Vaisala GMW90 User Manual
USER'S GUIDE
Vaisala CARBOCAP® Carbon Dioxide,
Temperature, and Humidity Transmitters
GMW90 Series
M211659EN-B
PUBLISHED BY
Street address: Vanha Nurmijärventie 21, FI-01670 Vantaa, Finland
Mailing address: P.O. Box 26, FI-00421 Helsinki, Finland
Phone: +358 9 8949 1
Fax: +358 9 8949 2227
Visit our Internet pages at www.vaisala.com.
© Vaisala 2014
No part of this manual may be reproduced, published or publicly displayed in any form
or by any means, electronic or mechanical (including photocopying), nor may its
contents be modified, translated, adapted, sold or disclosed to a third party without prior
written permission of the copyright holder. Translated manuals and translated portions
of multilingual documents are based on the original English versions. In ambiguous
cases, the English versions are applicable, not the translations.
The contents of this manual are subject to change without prior notice.
This manual does not create any legally binding obligations for Vaisala towards
customers or end users. All legally binding obligations and agreements are included
exclusively in the applicable supply contract or the General Conditions of Sale and
General Conditions of Service of Vaisala.
_________________________________________________________________________________
Table of Contents
CHAPTER 1
GENERAL INFORMATION ............................................................................ 7
About This Manual ................................................................... 7
Contents of This Manual ....................................................... 7
Version Information ............................................................... 8
Related Manuals ................................................................... 8
Documentation Conventions ................................................. 8
Safety ......................................................................................... 9
ESD Protection ...................................................................... 9
Recycling ................................................................................ 10
Regulatory Compliances ....................................................... 10
Patent Notice .......................................................................... 10
Trademarks ............................................................................. 11
Software License .................................................................... 11
Warranty .................................................................................. 11
CHAPTER 2
PRODUCT OVERVIEW ................................................................................ 12
Introduction to GMW90 Series .............................................. 12
GMW90 Series Transmitters ................................................. 13
Output Parameters Explained ............................................... 14
Transmitter parts .................................................................... 15
Decorative Cover Option ....................................................... 18
CHAPTER 3
INSTALLATION ............................................................................................ 19
Configuration Before Installation ......................................... 19
Configuration of Analog Output Models .............................. 19
DIP Switches of Analog Output Models ......................... 20
Changing Between DIP and Custom Configuration ....... 21
Configuration of Digital Output Models ............................... 21
DIP Switches of Digital Output Models .......................... 22
Addressing with BACnet Protocol .................................. 23
Addressing with Modbus Protocol .................................. 23
Selecting Location ................................................................. 24
Installing the Mounting Base ................................................ 25
Wiring ...................................................................................... 25
Wiring GMW93R/RA ........................................................... 27
Wiring GMW93 .................................................................... 27
Wiring GMW94R ................................................................. 28
Wiring GMW94 .................................................................... 28
Wiring GMW95 .................................................................... 29
Connecting Several Transmitters on Same
RS-485 Line ................................................................... 29
VAISALA _________________________________________________________________________ 1
User's Guide _______________________________________________________________________
Connecting a Common AC Power Supply to Several
Transmitters ......................................................................... 30
CHAPTER 4
OPERATION ................................................................................................. 31
Display ..................................................................................... 31
Startup Screens ................................................................... 31
Measurement Screen .......................................................... 32
Indicators on the Display ..................................................... 33
Service Port ............................................................................. 33
Connecting With an MI70 Indicator ..................................... 33
Connecting With a Computer .............................................. 34
Installing the Driver for the USB Service Cable ............. 34
Terminal Application Settings ......................................... 35
List of Serial Commands ....................................................... 37
Transmitter Information ......................................................... 38
Show Transmitter Information ............................................. 38
Show Transmitter Firmware Version ................................... 38
Show Transmitter Serial Number ........................................ 38
Show Transmitter Status ..................................................... 39
Show Measured Parameters ............................................... 41
Show Command Help.......................................................... 41
Show Command List ........................................................... 42
Measurement Settings ........................................................... 42
Set Environmental Parameters ........................................... 42
Select Units ......................................................................... 43
Analog Output Settings ......................................................... 43
Set Analog Output Mode ..................................................... 43
Set Analog Output Scaling .................................................. 44
Set Output Clipping and Error Limit ..................................... 45
Display Settings ...................................................................... 47
Select Parameters to Display .............................................. 47
Serial Line Output Commands .............................................. 48
Start Measurement Output .................................................. 48
Stop Measurement Output .................................................. 48
Output a Reading Once ....................................................... 48
Set Output Interval ............................................................... 49
Set Output Format ............................................................... 50
Serial Line Settings ................................................................ 52
Set Remote Echo ................................................................ 52
Set Serial Line Turnaround Delay ....................................... 52
Calibration and Adjustment Commands .............................. 53
Adjust CO2 Measurement .................................................... 53
Show Current CO2 Adjustment ....................................... 53
1-point Adjustment of CO2 Measurement ...................... 54
2-point Adjustment of CO2 Measurement ...................... 54
Clear User Adjustment of CO2 Measurement ................ 55
Adjust Humidity Measurement ............................................ 55
Show Current RH Adjustment ........................................ 55
1-point Adjustment of RH Measurement ........................ 56
2-point Adjustment of RH Measurement ........................ 56
Clear User Adjustment of RH Measurement .................. 57
Adjust Temperature Measurement ...................................... 57
Show Current T Adjustment ........................................... 57
1-point Adjustment of T Measurement ........................... 57
2 ____________________________________________________________________ M211659EN-B
_________________________________________________________________________________
Clear User Adjustment of T Measurement .................... 58
Enter Calibration and Adjustment Information .................... 58
Testing Commands ................................................................ 59
Test Analog Outputs ........................................................... 59
Other Commands ................................................................... 60
Enable Advanced Serial Commands .................................. 60
Reset Transmitter ................................................................ 60
Set BACnet Parameters ...................................................... 61
Set CO2 Indicator LED Parameters ..................................... 62
CHAPTER 5
MAINTENANCE ........................................................................................... 63
Cleaning .................................................................................. 63
Calibration and Adjustment .................................................. 63
Adjustment Methods ........................................................... 63
Notes for CO2 Adjustment ................................................... 64
Using Calibration Gas vs. Ambient Gas......................... 64
Effect of Temperature on CO2 Measurement ................ 64
Effect of Pressure on CO2 Measurement ....................... 65
Notes for T Adjustment ....................................................... 65
Notes for RH Adjustment .................................................... 65
Adjustment Using Display and Trimmers ............................ 66
Adjustment Using a Hand-Held Meter ................................ 67
Adjustment Using a Computer ............................................ 68
Repair Maintenance ............................................................... 69
Replacing the GM10 Module ............................................... 70
Replacing the HTM10 Module ............................................. 71
CHAPTER 6
TROUBLESHOOTING ................................................................................. 72
Problem Situations ................................................................. 72
Error Messages ...................................................................... 73
Viewing Error Messages on Serial Line .............................. 74
View Currently Active Errors .......................................... 74
View Error Table ............................................................ 74
Error State ............................................................................... 75
Reverting to Factory Settings ............................................... 76
Reverting to Factory Settings Using DIP Switches ............. 76
Reverting to Factory Settings Using Service Port ............... 77
Technical Support .................................................................. 78
Product Returns ..................................................................... 78
CHAPTER 7
TECHNICAL DATA ...................................................................................... 79
Specifications ......................................................................... 79
Spare Parts and Accessories ................................................ 81
Dimensions in mm ................................................................. 82
APPENDIX A
BACNET REFERENCE ................................................................................ 83
VAISALA _________________________________________________________________________ 3
User's Guide _______________________________________________________________________
BACnet Protocol Implementation Conformance
Statement ................................................................................ 83
Transmitter Models and Objects ........................................... 85
Device Object .......................................................................... 86
Carbon Dioxide Object ........................................................... 88
Temperature Object ................................................................ 89
Relative Humidity Object ....................................................... 90
Calculated Humidity Objects ................................................. 91
Operation Pressure Object .................................................... 92
Operation Altitude Object ...................................................... 93
BIBBs Supported .................................................................... 94
Application Services Supported ........................................... 95
APPENDIX B
MODBUS REFERENCE ............................................................................... 96
4 ____________________________________________________________________ M211659EN-B
_________________________________________________________________________________
List of Figures
Figure 1 GMW90 with Visible Display and Indicator LEDs .................... 12
Figure 2 Transmitter Parts - Outside ...................................................... 15
Figure 3 Opening the Transmitter........................................................... 16
Figure 4 Transmitter Parts – Inside ........................................................ 17
Figure 5 Decorative Cover ...................................................................... 18
Figure 6 DIP Switch Settings of Analog Output Models ......................... 20
Figure 7 DIP Switch Settings of Digital Output Models .......................... 22
Figure 8 Example of Transmitter Addressing ......................................... 23
Figure 9 Selecting Transmitter Location ................................................. 24
Figure 10 Installing the Mounting Base .................................................... 25
Figure 11 Wiring from Behind (Recommended) ....................................... 26
Figure 12 Wiring from Above .................................................................... 26
Figure 13 Wiring GMW93R/RA ................................................................ 27
Figure 14 Alternate Wiring for GMW93R/RA ............................................ 27
Figure 15 Wiring GMW93 ......................................................................... 27
Figure 16 Wiring GMW94R ...................................................................... 28
Figure 17 Wiring GMW94 ......................................................................... 28
Figure 18 Wiring GMW95 ......................................................................... 29
Figure 19 Several Transmitters on Same RS-485 Line............................ 29
Figure 20 Connecting a Common AC Power Supply ............................... 30
Figure 21 GMW95R Startup Screens ....................................................... 31
Figure 22 Measurement Screen – Normal Operation .............................. 32
Figure 23 Measurement Screen – Problem With Humidity Measurement32
Figure 24 PuTTY Terminal Application..................................................... 36
Figure 25 Effect of Pressure on CO2 Reading ......................................... 65
Figure 26 Trimmer Centering Screen ....................................................... 66
Figure 27 Adjustment Screen ................................................................... 66
Figure 28 Disconnecting the GM10 Module ............................................. 70
Figure 29 Replacing the HTM10 Module .................................................. 71
Figure 30 DIP Switch Factory Reset (GMW93/94) ................................... 76
Figure 31 DIP Switch Factory Reset (GMW95) ........................................ 76
Figure 32 GMW90 Series Dimensions ..................................................... 82
Figure 33 Dimensions of the Mounting Base ........................................... 82
VAISALA _________________________________________________________________________ 5
User's Guide _______________________________________________________________________
List of Tables
Table 1 Manual Revisions ....................................................................... 8
Table 2 Related Manuals ......................................................................... 8
Table 3 Applicable Patents .................................................................... 10
Table 4 GMW90 Series Transmitters .................................................... 13
Table 5 Parameters Supported by GMW90 Series ............................... 14
Table 6 Serial Interface Settings ........................................................... 35
Table 7 Basic Serial Commands ........................................................... 37
Table 8 Advanced Serial Commands .................................................... 37
Table 9 FORM Command Parameters .................................................. 51
Table 10 FORM Command Modifiers ...................................................... 51
Table 11 Troubleshooting Table .............................................................. 72
Table 12 Error Messages ........................................................................ 73
Table 13 Performance ............................................................................. 79
Table 14 Operating Environment ............................................................. 80
Table 15 Inputs and Outputs ................................................................... 80
Table 16 Mechanics ................................................................................. 80
Table 17 GMW90 Series Spare Parts and Accessories .......................... 81
Table 18 Device Object Properties .......................................................... 86
Table 19 Carbon Dioxide Object Properties ............................................ 88
Table 20 Status Flags .............................................................................. 88
Table 21 Reliability .................................................................................. 88
Table 22 Event State ............................................................................... 88
Table 23 Temperature Object Properties ................................................ 89
Table 24 Status Flags .............................................................................. 89
Table 25 Reliability .................................................................................. 89
Table 26 Event State ............................................................................... 89
Table 27 Relative Humidity Object Properties ......................................... 90
Table 28 Status Flags .............................................................................. 90
Table 29 Reliability .................................................................................. 90
Table 30 Event State ............................................................................... 90
Table 31 Calculated Humidity Objects .................................................... 91
Table 32 Calculated Humidity Object Properties ..................................... 91
Table 33 Status Flags .............................................................................. 91
Table 34 Reliability .................................................................................. 92
Table 35 Event State ............................................................................... 92
Table 36 Operation Pressure Object Properties ..................................... 92
Table 37 Status Flags .............................................................................. 92
Table 38 Operation Altitude Object Parameters ...................................... 93
Table 39 Status Flags .............................................................................. 93
Table 40 BACnet Smart Sensor BIBBs Support...................................... 94
Table 41 BACnet Standard Application Services Support ...................... 95
Table 42 Modbus Functions Supported by GMW90 ............................... 96
Table 43 GMW90 Modbus Measurement Data Registers ....................... 96
Table 44 GMW90 Modbus Status Registers (Read-only) ....................... 97
Table 45 GMW90 Modbus Error Code Bits ............................................. 97
Table 46 GMW90 Modbus Configuration Parameter Registers .............. 97
Table 47 GMW90 Modbus Device Identification ..................................... 98
Table 48 GMW90 Modbus Exception Responses ................................... 98
6 ____________________________________________________________________ M211659EN-B
Chapter 1 _________________________________________________________ General Information
CHAPTER 1
GENERAL INFORMATION
This chapter provides general notes for the manual and the products that
are covered.
About This Manual
This manual provides information for installing, operating, and
maintaining GMW90 series transmitters. All transmitter models in the
series are covered, which means that some information in the manual is
model-specific.
Contents of This Manual
This manual consists of the following chapters:
- Chapter 1, General Information, provides general notes for the manual
and the products that are covered.
- Chapter 2, Product Overview, introduces the GMW90 series
transmitters.
- Chapter 3, Installation, provides you with information that is intended
to help you install the GMW90 series transmitters.
- Chapter 4, Operation, contains information that is needed to operate
the GMW90 series transmitters.
- Chapter 5, Maintenance, provides information that is needed in basic
maintenance of the GMW90 series.
- Chapter 6, Troubleshooting, describes possible problems, their
probable causes and remedies, and provides contact information for
technical support.
- Chapter 7, Technical Data, provides the technical data of the GMW90
series transmitters.
- Appendix A, BACnet Reference,describes the BACnet protocol
implementation of the GMW90 series digital transmitters.
- Appendix B, Modbus Reference, describes the Modbus protocol
implementation of the GMW90 series digital transmitters.
VAISALA _________________________________________________________________________ 7
User's Guide _______________________________________________________________________
Manual Code
Description
M211659EN-B
April 2014. This manual. Added transmitter models
appendix.
M211659EN-A
November 2013. First version.
Manual Code
Manual Name
M211511EN
HMW90 and GMW90 Series Quick Guide for
Digital Output models
M211398EN
HMW90 and GMW90 Series Quick Guide for
Analog Output models
M211476EN
Decorative Cover Quick Guide
M211606EN
Decorative Cover Printable Insert
Version Information
Table 1 Manual Revisions
with analog outputs. Updated BACnet reference
Related Manuals
Table 2 Related Manuals
WARNING
CAUTION
NOTE
Documentation Conventions
Throughout the manual, important safety considerations are highlighted
as follows:
Warning alerts you to a serious hazard. If you do not read and follow
instructions very carefully at this point, there is a risk of injury or even
death.
Caution warns you of a potential hazard. If you do not read and follow
instructions carefully at this point, the product could be damaged or
important data could be lost.
Note highlights important information on using the product.
8 ____________________________________________________________________ M211659EN-B
Chapter 1 _________________________________________________________ General Information
Connect only de
If you connect more than one transmitter to a single 24 VAC transformer,
always connect the phase (~) to the +Vs connector in each transmitter.
The trimmers only turn 135 degrees each way, less than half a rotation.
Do not force the trimmer past the stopping po
Do not modify the unit. Improper modification can damage the product
or lead to malfunction.
Safety
The transmitter delivered to you has been tested and approved as shipped
from the factory. Note the following precautions:
WARNING
CAUTION
CAUTION
CAUTION
-energized wires.
int.
ESD Protection
Electrostatic Discharge (ESD) can cause immediate or latent damage to
electronic circuits. Vaisala products are adequately protected against
ESD for their intended use. It is possible to damage the product,
however, by delivering electrostatic discharges when touching,
removing, or inserting any objects inside the equipment housing.
To make sure you are not delivering high static voltages yourself:
- When installing the transmitter, do not touch exposed contacts on the
component board.
- Handle ESD sensitive components on a properly grounded and
protected ESD workbench.
- Always hold component boards by the edges and avoid touching the
component contacts.
VAISALA _________________________________________________________________________ 9
User's Guide _______________________________________________________________________
Patent Issued By
Patent Number
United States Patent and Trademark Office
US 5,827,438
US 6,177,673
European Patent Office
EP0776023
EP0922972
German Patent and Trade Mark Office
69615635
Japan Patent Office
4263285
Finnish Patent Office
112005
105598
Recycling
Recycle all applicable material.
Dispose of the unit according to statutory regulations.
Do not dispose of with regular household refuse.
Regulatory Compliances
GMW90 series transmitters comply with the following performance and
environmental test standards:
- EMC Directive
Conformity is shown by compliance with the following standards:
- EN 61326-1: Electrical equipment for measurement, control, and
laboratory use – EMC requirements – for use in industrial locations.
- EN 550022: Information technology equipment – Radio disturbance
characteristics – Limits and methods of measurement.
Patent Notice
GMW90 series are protected by the following patents and their
corresponding national rights:
Table 3 Applicable Patents
10 ___________________________________________________________________ M211659EN-B
Chapter 1 _________________________________________________________ General Information
Trademarks
CARBOCAP® is a registered trademark of Vaisala Oyj.
All other trademarks are the property of their respective owners.
Software License
This product contains software developed by Vaisala. Use of the software
is governed by license terms and conditions included in the applicable
supply contract or, in the absence of separate license terms and
conditions, by the General License Conditions of Vaisala Group.
Warranty
Visit our Internet pages for standard warranty terms and conditions:
www.vaisala.com/warranty.
Please observe that any such warranty may not be valid in case of
damage due to normal wear and tear, exceptional operating conditions,
negligent handling or installation, or unauthorized modifications. Please
see the applicable supply contract or Conditions of Sale for details of the
warranty for each product.
VAISALA ________________________________________________________________________ 11
User's Guide _______________________________________________________________________
CHAPTER 2
PRODUCT OVERVIEW
This chapter introduces the GMW90 series transmitters.
Introduction to GMW90 Series
GMW90 series transmitters are wall-mount transmitters for building
automation applications. All GMW90 series transmitters measure carbon
dioxide (CO2) and temperature (T), and some models also include
humidity measurement. The CO2 measurement is based on a new
generation CARBOCAP® sensor, which uses a novel, silicon-based
microchip emitter instead of an incandescent light bulb.
All transmitter models in the series share the following common features:
- Detachable mounting base for easy installation and wiring.
- Display (visible or hidden behind the cover).
- Sliding cover for accessing maintenance functions.
- Adjustment trimmers.
- DIP switches for most common configuration tasks.
- RS-485 line for temporary service use with hand-held MI70 indicator
or PC.
1310-036
Figure 1 GMW90 with Visible Display and Indicator LEDs
12 ___________________________________________________________________ M211659EN-B
Chapter 2 ___________________________________________________________ Product Overview
Model
Measurement
Output
Display
Visible
CO2 LEDs
GMW93
CO2, temperature
2 x analog
(0 ... 5/10V)
No
No
GMW93D
CO2, temperature
2 x analog
(0 ... 5/10V)
Yes
No
GMW93R
CO2, humidity,
temperature
3 x analog
(0 ... 5/10V)
No
No
GMW93RD
CO2, humidity,
temperature
3 x analog
(0 ... 5/10V)
Yes
No
GMW93RA
CO2, humidity,
temperature
3 x analog
(0 ... 5/10V)
Yes
Yes
GMW94
CO2, temperature
2 x analog
(0/4 ... 20 mA)
No
No
GMW94D
CO2, temperature
2 x analog
(0/4 ... 20 mA)
Yes
No
GMW94R
CO2, humidity,
temperature
3 x analog
(0/4 ... 20 mA)
No
No
GMW94RD
CO2, humidity,
temperature
3 x analog
(0/4 ... 20 mA)
Yes
No
GMW95
CO2, temperature
Digital
(Modbus/BACnet)
No
No
GMW95D
CO2, temperature
Digital
(Modbus/BACnet)
Yes
No
GMW95R
CO2, humidity,
temperature
Digital
(Modbus/BACnet)
No
No
GMW95RD
CO2, humidity,
temperature
Digital
(Modbus/BACnet)
Yes
No
GMW90*
CO2, temperature
Configurable
(digital or analog)
Optional
Optional
GMW90R*
CO2, humidity,
temperature
Configurable
(digital or analog)
Optional
Optional
GMW90 Series Transmitters
Table 4 below lists the most important differences between the GMW90
series transmitter models. For technical specifications, see Chapter 7,
Technical Data, on page 79.
Table 4 GMW90 Series Transmitters
* Factory configurable model. See order form for details.
VAISALA ________________________________________________________________________ 13
User's Guide _______________________________________________________________________
Parameter
Symbol
Unit(s)
Description
Carbon
dioxide
CO2
ppm
Concentration of carbon dioxide
gas (CO2).
Temperature
T
°C
°F
Temperature in Celsius or
Fahrenheit scale.
Relative
RH % Ratio of the partial pressure of
at the current temperature.
Dewpoint
Td
°C
Temperature at which the water
water at the current pressure.
Dewpoint
Tdf
°C
Same as Td, except when the
instead of dewpoint.
Dewpoint
depression
dTd
°C
°F
Difference between ambient
temperature and dewpoint (Tdf).
Wet bulb
Tw
°C
The minimum temperature that
cooling in the current conditions.
Absolute
humidity
a
g/m3
gr/ft3
Quantity of water in a cubic meter
(or cubic foot) of air.
Mixing ratio
x
g/kg
gr/lb
Ratio of water vapor mass per
kilogram (or pound) of dry air.
Enthalpy
h
kJ/kg
btu/lb
Sum of the internal energy of a
thermodynamic system.
Output Parameters Explained
Table 5 Parameters Supported by GMW90 Series
NOTE
humidity
temperature
°F
°F
°F
water vapor in the air to the
saturation vapor pressure of air
vapor in the air will condense into
dewpoint is below 0 °C, the
transmitter outputs frostpoint (Tf)
can be reached by evaporative
All of these parameters are visible and selectable using the service port
(serial line and MI70 indicator use) even if your transmitter model does
not have a humidity sensor. However, the transmitter will not show any
measurement results for parameters that it cannot measure or calculate.
14 ___________________________________________________________________ M211659EN-B
Chapter 2 ___________________________________________________________ Product Overview
1 = Locking screw for mounting base.
Not included, M3×6 recommended.
2 = Inlet for CO2 calibration gas.
Use a 3 mm inner diameter silicone tube and 0.4 l/min flow.
3 = Adjustment trimmers.
4 = Service port.
5 = Window for display (only in models where the display is visible)
6 = Locking screw for slide. Not included, M3×6 recommended.
7 = Display.
8 = CO2 level indicator LEDs. Enabled on models with LED option.
Default settings:
blinking at > 5000 ppm CO2.
9 = Type label.
10 = Holes for indicator LEDs (only in models with LED option).
11 = Grip for slide.
7
9
8
11
10
1
3
4
2
5
6
Transmitter parts
1310-038
Figure 2 Transmitter Parts - Outside
VAISALA ________________________________________________________________________ 15
- Green LED (bottom): lit between 0 ... 800 ppm CO2.
- Yellow LED (middle): lit between 800 ... 1200 ppm CO2.
- Red LED (top): lit between 1200 ... 5000 ppm CO2,
User's Guide _______________________________________________________________________
1 = Push tab down with a screwdriver to open the transmitter.
1
CAUTION
1201-005
Figure 3 Opening the Transmitter
To open, use a screwdriver to push down the tab that holds the
transmitter cover and mounting base together. Pull the mounting base
away from the cover, starting from the top.
To close, connect the bottom of the transmitter first, and tilt the top
forward to close the tab. Do not push on the display. Closing the
transmitter starts it up if power is supplied to the screw terminals.
When opening or closing the transmitter, avoid damaging the transmitter
electronics with the two plastic supports on the mounting base.
16 ___________________________________________________________________ M211659EN-B
Chapter 2 ___________________________________________________________ Product Overview
1 = Mounting base.
2 = Opening for cable (wiring from top).
3 = Terminal label.
4 = Opening for cable (wiring from behind, recommended).
5 = Label for RS-485 baud rate DIP switch settings.
Included only on digital models.
6 = Orientation arrow – should point up after the mounting base has
been installed.
7 = Screw terminals.
8 = Place for zip tie (for cable strain relief)
9 = Transmitter body.
10
=
RS-485 termination jumper (connects a 120 Ω resistor).
Included only on digital models.
11 = GM10 module (measures CO2).
12 = DIP switches for common configuration options. Digital models
have an extra DIP switch bank for transmitter address.
13 = Grip for slide.
14 = TM10 module (measures temperature only) or
HTM10 module (measures humidity and temperature).
15 = HUMICAP® sensor (on models with humidity measurement).
2
3
4
6
8
7
14 15
1
9
13
10
11
5
12
1310-039
Figure 4 Transmitter Parts – Inside
VAISALA ________________________________________________________________________ 17
User's Guide _______________________________________________________________________
1 = Decorative cover lid. If you intend to paint the cover, paint the
outer surface of this
unpainted.
2 = Space for wallpaper or printed insert. The decorative cover is
delivered with a quick guide that can be used as a stencil for
cutting the required shape.
3 = Decorative cover base part.
1
2
3
Decorative Cover Option
The decorative cover is an installation accessory for HMW90 and
GMW90 series transmitters that can be used to hide the transmitter from
view. The cover material is transparent polycarbonate, but the idea is to
customize it to match the wall the transmitter is on. There are two easy
ways to change the cover’s appearance:
- Paint the cover to the same color as the wall.
- Insert a piece of wallpaper under the lid.
You can also use the cover as a holder for printed material, for example
an informational sign.
You must remove the sliding cover of the transmitter to install the
decorative cover. Installation instructions are included with the cover.
Figure 5 Decorative Cover
part, and leave the other part entirely
18 ___________________________________________________________________ M211659EN-B
1310-042
Chapter 3 ________________________________________________________________ Installation
CHAPTER 3
INSTALLATION
This chapter provides you with information that is intended to help you
install the GMW90 series transmitters.
Configuration Before Installation
If you need to change the settings of the transmitter, it is best to do this
before it has been installed. Available configuration options are different
for analog output models (such as GMW93) and digital output models
(for example, GMW95).
Configuration of Analog Output Models
You can configure analog output models of GMW90 series transmitters
in two ways:
- Using the DIP switches on the component board. See section DIP
Switches of Analog Output Models on page 20.
- Configuring the settings in software through the service port. See
connection instructions and serial line commands in Chapter 4,
Operation, on page 31.
These two configuration methods are mutually exclusive. If the DIP
switch configuration is used, software settings have no effect on settings
that are controlled by the DIP switches. Additionally, standard analog
output settings and display configuration are always set in the DIP
configuration mode. DIP switch number 8 is the master switch that
controls which configuration method is used.
VAISALA ________________________________________________________________________ 19
User's Guide _______________________________________________________________________
DIP
Position
Setting
1
Non-metric
Non-metric units (°F).
Metric
Metric units (°C).
2
Td
Td (dewpoint) as humidity parameter on display and
to -20 ... +55 °C.
RH
RH (relative humidity) as humidity parameter on display
0 ... 100 %RH.
3
0...5V or
0...20 mA
Set analog output channels to 0 ... 5 V (voltage output) or
0 ... 20 mA (current output)
0...10V or
4...20 mA
Set analog output channels to 0 ... 10 V (voltage output)
or 4 ... 20 mA (current output)
4
Not used
5 Not used
6 Not used
7 Not used
8 Custom
Configuration through service port only.
DIP
Configuration by DIP switches only.
Resets display analog outputs to standard settings.
Non-Metric
Td
0...20mA
Custom
Metric
RH
4..20mA
DIP
1
2 3 4
5 6
7
8
Non-Metric
Td
Custom
Metric
RH
DIP
1
2 3 4
5 6
7
8
GMW93 GMW94
0...5V
0...10V
DIP Switches of Analog Output Models
1402-027
Figure 6 DIP Switch Settings of Analog Output Models
NOTE
analog output. Sets analog output scaling
and analog output. Sets analog output scaling to
If DIP switch 8 is set to Custom, the transmitter ignores all other DIP
switch settings. In custom mode the transmitter uses settings that are
configured in software using the service port. Before changing the
position of this switch, see section Changing Between DIP and Custom
Configuration on page 21.
20 ___________________________________________________________________ M211659EN-B
Chapter 3 ________________________________________________________________ Installation
Changing Between DIP and Custom Configuration
If you change the position of DIP switch 8, note the following:
When changing from DIP to Custom: The DIP settings that were used
when the power was last on are carried over to the custom settings at next
power up.
When changing from Custom to DIP: Current custom settings are
overwritten by the settings from the DIP switches at next power up.
Display layout and analog outputs are set to default settings:
- Channel 1 output parameter CO2, scaling 0 ... 2000 ppm.
- Channel 2 output parameter T, scaling -5 ... +55 °C.
- Channel 3 output parameter RH, scaling 0 ... 100 %RH (if humidity
measurement is present on the transmitter).
If you have a factory customized transmitter, this may lead to a situation
where the wiring label on the mounting base does not reflect the outputs
of the transmitter. To return the transmitter to its factory customized
settings, follow the instructions in section Reverting to Factory Settings
on page 76.
Configuration of Digital Output Models
Digital output models of the GMW90 series have the following
configuration interfaces:
- DIP switches on the component board control operating protocol,
serial line settings, and transmitter MAC address. For instructions, see
DIP Switches of Digital Output Models on page 22.
- You can set a jumper for RS-485 line termination on the component
board (120 Ω resistor). For location of the jumper, see Figure 4 on
page 17.
- Other settings are configured in software. You can change most
configuration settings through the service port. For connection
instructions and serial line commands, see Chapter 4, Operation, on
page 31.
- Some configuration actions can be done using the BACnet and
Modbus protocols. See the following appendices for protocol
implementation details:
- Appendix A, BACnet Reference, on page 83.
- Appendix B, Modbus Reference, on page 96.
VAISALA ________________________________________________________________________ 21
User's Guide _______________________________________________________________________
DIP
Position
Setting
1
Modbus
Modbus protocol in use.
BACnet
BACnet protocol in use.
2 ... 4
A B C
Serial line baud rate.
Off
Off
Off
Automatic (default).
Off
Off
On
4800 (not available with BACnet protocol)
Off
On
Off
9600
Off
On
On
19200
On
Off
Off
38400
On
Off
On
57600
On
On
Off
76800
On
On
On
115200
5
Parity Even
Select 8 data bits, parity even, one stop bit
(8E1) for Modbus protocol.
Parity None
Select 8 data bits, parity none, and two stop bits
(8N2) for Modbus protocol.
6
Non-Metric
Use non-metric units on display and service
port. No effect on Modbus and BACnet.
Metric
Use metric units on display and service port.
No effect on Modbus and BACnet.
7
Not used
8
Not used
1
ON
2 3 4
5 6
7
8
Modbus
BACnet
Parity Even
A B C
Parity None
Baud
Rate
1
2 3 4
5 6
7
8
128 64 32 16 8 4 2 1
Address
(Binary Weighting)
ON
Metric
Non-Metric
DIP Switches of Digital Output Models
1209-016
Figure 7 DIP Switch Settings of Digital Output Models
NOTE
If the serial line baud rate is set to Automatic, the transmitter attempts to
determine the baud rate of the traffic in the RS-485 network. The
transmitter cycles through all baud rate choices, listening for 10 seconds
at each rate. When it detects valid RS-485 traffic, it remains at the
detected baud rate until it is reset or power cycled.
22 ___________________________________________________________________ M211659EN-B
Chapter 3 ________________________________________________________________ Installation
1
2 3 4
5 6
7
8
128 64 32 16 8 4 2 1
ON
Binary: 10100001
Decimal: 161
(128 + 32 + 1)
=
Dip switches marked Address (Binary Weighting) set the MAC address
of the GMW90 series digital transmitter. The address is encoded in eight
bit binary form, with each numbered switch representing a single bit. For
example:
1209-009
Figure 8 Example of Transmitter Addressing
Addressing with BACnet Protocol
BACnet MS/TP MAC address range is 0 … 255. The transmitter is a
BACnet MS/TP master if address is below 128. Otherwise the transmitter
is a slave.
Addressing with Modbus Protocol
Transmitter is always a Modbus slave. MAC address range for Modbus
slaves is 1 … 247.
VAISALA ________________________________________________________________________ 23
User's Guide _______________________________________________________________________
Selecting Location
The conditions at the location should represent well the area of interest.
Do not install the transmitter on the ceiling. Avoid placing the transmitter
near heat and moisture sources, close to the discharge of the supply air
ducts, and in direct sunlight.
NOTE
1111-070
Figure 9 Selecting Transmitter Location
Use the mounting holes to attach the mounting base securely. Use at least
two screws (not included, max screw diameter 4 mm). Remember to
leave sufficient clearance below the transmitter to operate the slide. For
mounting dimensions, see section Dimensions in mm on page 82.
When bringing a cable through the wall, note that the hole may also
supply air from outside the room into the transmitter. This may affect the
measurement readings. For example, fresh concrete binds CO2 and may
cause low readings, especially in new buildings. Seal the cable opening if
necessary.
24 ___________________________________________________________________ M211659EN-B
Chapter 3 ________________________________________________________________ Installation
Connect only de
Installing the Mounting Base
Use the mounting holes to attach the mounting base securely. Use at least
two screws (not included). The arrow on the mounting base must point
straight up after installation. Proper orientation is important: air must
flow through the vents on the bottom and top.
Wiring
WARNING
1310-043
Figure 10 Installing the Mounting Base
Connect the wiring to the screw terminals on the mounting base. The
supply voltage and terminal assignments are model-specific. Max wire
size 2 mm2 (AWG14).
You can bring the cable to the housing from above or from
behind (recommended). If you are wiring a GMW90 series transmitter
from above, note that the GM10 module takes up significant space inside
the transmitter. To make sure there is enough space to close the
transmitter, use a < Ø 5 mm cable, and route it from the left side of the
mounting base. See Figure 12 on page 26.
After completing the wiring, connect the transmitter body over the
mounting base. Note that mounting bases are model-specific.
-energized wires.
VAISALA ________________________________________________________________________ 25
User's Guide _______________________________________________________________________
1310-044
Figure 11 Wiring from Behind (Recommended)
1310-045
Figure 12 Wiring from Above
26 ___________________________________________________________________ M211659EN-B
Chapter 3 ________________________________________________________________ Installation
T+
GND -VsCO2+ +Vs
Power supply
18 ... 35 VDC
or 24 VAC ±20%
V
RL = 10 kΩ min.
V
RH+
V
T+
GND -Vs
CO
2
+ +Vs
Power supply
18 ... 35 VDC
or 24 VAC ±20%
RL = 10 kΩ min.
V
RH+
V
V
T+
GND -VsCO2+ +Vs
Power supply
18 ... 35 VDC
or 24 VAC ±20%
V
R
L
= 10 kΩ min.
V
Wiring GMW93R/RA
Recommended wiring for long cables:
1402-032
Figure 13 Wiring GMW93R/RA
-Vs terminal is internally connected to GND terminal, so you can also
use the -Vs terminal as common ground. Maximum cable resistance is
2.5 Ω (24V supply, 0 ... 10 V output):
1402-031
Figure 14 Alternate Wiring for GMW93R/RA
Wiring GMW93
VAISALA ________________________________________________________________________ 27
GMW93 is wired in the same way as GMW93R/RA, except for the
humidity output that is not present:
1402-030
Figure 15 Wiring GMW93
User's Guide _______________________________________________________________________
T+GND -VsCO
2
+ +Vs
Power supply
18 ... 35 VDC
or 24 VAC ±20%
RH+
R
L
= 0 ... 600 Ω
mA
mA
mA
T+GND -VsCO
2
+ +Vs
Power supply
18 ... 35 VDC
or 24 VAC ±20%
RL = 0 ... 600 Ω
mA
mA
Wiring GMW94R
-Vs terminal is internally connected to GND terminal.
1402-034
Figure 16 Wiring GMW94R
Wiring GMW94
GMW94 is wired in the same way as GMW94R, except for the humidity
output that is not present:
1402-033
28 ___________________________________________________________________ M211659EN-B
Figure 17 Wiring GMW94
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