Vaisala BAROCAP PTB330 Guía de usuario Pagina 46
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USER'S GUIDE____________________________________________________________________
44 __________________________________________________________________ M210855EN-D
NOTE
If you use the internal termination of the barometer at the end of the
RS-485 bus (instead of using separate terminators) removing that
barometer may block the bus operation.
Table 5 Connecting the Twisted Pair Wires to the Screw
Terminals
Screw terminal Data line (2-wire RS-485) Data line
(4-wire RS-485/422)
1 (not connected) RxD0-
2 (not connected) RxD1+
3 Shield/Common Wire Shield/Common Wire
4 D0- TxD0-
5 D1+ TxD1+
Stub
Termination Termination
Termination Termination
Junction box
Junction box
Junction box
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
2/4wireon
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+
5
4
3
2
1
RS485-1
RS485-1
Address MM
Address NN
RS485 bus master
5
4
3
2
1
1102-028
Figure 26 4-Wire RS-485 Bus
- USER'S GUIDE 1
- Table of Contents 3
- CHAPTER 4 4
- List of Figures 8
- List of Tables 9
- GENERAL INFORMATION 11
- ESD Protection 13
- Recycling 14
- Trademarks 14
- License Agreement 14
- Warranty 14
- PRODUCT OVERVIEW 15
- Basic Features and Options 16
- Pressure Measurement 16
- INSTALLATION 19
- Kit for Pole or Pipeline 21
- Mounting Rain Shield with 24
- Installation Kit 24
- Panel Mounting Frame 24
- Pressure connections 26
- Cable Bushings 27
- Grounding the Cables 28
- Alternate Wiring Systems 29
- WARNING 30
- M-12 (8-Pin) Connector 32
- D-9 Connector 33
- AC Power Supply Module 34
- Installation 35
- Warnings 36
- Analog Output Module AOUT-1T 40
- Relay Module RELAY-1L 42
- (RS485-1) 44
- Installation and Wiring 45
- 1102-028 46
- OPERATION 49
- Menus and Navigation 50
- Reading 51
- Graphic History 53
- Information Display 55
- Display Settings 56
- Rounding 57
- Backlight 57
- Contrast 57
- Keypad Lock 57
- Measuring Settings 58
- Diagnostic Settings 58
- Serial Interface Settings 59
- System Settings 60
- Factory Settings 61
- Clearing Graph Displays 61
- CAUTION 61
- Relay Settings 62
- Analog Output Settings 64
- Serial Line Communication 66
- User Port Connection 67
- Service Port Connection 68
- Terminal Program Settings 68
- 0810-070 69
- List of Serial Commands 70
- General Settings 72
- Table 14 Quantity Symbols 74
- UNIT [x] [y] 76
- DATE and TIME 77
- TIME [?] [x] 78
- Measurement Related Commands 79
- DPMAX [x] [y] [?] 80
- DPMAX 80
- AVRG [x] [?] 81
- HHCP [?] [x] [y] 81
- HQFE [?] [x] [y] 82
- HQNH [?] [x] [y] 82
- ICAOQNH 83
- PSTAB [?] [x] [y] 84
- User Port Serial Settings 86
- SMODE [x] 87
- INTV [xxx yyy] 88
- ECHO [x] [y] 88
- System Information Commands 89
- Resetting Barometer by Using 90
- Locking Menu/Keypad by Using 91
- Data Recording 92
- Selecting Data Recording 92
- Quantities 92
- View Recorded Data 93
- Operating Relays 95
- Quantity for Relay Output 95
- 1102-007 96
- Enabling/Disabling Relays 98
- Setting Relay Outputs 98
- RTEST to test 100
- RTEST [x1 x2] 100
- Operating RS-485 Module 101
- Networking Commands 101
- SMODE POLL 102
- OPEN [aa] 103
- SEND [aa] 103
- Operating Analog Output 104
- Analog Output Quantities 106
- Analog Output Tests 107
- Setting 107
- MAINTENANCE 109
- INFO button to display the 110
- Table 18 Error Messages 111
- Technical Support 112
- Product Returns 112
- CALIBRATION AND ADJUSTMENT 113
- Pressure Adjustment 115
- Serial Line 118
- LCP1 (LCP2 119
- MPCP1, MPCP2, MPCP3 120
- MPCP1 [x/y] [z] 121
- Activate MPCP1 adjustment: 122
- Using Display/Keypad 123
- Using Serial Line 124
- TECHNICAL DATA 127
- Operating Environment 128
- Inputs and outputs 129
- Mechanics 130
- Technical Specifications of 130
- Optional Modules 130
- Table 30 Relay Module 131
- Options and Accessories 132
- Dimensions (in mm) 133
- CALCULATION FORMULAS 135
- ICAOQNH Mode for QNH and QFE 136
- UNIT CONVERSION TABLES 137
- Min...Max 138
- PA11A EMULATION MODE 141
- PA11A Message Format 142
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