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

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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

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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

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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

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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

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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

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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.

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Version Information

		Table 1	Manual Revisions
		Manual Code		Description
		M211659EN-B		April 2014. This manual. Added transmitter models
				with analog outputs. Updated BACnet reference
				appendix.
		M211659EN-A		November 2013. First version.
		Related Manuals
		Table 2	Related Manuals
		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
		Documentation Conventions
		Throughout the manual, important safety considerations are highlighted
		as follows:
	WARNING	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	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	Note highlights important information on using the product.

8 ____________________________________________________________________ M211659EN-B

Chapter 1 _________________________________________________________ General Information

Safety

			The transmitter delivered to you has been tested and approved as shipped
			from the factory. Note the following precautions:
		WARNING	Connect only de-energized wires.
		CAUTION	If you connect more than one transmitter to a single 24 VAC transformer,
			always connect the phase (~) to the +Vs connector in each transmitter.
		CAUTION	The trimmers only turn 135 degrees each way, less than half a rotation.
			Do not force the trimmer past the stopping point.
		CAUTION	Do not modify the unit. Improper modification can damage the product
			or lead to malfunction.

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.

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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
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

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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.

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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

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Chapter 2 ___________________________________________________________ Product Overview

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
Model	Measurement	Output	Display	CO2 LEDs
			Visible
GMW93	CO2, temperature	2 x analog	No	No
		(0 ... 5/10V)
GMW93D	CO2, temperature	2 x analog	Yes	No
		(0 ... 5/10V)
GMW93R	CO2, humidity,	3 x analog	No	No
	temperature	(0 ... 5/10V)
GMW93RD	CO2, humidity,	3 x analog	Yes	No
	temperature	(0 ... 5/10V)
GMW93RA	CO2, humidity,	3 x analog	Yes	Yes
	temperature	(0 ... 5/10V)
GMW94	CO2, temperature	2 x analog	No	No
		(0/4 ... 20 mA)
GMW94D	CO2, temperature	2 x analog	Yes	No
		(0/4 ... 20 mA)
GMW94R	CO2, humidity,	3 x analog	No	No
	temperature	(0/4 ... 20 mA)
GMW94RD	CO2, humidity,	3 x analog	Yes	No
	temperature	(0/4 ... 20 mA)
GMW95	CO2, temperature	Digital	No	No
		(Modbus/BACnet)
GMW95D	CO2, temperature	Digital	Yes	No
		(Modbus/BACnet)
GMW95R	CO2, humidity,	Digital	No	No
	temperature	(Modbus/BACnet)
GMW95RD	CO2, humidity,	Digital	Yes	No
	temperature	(Modbus/BACnet)
GMW90*	CO2, temperature	Configurable	Optional	Optional
		(digital or analog)
GMW90R*	CO2, humidity,	Configurable	Optional	Optional
	temperature	(digital or analog)

* Factory configurable model. See order form for details.

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Output Parameters Explained

	Table 5	Parameters Supported by GMW90 Series
	Parameter	Symbol	Unit(s)	Description
	Carbon	CO2	ppm	Concentration of carbon dioxide
	dioxide			gas (CO2).
	Temperature	T	°C	Temperature in Celsius or
			°F	Fahrenheit scale.
	Relative	RH	%	Ratio of the partial pressure of
	humidity			water vapor in the air to the
				saturation vapor pressure of air
				at the current temperature.
	Dewpoint	Td	°C	Temperature at which the water
			°F	vapor in the air will condense into
				water at the current pressure.
	Dewpoint	Tdf	°C	Same as Td, except when the
			°F	dewpoint is below 0 °C, the
				transmitter outputs frostpoint (Tf)
				instead of dewpoint.
	Dewpoint	dTd	°C	Difference between ambient
	depression		°F	temperature and dewpoint (Tdf).
	Wet bulb	Tw	°C	The minimum temperature that
	temperature		°F	can be reached by evaporative
				cooling in the current conditions.
	Absolute	a	g/m3	Quantity of water in a cubic meter
	humidity		gr/ft3	(or cubic foot) of air.
	Mixing ratio	x	g/kg	Ratio of water vapor mass per
			gr/lb	kilogram (or pound) of dry air.
	Enthalpy	h	kJ/kg	Sum of the internal energy of a
			btu/lb	thermodynamic system.
NOTE	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.

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Chapter 2 ___________________________________________________________ Product Overview

Transmitter parts

		1
	7	2
	8	3
		4
	9

10

5

11

6

1310-038

Figure 2 Transmitter Parts - Outside

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:

-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, blinking at > 5000 ppm CO2.

9= Type label.

10= Holes for indicator LEDs (only in models with LED option).

11= Grip for slide.

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1

1201-005

Figure 3 Opening the Transmitter

1 = Push tab down with a screwdriver to open 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.

CAUTION	When opening or closing the transmitter, avoid damaging the transmitter
	electronics with the two plastic supports on the mounting base.

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Chapter 2 ___________________________________________________________ Product Overview

	1
2	6
3
	7

4 8 5

9

10

11

12

13

14 15

1310-039

Figure 4 Transmitter Parts – Inside

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).

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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.

1

2

3

1310-042

Figure 5 Decorative Cover

1= Decorative cover lid. If you intend to paint the cover, paint the outer surface of this part, and leave the other part entirely 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.

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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.

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DIP Switches of Analog Output Models

	-Metric		5V						-Metric			20m
Non Td		0					Custom	Non Td		0		A				Custom
		...									...
1	2	3	4	5	6	7	8	1	2	3		4	5	6	7	8

Metric

...

P

A

P

DI

Metric ..

DI

RH

10V

RH 20m

0

4

GMW93

GMW94

1402-027

Figure 6

DIP Switch Settings of Analog Output Models

DIP

Position

Setting

1

Non-metric

Non-metric units (°F).

Metric

Metric units (°C).

2

Td

Td (dewpoint) as humidity parameter on display and

analog output. Sets analog output scaling

to -20 ... +55 °C.

RH

RH (relative humidity) as humidity parameter on display

and analog output. Sets analog output scaling to

0 ... 100 %RH.

3

0...5V or

Set analog output channels to 0 ... 5 V (voltage output) or

0...20 mA

0 ... 20 mA (current output)

0...10V or

Set analog output channels to 0 ... 10 V (voltage output)

4...20 mA

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.

NOTE

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.

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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.

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User's Guide _______________________________________________________________________

DIP Switches of Digital Output Models

Modbus

Parity Even

Non-Metric

A B

C

ON
1	2	3	4	5	6	7	8

Baud	Metric
Rate
BACnet	Parity None

128 64 32 16 8 4 2 1

ON
1	2	3	4	5	6	7	8

Address

(Binary Weighting)

						1209-016
	Figure 7		DIP Switch Settings of Digital Output Models
	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
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.

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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:

	128 64 32										16				8		4		2			1
	ON																									Binary: 10100001
																										= Decimal: 161
	1			2						3	4				5		6		7			8				(128 + 32 + 1)

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.

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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.

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.

NOTE

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.

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Chapter 3 ________________________________________________________________ Installation

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.

1310-043

Figure 10 Installing the Mounting Base

Wiring

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.

WARNING Connect only de-energized wires.

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User's Guide _______________________________________________________________________

1310-044

Figure 11 Wiring from Behind (Recommended)

1310-045

Figure 12 Wiring from Above

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Wiring GMW93R/RA

Recommended wiring for long cables:

GND RH+ T+ CO2+ -Vs +Vs

V

V

V

Power supply 18 ... 35 VDC or 24 VAC ±20%

RL = 10 kΩ min.

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):

GND RH+ T+ CO2+ -Vs

+Vs

V

Power supply

V

18 ... 35 VDC

or 24 VAC ±20%

V

RL = 10 kΩ min.

1402-031

Figure 14 Alternate Wiring for GMW93R/RA

Wiring GMW93

GMW93 is wired in the same way as GMW93R/RA, except for the humidity output that is not present:

GND			T+ CO2+ -Vs +Vs

V

V

Power supply 18 ... 35 VDC or 24 VAC ±20%

RL = 10 kΩ min.

1402-030

Figure 15 Wiring GMW93

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User's Guide _______________________________________________________________________

Wiring GMW94R

-Vs terminal is internally connected to GND terminal.

GND RH+ T+ CO2+ -Vs +Vs

mA

mA

mA

Power supply 18 ... 35 VDC or 24 VAC ±20%

RL = 0 ... 600 Ω

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:

GND			T+ CO2+ -Vs +Vs

mA

mA

Power supply 18 ... 35 VDC or 24 VAC ±20%

RL = 0 ... 600 Ω

1402-033

Figure 17 Wiring GMW94

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