A6V11396712 Smart Infrastructure 2020-08-17 Fine Dust Room Sensors QSA2700D/QSA2700/AQS2700 These sensors acquire the PM2.5 and PM10 concentrations in a room. ● Operating voltage AC/DC 24V ● Signal output 0 to 10 Vdc for PM2.5 and PM10 ● Communicative output, Modbus RS485 ● Range of use 32°F to 122°F (0 to 50°C)/5 to 95% r.h. (non-condensing) 2 Siemens A6V11396712 Smart Infrastructure 2020-08-17 Use The fine dust room sensor is designed to measure and transmit indoor concentrations of PM2.5 and PM10. ● 0 to 10V and Modbus output ● Configurable Modbus parameters ● Quick configuration (on-event addressing) with Siemens Climatix TM controller ● QSA2700: – 3-color LED service indication ● QSA2700D: – 2.4-inch color LCD screen for PM2.5 and PM10 values and AQI indication – Energy efficient mode: The screen is off if no obstacle is in front of the sensor (within 3 feet [1 m] for several minutes) – Micro USB 5 Vdc for display – Four selectable languages: English, Chinese, German, French – Three selectable Air Quality Index classes Type summary Product number 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 Order and delivery When ordering, provide the name and product number, for example: fine dust room sensor QSA2700. Each product includes 1 fine dust room sensor (with a pre-installed AQS2700), 1 plastic mounting plate and 2 screws. Functions Device overview 3 Siemens A6V11396712 Smart Infrastructure 2020-08-17 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 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 Modbus configuration The device is configurable by a Modbus master device. Configure the device before mounting. See Modbus registers (Software version 1.2.12) [ ➙ 9] and Modbus registers (Software version 1.3.13) [ ➙ 10] for more information. Push button operations for Modbus resetting and configuration QSA2700: 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. 4 Siemens A6V11396712 Smart Infrastructure 2020-08-17 Enter addressing mode and configuration workflow using push buttons Press the button for LED Action More details 1 to 5 seconds Constant red Press and hold the button 5 to 10 seconds LED off Release the button Entering the addressing mode, LED flashes yellow for 30 seconds. ● Address is temporarily set to 246. 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 seconds, then turns to permanent green. Otherwise, the LED turns back to its original state. LED flashes yellow for 0 to 30 seconds Short press the button to set the address to 246. If the LED is flashing, a short press of the push button sets the address to 246. The LED is off for 2 seconds, then turns yellow for 2 seconds and then turns to permanent green. The address is 246. Further configuration should be carried out from the controller side. Reset Modbus settings or cancel resetting Press the button for LED Action More details 1 to 5 seconds Constant red Press and hold the button 5 to 10 seconds LED off Press and hold the button 10 to 13 seconds Flash yellow Reset Modbus setting to factory default if releasing the button 1) Release the button while the LED still flashes yellow. LED keeps flashing yellow for 3 seconds. then turns red for 1 second. The reset is completed. LED turns to permanent yellow. >13 seconds Returns to the initial status Cancel resetting if releasing the button Release after 13 seconds, resetting is cancelled. Remark: 1) Only Modbus address, baud rate and transmission format are reset to factory default. 5 Siemens A6V11396712 Smart Infrastructure 2020-08-17 QSA2700D: 1. to 10 seconds to enter the 2.following the display indication, press the button for 2 to 10 seconds to enter the for Modbus configuration. 3.t the desired operation by briefly pressing the button. 4., activate the operation by pressing the button for : • 2 to 10 seconds, to configure manually; • 5 to 10 seconds, to configure the device via Climatix™ or LCD operation interface; • 10 to 20 seconds, to reset the Modbus settings. Mechanical design 1 Mounting plate 2 Two screws 3 Fine dust room sensor Product documentation Title Document Type Document Number Installation, basic operation, parameters Mounting instructions A6V11160930 Operation, maintenance, troubleshooting Basic documentation A6V11160936 CE declaration CE declaration A6V11277342 Product environmental declaration Product environmental declaration A6V11284595 QSA Series Fine Dust Sensors with Selectable Measuring Range Submittal sheet A6V11380383 All documentation can be downloaded at http://siemens.com/bt/download. Notes Security CAUTION National safety regulations Failure to comply with national safety regulations may result in personal injury and property damage. Observe national provisions and comply with the appropriate safety regulations. Engineering notes Shielded cables must be used in environments with EMC problems. 6 Siemens A6V11396712 Smart Infrastructure 2020-08-17 Twisted pair cables are required for the secondary supply lines and the signal lines. Mounting ● The sensor is suitable for conduit box mounting, dry wall mounting (with mounting hole for wires concealed) and surface mounting. ● The recommended height is 5 ft (150 cm) 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 32 to 122°F (0 to 50°C)/5 to 95% r.h. (no condensation). ● Do not mount device in places full of oily smoke, for example, 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. Proximity sensor ● The QSA2700D includes a built-in proximity sensor and enters into energy efficient mode if no obstacle is detected in front of the sensor (within 3 feet [1 m] for several minutes). In energy efficient mode, the screen is off and the sensor is working and transmitting the signals at regular intervals. Otherwise, the screen is activated and the sensor is in continuous working mode. ● The QSA2700 does not have a proximity sensor and is working continuously. ● Keep the proximity sensor area clean as dirt may affect the detection performance. Replacing the AQS2700 Sensor module accuracy is influenced by ambient environment. Replace the module every 1 to 3 years depending on the local environment. In environments with continuously high PM2.5 concentrations (that is greater than 300 μg/m3, for example, a smoking room), replace the module more often. To replace the sensor module: 1. Detach the housing from the mounting plate using a flat-blade screwdriver. 7 Siemens A6V11396712 Smart Infrastructure 2020-08-17 2. Remove the module by hand and replace it with a new one. NOTICE Turn off the device before replacing the sensor module. If not possible, insert a new sensor module 10 seconds after the old one is removed. Disposal The device is considered electrical and electronic equipment for disposal in terms of the applicable European Directive and may not be disposed of as domestic garbage. ● Dispose of the device through channels provided for this purpose. ● Comply with all local and currently applicable laws and regulations. 8 Siemens A6V11396712 Smart Infrastructure 2020-08-17 Technical data Power supply Operating voltage AC 24V ±20% / DC 13.5 to 35V Frequency 50/60 Hz @ AC 24V Power consumption 4 VA Functional data for PM2.5 Measuring range (selectable) QSA2700D: Select using user interface QSA2700: Select using Modbus register 216 ● 0 to 500 μg/m 3 ● 0 to 300 μg/m 3 ● 0 to 100 μg/m 3 ● 0 to 50 μg/m3 Unit to unit variability Max of ±15 μg/m3 and ±15% of reading @ 77°F (25°C) and 50% r.h. Analog output signal, (terminal U1) 0 to 10 Vdc, linear, corresponding to selected measuring range Functional data for PM10 Measuring range (selectable) QSA2700D: Select using user interface QSA2700: Select using Modbus register 216 ● 0 to 500 μg/m3 (Default) ● 0 to 300 μg/m 3 ● 0 to 100 μg/m3 ● 0 to 50 μg/m 3 Unit to unit variability Max of ±15 μg/m 3 and ±15% of reading @ 77°F (25°C) and 50% r.h. Analog output signal, (terminal U2) 0 to 10 Vdc, linear, corresponding to selected measuring range Connections Interface Micro USB 5V power connection for display only Wiring connections Screw terminals Solid wires or prepared stranded wires: 18 to 26 AWG2 Slotted screws Size 1, tightening torque 0.6 Nm (0.44 lb-ft). Wiring lengths for signals. 1970 ft (600 m) Communication Communication Protocol RS485 ModBus Transmit Mode RTU Baud rate (configurable) 9600, 19200 (default), 38400 and 57600 BPS Modbus address (configurable) 1 (default) to 247 Data 8 bits (0 to 255) Parity (configurable, following the Transmission Format) No Parity or Odd or Even (default) Stop bits (configurable, following the Transmission Format) 1 (default) or 2 Max. cable length 1000 m (±200 m) Identity Slave 9 Siemens A6V11396712 Smart Infrastructure 2020-08-17 Transmission Format (start bit - data bits – parity – stop bit) 0=1-8-E-1 (default) / 1=1-8-O-1/ 2=1-8-N-1 / 3=1-8-N-2 Bus Termination No Reset button Yes Modbus registers (Software version 1.2.12) The following Modbus registers are used in software version 1.2.12 and earlier. Holding Register (16-bit) No. Name Description Default R/W 257 PM2.5 value Range: 0 to 500 R 258 PM10 value Range: 0 to 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 764 Modbus address 1 to 247 1 R/W 765 Baud rate 1= 9600 bps; 2 = 19200 bps; 3 = 38400 bps; 4 = 57600 bps 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. Next >