Siemens QSA2700D Operator's manual

QSA2700D / QSA2700 / AQS2700
Fine dust room sensor
Basic Documentation
A6V11160936_en--_c Smart Infrastructure
2019-04-10

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Table of Contents
1 About this document............................................................................. 5
1.1 Revision history...........................................................................................5
1.2 Reference documents..................................................................................5
1.3 Before you start...........................................................................................5
2 Product overview ................................................................................. 7
2.1 Type summary.............................................................................................7
2.2 Contents of QSA2700D and QSA2700.........................................................7
2.3 Features......................................................................................................7
2.4 Device overview ..........................................................................................8
2.5 Normal display overview of QSA2700D........................................................9
3 Installation..........................................................................................10
3.1 Mounting requirements..............................................................................10
3.2 Wiring........................................................................................................11
3.3 Installation.................................................................................................12
4 Configurations....................................................................................14
4.1 Modbus configuration parameters..............................................................14
4.2 Modbus registers (Software version 1.2.12)...............................................14
4.3 Modbus registers (Software version 1.3.13)...............................................15
4.4 Push button configuration (QSA2700)........................................................18
4.4.1 On-event addressing (ClimatixTM controllers configuration)..........18
4.4.2 Reset Modbus parameter............................................................19
4.5 LED colors and patterns (QSA2700)..........................................................19
4.6 Initial setup (QSA2700D)...........................................................................19
4.7 Change settings.........................................................................................21
4.7.1 Change language (QSA2700D)...................................................21
4.7.2 Change Air Quality Index class (QSA2700D)...............................22
4.7.3 Change display format (QSA2700D)...........................................23
4.7.4 Change theme (QSA2700D).......................................................25
4.8 Analog output range selection (QSA2700D)...............................................25
4.9 Modbus configuration (QSA2700D)............................................................26
4.9.1 Modify Modbus settings (QSA2700D)..........................................28
5 Technical data....................................................................................31
5.1 Power supply.............................................................................................31
5.2 Functional data for PM2.5..........................................................................31
5.3 Functional data for PM10...........................................................................31
5.4 Connections ..............................................................................................31
5.5 Housing protection class............................................................................31
5.6 Operation conditions..................................................................................32
5.7 Storage and transportation conditions........................................................32
5.8 Standards..................................................................................................32
5.9 General data..............................................................................................32
5.10 Display (QSA2700D) .................................................................................32

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6 Maintenance...................................................................................... 33
6.1 Replacing AQS2700..................................................................................33
6.2 Proximity sensor (QSA2700D)...................................................................34
6.3 Troubleshooting.........................................................................................35
6.4 Disposal ....................................................................................................35
7 Air Quality Index classes..................................................................... 36
8 Standard compliance..........................................................................37
9 Appendices........................................................................................ 38
9.1 Cyber security disclaimer...........................................................................38

About this document
Revision history
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1 About this document
1.1 Revision history
Edition Date Changes Section
c 2019-03 Add information about “Modify Modbus
settings” ●Normal display overview
●Modbus register
●Push button configuration
●Change display value
●Change theme
●Analog output range selection
●Modbus configuration
●Modify Modbus settings
b 2018-01 Frequency Technical data
a 2017-12 First version. All
1.2 Reference documents
Ref. Document title Document number
1 Mounting instructions A6V11160930
2 Datasheet A6V11160938
You can download the above documents at http://siemens.com/bt/download;
Simply search by document numbers.
1.3 Before you start
This document may be duplicated and distributed only with the expressed
permission of Siemens Switzerland Ltd.
These documents were prepared with great care.
●The content of all documents is checked at regular intervals.
●All necessary corrections are included in subsequent versions.
●Documents are automatically amended as a consequence of modifications and
corrections to the products described.
Please make sure that you are aware of the latest document revision date.
If you find any lack of clarity while using this document, or if you have any criticisms
or suggestions, please contact your local point of contact (POC) at the nearest
branch office. Addresses for Siemens RCs are available at www.siemens.com/sbt.
Markups
Special markups are indicated in the document as follows:
●Numbered lists and instructions with an operation sequence
1.
2. Procedures must be performed in the specified order.
[➙X] Reference to a page number
Symbol identifications
Copyright
Quality assurance
Conventions for text
marking

About this document
Before you start
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WARNING
This is the symbol for hazard. It warns you of
Risks of injury.
Comply with all
measures designated by this symbol to prevent injury or death.
NOTICE
This symbol identifies an important notice that you should be aware of when you
are using the product.
Before using products from Siemens Switzerland Ltd., it is important that you read
the documents supplied with or ordered at the same time as the products
(equipment, applications, tools, and so on) carefully and in full.
Before you get started, make sure you have an internet connection, a valid Email
address and a smartphone in hand.
Additional information on products and applications is available:
●From your Siemens branch office www.siemens.com/sbt or at your system
suppliers.
●From the support team at headquarters [e-mail]
if no local POC is available.
Siemens assumes no liability to the extent allowed under the law for any losses
resulting from a failure to comply with the aforementioned points or for the
improper compliance of the same.
Document use/ request to
the reader

Product overview
Type summary
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2 Product overview
The fine dust room sensor is designed to measure and transmit indoor
concentrations of PM2.5 and PM10. This wall-mounted product has variants with or
without displays and can connect directly to Siemens BT controllers as well as
many third party controllers via voltage output or Modbus.
2.1 Type summary
Type Order number Description Display
QSA2700 S55720-S457 Room sensor for detection
of PM2.5 and PM10 3-color LED service indication
QSA2700D S55720-S458 Room sensor with LCD
display for detection of
PM2.5 and PM10
2.4-inch color LCD screen for
PM2.5 values, Air Quality Index,
and service
AQS2700 S55720-S459 Sensor module for
replacement
2.2 Contents of QSA2700D and QSA2700
Items Quantity
Fine dust sensor 1
Plastic mounting plate 1
Screws 2 pcs
Mounting instructions 1
2.3 Features
The fine dust room sensor is designed to measure and transmit indoor
concentrations of PM2.5 and PM10.
●0…10 V and Modbus output
●Configurable Modbus parameters
●Quick configuration (on-event addressing) with Siemens ClimatixTM controller
●QSA2700:
– 3-color LED service indication
●QSA2700D:
– 2.4-inch color LCD screen for PM2.5 & PM10 values, and AQI indication
– Energy efficient mode: The screen is off if no obstacle is in front of the
sensor (within 1 m for several minutes)
– Micro USB DC 5V for display
– 4 selectable languages: English, Chinese (default), German, French
– 3 selectable Air Quality Index classes

Product overview
Device overview
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2.4 Device overview
1 Hole for wiring (top) for surface mounting
2 [QSA2700 only] LED
3 [QSA2700D only] LCD display
4(power supply for display only)
5 [QSA2700D only] Proximity sensor
6 Push button
7 Hole for wiring (bottom) for surface mounting
8 Hole for attaching the mounting plate to the housing
9 Air outlet
10 Air inlet

Product overview
Normal display overview of QSA2700D
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2.5 Normal display overview of QSA2700D
1PM2.5 value in μg/m3
2The current Air Quality Index category
3PM2.5 trend in rolling 24 hours
4Particle numbers
PM2.5 in μg/m3
PM2.5 & PM10 in μg/m3
PM2.5 & PM10 in μg/m3+
24 hours trend
PM2.5 & PM10 in μg/m3
and particles/m3

Installation
Mounting requirements
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3 Installation
3.1 Mounting requirements
●The sensor is suitable for conduit box mounting, dry wall mounting (with
mounting hole for wires concealed) and surface mounting.
●The recommended height is 1.2-1.5 m above the floor, especially for type with
display.
●Do not mount the sensor in recesses, shelves, behind curtains or doors, or
above heat sources.
●Avoid direct solar radiation.
●Seal the conduit box or the installation tube if any, as air currents can affect
sensor readings.
●Make sure ambient conditions are within 0…50 °C and 5...95% r.h. (no
condensation).
●Do not mount device in places full of oil smog, e.g. in a kitchen.
●Peel off the protective film on air inlet and air outlet before using.
●The air inlet and outlet must be free of any blockage, particularly the floc type
of dirt.
NOTICE
High concentrations of cigarette/oil smog in, for example,
smoking rooms, may
affect the optical components inside the sensors. We highly recommend replacing
the sensor module at the latest annually in such environments.
NOTICE
Ultrasonic humidifiers can create fine dust from unpurified water that can distort
sensor readings. Do not use in spaces with PM2.5 controlled ventilation.
Mounting position

Installation
Wiring
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●Wire stripper
●Screw driver
●Pencil, level & drill (for dry wall mounting and surface mounting only)
Wires for Specifications
Power supply 0.4 to 1.5 mm2
Analog output 0.4 to 1.5 mm2
Modbus output Twisted pair 0.4 to 1.5 mm2
Length <600m
3.2 Wiring
G, G0: Operating voltage AC 24 V (SELV) /
DC 13.5…35 V
U1: Signal output DC 0...10 V for PM2.5 with selected
range in μg/m3
U2: Signal output DC 0...10 V for PM10 with selected
range in μg/m3
Gu: Signal ground for U1 & U2
+,-, Ref: Modbus signal
Mounting dimensions
Mounting tools
Wire specification

Installation
In
stallation
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3.3 Installation
1. Separate the housing from the mounting plate using a screw driver.
2. Screw and fix the mounting plate on a conduit box (Conduit box mounting), or
on a wall (Dry wall mounting if there is a mounting hole and the wires are
concealed in the hole; Surface mounting if there is no mounting hole).

Installation
Installation
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3. Connect and screw wires correctly to the terminal. For surface mounting, you
must break out the wiring hole at the top or bottom first.
4. Attach the housing to the mounting plate at the top and then snap on the
housing at the bottom.

Configurations
Modbus configuration parameters
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4 Configurations
4.1 Modbus configuration parameters
The sensor is a Modbus (RS485) slave device, configurable via a Modbus master.
Name Range / Enumeration Default
Configurable Address 1...247 1
Baud rate (bps) 1 = 9600 / 2 = 19200/
3 = 38400 / 4 = 57600 19200
Transmission format 0 = 1-8-E-1 / 1 = 1-8-O-1 /
2 = 1-8-N-1 / 3 = 1-8-N-2 0
Basic Parity Even / Odd / No Even
Stop bits 1 / 2 1
Connection <= 32pcs/line
Data 8 bits (0-255)
Identity Slave
Cable length <600m
4.2 Modbus registers (Software version 1.2.12)
The following Modbus registers are used in software version 1.2.12 and previous.
Holding
Register
(16-bit)
No.
Name Description Default R/W
257 PM2.5 value Range: 0…500 R
258 PM10 value Range: 0…500 R
260 Sensor working status 0: Normal;
1: Replace sensor
module;
2: Communication
error
R
296 Software version Major version R
297 Software version Minor version R
298 Software version Build version R

Configurations
Modbus registers (Software version 1.3.13)
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Holding
Register
(16-bit)
No.
Name Description Default R/W
764 Modbus address 1…247 1 R / W
765 Baud rate 1= 9600bps;
2 = 19200bps;
3 = 38400bps;
4 = 57600bps
2 R / W
766 Transmission format (start bit
– data bits – parity – stop bit) 0 = 1-8-E-1;
1 = 1-8-O-1;
2 = 1-8-N-1;
3 = 1-8-N-2
0 R / W
768 Bus configuration command 0 = Ready;
1 = Load;
2 = Discard
0 R / W
Remarks:
●The register number is counted from 1.
●Register number 768 (Bus configuration command) is for ClimatixTM on-event
addressing configuration.
●Software version format: major version is 1 byte, minor version is 1 byte and
build version is 2 bytes, such as [2.01.33] = 0x02010021.
4.3 Modbus registers (Software version 1.3.13)
The following Modbus registers are used in software version 1.3.13 and later.
Holding
Register
(16-bit) No.
Name Description Default R/W
9 PM2.5 value Range: 0…500 R
10 PM2.5 reliablility 0: No error;
1: Bad reliability or
not available
R
11 PM10 value Range: 0…500 R
12 PM10 reliablility 0: No error;
1: Bad reliability or
not available
R
201 PM2.5 (μg/m3): Min. value
in rolling 24hours R
202 PM2.5 (μg/m3): Average
value in rolling 24hours R
203 PM2.5 (μg/m3): Max. value
in rolling 24hours R
204 Number of particles
PM0.3…PM0.5 In pcs for particle size between
0.3…0.5 micron
R
205 Number of particles
PM0.5…PM1.0 In pcs for particle size between
0.5…1.0 micron
R

Configurations
Modbus registers (Software version 1.3.13)
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Holding
Register
(16-bit) No.
Name Description Default R/W
206 Number of particles
PM1.0…PM2.5 In pcs for particle size between
1.0…2.5 micron
R
207 Number of particles
PM2.5…PM5.0 In pcs for particle size between
2.5…5.0 micron
R
209 Sensor working status 0: Normal;
1: Replace sensor
module;
2: Communication
error
R
216 Analog output range 0: 0…500 μg/m3
(default);
1: 0…300 μg/m3;
2: 0…100 μg/m3;
3: 0…50 μg/m3
0 R / W
217 Temperature value via bus -40…120 ℃
Resolution
increment is 1 ℃
R / W
218 Relative humidity value via
bus 0…100 %
Resolution
increment is 1 ℃
R / W
219 Data receiving interval via
bus (in min) for
temperature & relative
humidity
1…60 (min) 20 R / W
221 Enable temperature and
relative humidity display via
bus
0: disable (default);
1: enable 0 R / W
1286 Software version Major and minor
version R
1287 Software version Build version R
764 Modbus address 1…247 1 R / W
765 Baud rate 1= 9600bps;
2 = 19200bps;
3 = 38400bps;
4 = 57600bps
2 R / W
766 Transmission format (start
bit – data bits – parity –
stop bit)
0 = 1-8-E-1;
1 = 1-8-O-1;
2 = 1-8-N-1;
3 = 1-8-N-2
0 R / W
768 Bus configuration
command 0 = Ready;
1 = Load;
2 = Discard
0 R / W

Configurations
Modbus registers (Software
version 1.3.13)
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Remarks:
●The register number is counted from 1.
●The precondition for valid displays of temperature (register 217) and r.h.
(register 218) is as below:
– Register 221 is enabled.
– Display value “PM2.5 & PM10 in μg/m3” is selected as display format.
– Register values are transmitted from the master.
●In the case of a multiple writing command from the master with invalid values,
the sensor rejects the command with an error notice. The register values
remain unchanged.
●Bus configuration command (768) is for on-event addressing only.
●Software version format: major version is 1 byte, minor version is 1 byte and
build version is 2 bytes, such as [2.01.33] = 0x02010021.

Configurations
Push button configuration (QSA2700)
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4.4 Push button configuration (QSA2700)
4.4.1 On-event addressing (ClimatixTM controllers configuration)
On-event addressing is a rapid configuration approach working together with
Siemens ClimatixTM controllers.
The sensor is wired and connected to the Climatix TM controller via Modbus.
Press the
button for LED Action More details
1…5 s Constant red Press and hold the button
5…10 s LED off Release the button Entering the addressing mode, LED
flashes yellow for 30 s.
●Address is set to 246
temporarily.
Communication is established
automatically when:
●Baud rate is 19200 (default).
●Format is 1-8-E-1 (default).
●Address is 246.
Then:
●Master writes the Modbus
parameters.
●Master writes “1” into register
4x0768 ("Bus configuration
command”) to activate the
change.
After a successful pairing, the LED
flashes green for 60 s, then turns to
permanent green.
Otherwise, the LED turns back to its
original state.
LED flashes
yellow for
0…30 s
Short press the button to fix
the address to 246. If the LED is flashing, a short press of the push button fixes the address to
246.
The LED is off for 2 s, then turns
yellow for 2 s and then turns to
permanent green.
The address is 246.
Further configuration should be
carried out from controller side.
Enter addressing mode and
configuration workflow via
push button

Configurations
LED colors and patterns (QSA2700)
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4.4.2 Reset Modbus parameter
Press the
button for LED Action More details
1…5 s Constant red Press and hold the button
5…10 s LED off Press and hold the button
10…13 s Flash yellow Reset Modbus setting to
factory default if releasing
the button1)
Release the button while the LED still
flashes yellow. LED keeps flashing
yellow for 3 s. then turns red for 1 s.
The reset is completed. LED turns to
permanent yellow.
>13 s Returns to the
initial status Cancel resetting if releasing the button Release after 13 s, resetting is cancelled.
Remark:
1) Only Modbus address, baud rate and transmission format are reset to factory
default.
4.5 LED colors and patterns (QSA2700)
Color Pattern Description
Green Permanently on Working properly, Modbus configured
Yellow Permanently on Working properly, Modbus with factory settings
Red Permanently on Error 1, replace sensor module
Red Flashing (0.5 s on / 0. 5 s off) Error 2, communication error
Red / yellow Flashing (0.5 s red / 0. 5 s yellow) Possible inaccurate measurement
4.6 Initial setup (QSA2700D)
In the following steps:
●
short press means short press the push button
●
long press (>2 s) means long press the push button (2…10 s)
Reset Modbus settings or
cancel resetting

Configurations
Initial setup (QSA2700D)
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Step Description Picture
1 Power on the device:
Page 1 is displayed.
Then in
page 1 :
1.
Short press to select the language.
2.
Long press (>2 s) to save the selection and
then enter next page (
page 2 ).
Page 1
2 From
page 1 , long press (>2 s) to enter page 2 .
Then in
page 2:
1. Short press to select among the different
classes.
2.
Long press (>2 s) to save the selection and
then enter next page (
page 3 ).
Tip: refer to Air Quality Index classes [➙36] for
more info about AQI.
Page 2
3 From
page 2 , long press (>2 s) to enter page 3 .
Initial setup is completed.
Page 3
4 From
page 3, short press to enter page 4 .
Then in
page 4 , scan the QR code for the link to
download the document.
Page 4
Note: If the device powers off during the initial setup (steps 1-3), restart at step 1.