Sentera Controls DSTHG-2 Mounting And Operating Instructions

DSTHX-2 COMBINED TEMPERATURE AND RELATIVE HUMIDITY DUCT TRANSMITTER

2 - 10 Table of contents SAFETY AND PRECAUTIONS 3 PRODUCT DESCRIPTION 4 ARTICLE CODES 4 INTENDED AREA OF USE 4 TECHNICAL DATA 4 STANDARDS 4 OPERATIONAL DIAGRAMS 5 WIRING AND CONNECTIONS  5 MOUNTING & OPERATING INSTRUCTIONS IN STEPS 5 OPERATING INSTRUCTIONS 8 MODBUS REGISTER MAPS 9 VERIFICATION OF INSTALLATION INSTRUCTIONS 10 TRANSPORT AND STORAGE  10 WARRANTY AND RESTRICTIONS 10 MAINTENANCE  10 DSTHX-2 COMBINED T AND rH DUCT TRANSMITTER

3 - 10 back to the table of contents SAFETY AND PRECAUTIONS Read all the information, the datasheet, mounting and operating instructions and study the wiring and connection diagram before working with the product. For personal and equipment safety, and for optimum product performance, make sure you entirely understand the contents before installing, using, or maintaining this product. For safety and licensing (CE) reasons, unauthorised conversion and / or modifications of the product are inadmissible. The product should not be exposed to abnormal conditions, such as: extreme temperatures, direct sunlight or vibrations. Long-term exposure to chemical vapours in high concentration can affect the product performance. Make sure the work environment is as dry as possible; avoid condensation. All installations shall comply with local health and safety regulations and local electrical standards and approved codes. This product can only be installed by an engineer or a technician who has expert knowledge of the product and safety precautions. Avoid contacts with energised electrical parts; always treat the product as if it is live. Always disconnect the power supply before connecting, servicing or repairing the product. Always verify that you apply appropriate power supply to the product and use appropriate wire size and characteristics. Make sure that all the screws and nuts are well tightened and fuses (if any) are fitted well. Recycling of equipment and packaging should be taken into consideration and these should be disposed of in accordance with local and national legislation / regulations. In case there are any questions that are not answered, please contact your technical support or consult a professional.        DSTHX-2 COMBINED T AND rH DUCT TRANSMITTER

4 - 10 back to the table of contents PRODUCT DESCRIPTION The DSTHX-2 series are dual duct transmitters which measure temperature and relative humidity. They feature a wide range of low voltage power supply and two analogue / modulating outputs. All parameters are accessible via Modbus RTU. ARTICLE CODES Article code Supply Maximum power consumption Nominal power consumption Imax DSTHG-2 18—34 VDC 1,68 W 1,26 W 70 mA 15—24 VAC ±10% 1,8 W 1,35 W 75 mA DSTHF-2 18—34 VDC 1,68 W 1,26 W 70 mA INTENDED AREA OF USE Monitoring duct temperature and relative humidity in HVAC applications TECHNICAL DATA ■ ■Selectable temperature range: -30—70 °C ■ ■Selectable relative humidity range: 0—100 % ■ ■Accuracy: ±0,4 °C (0—50 °C); ±3 % rH (5—85 % rH), depending on the selected parameter ■ ■Modbus RTU communication ■ ■Bootloader for updating the firmware via Modbus RTU communication ■ ■Minimum airflow velocity required: 1 m/s ■ ■Enclosure and probe material: ► ►ASA, grey (RAL9002) ■ ■Protection standard: Enclosure: IP54, probe: IP20 ■ ■Operating ambient conditions: ► ►temperature: 0—50 °C ► ►rel. humidity: 5—85 % rH, (non-condensing) ■ ■Storage temperature: -10—60 °C STANDARDS ■ ■EMC Directive 2014/30/EC: ► ►EN 61326-1:2013 Electrical equipment for measurement, control and laboratory use - EMC requirements - Part 1: General requirements ► ►EN 61326-2-3:2013 Electrical equipment for measurement, control and laboratory use - EMC requirements - Part 2-3: Particular requirements - Test configuration, operational conditions and performance criteria for transducers with integrated or remote signal conditioning ■ ■WEEE Directive 2012/19/EC ■ ■RoHs Directive 2011/65/EC DSTHX-2 COMBINED T AND rH DUCT TRANSMITTER

5 - 10 back to the table of contents OPERATIONAL DIAGRAMS Analogue output 1 [%] 100 -30 Min range Max range 70 T [°C] Analogue output 2 [%] 100 0 Min range Max range 100 rH [%] WIRING AND CONNECTIONS Article type DSTHF-2 DSTHG-2 VIN 18—34 VDC 18—34 VDC 15—24 VAC ±10% GND Ground Common ground AC ~ A Modbus RTU (RS485), signal A Modbus RTU (RS485), signal A /B Modbus RTU (RS485), signal /B Modbus RTU (RS485), signal /B AO1 Analogue / modulating output 1 for temperature measurement (0—10 VDC / 0—20 mA / PWM) Analogue / modulating output 1 for temperature measurement (0—10 VDC / 0—20 mA / PWM) GND Ground AO1 Common ground AO2 Analogue / modulating output 2 for relative humidity measurement (0—10 VDC / 0—20 mA / PWM) Analogue / modulating output 2 for relative humidity measurement (0—10 VDC / 0—20 mA / PWM) GND Ground AO2 Common ground Connections Spring contact terminal blocks, cable cross section: 1,5 mm2 CAUTION The -F version of the product is not suited for 3-wire connection. It has separate grounds for power supply and analogue output. Connecting both grounds together might result in incorrect measurements. Minimum 4 wires are required to connect -F type sensors. The -G version is intended for 3-wire connection and features a ‘common ground’. This means that the ground of the analogue output is internally connected with the ground of the power supply. For this reason, -G and -F types cannot be used together on the same network. Never connect the common ground of -G type articles to other devices powered by a DC voltage. Doing so might cause permanent damage to the connected devices. DSTHX-2 COMBINED T AND rH DUCT TRANSMITTER

6 - 10 back to the table of contents MOUNTING & OPERATING INSTRUCTIONS IN STEPS Before you start mounting the DSTHX-2 duct transmitter, read carefully “Safety and Precautions”. Follow these steps: 1. When preparing to mount the DSTHX-2, bear in mind that the unit itself must be installed onto the outer surface of the duct both via fixing the flexible flange or directly the unit enclosure, while the probe must be inserted inside the duct, see Fig. 1 and Fig. 2 below. Fig. 1 Mounting dimensions With flange Without flange 60 Ø 12 2x Ø 5 86,8 18,5 42,3 50 285 34,5 4x Ø 4,4 70 66 100 105 80 Fig. 2 Mounting position Correct Incorrect AIR FLOW AIR FLOW DSTHX-2 COMBINED T AND rH DUCT TRANSMITTER

7 - 10 back to the table of contents 2. Having selected the appropriate mounting location, proceed with the following steps: 2.1 Drill a Ø 13 mm hole into the duct and insert the probe. Apply an air-tight sealing between probe and duct. 2.2 Fix the flange onto the duct outer surface using the self-drilling screws delivered with the unit. If you do not intend to use the flange, insert the tube and fix the enclosure onto the duct. Mind the airflow direction (see Fig. 2 and Fig. 3). Fig. 3 Mounting requirements 7,5*D(1) 3,5*D (1)D = Duct diameter ATTENTION Installation requirements: The DSTHX-2 must not be installed in turbulent air zones. Ensure sufficiently long settling zones upstream and downstream of the tapping point. A settling zone consists of a straight section of pipe or duct with no obstructions. Avoid installation near filters, cooling coils, fans, etc. The sensor will achieve the optimal result when the measurement is taken at least 7,5 duct diameters downstream and at least 3 duct diameters upstream from any turns or flow obstructions. ATTENTION Installation of the unit near high EMI-emitting devices may lead to faulty measurements. Use shielded wiring in areas with high EMI. ATTENTION Keep at least 15 cm distance between the sensor lines and the 230 VAC power lines. 2.3 Install the tube at the desired depth and, in case you use the flange, fix it via the plastic white screw in the flexible flange. 2.4 Unscrew the cover of the unit to remove it and insert the connecting cables through the cable gland of the unit. 2.5 Do the wiring according to the information in section “Wiring and connections” adhering to Fig. 4 below. DSTHX-2 COMBINED T AND rH DUCT TRANSMITTER

8 - 10 back to the table of contents Fig. 4 Wiring and connections Analogue / modulating 1 - T (0—10 VDC / 0—20 mA / PWM) Modbus RTU A /B Supply voltage DSTHF-2: 18—34 VDC DSTHG-2: 18—34 VDC / 15—24 VAC ±10 % Analogue / modulating output 2 - rH (0—10 VDC / 0—20 mA / PWM)  3. Close the enclosure and fix the cover. 4. Switch on the power supply. 5. Customise the factory settings to the desired ones via the 3SModbus software or Sensistant (if necessary). For the default factory setting see Table Modbus register maps. Optional settings To assure correct communication, the NBT needs to be activated in only two devices on the Modbus RTU network. If necessary, enable the NBT resistor via 3SModbus or Sensistant (Holding register 9). Example 1 Example 2 RX ТX NBT NBT NBT Slave 2 Master Slave n Slave 1 Slave 2 Slave 1 RX ТX NBT NBT Master Slave n NOTE On a Modbus RTU network, two bus terminators (NBTs) need to be activated.  CAUTION Do not expose to direct sunlight! OPERATING INSTRUCTIONS Calibration procedure: Both the relative humidity and temperature sensor elements are factory calibrated. Recalibration is not necessary. Bootloader Thanks to the bootloader functionality, the sensor firmware can be updated via Modbus RTU communication. To enter “Boot mode”, put a jumper onto pins 3 and 4 of the P1 header and restart the power supply (see Fig. 5). Once ‘Boot mode’ is activated, the firmware can be updated via SM Boot application (part of 3SModbus software suite) or Sensistant. DSTHX-2 COMBINED T AND rH DUCT TRANSMITTER

9 - 10 back to the table of contents Fig. 5 P1 header 1 2 3 4 5 Put a jumper onto pins 1 and 2 and wait for at least 5 seconds to reset the Modbus communication parameters 1 2 3 4 5 Put a jumper onto pins 3 and 4 and restart the supply to enter bootloader mode MODBUS REGISTER MAPS MODBUS REGISTER MAP INPUT REGISTERS Input Registers Data type Description Data Values 1 Temperature reading signed int Actual temperature level -300—700 500 = 50,0°C 2 Output value 1 (T) unsigned int Output value 1 (T) 0—1.000 0 = 0 % 1.000 = 100 % 3 Temperature alert flag unsigned int Flag indicates that measured Temperature is outside set alert values. Set to '1' when the measured value is outside the Temperature alert values defined by holding registers 13 and 14 0—1 0 = Temperature measurement OK 1 = Temperature measurement too low/ high 4 Temperature range limit flag unsigned int Flag indicates that measured temperature is outside set range limit values. Set to '1' when the measured temperature is outside limit range values defined by holding registers 11 and 12 0—1 0 = Temperature range OK 1 = Temperature range too low/high 5 Humidity, temperature sensor fault unsigned int Flag that shows if the communication with temperature & humidity sensor is lost 0—1 0 = No 1 = Yes 6—9 Reserved, return 0 10 Relative humidity level unsigned int Actual relative humidity level 0—1.000 1.000 = 100,0 % rH 11 Output value 2 (rH) unsigned int Output value 2 (rH) 0—1.000 0 = 0 % 1.000 = 100 % 12 Relative humidity alert flag unsigned int Flag indicates that measured Relative humidity is outside set alert values. Set to '1' when the measured value is outside the Relative humidity alert values defined by holding registers 21 and 22 0—1 0 = Relative humidity measurement OK 1 = Relative humidity measurement too low/high 13 Relative humidity range limit flag unsigned int Flag indicates that measured Relative humidity is outside set range limit values. Set to '1' when the measured Relative humidity is outside limit range values defined by holding registers 19 and 20 0—1 0 = Relative humidity range OK 1 = Relative humidity range too low/high 14 Humidity, temperature sensor fault unsigned int Flag that shows if the communication with temperature & humidity sensor is lost 0—1 0 = No 1 = Yes 15 Dew point level signed int Calculated dew point -700—700 200 = 20,0°C 16—50 Reserved, return 0 HOLDING REGISTERS Holding Registers Data type Description Data Values 1 Device slave address unsigned int Modbus device address 1—247 default: 1 2 Modbus baud rate unsigned int Modbus communication baud rate 0—6 default: 2 0 = 4.800 1 = 9.600 2 = 19.200 3 = 38.400 4 = 57.600 5 = 115.200 6 = 230.400 3 Modbus parity unsigned int Parity check mode 0— 2 default: 1 0 = 8N1 1 = 8E1 2 = 8O1 4 Device type unsigned int Device type. Read only DSTHG-2 = 1.632 DSTHF-2 = 1.633 5 HW version unsigned int Hardware version of the device. Read only XXXX 0x0100 = HW version 1.0 6 FW version unsigned int Firmware version of the device. Read only XXXX 0x0200 = FW version 2.2 7 Reserved, returns 0 8 Modbus safety timeout unsigned int After time with no Modbus communication, outputs are set to 0. 0—60 default: 0 60 = 60 minutes 9 Modbus network resistor termination (NBT) unsigned int Set device as end device of the line / or not by connecting NBT 0—1 default: 0 0 = NBT disconnected 1 = NBT connected 10 Modbus registers reset unsigned int Resets Modbus Holding registers to default values. When finished this register is automatically reset to '0' 0—1 default: 0 0 = Idle 1 = Reset Modbus Registers 11 Minimum temperature range unsigned int Minimum value of temperature range, cannot be set higher than maximum temperature range minus 5°C -300 - (Max-50) default: 0 100 = 10,0°C 12 Maximum temperature range unsigned int Maximum value of temperature range, cannot be set less than minimum temperature range plus 5°C (Min+50)—700 default: 500 500 = 50,0°C 13 Minimum temperature alert unsigned int Minimum temperature alarm value Min. temperature range —Max. temperature alarm default: 0 500 = 50,0°C 14 Maximum temperature alert unsigned int Maximum temperature alarm value Min. temperature alarm —Max. temperature range default: 500 500 = 50,0°C 15—18 Reserved, return 0 DSTHX-2 COMBINED T AND rH DUCT TRANSMITTER

10 - 10 back to the table of contents HOLDING REGISTERS Holding Registers Data type Description Data Values 19 Minimum relative humidity range unsigned int Minimum value of relative humidity range, cannot be set higher than maximum relative humidity range minus 5% 0—(Max-50) default: 0 200 = 20,0 % rH 20 Maximum relative humidity range unsigned int Maximum value of relative humidity range, cannot be set less than minimum relative humidity range plus 5% (Min+50)—1.000 default: 1.000 850 = 85 % rH 21 Minimum relative humidity alert unsigned int Minimum relative humidity alarm value Min. relative humidity range—Max. relative humidity alarm default: 0 200 = 20,0 % rH 22 Maximum relative humidity alert unsigned int Maximum relative humidity alarm value Min. relative humidity alarm —Max. relative humidity range default: 1.000 850 = 85 % rH 23—40 Reserved, return 0 41 Output 1 type (T) unsigned int Select analogue / modulating output 1 type 1—3 default: 1 1 = 0—10 VDC 2 = 0—20 mA 3 = PWM 42 Output 1 overwrite (T) unsigned int Enables the direct control over the temperature output. 0—1 default: 0 0 = Disabled 1 = Enabled 43 Output 1 overwrite value (T) unsigned int Overwrite value for output 1. Active only if Holding register 42 is set to 1. 0—1.000 default: 0 0 = 0 % 1.000 = 100 % 44 Internal voltage source selection Output 1 (T) unsigned int Selection of internal voltage source for PWM output 1. 0—1 default: 0 0 = 3,3 VDC 1 = 12 VDC 45—50 Reserved, return 0 51 Output 2 type (rH) unsigned int Select analogue / modulating output 2 type. 1—3 default: 1 1 = 0—10 VDC 2 = 0—20 mA 3 = PWM 52 Output 2 overwrite (rH) unsigned int Enables the direct control over the relative humidity output. 0—1 default: 0 0 = Disabled 1 = Enabled 53 Output 2 overwrite value (rH) unsigned int Overwrite value for output 2. Active only if Holding register 52 is set to 1. 0—1.000 default: 0 0 = 0 % 1.000 = 100 % 54 Internal voltage source selection Output 2 (rH) unsigned int Selection of internal voltage source for PWM output 2. 0—1 default: 0 0 = 3,3 VDC 1 = 12 VDC 55—80 Reserved, return 0 If you want to find out more about Modbus over serial line, please visit: http://www.modbus.org/docs/Modbus_over_serial_line_V1_02.pdf VERIFICATION OF INSTALLATION INSTRUCTIONS If your unit does not function as expected, please check the connections. TRANSPORT AND STORAGE Avoid shocks and extreme conditions; store in original packing. WARRANTY AND RESTRICTIONS Two years from the delivery date against defects in manufacturing. Any modifications or alterations to the product after the date of publication relieve the manufacturer of any responsibilities. The manufacturer bears no responsibility for any misprints or mistakes in this data. MAINTENANCE In normal conditions this product is maintenance-free. If soiled, clean with a dry or damp cloth. In case of heavy pollution, clean with a non‑aggressive product. In these circumstances the unit should be disconnected from the supply. Pay attention that no fluids enter the unit. Only reconnect it to the supply when it is completely dry. DSTHX-2 COMBINED T AND rH DUCT TRANSMITTER