Notice 20
- Trademarks 20
- Software License 21
- Warranty 21
- PRODUCT OVERVIEW 23
- Basic Features and Options 25
- Structure of the Transmitter 26
- 0604-060 27
- Probe Options 28
- 0911-067 29
- Warmed Probe PTU307 30
- INSTALLATION 31
- 133 (5.24) 32
- 59 (2.32) 32
- Thickness 32
- 9.5 (0.37) 32
- 0911-061 33
- Pole or Pipeline 34
- 0503-007 35
- 0503-041 35
- 0509-151 36
- 0503-008 36
- Panel Mounting Frame 37
- 0804-083 38
- Cable Bushings 39
- Grounding the Cables 40
- Alternate Wiring Systems 41
- WARNING 42
- 8-Pin Connector 43
- D-9 Connector 44
- CAUTION 45
- Probe Mounting 46
- 0507-024 47
- 0507-022 47
- PTU303 for General Use 48
- PTU307 for High Humidities 49
- Temperature Probe (Optional) 49
- Optional Modules 50
- Installation 51
- Warnings 52
- Third Analog Output 55
- Installation and Wiring 56
- RS-422/485 Interface 59
- Figure 33 4-Wire RS-485 Bus 61
- 1102-027 62
- LAN Interface 63
- WLAN Interface 64
- 0706-068 66
- OPERATION 67
- Display/Keypad (Optional) 68
- Reading 69
- 0604-055 70
- Missing Trend 71
- Graphic History 72
- 0706-030 73
- Information Display 74
- Menus and Navigation 75
- Rounding Setting 76
- Display Backlight Setting 76
- Display Contrast Setting 76
- Keypad Lock (Keyguard) 77
- Menu PIN Lock 77
- Configuring Display Alarms 78
- 0802-069 80
- 0802-070 80
- Serial Line Communication 83
- Service Port Connection 84
- Using the Service Port 85
- LAN Communication 86
- Wireless LAN Configuration 89
- Communication Protocol 92
- Terminal Program Settings 93
- 0810-070 94
- 0810-071 95
- List of Serial Commands 96
- Table 27 Pressure Commands 98
- Table 28 GPS Commands 98
- Table 29 Other Commands 98
- Serial Line 99
- FTIME and FDATE 102
- General Settings 103
- Limit RH Output Range 107
- Date and Time 108
- NMEA Data Format 109
- GPS Commands 110
- Using Display/Keypad 111
- Using Serial Line 112
- Data Filtering for Pressure 114
- Temperature 115
- Device Information 117
- Serial Output Settings 121
- Data Recording 125
- Deleting the Recorded Files 128
- Analog Output Settings 129
- Analog Output Quantities 130
- AMODE/ASEL 131
- Analog Output Tests 132
- Operation of Relays 134
- 1102-007 135
- Hysteresis 136
- 1102-040 137
- Enabling/Disabling Relays 139
- Setting Relay Outputs 139
- Testing Operation Of Relays 142
- Sensor Functions 143
- Manual Chemical Purge 144
- Chemical Purge in Power Up 144
- Using Buttons On Motherboard 144
- Setting Sensor Heating 147
- Display/Keypad 148
- CHAPTER 5 149
- Taking Modbus into Use 150
- Enabling Serial Modbus 151
- Enabling Ethernet Modbus 152
- 1101-034 153
- 1101-036 153
- Diagnostic Modbus Counters 155
- Disabling Modbus 156
- MAINTENANCE 157
- Changing the Sensor 158
- Error States 159
- Table 36 Error Messages 160
- Technical Support 161
- Product Returns 161
- CALIBRATION AND ADJUSTMENT 163
- 0508-013 164
- Pressure Adjustment 165
- Example: 168
- Relative Humidity Adjustment 169
- Temperature Adjustment 177
- TECHNICAL DATA 181
- Relative Humidity 182
- Optional Temperature Probe 183
- Calculated Variables 184
- 1013 mbar) 185
- Probe Option) 186
- Inputs and Outputs 187
- Mechanics 188
- Modules 189
- RS-485 Module 190
- LAN Interface Module 190
- WLAN Interface Module 190
- Data Logger Module 190
- Spare Parts and Accessories 191
- 27.5 (1.08) 193
- 116 (4.57) 194
- 183 (7.20) 194
- 92 (3.62) 194
- 12 (0.47) 194
- 120 (4.72) 194
- 106 (4.17) 195
- 42 (1.65) 195
- Temperature Probe 196
- PROBE INSTALLATION KITS AND 197
- INSTALLATION EXAMPLES 197
- PTU307) 198
- 0508-032 199
- 0508-016 200
- Cable Gland 201
- 0508-018 202
- 0508-015 203
- 0508-022 203
- 0601-044 204
- CALCULATION FORMULAS 205
- 99.621 ×= 206
- MODBUS REFERENCE 209
- Register Map 210
- 16-Bit Integer Format 211
- Measurement Data (Read-Only) 212
- Status Registers (Read-Only) 213
- Configuration Registers 213
- Exception Status Outputs 214
- Diagnostic Sub-Functions 215
- Exception Responses 216
- *M210796EN* 217
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