Vaisala HMW90 User Manual download pdf (Page 34)

User's Guide _______________________________________________________________________

32 ___________________________________________________________________ M211399EN-F

Connecting a Common AC Power Supply

to Several Transmitters

If you are connecting a common 24 VAC power supply to several

transmitters, make sure to connect the same terminal to +Vs and –Vs on

all transmitters. This will avoid a short-circuit through the shared

common line at the controller; see Figure 19 below.

1112-026

Figure 19 Connecting a Common AC Power Supply (HMW93)

+Vs OUT

-Vs

+Vs OUT

-Vs GND

Shared

common

line

HMW93

CONTROLLER

24 VAC

Supply

volt

age

Supply

voltage

Signal

output

Signal

output

GND

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 109 110

USER'S GUIDE 1
Table of Contents 3
CHAPTER 4 4
CHAPTER 5 5
CHAPTER 6 5
CHAPTER 7 5
APPENDIX A 5
APPENDIX B 6
List of Figures 7
List of Tables 8
GENERAL INFORMATION 9
Version Information 10
Related Manuals 10
Documentation Conventions 10
Recycling 11
Regulatory Compliances 12
Patent Notice 12
Trademarks 12
Software License 12
Warranty 13
PRODUCT OVERVIEW 15
HMW90 Series Transmitters 16
Output Parameters Explained 17
Transmitter parts 18
1201-005 19
1201-006 20
1209-013 21
INSTALLATION 23
HMW92/TMW92 HMW93/TMW 24
Relative Humidity (%) 26
1209-016 28
128 64 32 16 8 4 2 1 29
Binary: 10100001 29
Decimal: 161 29
(128 + 32 + 1) 29
Selecting Location 30
Wiring HMW92 31
Wiring HMW93 32
-T -Vs+T +Vs 33
CONTROLLER 34
Wiring HMW95 35
OPERATION 37
Measurement Screen 38
Service Port 39
Connecting With a PC 40
0807-004 42
List of Serial Commands 43
Transmitter Information 44
Show Transmitter Status 45
>status 46
Show Measured Parameters 47
Show Command Help 47
Measurement Settings 48
Analog Output Settings 49
Set Analog Output Scaling 50
Display Settings 52
Serial Line Output Commands 53
Output a Reading Once 54
Set Output Interval 54
Set Output Format 55
Serial Line Settings 56
Set Relay Mode 57
Relay Configuration Examples 59
Adjust Humidity Measurement 60
Show Current T Adjustment 62
Information 63
Testing Commands 64
Other Commands 65
Reset Transmitter 66
Set BACnet Parameters 66
MAINTENANCE 69
Calibration and Adjustment 70
CAUTION 71
Adjustment Using an HM70 72
Adjustment Using a PC 73
Repair Maintenance 74
1112-028 75
TROUBLESHOOTING 77
Error Messages 78
View Error Table 79
Error State 80
Switches 81
Technical Support 83
Product Returns 83
TECHNICAL DATA 85
Table 17 Mechanics 86
Table 16 Inputs and Outputs 86
Spare Parts and Accessories 87
Dimensions in mm 88
BACNET REFERENCE 89
Device Object 92
Object_Identifier 93
Object_Name 93
System_Status 93
Relative Humidity object 94
Reliability 95
Temperature Object 96
Calculated Humidity Objects 98
Operation Pressure Object 100
Present Value 100
Status Flags 100
Event State 100
Out of Service 100
Operation Altitude Object 101
BIBBs Supported 102
MODBUS REFERENCE 105
Register Map 106
Measurement Data (Read-Only) 107
Status Registers (Read-Only) 108
Configuration Registers 108
Exception Responses 109
*M211399EN* 110

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Vaisala HMW90 User Manual Page 34

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