Sentera Controls DSTH 2 Series Mounting And Operating Instructions Download | Manualshive

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Mounting and operating instructions

DSTHX-2

COMBINED TEMPERATURE

AND RELATIVE HUMIDITY DUCT

TRANSMITTER

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Summary of Contents for DSTH 2 Series

Page 1: ...Mounting and operating instructions DSTHX 2 COMBINED TEMPERATURE AND RELATIVE HUMIDITY DUCT TRANSMITTER ...

Page 2: ...D 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 ...

Page 3: ...ssible 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...

Page 4: ...ccuracy 0 4 C 0 50 C 3 rH 5 85 rH dependingontheselectedparameter 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...

Page 5: ...M 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 ...

Page 6: ...e 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 Incorrec...

Page 7: ... 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 lea...

Page 8: ...ecessary 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 sen...

Page 9: ...t 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 D...

Page 10: ...DC 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 ...

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